W6VIO Calling
Contents
1. Other topics discussed included The need for status on the repeaters has the 445 20 antenna been replaced yet We still need to solve the 80m 40m noise problem in building 310 and plan to get to that sometime after Field Day No new news about the pending building 173 radio shack move Coutney Duncan will talk to Doug Millar to see if he can give his talk on Sidewalk EME for September 26th ed Doug Millar agreed We need to start thinking about whether there will be a December meeting either on or off Lab We also need to start thinking about lining up 2015 guest speakers Generator Repair By Jim Marr AA6QI Part of preparing for our upcoming Field Day was preparing the Club s two generators Figure 5 What June 2014 was planned to be routine maintenance oil change gapping spark plug cleaning oiling the air intake filter draining fuel line sediment and cleaning the exhaust spark arrester screen turned out to be a bit more complicated than anticipated Neither generator would start and one of them had ancient fuel in the tank that had partially solidified Since the lessons learned in restoring these two generators to operational status might be useful to Club members who have generators or other gasoline driven equipment in similar shape I thought that it was worth passing them along via this article Honda pn EM2200X 2kw EX1000 1kw 3 Figure 5 Our two generators Three of u2. all to be provided by Jim Marr but to be set up by this team Team Jim Longthorne WA6KPW Bob Deen N5DPU is a possible Power Generators gasoline extension cords and fire extinguisher Jim Marr will move the generators and extension cords from 173 to the FD site and provide the fire extinguisher and gasoline The sets them up at an appropriate location fuels them runs the extension cords and ensures that the generators are fueled throughout the FD exercise Team Walt Cisczcon KK6DUL and Nasrat Raouf KI6NAR 9 W6VIO Calling Art Center College of Design 1700 Lida St Pasadena CA Lida St i CAFE Level 2 Limited North end of main building Hours 8 30 AM to 2 PM Saturday ONLY Limited 626 396 2260 gt Check with cafe for late after hours pickup etc Grill with hamburgers sandwiches and salads beverages available Main Building Figure 14 Art Center layout showing our Field Day site lower right and where the restrooms and cafeteria are located Station Radio Bencher BY 1 paddles straight key Winkeyer headphones CAT cable instructions Jim Marr will transport the above equipment to the site The team sets it up and tests it Team Rob Smith W6GRV and Jim Marr Jim Marr will also provide a Yaesu FT 847 backup radio in case there is a problem with the FT 1000D Cushcraft R 7000 40m 10m vertical antenna R 7000 support base support mast guy ropes coax assembly tool
3. been drained from the gas tank through the carburetor as the manual instructs This fuel would eventually dry and might be the source of the clogged main jet orifice After thinking about this a bit I think that a way to prevent this might be to pull air though the carburetor after the fuel has been drained and while the carburetor fuel bowl drain is still open so that air will be drawn in through the fuel bowl and thus through the main jet orifice and the main nozzle This can be done by pulling on the starting cord several times just after draining all of the gas from the generator but before closing the carburetor fuel bowl drain I intend to try this after Field Day to see how well it will work but won t know the results until we next try to put the generators back in service perhaps for Field Day 2015 6 W6VIO Calling Figure 8 EX1000 Carburetor parts blowup showing the plugged main jet part 23 and plugged main nozzle part 11 The pilot jet part 24 was clear The last step in putting the generator to sleep always is to pull the starting cord until resistance is felt indicating the start of the compression stroke when both intake and exhaust valves are closed protecting the internals of the cylinder from exposure to the atmosphere Balun Adventure By Jim Marr AA6QI On Friday May 16 Bill Weber N6CI Steve Townes WB4ILW and I went down to our antenna container C7111 at the West end of the Arroyo parking
