The Amp Garage

Sorry. Could this be deleted?

Would leaving the heaters the way they are be an issue? Nope! Heaters can stay as they are unless you're getting 60hz hum. It's possible it'd be quieter if you redressed the heaters to make use of twisted pairs on tube I'm suggesting be reassigned to become V1 (assuming you keep the "V0" assignment...

I came across this video on Youtube and thought this group would appreciate it. Cool story about one of one of his amps and the man himself

https://www.youtube.com/watch?v=J5crA4bqLv8

Cool build! With this unpleasant sound persisting despite fairly large grid stoppers that large all around, I'm wondering if this is blocking distortion versus an inaudible oscillation. I'm particularly concerned because of the layout of the first three gain stages being crammed so close together. ...

If I was experiencing this and I needed to begin troubleshooting I would be looking at a schematic of the circuit to see where the issue could possibly be coming from. I know that's not what you want to hear but I sketch out everything I build or modify as it's the only way to keep track of the sig...

I replied in the thread over at gear page. Sounds like you're missing a grid leak somewhere in the preamp or a stage is being driven too hard. 56K grid stoppers on the output are massive! Usually people go lower to 1.5K. Theey were 5.6K so having 56K is not the issue. From the Aiken site "Depending...

I just changed the grid stoppers on pins of of he power tubes from 5.6K to 56K and still no dice. I am at a loss. The amp works better, less cutting off but not the volume or girth I'd expect, with the preamp gain set higher for some reason. I would expect that to be the opposite. I move this up to ...

Hello! I built a 2204 with the intention of applying the SIR #36 mod. The 2204 worked perfectly so I know I was starting from a good point. Not all of the schematics/layouts were exactly the same but in the end I went with this one. Only difference is that on V1b I'm using .68/2.7k and for the extra...

Thank you! I ended up finding a 16u 500 F&T in my stash. Larger than I planned for but I found a nice spot on the side chassis wall.

One last question. What would the minimum voltage rating for this cap? I just realized that the one I have is 25v

Thank you both!

I'm modding a 2204 clone to #36 and I have a question about this 16u cap. I only see the cap in this layout, but not the schematics. What does it do and if its a good idea to include this, do you think 10u or 22uf in place of 16u would do fine? I don't have a 16u :) 36levispecs bigger pic.jpg Screen...

Very nice! It looks like you have 2 x 22M resistors on your treble to mid switch...one on the pot and another on the relay card (I can see 2 resistors there(so 3 x 22M in total)). You only need 1, I usually just put them on the relay board and leave it off the treble pot. Regarding the power and st...

I just wanted to post some final photos. I replaced the mid switch with the correct on-on type, and rewired the PAB/OD switches. These were wired backwards because I followed the layout that used a slide switch. Oh, and I also changed the power/standby switched. The originals were bulk ands ugly, an...

Actually, I was wrong. Both rear switches are working in reverse so I will just rewire them. If anyone sees anything in the photos that I should changes, esepcially related to lead dress, please let me know. I was thinking of going back through the amp and shortening any leads that I could. My initi...