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![[Linked Image from i.imgur.com]](https://i.imgur.com/EW9HrIJ.jpg) The amp chassis has been setting on my desk for over a year. I played it for about three minuits after I built it. The amp sounds good but I want to add a bet of better bass response. One channel needs work and the pilot light is not working. No big deal to fix. Well, I am not sure how to change up the tone control. It is more or less a Supro circuit and I don't think I ever drew a schematic. Lots of music stuff has been setting on hold. I looked at my Native Insturments account and found a software program I paid $599.00 for that I did not remember buying...lol The guitar skills are returning slower than the piano skills. Two things...don't get old and don't stop playing!!! Cheers, Billy EDIT: Thhe schematic is here on the forum at https://www.pgmusic.com/forums/ubbthreads.php?ubb=showflat&Number=771479&Searchpage=1&Main=101965&Words=supro&Search=true#Post771479Any of you electronic guys could look at the schematic and recommend changes to produce more bass.
Last edited by Planobilly; 12/02/24 04:55 PM.
“Amazing! I’ll be working with Jaco Pastorius, Charlie Parker, Art Tatum, and Buddy Rich, and you’re telling me it’s not that great of a gig?
“Well…” Saint Peter, hesitated, “God’s got this girlfriend who thinks she can sing…”
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That's a clean looking amp.
I've got a box of parts including the power and output transformers for a 50w project guitar amplifier. Maybe one day I will get motivated.
Swap out that .005uf in the tone circuit. That would change the tone response. I'm not sure if larger or smaller would have the desired effect but try each and go from there.
You can find my music at: www.herbhartley.comAdd nothing that adds nothing to the music. You can make excuses or you can make progress but not both. The magic you are looking for is in the work you are avoiding.
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That's a nice looking cabinet you dropped your chassis into. Love the look of uncovered wood...
DC Ron
BiaB Audiophile
Presonus Studio One
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Too many guitars (is that a thing?)
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Back at the boat f or a few days
Yes, Herb, the cap change should do the job
I had some leftover white leather which I think looks good with the Oak wood with just some oil
The amp will likely never leave the house
Hopefully I will catch a few Wahoo
“Amazing! I’ll be working with Jaco Pastorius, Charlie Parker, Art Tatum, and Buddy Rich, and you’re telling me it’s not that great of a gig?
“Well…” Saint Peter, hesitated, “God’s got this girlfriend who thinks she can sing…”
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Back at the boat f or a few days
Yes, Herb, the cap change should do the job
Hopefully I will catch a few Wahoo What goes on inside Billy's mind, while he thinks seriously about changing that tone capacitor  : ![[Linked Image - Only viewable when logged in]](https://www.pgmusic.com/forums/ubbthreads.php?ubb=download&Number=29285&filename=2024-12-04_19-33-06.jpg)
BIAB & RB2025 Win.(Audiophile), Sonar Platinum, Cakewalk by Bandlab, Izotope Prod.Bundle, Roland RD-1000, Synthogy Ivory, Kontakt, Focusrite 18i20, KetronSD2, NS40M Monitors, Pioneer Active Monitors, AKG K271 Studio H'phones
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I caught one of those once, up the west coast of Mexico, about 1 hour north of Puerto Vallarta. It took me 30 minutes, and my hands were bleeding, but dayam, was it fun.
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<...snip...>Two things...don't get old and don't stop playing!!!<...> I can't help the aging process, but so far I haven't stopped playing. No retirement plans for me as long as someone will hire me, and my calendar is still full. Sorry, I don't remember enough about the electronics I learned in school to help with the bass response. BTW, the woodwork looks really nice. Notes ♫
Bob "Notes" Norton  Norton Music
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Swap out that .005uf in the tone circuit. That would change the tone response. I'm not sure if larger or smaller would have the desired effect but try each and go from there. That one will change treble response, not so much bass response. I'd increase the .005 coupling caps before the volume controls, currently they're creating a high pass and increasing the cap will lower the frequency.
I work here
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Swap out that .005uf in the tone circuit. That would change the tone response. I'm not sure if larger or smaller would have the desired effect but try each and go from there. That one will change treble response, not so much bass response. I'd increase the .005uF coupling caps before the volume controls, currently they're creating a high pass and increasing the cap will lower the frequency. There's actually quite a strong high-pass character in the amp. It looks like around -10dB at 100Hz. As Simon moots, maybe increase the .005uF coupling caps in the first stages to perhaps 0.1uF and the two 0.1uF coupling caps to the output pair to 0.022uF. That should bring the 100Hz figure to nearer -3dB. Doubling those all again (0.022uF and 0.047uF) would bring the 100Hz up to about -1dB, but that may be too far ... -3dB at 100Hz is probably good.
Jazz relative beginner, starting at a much older age than was helpful.
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![[Linked Image from i.imgur.com]](https://i.imgur.com/HqlEIiZ.jpg) One around 40 lbs and one around 50 lbs. The 50 lbs Wahoo broke my 50 pound scale...lol The ocean had been really rough the day before but calm down for a bit Friday morning. Winter time fishing. This was about 130 miles offshore from Key West Florida. We caught a bunch of other types of fish. ![[Linked Image from i.imgur.com]](https://i.imgur.com/6gw9FLm.jpg) A few of the yellow eye snapper. They were easer to pick up when I was younger...lol Thanks for the cap ideas. Cheers, Billy
Last edited by Planobilly; 12/07/24 09:11 PM.
“Amazing! I’ll be working with Jaco Pastorius, Charlie Parker, Art Tatum, and Buddy Rich, and you’re telling me it’s not that great of a gig?
“Well…” Saint Peter, hesitated, “God’s got this girlfriend who thinks she can sing…”
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