4. 0 hours of construction and about 25 hours of debugging Figure 2 N5BF s DSP 10 DSP 10 modes include CW USB LSB FM LHL 7 PUA43 EME2 LTI and whatever someone writes Google for explanation of the modes that you re not familiar with Other DSP 10 features include scrolling waterfall with many modes and rates all the usual controls numerous other controls and DOS key combinations i e scrl shift F4 The user interface Figure 3 is entirely handled via the screen and keyboard of a PC at least a x386 running DOS and talking to the radio via RS 232 The only control available at the radio itself is PTT on the microphone when set up properly for QSOs from the PC 3 WOoVIO Calling DEP TRANSCVUA 30 W7PUA DSPIO as 20 15 i 10 TAA RIAKI mv A JSA YY i ny cin j 1A Tes mS 972 000 A D Level DENIE D A Level ppp Figure 3 DSP 10 interface showing an AO 7 satellite pass What does he do with the DSP 10 As built using available group developed software it is a 2m all mode radio enabling working AO 7 doing some beacon DXing LTI mode and winning an ARRL VHF UHF contest Courtney goes on to describe his interest in QRP EME his station setup Figure 4 and his experiences this is really interesting stuff but the details would be lost if I tried to summarize it here He also described his interest in attempting E planet E communications discussing Venus Mercury and Mars as possibi
5. 2014 Power will be provided by one or both of our two generators we ll probably only need the Honda EM2200X 2kw generator but we ll bring both along PASADENA RADIO CLUB W6KA Field Day Driving Map Art Center College of Design Hillside Campus South Parking Lot 1700 Lida Street Pasadena CA 91103 Map Not to Scale Simplified for Clarity W Woodbury Rd 145 180 PL 156 7 Not monitored full time 2013 N1BN v3 0 Figure 13 Map to the 2014 Field Day site in the Art Center parking lot The PRC will provide the logging computer running the N3FJP Field Day logging program This computer will also be set up with macros for a Winkeyer to allow sending Field Day exchanges from the keyboard Training on the N3FJP logging program the Winkeyer and the FT 1000D will be provided at the June 20th JPLARC regular membership meeting see header above and will be broadcast over MeetingPlace so those who can t physically make it to the meeting can still follow along Instructions will also be available at the CW station table during Field Day We plan to have four two or more person teams and one four or more person team Having this many teams will make the setup from 7 a m to 11 a m an easy stress free activity These five teams are so far but anyone is welcome to come and help with setup Saturday from 7 a m to 11 a m or teardown on Sunday which starts at 11 a m Facilities Tent table chairs lights
6. WO6VIO Calling JL Jet Propulsion Laboratory Amateur Radio Club PO Box 842 La Canada CA 91012 0842 Volume 37 Issue 6 w 6vio arrl net http jplarc ampr org June 2014 President Stephen Townes WB4ILW 4 7525 Vice President Courtney Duncan NSBF 4 8336 Secretary Rob Smith W6GRV 3 7937 Treasurer Chuck Sarture KG6NF 4 2706 Director at Large Jim Marr AA6QI 3 1528 Upcoming Events EmComm Mgr Christopher Carson KE6ABQ 3 3888 WO6VIO Trustee Rob Smith W6GRV 3 7937 WO6JPL Trustee Eric Archer N6CV 4 7350 WR6JPL Trustee Jim Lux WORMK 4 2075 WR6AZN Trustee Bill Wood W6FXJ 760 256 9576 e Every Monday Emergency Communications Net Noon on WR6JPL 224 08 156 7 amp 445 20 103 5 or WR6AZN 223 96 156 7 on Table Mountain e JPLARC Board of Directors BOD meetings Normally the first working Friday every month from Noon to 1pm in 180 703C Call in 818 354 3434 ID 7373 Next is July 4 e QST QST QST JPLARC Regular Membership meetings Second working Friday every month from Noon to 1pm in 180 703C Call in 818 354 3434 ID 7373 Slides if any broadcast via meetingplace jpl nasa gov ID 7373 Next is June 20 Guest speaker Jim Marr AA6QI discussing Field Day 2014 Preparations In this issue This issue covers e May regular membership meeting May 23rd e Board of Directors meeting June 9th e JPLARC Generator repair e Balun adventure e Key click a
7. about come on down Any participation welcome Additional Comments Steve Townes reported that he is handing out membership cards If you haven t received yours see Steve Treasurer report Current balance is 4 338 14 Jim Marr Email has been sent out for the Field Day setup teams five of them looking for volunteers Mike tope will be looking into the option of using the CITARC mobile tribander tower trailer for this year s Field Day Jan amp Bob are going to test their newly provided access 2 W6VIO Calling to the JPL MESA to check on the equipment status Jim Lux may be leading a repeater work party in the near future A question was asked as to whether there was a repository for past JPLARC