The Amp Garage

martin manning wrote: ↑Sun Apr 21, 2024 9:42 pm I'm a resistor heretic, though.

Beg to differ, asserting that skeptical schismatic would a closer positional descriptive.

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Thanks Ian --

Makes sense with your explanation. I'd asked mostly out of pure curiosity. However, few possible additions/tweaks from the Dumble recipe book might increase utility and novelty but leave that to you for further thought.

Best ..

Hello Ian — Well, I bit. The transformer actually is off on all the holes by about a 1/4” so I’m probably gonna have to move it over to make it work, but when I started reading about it, it sounded like it would be more utilitarian for my kid. If it were mine I would just keep it as is.. Anyway. Tha...

Hello -- Can you clarify which supplier of kit they used. If it is "premium" (e.g., Trinity Tweed) and you can roughly confirm any problems are assembly errors with nothing damaged but some 6V6 vs junk parts, $800 is about the threshold of reasonable pricing. https://www.trinityamps.com/product/twee...

Hello again -- Hello -- Wondering what type of tube is presently installed in the PI position? Either V4 or V6 depending on reference schematic. Best .. Ian Ian! My dear old friend Ian McClagan would say "Us Ian's gotta stick together!" so passing that down the line in his honor. I have 2 old stock ...

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...