The Amp Garage

Hoping for some input. This amp sounds very nice. After some lengthy playing time, the volume will drop substantially. Fire it up the next day and all is well for an hour....then the volume drop happens. Can someone advise a methodical approach to a paint by number guy :roll: to determine the cause?...

Thank you all for the assistance.....Martin..I tried a better meter and the voltage in question is now 18.1! The old meter still reads it at 3.4. The resistors check out.
Now on to the dead inputs....

Hope this helps.

Oh, yeah. It works. It’s seems hot, but everyone else seems to think the excessive heat is normal. I haven’t played through it for very long, though. Just fou d a second issue.....only the first input works :evil: . All the jack wiring checks out. And everything else.... I would like to correct the ...

.....and yes, I will button up the disasters!

Yes, it needs cleaning up.

Oops....45.1 and 40.5. Last post was voltages from the 4.7k between B+1 and B+2. Sorry.

Those voltages are 409 and 358. I thank the brain trust for this input!

Tried swapping a couple different sets of tubes......no luck. Fred, you said that you had the same voltages....do you still have 3.? Instead of the documented 21.58?

I do not have a master volume. (Yet) I followed M Hartman’s layout.

The jumper from the 1M/3.3M intersection goes to the top of the .022. I have 3.4V there also.There is nothing from the .022 to the 100k. I don’t see it on the layout.

Novice newbie here....please go easy on me. Built a TweedleDee Deluxe with the great information available here. I don’t understand schematics and used the layout that’s here. She’s running. Voltages are very close to what was posted on CW’s documentation. Except for one. At the intersection of the ...

......a sub forum for amp newbies (like me) that can deal with some of the amp "issues" you pros don't necessarily like dealing with in the existing forums? A lot of this stuff is over some of our heads, at least my head, and this site is very civil; we could get answers to questions "broken down" a...

Any indication of the shipping costs?

Here's Emmy Pro #257; the OP amp. Just as I received it.