presentations and if so is it available for off lab access The current answer is no but that is a pending activity for the Internet Services Committee once we find a leader for that committee We have all of the back presentations for the past year we just need a place to put them that has external access a Yahoo group Guest Presentation Doug Millar K6JEY is ill and could not be here for his previously scheduled talk on Sidewalk EME We plan to work with him to reschedule for a later date ed Done now scheduled for September 26 Figure 1 Courtney Duncan N5BF giving his talk Software Radios an Enabling Technology for Satellite Space and Ultra weak Signal Applications Courtne
8. aster such as the big one we may all be operating in abnormal situations in less than optimal conditions and you can bet that the bands will be incredibly crowded with all kinds of traffic Repeaters that are still operating will be loaded with traffic and probably not very available for your call home to check on your family at least not for a while although here at JPL we enjoy several repeaters that are likely to be available for our local use assuming that we have net control operators to run our nets on them These days with most served agencies having their own NIMS compliant communications systems and dedicated personnel I suspect that much of the ham band and repeater traffic will be health and welfare traffic check on family and friends rather than emergency or priority traffic but I could be wrong Practicing communications under these kinds of conditions heavy traffic is an important aspect of being able to get the message through when other means of communication are not available Field Day provides the perfect opportunity to have a little fun and practice this skill while roughing it a little Why not come out to our Field Day even at the Pasadena Art Center at 1700 Lida St just across the 210 from JPL As I ve said before this joint event with the Pasadena Radio Club and the Caltech Amateur Radio Club is intended to be a fun event not a serious contest event so if having radio fun is somet
9. discussion Station Facility Still no committee chair identified but Jim Marr agreed to serve temporarily until a chair can be identified EmComm Jim Erickson N6PGC has agreed to chair this committee and is working setting up a time for the committee to meet regularly Jim and Jan Tarsala WB6VRN have already met over lunch for an initial discussion Field Day Jim Marr reported on Field Day preparations status He briefly went through a list of expenses that he had turned in to Treasurer Chuck Sarture He also reported that he had taken Walt Mushagian s advice and added a 40m dipole to the 80m dipole and that we now plan to use the CITARC trailer with the crank up tower and Force 12 C35 20 15 10m Yagi The tower has a side arm that will be used as the apex for the 80m 40m dipole A work party is planned for 9 a m Friday June 13t at the Caltech maintenance yard on Holliston to prepare the trailer Mike Tope will bring the trailer to the Art Center Field Day site A six person team has been identified to put up and take down these antennas Good progress is also being made on lining up people for the remaining four teams Internet Services We discussed the importance of the work of this committee for the future of the club and the need to identify a chair Jim Marr agreed to enumerate the tasks for this committee Courtney Duncan has some ideas for who might be willing to undertake specific tasks once they re identified
10. h gain so that strong signals within the roofing filter bandwidth saturate the FET s drain This results in mixing products June 2014 IM that feed back into the 8MHz IF section creating interference to any desired weak signals these appear as phantom signals that sound like normal CW signals W8 I built two plug in boards Figure 10 that address these two issues Installation of these two boards was pretty simple given the clear installation instructions provided along with the two boards we purchased from Tom Rauch W8JI Installation of the two boards is shown in Figure 11 Noise Blanker correction board Keyclick correction board Figure 10 W8JI FT 1000D key click and noise blanker fix boards Bottom view of FT 1000D ry o Ae 28g L y PA w en c Noise Blanker Mod Figure 11 The W8JI key click and NB mod boards installed in our second FT 1000D To view the effectiveness of these mods see Mike Tope s 2004 write up referenced above which includes before and after waveforms Installation of these mods was considered by me to be essential for Field Day use of this FT 1000D since it will be operated in close proximity to four or five other HF transmitters therefore needing the NB mod and we certainly don t want to be generating key clicks that interfere with the other Field Day stations Now that they re installed we re good to go for Field Day 8 WOoVIO Calling ARRLFD14 _Ju
