Handbook - Sheldon Amps
Contents
1. You will be surprised just how loud and proud18W can be The TT4 can be an educational experience The TT4 can be fitted with a range of Sheldon 6V6 s 6L6 s or EL 84 s depending upon which style you prefer Simply chose the grade of Sheldon valves which suit your playing style and your dealer or the factory will get optimum performance from the chosen set Then when you wish to replace them simply use the same grade of valve and no further adjustments will be necessary Should you wish to change the grade of valve used then ask your dealer or the factory to make the very simple adjustment Front panel controls e pet standard input using a single jack socket o lume controls the input gain level set low for a clean sound and higher for more overdrive e Compas This will take you around the tonal spectrum from resonant deep lows towards the West and beyond to singing highs towards the East This is easily the most effective tone control available today In a live situation this amp will get you there quicker Preege This allows you to dial in 9 18 Watts by using one or both output valves Waser Takes the output of the amp and changes nothing throughout the volume range leaving your tone intact e Celestion Fane or other OEM Driver as required Rear panel controls e All valves fuses mains inlet and operational switches are easily accessed and labelled at the rear of the unit via the rear panel for fast an2. a tube glove or other blunt instrument if time is an issue e With the rear panel removed carefully take out the output valves fitted Do not use a twisting motion as this will damage them e DO NOT REMOVE THE AMPLIFIER FROM THE CHASSIS FOR ANY REASON APART FROM EVERYTHING YOU MIGHT DO IN THERE YOU MAY INVALIDATE YOUR WARRANTY e Carefully fit your new selected set of Sheldon valves being careful to note that the locating pip on the valve base is aligned with the slot in the centre hole of the valve base Push the valves firmly and fully home Excessive force should not be required nor applied If it is then something is wrong and the alignment may be incorrect 5 Issue 6 1 2 2007 On the rear of the amplifier there are two red test point sockets marked 7P and 7P2Z and one black socket which is connected to ground You will be measuring a voltage between each of the red test points and the black ground socket Put the BLACK or COMMON probe of your multimeter into the BLACK socket on the rear of the amplifier Then put the RED test probe into the RED test point marked 777 This will indicate the bias setting of the left hand pair of valves as viewed from the rear Repeat this process for the right hand pair and off you go Both values should be identical To do this first use the Kange to get to the figure amp the Balance pot to get the values equal REMEMBER do not exceed the top value in the range It may sound hotter but it a
3. cause beyond the control of Sheldon including but not limited to any malfunction defects or failures caused by or resulting from the unauthorized service accidents abuse neglect loss of parts lack of reasonable care incorrect use or failure to follow instructions incorrect line voltage damages resulting from improper packaging improper maintenance modification or repair by the user fire flood or other Acts of God 4 This warranty shall not apply to vacuum tubes fuses or any loudspeakers or horn drivers that have been damaged due to thermal destruction or physical destruction by this unit The foregoing is in lieu of all other expressed or implied warranties and Sheldon does not authorize any party to assume for it any other obligation or liability In no event shall Sheldon be liable for special or consequential damages arising from the use of this product or for any delay in the performance of this warranty due to causes beyond our control Some states territories do now allow limitations on how long an implied warranty lasts and or do not allow the exclusion or limitation of consequential damages so the above limitations on implied warranty and consequential damages may not apply to you This warranty gives you specific legal rights You may have other rights that vary from state to state territory 11 Issue 6 1 2 2007 LELLLLS SASL SSS SASS SSS SS AAA SSSA AAA SSS AAAS SSSA SSSA S SSS SS SSS SSS SSS SSS Cottificete of C
