The Amp Garage

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Hi. I was strugling with this reverb for a while but now after few changes I really like it. I changed reverb to 8AB2A1B and this was a huge improvement. 10thTx You were right from the start my long tank was faulty - It worked but one of the springs made strange quite sitra distorted sounds. But I h...

Cool. Try it and let Us know what You think. I really dig this amp - especially clean in SE - Very clear 3D sound ;-). I made few mods as tweed royal. Cut is particularly helpful. Other mods EF86, one tube reverb, No load tone, low b+ switch. I couldn't get those special pots as tweed royal. So I us...

I built one 2 months ago. Tweedle dee design with both PP SE transformers as in byoc. Works great - I like SE a lot in this design. Instead of rotary switch I used 4pdt switch and standby.

Ok will check it. I was expecting a socket but I have beltons so i rule that out. Once during tests something strange happened for few minutes. I was taping on heaters wire and could hear this taping in reverb sound from speaker-only heater wires next to reverb tube. Than small crack sound and it di...

I changed all ( wires, resistors, pots, capacitors, tubes, grounding, B voltage) that could cause this problem except socket. Will have to order some more and give it a try. Putting grid resistor like 200k reduced distortion but weaker reverb. With lower B+ like 80V (few days ago I install a switch ...

Old reverb tank. I tried 1M resistor and no change. I disconnected tank, reverb transformer, B+ as on schematic and still problem remains - I think that this circuit is somehow effecting cathodyne PI but don't know how. (and if it can be fixed) I did few tests last week. And when I disconnected reve...

HI. I was trying to solve this problem for a while now. (fixed small oscillation but not main issue) I disconnected few wires and what is left on schematic still causing problems. If I remove ground from reverb driver cathode resistor - dwell doesn't effect sound. I replaced all components in this s...

Did some more tests. I pluge guitar to recovery- can play but not very loud using 12u7. Change to 12x7 and its louder lets say bedroom volume. I connected tank to make some crashing tests with 12ax7 it's louder but nothing disturbing. I play with dwell a bit and than it happened. Oscillation with dw...

Thanks 10thTx I will chack it. I will look under the turret board tommorow if all fine new tank it is. I took the tank out hiting strings make a small sound. Hopfully I did some stupid mistake - if its tank i would be MAD

I will check recovery reverb triode with my guitar - will see if it works

Thanks I did change mixing resistor from 100k ;-) to 330k this improved loudness of reverb and distorted sounds. Banging reverb - Can't hear a thing Droping amp on a floor - can hear springs a bit Droping amp on a floor harder - springs hits cabinets bottom ;-) quite sound from speaker I did listen ...

Hi.
Still trying to solve it. I did check volteges in my amp. With reverb tube
all valeges after first 4k7 resistor drops 30V. So
B+ 380 Screens 330 B3 311 - without reverb tube
B+ 380 Screens 300 B3 280 - with reverb tube

Sorry to bother you guys but is it normal?

I can't find any mistakes - but am sure there are some. I checked wiring few times and for now everything seems fine. I tried diffrent grounding schemes. I can control those distortion quite well while playing. With dwell under 7 I have to hit strings quite hard to hear those unwanted sounds. For no...

I tried few things 1.Connected speaker to reverb transformer - (funny that you can play like that) Distortion is still present, but now i will redefine it to harsh sound under normal sound 2. change reverb tube to 12au7 still harsh sound 3. grid resistor to pin 2 of reverb - no change 4. Tried both ...

Yes sluckey You are correct
Without reverb tube dwell doesn't change sound