11. hing you d like to experience come on out and join us 10 W6VIO Calling ARRL Membership By Jim Marr AA6QI Asan ARRL affiliated club at least 51 of our membership must be ARRL members Today we have 65 as either Life 7 or Regular 23 ARRL members That leaves sixteen 2014 members who are not ARRL members While there are no requirements to maintain ARRL membership there are some clear advantages to having ARRL membership Some of these are Receiving the monthly QST magazine and having access to all back issues electronically Being able to subscribe to weekly ARRL news propagation forecasts and satellite ephemeris notifications Being able to subscribe to the electronic monthly Amateur Radio Emergency Service ARES newsletter that may be of interest to members who wish to stay current on emergency communications Member discounts on materials and training For example the ARRL Introduction to Emergency Communication Course is 85 for non members but only 50 for members You support ARRL the only significant amateur radio advocacy organization in the U S that is fighting to protect our access to the airwaves Should those of you who are not already members and may wish to join please do so through the Club rather than joining directly through ARRL Why If you join through the Club new members the Club retains 15 of your membership fee to support Club activities From your point of view the amoun
12. lities Then there s the ultra weak frontier including radar and below the noise QSOs where signals are 20 30dB weaker than traditional CW SSB Courtney also imagines an AMSAT tracking network and in house tracking capability based on SDR technology Courtney gave a brief orbit determination 101 and discussed using that for AO 7 and other amateur satellite orbit determination along with navigation issues like stable oscillators and system coherence Much of the ultra weak signal ground pioneered by experiments such as the DSP 10 have been advanced since this 2006 paper through the K1JT developed weak signal sound card modes which have been widely adopted See http physics princeton edu pulsar K1JT index html and linked pages for further information Courtney s current interests include participation in the various JT Modes and the advanced radio and radar possibilities enabled by them and he still uses the DSP 10 routinely as a 2 meter IF to a 23 cm EME station on 2 meters directly and as test equipment Why would anyone want to do EVE or an AMSAT tracking network Why would about ten people spend gt 0 5M on 3YOX Peter I Antarctica Answer because June 2014 DXCC exists you knew that DXCC is a well orchestrated game that s easy to start kind a easy steps forward can get very involved if you care to has a critical mass of participation and no one would care about Peter I without i
13. lot just south of building 306 and pulled out some coax and an 80m dipole to use for Field Day Later that day I set up the 80m dipole in my back yard to find out whether the dipole was resonant at 80m or 75m Using my MFJ 259B antenna analyzer I was unable to find any resonance at all anywhere An ohmmeter check showed that all ports of the W2AU balun Figure 9 were shorted together at DC Since I wasn t seeing any resonance at RF I assumed that the W2AU balun had been internally damaged and replaced it with a brand new MFJ 918 1 1 current balun Figure 9 that I had purchased for a project that I hadn t gotten around to yet Retesting the antenna with this new balun showed that the antenna was resonant at 3 500 MHz with a 2 0 1 bandwidth high point at 3 550 MHz good enough for the CW portion of the band where we plan to use it during Field Day We can always tweak it to be a little shorter to raise the resonance a little bit once we get it up where we want it at our Field Day site Next I wanted to investigate what was wrong with the W2AU balun Doing some more internet research I found that I wasn t the only one who didn t understand how to test this balun but did find some answers Putting a pair of 25 ohm resisters in series across the output of the balun and then testing with the MFJ 259B June 2014 antenna analyzer showed the correct 50 ohm impedance at RF and shorting the center between the two 25 ohm resisters o