4. PLONE I About your i netone Amplifier The 7eTine range is a hand built high quality range of all valve amplifiers originally designed for the discriminating Blues Rock guitarist They are however extremely versatile and can fulfil a range of roles from country clean to rock via jazz blues and all points in between All amps in the range benefit from an unprecedented Unlimited Lifetime Warranty the ueTone The TT1 range are 35 50W class AB amplifiers that give the player an unprecedented ability to tailor their own sound by selecting the type of output valve used in the amplifier and a choice of two pre selected factory set pre amp configurations one HOT one COOL We deliberately chose this path to get the best tone performance and long maintenance from the amp The output section can be selected by the player to suit his own style This can be done by either the factory dealer or even easily by the player themselves simply by following the simple procedures set out in this handbook giving a freedom of choice rarely encountered in other amplifiers Front panel controls Apex standard input using a single jack socket e lume controls the input gain level set low for a clean sound and higher for more overdrive e Compas this is a variable tone rotary set at North it will not overly emphasise any particular frequency Heading SW will bring in a little sparkle heading SE will bring in sparkle and grind with an e
5. and mellow Waser The master volume is a subtle but effective variation on the standard type used in most guitar amps and uses a technique called Boot strapping to increase the apparent impedance of the control pot used This has the benefit of reducing the tonal change often associated with Master volume controls on low settings Although part of the power amp for maximum effectiveness the master is not included in the feedback loop as in some designs Keady This is the power switch and turns on the amplifier e of This is the amplifier stand by switch and can be set to off when the amplifier is on but not in use for longer periods This can lead to longer power valve life Rear panel controls e Mains inlet A standard IEC connector allows connection to the mains supply e Voltage selector Allows a choice of mains input voltages either 230v or 115v NOTE for UK use this must be set to 230v e Mains fuse This is a 2A slo blo 20mm fuse UK only e HT fuse This is a 500mA slo blo 20mm fuse UK only o Triode Perxtode This switch configures the output valves to either full power pentode mode or half power triode mode In triode mode even harmonics are emphasised and will give a sweeter and rounder overall tone e Impedance selector Allows matching to the correct impedance of the cabinet to be used e Speaker outlets Two parallel wired jack sockets are provided to allow more than one cabinet to be used e Bias co
6. d trouble free maintenance e Optional Effects send and return and Reverb controls 10 Issue 6 1 2 2007 Product Warranty User Agreement Subject to the Obligations and Exclusions listed below Sheldon warrants this product against manufacturing defects in material and workmanship to the original owner and all subsequent owners Obligations 1 This warranty will be honoured only on the presentation of a copy of the invoice or bill of sale as proof of purchase 2 Transportation of the product to an authorized service facility or Sheldon is the responsibility of the user Sheldon shall supply all parts labour to affect warranted work at no charge and payment for return carriage will be the responsibility of the owner in all cases and without exception Limitations of Implied Warranty ANY IMPLIED WARRANTIES INCLUDING WARRANTIES OF MERCHANTABILITY FOR A PARTICULAR PURPOSE SHALL BE NEITHER EXPRESSED OR IMPLIED Exclusions 1 This warranty shall not cover adjustment of customer operated controls or products that have been altered replaced or have missing or defaced serial numbers the appearance of accessory items including but not limited to cabinets cabinet parts covers footswitches or knobs 2 This warranty shall not apply to unpacking setup installation or removal and reinstallation of products for repair by authorized service personnel 3 This warranty shall not apply to repairs or replacements necessitated by any
7. e tone 4 x Sheldon EL34 45 50W Even more of that Classic Brit rock tone But with more headroom Like a 100W plexi but at 70 80 mV_ 50w volumes More of that great 6L6 tone Better headroom very suited to the clean 4x Sheldon GLGiSss ASPON blues player but will break up very nicely when pushed moving into a smooth driven tone 70 90 mV 2xSheldon 6L6 35 40W A best of both worlds combination The clear top and bottom of the 6L6 s complementing the smooth creamy break up of the 6V6 s 2x Sheldon 6V6 45 55 mV_ gives probably the best blues tone you will hear The ultimate in solid bass and crystal clear 2xSheldon KT88 6550 45 50W highs late break up but boy when it does For the cleaner style of playing this is probably 55 60mV_ one of the best set ups Choosing your output configuration has never been easier or more versatile The TT1 gives the player a wider choice than previously available in all but a very few amplifiers and puts the power of choice in the hands of the player or tech 4 Issue 6 1 2 2007 Biasing your 777 amplifier To get the best performance from any amplifier it must have its output section correctly biased Our amps use fixed bias to put the player and technician in control of the valve The bias of the output valves is vital in deciding not only the operating class of the amplifier but also in maximizing performance tone and valve life Ours is by far the better option between ca
