Success - Up and running!

[drpastorbob]

Finished it yestreday. Today we used a variac to bring it up slowly and checked voltages, etc. Then we put in some old tubes and made some bad sounds until we fixed a few minor mistakes and connections (had to replace a bad micro switch).

I have attached a link to youtube showing an old guy (me) playing through a strat in the garage under flourescent lights. We can argue about whether or not it sounds like a dumble, but at least it made sounds.
Go to:
http://www.youtube.com/watch?v=1j8-egIZXHA

Now the real fun starts...tuning it up, etc...

[keithrick]

Congrats! It sounds a little muffled because of the camera mic, but I can hear some Dumble in der! Good luck with the tuning!

[Bob-I]

Congrats on the built. Nice to see another old guy building old designs

The tone doesn't sound like typical Dumble to me, but I also noticed you had the treble cranked. Most Dumble players keep the treble at more like 10-11 O'clock. Adjust it as you like it, sounds great.

[El_Martin]

Nice built, congrats!

now the tweaking starts...

What speaker are you using? I'd just check different speakers before tweaking...

Ciao
Martin

[drpastorbob]

When I posted about a week ago, we just got the amp up and running - no smoke and out came the sound (see video). Since then we have been trying to track down a low-frequency hum. I've check all the connections, the grounds, and cleaned up some of the caps, etc. to V1 and V2. I have not yet changed resistors to get V1=V2=200V. Any ideas to help me narrow it down? I also seem to hear some low-level "motorboating".

Thanks in advance.