14. lun if the antenna is unbalanced say due to proximity of one side to a structure or the feedline doesn t come away from the dipole exactly perpendicular to the antenna then current can still be present on the outside of the feedline coax Since the whole purpose of using a balun ina dipole is to keep those currents off of the outside of the 7 WOoVIO Calling coax shield a voltage balun isn t the right kind of balun to use for this application even though many hams still use one for that purpose An excellent discussion of balun testing including a table that demonstrates why the W2AU balun is a poor choice for this application is http www w68ji com balun_test htm Why do you want to keep currents off of the outside of the feedline coax shield There are number of reasons First those currents can cause problems in the shack depending upon what the current s path to ground is RF burns or RF feedback into station equipment or home entertainment equipment These currents can also radiate as another leg of the antenna changing the radiation pattern of the antenna For a stand alone dipole the radiation pattern won t change very much but for a dipole that is part of a Yagi beam antenna feedline radiation can significantly degrade the radiation pattern of the antenna e g front to back ratio Many hams myself included often don t even use a balun of any kind on their dipole antennas without incide
15. mp NB mods on our 274 FT 1000D e Field Day 2014 Preparations e Emergency communications e ARRL Membership e For Sale e Future membership meetings amp speaker topics May 23 Regular Membership Meeting By Rob Smith W6GRV Present were Bob Cesarone WAYJIB Courtney Duncan NSBF Mark Lysekt AG6TD Jim Marri AA6QI Steve Nolandt WA6KLC Rob Smitht W6GRV Mike Topet W5EF Steve Townest WB5ILW Fred Vescelust N6FV Bill Webert N6CL On the phone Chris Carsont KE56ABQ and Walt Mushagian K6DNS7 Note t indicates a regular member and Indicates BOD member For a regular meeting quorum the JPLARC Bylaws require a majority of the BOD 4 and at least five other regular members so we had a quorum Field day Field Day FD is June 28 amp 29th only two weeks away JPL is providing the CW station in a joint FD exercise with the Pasadena radio club at the Art center Plans are that there will be 2 or 3 SSB stations a satellite station a VHF UHF station a digital station PSK 31 and an NTS traffic station Setup begins at 7 00 am Saturday Field Day operations are from 11 a m Saturday to 11 a m Sunday Tear down starts at 11 a m Sunday At 6 p m Saturday evening there will be a potluck dinner At 8 a m Sunday morning there will be a pancake breakfast PRC runs Field Day as a fairly informal activity to encourage participation If you want to try a new operational mode or just see what Field Day is all
16. nej28 29 Figure 12 ARRL Field Day 2014 Logo 2014 Field Day Planning Update By Jim Marr AA6QI amp the FD Committee Field Day FD 2014 Figure 12 is now just a couple of weeks away and plans are firm for our joint FD with the Pasadena Radio Club PRC and Caltech ARC in the large parking lot of the Art Center off of Lida Street Figure 13 just a hop skip amp jump on the other side of the 210 freeway from JPL The PRC plans to have a VHF UHF station two or three SSB stations and a digital station PSK 31 and will be operating class 6A six active transmitters on emergency power Lunch Saturday only and restrooms are at the Art Center Figure 14 there will be a Saturday evening potluck dinner at 6 p m and a Sunday morning pancake breakfast at 8 a m Setup will begin at 7 a m Saturday morning contest operations begin at 11 am and run continuously through Sunday 11 a m followed by teardown JPLARC as CW Station Provider This year JPLARC will be providing the CW station and serving as the CW Station Captain including antennas amp some infrastructure items generator table tent etc The radio will be our second FT 1000D that we just installed the W8JI modes into as discussed above We plan to have three antennas an 80m 40m dipole a Cushcraft R 7000 40 through 10m vertical and just recently we decided to include the CITARC s Force 12 C3S triband Yagi with portable crank up tower June