8. en used in conjunction with our forthcoming adaptor module or powered cabinets the amp can be turned into a super pre amp chain for use with larger amps Optional reverb controls are accessed from the rear panel The TTJunior has the following standard features e 12BH7 output section for cranked power amp overdrive at 1 watt e Cathode bias e 1x Sheldon 12AX7 preamp Similar to the TT2 and TT3 but maximized for a little more drive tone e Unique Compass control for maximum tone choice Maser control allowing quiet cranked amp tone at all volume levels e Ultra fast rectifier diodes with special noise reduction circuit to ensure maximum response and quiet operation e Eyelet board construction with thick Glass epoxy circuit board for a super tough construction Custom hand wound transformers Specially selected Sheldon valves Celestion Vintage 10 speaker Attenuated line out located on the rear panel 9 Issue 6 1 2 2007 The rueTone 4 The TT4 is an 18W Class A blues monster Designed for use in smaller venues and studios for Harp Pedal Steel Acoustic Guitar the TT4 is a big amp in a compact package Whilst most available amps in this class claim to be class A in reality most are simply hot cathode biased class AB amps for a more detailed explanation see our web site at www sheldonamps com The TT4 uses a cathode bias design to optimise the characteristic tone that is required for a dedicated amp of this type
9. l Perfect for those late night bedroom moments of inspiration to being able to get a full throated sound in the studio or practice room with out losing any of that precious tone The Compass control is a unique and amazingly wide ranging tone control that can take you from deep resonant lows to needle sharp highs with the turn of a single control We are confident that it is the widest ranging single tone control you have ever heard Gain and Master control let you tailor the TT3 s tone from clean to mean and beyond A further feature of these amps is that when used in conjunction with our forthcoming adaptor module the amp can be turned into a super pre amp chain for use with larger amps Optional reverb controls are accessed from the rear panel to the left hand side The TT3 has the following standard features e 12AU7 output section for cranked power amp overdrive at 1 3 watts e Cathode bias allowing the option of fitting a range of different output valves 12AT7 12BH7 etc e 2x Sheldon 12AX7 preamp Similar to the TT1 and TT2 but maximized for a little more drive tone 7 e Unique Compass control for maximum tone choice Freee control enables a choice of output power tone and style From 1W in SE mode to over 3W in PP mode e Master and Gain controls allowing quiet cranked amp tone at all volume levels e Ultra fast rectifier diodes with special noise reduction circuit to ensure maximum respon
10. le amps in this class claim to be class A in reality most are simply hot cathode biased class AB amps We decided to set the record straight and tell things the way they really are Let your ears be the judge don t let class prejudice get in the way of good honest tone The TT2 uses a combination of fixed bias and cathode bias Unlike most other amps which go for cathode bias when using these types of output valves So why be different Well whilst cathode biased amps can sound very sweet in some cases particularly with EL84 s they can get a bit muddy sounding when driven to their limits Fixed bias lets us get the most out of them squeezing every last bit of tone out and making the most effective use of the available power The TT2 can be fitted with a range of Sheldon 6V6 s or 6L6 s depending upon which style you prefer Simply chose the grade of Sheldon valves which suit your playing style and your dealer or the factory will adjust the bias to get optimum performance from the chosen set Then when you wish to replace them simply use the same grade of valve and no further adjustments will be necessary Should you wish to change the grade of valve used then ask your dealer or the factory to make the very simple adjustment Front panel controls e pet standard input using a single jack socket lume controls the input gain level set low for a clean sound and higher for more overdrive e Compas This will take yo
