Search found 5 matches

by Cephus
Mon Jun 01, 2009 5:48 pm
Forum: Technical Discussion
Topic: Shielding effect of chassis
Replies: 16
Views: 4585

Re: Shielding effect of chassis

So I am about to put my little amp all together in the chassis, but I have one remaining question. I made my own chassis and it has no underside (all the trannies mounted on top side). I was wondering if this will allow any hum from the trannies to get to my circuit or if I will be okay. I figure I...
by Cephus
Mon Jun 01, 2009 5:36 pm
Forum: Technical Discussion
Topic: Bedroom Practice Amp
Replies: 10
Views: 2892

Re: Bedroom Practice Amp

So, the affair started off in the kitchen and ended in the bedroom? 8) The kitchen table often makes for a good, er, work surface. :wink: As a ham operator (the radio type - no pork) :lol: I've often used cookware for a prototype chassis to troubleshoot and get the bugs out prior to building a more...
by Cephus
Mon Jun 01, 2009 2:09 pm
Forum: Technical Discussion
Topic: Bedroom Practice Amp
Replies: 10
Views: 2892

Re: Bedroom Practice Amp

Very kool I have three of tony's books and have eye balled this All American Four many times. So you found a suitable PT for that amp huh? Mark The PT is a Triad N-68X available for $11.20 from Mouser. It's a 120/240 / 120 50VA 50/60 cycle isolation transformer. The entire amp, including the series...
by Cephus
Sun May 31, 2009 10:52 pm
Forum: Technical Discussion
Topic: Bedroom Practice Amp
Replies: 10
Views: 2892

Re: Bedroom Practice Amp

stoo wrote:no o/p tranny?
Stew
Yes, on the finished chassis it is behind the 12AT6 tubes, in the prototype, it is on the underside.
by Cephus
Sun May 31, 2009 10:20 pm
Forum: Technical Discussion
Topic: Bedroom Practice Amp
Replies: 10
Views: 2892

Bedroom Practice Amp

This is a small bedroom practice amp I gave to a good friend of mine from the UK when we met up at the Dayton Hamvention in Ohio a couple weeks ago. I have scores of old AA5 radio tubes, and with help from Tino Zottola's books, I built what I believe to be a very nice practice amp. It uses 2 12AT6 t...