17. nt especially if the feedline is in the plane perpendicular to the line of the dipole Others use a coil of coax 6 to 8 in diameter with 8 to 10 turns of coax near the feedpoint forming a current balun that is effective from 20m through 10m but not very effective at longer wavelengths due to it s air core I intend to spend much more time studying balun theory and construction now that my interest is peaked but at least for now our 80m dipole now an 80m 40m dipole following the addition of a 40m dipole is good to go for Field Day with the a reasonable 1 1 current balun installed Key Click amp NB Mods installed in 2 FT 1000D By Jim Marr AA6QI On Friday Mayt 30 I installed the W8JI key click and noise blanker modifications into our second FT 1000D the one targeted for use in our Field Day CW station These mods were installed in our other FT 1000D way back in 2004 by Mike Tope W4EF see Mike s excellent writeup in the March 2004 issue of W6VIO Calling at http jplarc ampr org calling 2004 mar04call pdf These mods fix two significant problems in the original FT 1000D design 1 The FT 1000D runs an essentially unshaped CW waveform into the filters causing unnecessary key clicks from almost 1 kHz below to 2 kHz above the transmit frequency and 2 The FT 1000D heavily forward biases the noise blanker s first FET whenever the blanker is turned OFF causing the FET hanging on the IF system to have hig
18. ot jet part 20 were clear Honda EX1000 1kw Generator Our second generator is a Honda EX1000 1kw generator and is the one in which gasoline has been left in the tank for a sufficiently long time that it had turned to sludge After a bit if internet surfing I found that lacquer thinner is a good solvent for gasoline sludge and purchased a couple of gallons I then disassembled the generator sufficiently to allow me to remove the fuel tank from the generator for cleaning Figure 7 For a couple of weeks I would fill the tank with lacquer thinner and would agitate it every morning and evening for a few days then pour out the resulting mixture After a couple of weeks the gas level gauge Figure 7 part 8 started working again and it was clear that a ereat deal of the sludge had dissolved but not all I then purchased a small bag of aquarium gravel to act as a scouring agent added some of that to the tank with the next batch of lacquer thinner then vigorously agitated the tank to scour all inside surfaces That worked really well leaving a pretty clean tank inside I then pulled and cleaned the fuel gauge which had acquired a bit of the aquarium gravel in the mechanism preventing it from moving Next I pulled the fuel outlet stopcock Figure 7 part 2 and found that it was completely plugged After much effort at attempting to clean the stopcock and in the process breaking the screen Figure 7 part 3 I gave up and
19. purchased a new one At this point the gas tank was reassembled and ready to put back in service June 2014 Figure 7 EX1000 Fuel Tank showing petcock assembly part No 2 that needed replacing Next after my experience with the other generator I pulled the carburetor and found the same problem with the plugged fuel main jet orifice and main nozzle Figure 8 parts 25 amp 11 respectively After cleaning the main jet orifice the main nozzle and the rest of the carburetor with spray carburetor cleaner I reassembled the carburetor reinstalled it put the whole generator back together added some gasoline and presto the generator fired right up Since I had messed with the speed governor adjustment I had to readjust that which turned out to be a bit trickier than I thought it would be I didn t have a service manual so had to figure out how to do it myself This generator also needed to have the gas tank gasket Figure 7 part 16 replaced a new air filter and an oil change After that it was good to go for Field Day Long Term Storage Procedure Given that both of these generators had plugged main jets in the carburetors even the one that had been correctly prepared for long term storage in accordance with the operating manual I wondered whether there might be a way to prevent that The cause I believe is a small amount of fuel that remains in the main jet orifice due to surface tension after the fuel has