11. lso has higher voltage Use the Kange pot also to determine how cold you wish to run the amp For example at the bottom of the table value or below is where your amp will run coldest If you prefer this then you can do no real harm Let your ears decide Reconnect your TT1 to the mains AT NO POINT SHOULD YOU NOW TOUCH THE OUTPUT VALVES OR ATTEMPT TO TOUCH ANYTHING NSIDE THE AMPLIFIER ITSELF Switch on the Keady switch located on the front panel You will see the heater filaments inside the valves begin to glow Ensure that they are all on And allow them to warm up for a few minutes Now switch on the s switch located on the front panel You will notice that you now will get a reading on your multimeter Allow a few seconds for this to stabilise IF AT ANY POINT AFTER SWITCHING ON THE YOU SEE ANY GLOW ON THE MAIN PLATE STRUCTURE WITHIN THE VALVE OTHER THAN THE HEATER FILAMENT DOWN BIAS TO RUN THE VALE SET COOLER OR SWITCH OFF THE AND TALK TO US OR YOUR LOCAL TECHNICIAN 0eceesseeeeeees IMMEDIATELY 6 Issue 6 1 2 2007 The ruefoned TTSpecial ll TT Special Plus W The TT2 and the Special and Special Plus are 18 35w class AB blues monsters Designed for use in smaller venues and studios they are a big amp in a compact package The difference is that the TT2 is only available in the larger volume cab sizes whilst the Special and Special Plus are in the TT3 size box and are plus Reverb Whilst most availab
12. mphasis on the upper mid range and it will also boost gain slightly e gh Controls the high frequency content as in a normal treble control but with a much wider response Middle Controls the middle frequency content With the middle control set low or off the tone controls are voiced to be able to give a similar response to the fabled clean tone of a blackface Fender with more Mids introduced as the control is increased With the middle control set high the response is more Marshall like e jew This controls the low frequency content again with a much wider response than conventional guitar amp tone controls e Special Sauce With the accompanying footswitch or the panel mounted switch which both select this feature this control gives a boost by lifting the tone stack from ground via a potentiometer this allows a pre set level boost that can be used for soloing A LED beneath the control and on the footswitch indicate when this control is active Plugging in the footswitch bypasses the panel mounted switch With the control set fully clockwise the tone controls are effectively bypassed and the natural tone of the amplifier is dominant This can be fine tuned using the compass and freeze controls which remain in circuit 2 Issue 6 1 2 2007 Preege Essentially a hi cut control which is located within the power amp section and can be used to tailor the overall high frequency response of the amp from icy sharp to smooth
13. ntrols Two test points allow monitoring of the bias levels of both sides of the push pull output circuit using a simple voltmeter The centre ground connection allows a meter to be connected between the cathodes of each side of the push pull output section power valves TPI amp TPA and ground across a 1 ohm resistor This will indicate in millivolts on a test meter what the bias current flowing through each side is This can then be adjusted by using the Kange and Balance pots located beneath the test points A more detailed procedure is set out later in this user manual e Footswitch The supplied footswitch is connected here and selects the Special Sauce feature Any two connector cable such as speaker cable can be used here as no audio signal is present e Optional Effects send and return and Reverb controls are located on the rear panel 3 Issue 6 1 2 2007 Table 1 The following table shows the available options for the TTTs output section Output valve configuration Output power Characteristics amp Voltage Settings Sweet clean tones which move easily into a Aa Snad ONS SW super creamy overdrive So nice it s what the 40 42 mV amps come with as standard Characteristic British rock blues tones with exchelgon BEIA AOSAN crisp highs and plenty of midrange grit and 30 35mV grind 2xSheldon 6L6 5881 40 45W Sweet chiming clean tones with solid bass and 35 45mV top end More detail in the tone and a smooth overdriv
14. se and quiet operation e Eyelet board construction with thick Glass epoxy circuit board for a super tough construction Custom wound transformer Specially selected Sheldon valves Celestion Vintage 30 or Greenback speaker Reverb on TT3R 8 Issue 6 1 2 2007 The 7 Amor Don t be fooled by the simple control layout there s an amazing range of sounds in there just waiting to get out Every turn of each control can yield a new sound by setting the controls anywhere It may be the baby of the range but it s an amazingly versatile and tone full tool The TTJunior is unique in using pre amp valves throughout its construction The output section uses one cathode biased Sheldon12BH7 valve One Sheldon 12AX7 fulfils pre amp duties Perfect for those late night bedroom moments of inspiration to being able to get a full throated sound in the studio or practice room with out losing any of that precious tone The Compass control is a unique and amazingly wide ranging tone control that can take you from deep resonant lows to needle sharp highs with the turn of a single control We are confident that it is the widest ranging single tone control you have ever heard We have introduced some extra grind from NE to SE for that Rock moment Separate Line out and volume control let you use it in the front end of another amp or for direct into a DI box Mixer for live and recording without a safety net A further feature of these amps is that wh
