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ok i had a look at the cathode resistor and it was far too large, there was was 270R in there. I put in a 180R (nearest i had) and it seems to have done the...
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Cheers for the help, ill get my multimeter out and check all the voltages, the dissipation should be about 10W right?
thanks
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EL84 Plate Voltage
Hi ive got a SE 5w amp using a 12ax7 and an EL84. It has always had rather harsh quite unpleasant overdrive with power valve OD, im playing around with...
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L-Pad attenuator
Does anyone know where sells the L-pad level controls in the UK?
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Thanks Steve,
I've done the full marshall gold mods from 18watt, changed the OT to hammond 125DSE, playing through a 1x12 celestion G12H. It...
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Valve Jnr EL84 bias..
After performing many mods on my VJ, im still dissappointed with the overdrive it produces. After a few resistor changes, the EL84 plate voltage is now just...
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Cathode capacitror / resistor frequency cutoff
Im modding my valve junior, with the main aim of getting nice crunchy OD and not the farty buzzy crap that it sounds like in stock condition. I know that...
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Thanks for that! i didnt even notice this resistor. Mine is the newer version as it has 4 filter caps, and doesnt hum !
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Valve junior filter cap help
I already posted a thread on the filter caps, but i need some specific info on the Valve Jnr. I opened up my combo intending to drain the capacitors, but...
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Filter cap voltage
When opening up an amp, can it just be left unplugged for a few days to let the filter capacitors drain this way, or would it take longer than that?
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safely run 8 ohm speaker off 4 ohm amp?
Quick question, can you safely run an 8 ohm speaker off a 4 ohm amp output, i read somewhere on the net that you can.
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Celestion G12H for valve junior
Hi im thinking about making a 1x12 extension cab for my valve junior combo, im going to add an 8 ohm tap off the transformer. I was thinking about the celestion...
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Ok thanks for that! I only know the basics of these things, just looked at loads of circuits of other amps and datasheets to compare.
Im a...
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Valve Junior Triode / Pentode switch
Hi im looking to add a switch to my epiphone valve junior to go between triode and pentode mode on the output valve, after looking at schematics for various...
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