20. r on either side of them to ground showed no change in measured impedance all as it should if the balun is OK MFJ 918 1 1 current balun W2AU 1 1 voltage balun Figure 9 W2AU balun removed from the 80m dipole and the MFJ 918 balun added to the 80m dipole That left me wondering why the balun didn t work when installed in the antenna Since I had already broken configuration I couldn t go back and check it again I can only conclude that the cause might have been corrosion between the balun pigtails and the antenna wires inside of the wire nuts that were used to connect the pigtails to the antenna wires instead of being soldered as they are now with the MFJ balun I then set off to understand what the difference was between the MFJ 918 and the W2AU baluns I started by reading the balun sections in the ARRL Handbook 2014 edition and the ARRL Antenna Book 227d edition Next I ordered a copy of Jerry Sevick W2FMI s book Understanding Building and Using Baluns and Ununs These helped me understand that the MFJ 918 is a 1 1 current balun and the W2AU is a 1 1 voltage balun where the 1 1 means there is no impedance matching going on in these baluns A current balun makes sure that the current in the two arms of the dipole are the same thus eliminating any current on the outside of the feedline coax while a voltage balun only makes the voltage at the dipole wires the same where they tie to the balun With a voltage ba
21. s Bill Weber Jorge Gonzalez and me set out to service the generators on Friday May 274 Honda EM2200X 2kw Generator The first of our generators is a Honda EM2200X 2kw generator from the 1980 s A note on the generator indicated that it was configured per the manual for long term non usage in 2001 The fuel was properly drained so we thought that this generator would be easy to get running We found that the air cleaner had disintegrated in LA s wonderful air and the generator would not start We verified that fuel was making it to the carburetor float bowl and I came in the next day with a spray can of starter fluid and verified that the generator would start and run with the starting fluid so it was clear that the fuel was not making it through the carburetor into the engine To make a long story short after buying replacement gaskets for the carburetor I pulled the carburetor off the engine disassembled it and found that the fuel main jet Figure 6 part 19 that supplies fuel from the float bowl to the carburetor throat was completely plugged After unplugging it cleaning the rest of the carburetor with spray carburetor cleaner and reinstalling the carburetor on the engine the engine started and ran perfectly Whew One down one to go W6VIO Calling Figure 6 EM2200X carburetor parts blowup The fuel main jet part 19 was found to be plugged likely dried fuel residue The main nozzle part 11 and pil
22. s and CAA 500 antenna analyzer Jim Marr will transport the materials for this team to the FD site for assembly by the team Team Chuck Sarture KG6NF amp Jorge Gonzalez KI6BJB Force 12 C3S 20 15 10m tribander and 80m 40m dipole All components will already at the FD site for setup by this team Team Mike Tope Walt Mushagian June 2014 K6DNS Bill Weber N6CI Elaine Chapin KJ6YYP Linda Taddeo KK6LEO and Jim Erickson N6PGC We hope that JPLARC members will come out and participate This is a great opportunity to meet new local hams and to get on the air with modes that you might not normally use Last year s FD with the PRC was a lot of fun and I expect that this year s will be even more fun Why not come out and see for yourself JPL ARC EmComm By Jim Marr AA6QI This month being ARRL Field Day month I thought that it would be worth talking about Field Day s Figure 12 relationship to emergency communications The regular thread of this column will pick up again in the next issue The ARRL web site characterizes Field Day as Field Day is part educational event part operating event part public relations event and ALL about FUN ARRL s stated objective for Field Day is To work as many stations as possible on any and all amateur bands excluding the 60 30 17 and 12 meter bands and to learn to operate in abnormal situations in less than optimal conditions In the event of a real wide area dis