15. thode and fixed bias Without question The TT1 is a class AB amplifier and can be biased over a range of settings depending upon the type of output valves selected and the tone desired All 7rueTone amplifiers are fitted exclusively with Sheldon valves which in themselves can be selected for the type of tone required To bias your TT7 you will need e A digital multimeter set to mV A trim tool or small flat bladed screwdriver we can supply the correct tool Your brain in gear or the number of your local tech Us on the other end of the phone CAUTION VALVE AMPLIFIERS CONTAIN HIGH VOLTAGES WHICH CAN BE FATAL WHILST BIASING YOUR TT1 IS NOT IN ITSELF DANGEROUS ALL INSTRUCTIONS MUST BE FOLLOWED CORRECTLY AND CAREFULLY The first step in biasing your TT1 for best operation is to select the desired valve type 6V6 6L6 EL34 etc Then chose the grade of Sheldon valve These range from 1 to 10 with 10 being hot and giving early distortion and 1 being cooler and moving into power amp distortion much later Now follow these steps exactly e ENSURE YOUR TT1 AMPLIFIER IS SWITCHED FULLY OFF AND DISCONNECTED FROM THE MAINS SUPPLY e From the table chose your desired output section configuration 2x 6L6 4 x 6V6 etc then look up on the table the correct bias setting e Allow your amplifier to cool right down if it has been in previous use VALVES GET VERY HOT IN USE AND CAN BURN YOUR FINGERS IF TOUCHED However you can use
16. u around the tonal spectrum from resonant deep lows towards the West and beyond to singing highs towards the East This is easily the most effective tone control available today In a live situation this amp will get you there quicker Pecepe This allows you to dial in up to 35Watts by using one or two pairs of output valves e Waser Takes the output of the amp and changes nothing throughout the volume range leaving your tone intact Rear panel controls e All valves fuses and mains inlet are easily accessed at the rear of the unit via the rear panel for fast and trouble free maintenance e Optional Effects send and return and Reverb controls 7 Issue 6 1 2 2007 The ruefone J Truetone A If there ever was an amp that you couldn t quit playing then this is it Don t be fooled by the simple control layout there s an amazing range of sounds in there just waiting to get out Every turn of each control can yield a new sound and setting the controls anywhere will give a useable tone full sound The TT3 is virtually unique in using pre amp valves throughout its construction The output section uses three cathode biased Sheldon 2AU7 valves with option of fitting 12AT7 s or 12BH7 s for a different tone and output volume A pair of Sheldon 12AX7 s fulfils pre amp duties Using the Freeze control you can go from 1W in single ended mode to just over 3W in Push Pull mode and all points in between using the rotary contro
17. unership You are now the proud owner of a Sheldon Amplifier We all wish Yuu well with Your product and extend thie gen invitation Co contact as direct if you have any questions or issues which you feel we could help you with lt is only with the continued support of you our customer that we continue to grow and develop and we thank you for that opportunity baie From us all Sheldon Amplification Birmingham England B26 3PN Tel 44 121 743 1504 Fax 44 121 246 8887 Email info sheldonamps com www sheldonamps com First User Serial Number SPPLLLLEDSSS SSA ADS SSSA AAAS AAA AAA AAA ADS ADA ADDS SD AAD SSD SD AAAS PDS SSDP Digigit Y NANANANANANANAAAAAAAAAARARARAAAAARARARAAAAAARARARARAAA AAA AAA AAA AAA AAA AAA AAA AAA AAR ANARAAAAS Sheldon Amplification 2007 Please note that any specification may change at the discretion of the company without prior notice Unlimited Lifetime Warranty is subject to activity undertaken within the manufacturing process and within the current specification Any use found that is not as intended any third party intervention with parts or process outside specification will cause the warranty to be invalid without further reference to the company 12 Issue 6 1 2 2007
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