The Amp Garage

Hello --

Wondering what type of tube is presently installed in the PI position? Either V4 or V6 depending on reference schematic.

Best .. Ian

No 'half-wave" -- Output of each PI triode is a full wave, just that they have inverted relationship; and it's the power stage that due to bias etc that divides the work into AB push-pull ..

helo -- Thank you clarifying my posting Martin. I do this only occasionally, and still perhaps more often than really necessary. Since a few usefully sized power supply dummy-loads are there in my toolbox, it takes just a moment to clip in and test voltages and more before moving on. If the schemati...

Helo --

Gibson built stereo guitars, and to accompany also made the GA-83S Stereo-Vib and the GA-79RVT. Magnatone after the 480 etc., also built the M14, M15 and M15a in the mid '60s.

Curious, like others here, what you meant by "feed a speaker a half-wave signal".

Best .. Ian

Hello -- Testing is doable and recommended. A suitable dummy-load power resistor is needed. As an example, for testing mid-level Wattage amps that have a single conventional tube rectifier socket I cobbled an octal plug with a string of small power resistors, as shown here in the first post of :: ta...

I haven't even started yet but I wish to start soon. I've checked the Rocket files page but it seemed like the files and infos are quite old. I have tried e-mailing rj but I got no responses. Thanks for the reply btw The era when RJ and others were actively supplying and supporting Trainwreck repro...

:x Atypical brevity sir .. I apologize. I didn't mean that as a reaction to your post. I just got frustrated trying to do the full YouTubes thing. Big fingers little phone Was curious, now simply sympathetic. This board web interface is not small screen friendly though better than tapatalk's apps. ..

cbass wrote: ↑Tue Mar 26, 2024 12:49 am

Atypical brevity sir ..

Hello --

For the truly interested it seems at least some of the images posted via "http://www.thehomepaintingco.com/" have been archived at the wayback machine.

https://web.archive.org/web/20150627011 ... Wreck1.JPG

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Hello -- My project is a single ended amp, so no PI. I don't know if I'll miss it since the Dumble power amp is pretty much a clean Hi-Fi type. It's a bit of an experiment, so I'll just have to see how it turns out. The preamp is a copy of my 100W low-plate, so it will be interesting to see how much...

Hello — The simple answer to your question should be clear by now. Nope. Looking for a not-too-loud and early break-up sound. Buy a Deluxe or Princeton transformer set, plus a Princeton or Deluxe chassis; and follow more or less directly Martin Manning’s Deluxe build thread. Depending on goals and f...

Series connected pairs run well on 12.6V.

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NE572.

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Do a search on “mullard triode flash” and read up about the wide observations that this is typical and believed benign.

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Don’t put too much into that particular spec ..