Recent content by jaykay73

Best power amp ever? Selling my backup unit. Original build with volume controls at rear. 30W class A or 95W class A/B per side. Tubes fresh. Can send photos on request. Will arrange shipping anywhere at buyers expense but this bad boy is heavy so will probably most interest Australian buyers...

Thanks Dave, Which tube is the phase inverter? i.e. is the MV control before or after the phase inverter? J

Thanks MrMark, I know what a real attenuator is - I build custom attenuators as a side project. Your comments about loop attenuators are valid ONLY if the amp's master volume knob is in the circuit BEFORE the phase inverter tube - then the pot in the loop will be doing exactly the same...

Well, After six weeks of searching, reading and PLAYING I think I have worked out what this "send level" knob really does. It acts as a PRE phase inverter master volume control. What I have been doing is turning the R2 volume and gain near 10 and also the master volume near 10. I start with the...

Love my 3TMs as well... I have one with standard PS and two with the MDRT which have tighter gain structure (I run JJs in all). Not sure if those MDRT transformers are still available though. Have you checked out the NEW ada depot? J

Any assistance here?? I found a gut shot of a purple stripe to display the direct out wiring... Can anyone tell me the value of the resistor across the direct out pot to the direct out socket beneath??? Once I know this I can be on my way. Thanks, J

After more reading I think this is what I need to do... 1. Insert wire from presence pot to direct out pot. 2. Direct out pot value is 10K - Linear or log ??? Probably doesn't matter too much. 3. Insert wire from direct out pot to direct out jack. 4. Wire a resistor across the jack - this looks...

Correction... R130 is double stacked J

Lid came off easily to reveal the goods inside... At some stage the direct out knob was converted to a send level knob... A grey wire was soldered to R131 and the shield of this wire to the right of the adjacent capacitor... These wires were attached across the direct out pot - unsure if...

Thanks, Will post pics tomorrow when I get home. I have not read about this "loop send vol mod" before. Not sure if this was done at the factory. I'll be running my mk iii into my wet rack so I'd prefer to use a direct out which will be post-EQ. Also planning to move the front footswitch jack to...

Greetings, Bought a used red stripe, want to do the R2 mod but previous owner has made a few changes. The direct out vol knob has been converted to a loop send vol knob with a wire connected to R131 and the wires to the direct out jack have been disconnected completely. I need to have the direct...