Hoffman Amplifiers Tube Amplifier Forum
Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: MSVguitar on February 17, 2024, 08:32:24 pm
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I am planning to build a Deluxe Reverb AB763. I found some info on Rob Robinette's site that showed a layout of the tone stack built on the pots and a tag strip. I thought that it was a good idea that allowed for short leads between the pots and components while gaining some space on the main board. I just started a layout and thought that I would post it for feedback. Also, I am planning to replace the tremolo oscillator with Sluckey's Trem-o-nator. Any comments and suggestions would be appreciated.
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Hi MSV,
Done it many times. I've kept it fairly compact and you are right to use quality shielded audio cable/Coax.
(Even done it with James stacks) No instability :icon_biggrin:
Regards
Mirek
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Hi Mirek,
Thanks for your feedback!
Best Regards,
Mark
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I did the same with my PeeWee amp.
(https://sluckeyamps.com/PeeWee/A_big_bottom.jpg)
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Mark,
I do this as well. I use a dual ganged pot but scrape the carbon off the top pot at each end and the wiper creating a 3 tag terminal strip.
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I use a dual ganged pot but scrape the carbon off the top pot at each end and the wiper creating a 3 tag terminal strip.
Unusual but neat idea! I like it. Could be trouble for someone else later on. :icon_biggrin:
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I use a dual ganged pot but scrape the carbon off the top pot at each end and the wiper creating a 3 tag terminal strip.
Unusual but neat idea! I like it. Could be trouble for someone else later on. :icon_biggrin:
Clever it is.. though I agree this could be more than a little confusing for some future technician.
One possible alternative is to solder a 3-pos strip directly to the case of the pot. You get your 3 terminals, and it's less costly and confusing.
(I'm also a fan of replacing FP-style cans by bending a terminal over and soldering the foot of a term strip to it. Gives you a place to mount new caps and the ground lugs on the can are still available.)
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I use a dual ganged pot but scrape the carbon off the top pot at each end and the wiper creating a 3 tag terminal strip.
Unusual but neat idea! I like it. Could be trouble for someone else later on. :icon_biggrin:
Clever it is.. though I agree this could be more than a little confusing for some future technician.
One possible alternative is to solder a 3-pos strip directly to the case of the pot. You get your 3 terminals, and it's less costly and confusing.
(I'm also a fan of replacing FP-style cans by bending a terminal over and soldering the foot of a term strip to it. Gives you a place to mount new caps and the ground lugs on the can are still available.)
Thanks everyone for the feedback. I also like the alternatives for mounting the components, but I don't know what a FP-style can is. :dontknow:
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here so you can see one FP is a letter designation Mallory used to identify its metal can capacitors https://hallmanlabs.com/wp-content/uploads/2020/01/Mallory_FP-WP_Series_capacitors_1985.pdf
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here so you can see one FP is a letter designation Mallory used to identify its metal can capacitors https://hallmanlabs.com/wp-content/uploads/2020/01/Mallory_FP-WP_Series_capacitors_1985.pdf
Got it! I had never heard the 'FP' reference for a cap can. Thank you!
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The attached YouTube links show the CE production process using the original/antique Mallory machinery.
https://www.youtube.com/watch?v=yfSSIO2c_ak (https://www.youtube.com/watch?v=yfSSIO2c_ak)
https://www.youtube.com/watch?v=ITYPYwc_GEo (https://www.youtube.com/watch?v=ITYPYwc_GEo)
https://www.youtube.com/watch?v=HDcEZURxWOs&t=0s (https://www.youtube.com/watch?v=HDcEZURxWOs&t=0s)