“Mostly” Mojotone 5e3 Tweed Deluxe on test bench. Control knob interaction.

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This is a “Mostly” mojotone 5e3 build I made. I used Mercury Magnetic transformers, turret board, Jupiter coupling caps and Sprague Atom filter caps.
I’m running it thru the test tone paces at 1khz. I demonstrate the interesting interaction between tone and volume knobs.

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28 июл 2024

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Комментарии : 8

@mikoschannel6413 2 года назад

Nice and neat build. Well done. Your wiring is super neat. Looks like your output valves are mismatched though, looking at the way the sine wave breaks up very unevenly. Cheers for the vid.

@bobkraft9029 3 года назад

Nice job with the test. As far as voltages, Vrms = Vp-p * .3535 so your oscilloscope measurement of 18.9vp-p equals 6.68vrms so that was correct. However, if you were getting your 150mv reading from your waveform generator off your scope, then the actual rms voltage of your input signal was 53mv. The way the two volume controls interact in that circuit is just how you saw on your scope. Rhett Shull has a video about that with this amp on his YT channel.

@thomascoulter6121 3 года назад

Gorgeous wiring.

@tcarad2 3 года назад

Thanks! Clean wiring makes it easy to troubleshoot and fix too!

@mikekowalchuk6802 Год назад

Any tips for wiring? I'm about to wire up a 5e3 for the first time. Also, did you use solid wire?

@petedazer3381 4 года назад

Nice neat wiring job! You think those Astron caps really make that much difference? I built mine with the stock orange drops and it sounded fantastic.

@tcarad2 4 года назад

Probably slightly different but both will be good. (I use orange in other amps, they’re great.). It’s a matter of personal taste. I built another with their yellow “vintage” Jupiter’s. Different, but also just as good. Between the 2 I slightly liked red, so I built a 3rd with reds. But that’s just me. For an amp that will last 50 years, and takes many hours to build, the cost of parts to me is small.