23. t as an end in itself Figure 4 N5BF s EME Station Other technical games include frequency measuring tests ZRO test fox hunting via satellite Umbrella organizations such as AMSATs ARRLs TAPR WCWSS central states VHF and QRP ARCI cold sponsor such graded certification programs to promote these goals and identify talent and resources Courtney concludes that amateur radio is not dying out becoming obsolete or irrelevant only parts are But not this part We are limited only by our collective imagination As a 2014 epilogue Courtney mentioned that K6JEY s Sidewalk EME talk will be rescheduled noting that K6JEY does the sorts of things described in this talk using JT modes no CW or SSB but we ll talk about that someday 23cm EME at N5BE we ll talk about that someday too Significant progress in the last 8 years JT modes EME on the moon 24 7 other bands regular starts about 2005 Doppler OD on USRPs JPL Kempke Gustafson no known good new technical competitions Again contact Courtney to obtain a full copy of his presentation BOD Meeting June 6th By Jim Marr AA6QI Present Courtney Duncan NSBF Jim Marr AA6QI Steve Townes WB4ILW Phone Chris Carson KE6ABQ Walt Mushagian K6DNS 4 W6VIO Calling indicates a BOD member a BOD quorum was present requires 4 of the 6 BOD members to be present Meeting opened by President Steve Townes Committee membership
24. t you pay is the same either way Even if you are member who is just renewing doing so through the Club nets the Club 2 again without changing your costs at all To renew through the Club see Jim Marr who will help you with the paperwork don t worry it s really simple Thanks in advance for considering joining ARRL For Sale By Jim Marr AA6QI As reported in the February issue the JPLARC membership approved selling a number of JPLARC equipment items as shown in February s Figure 13 At the time of this writing only three items remain as listed below MFJ 8621 VHF Data Radio 2m 9600Baud with power supply and xtals for 145 09MHz which paired with a TNC and computer could give you a way to get on 2m packet radio This is still a current MFJ product that sells for 189 95 tax S amp H Brand new in original box Has crystals for 145 01 and 145 09 Asking 20 00 or best offer June 2014 Quantity 2 Cushcraft 13 element 220MHz Yagi Antennas Asking 40 00 each or best offer Your wants or gear for sale Send your listing to me Jim Marr via email or snail mail at 180 704 and I ll see that it gets into the next issue Future Meetings By Jim Marr AA6QI All JPLARC meetings are being held on non RDO Fri day s from Noon to 1 PM in 180 703C Call in is via MeetingPlace 818 354 3434 with ID 7373 Slides if any will be broadcast via http meetingplace jpl nasa gov also with ID 7373 Upcoming talks s
25. ubject to change June 20 Jim Marr AA6QI will lead the Field Day committee report final meeting before Field Day itself June 28th amp 29th Field Day with the Pasadena Radio Club WO6KA at the Art Center in Pasadena July 18 Field Day pictures and lessons learned discussion Initial planning for 2015 Field Day August 15 Gary Wong W6GSW will discuss the new 2 4GHz Broadband Hamnet formerly known as Ham Meshnet NEW September 26 Dr Doug Millar EdD K6JEY Sidewalk EME rescheduled from May October 24th Steve Townes WB4ILW Software Defined Radios amp introduction to the 2015 Officer Nominating Committee November 21st N5BF Bicycle Commute APRS amp Introduction of 2015 Officer Candidates December 19th Club holiday celebration at TBD Advertisements http www hamradio com The Burbank HRO store is offering a 5 discount on ham radio accessories to JPLARC members upon presentation of a valid JPLARC membership card
26. y Duncan N5BF filled in for Doug giving an outstanding presentation on Software radios and enabling technology for Satellite Space and Ultra weak signal applications This was a talk that he had given at an AMSAT Symposium in October 2006 that is still quite relevant today Even a compressed pdf version of the talk is too big to send via email so for anyone interested please send an email to Courtney and he can send you June 2014 the presentation via JPL s large file transfer tool The corresponding symposium paper is available directly from the author s website at http cbduncan duncanheights com HamRadio Dsp1 0 PhaseFive SDR_AMSAT_2006_Submitted pdf A brief summary of the presentation follows just to whet your appetite for asking Courtney for a copy Courtney began by asking What are Software Radios good for Why Bother His answer Audio filtering Speech processing Noise reduction sound card modes Modems Mod Demod schemes Software defined transponders arbitrary protocols adaptable ALE protocol Autonomy Ultra QRP RADAR Navigation direction finding For Courtney he wanted to get away from appliance type radios to have detailed control of the radio to have the construction experience and to explore unusual capabilities His adventure with the DSP 10 Figure 2 a mostly electronic not mechanical radio began with building a kit over the period 2002 to 2005 requiring about 5
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