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Hoffman Amps Forum image Author Topic: Hoffman AB763 Trem-O-Nator Upgrade  (Read 21979 times)

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Offline tubenit

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Re: Hoffman AB763 Trem-O-Nator Upgrade
« Reply #100 on: March 27, 2020, 11:11:31 am »
Maybe try a 100KA reverb pot

Offline sluckey

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Re: Hoffman AB763 Trem-O-Nator Upgrade
« Reply #101 on: March 27, 2020, 01:01:09 pm »
+1

Using a log taper pot is the best/easiest thing to do. Adding a dwell pot is the next best thing to do to tame the reverb.
A schematic, layout, and hi-rez pics are very useful for troubleshooting your amp. Don't wait to be asked. JUST DO IT!

Offline PRR

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Re: Hoffman AB763 Trem-O-Nator Upgrade
« Reply #102 on: March 27, 2020, 02:40:36 pm »
> I can barley get to 2 before it goes into some deep caverns.  I am using a 100K linear

What does it do at "10"? Is it just A Whole Lot-t-t-t-t, or does it fall into the bowels of the earth?

If it is just WAY too much, take some gain out of the reverb path.

If the "10=Richard Dale" setting works but you can't get a subtle "air", use a Audio taper so "2" comes out smaller.

Offline sluckey

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Re: Hoffman AB763 Trem-O-Nator Upgrade
« Reply #103 on: March 28, 2020, 07:00:33 am »
When you get a chance make a sound clip that demonstrates the TON at several speed/intensity settings. Maybe that will tease Jeff enough to make him get off the pot.  :icon_biggrin:
A schematic, layout, and hi-rez pics are very useful for troubleshooting your amp. Don't wait to be asked. JUST DO IT!

Offline tubenit

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Re: Hoffman AB763 Trem-O-Nator Upgrade
« Reply #104 on: March 28, 2020, 07:22:05 am »
+1    I'd love to hear a new clip!  Something with intensity cranked up and the speed slowed down.

IF I may make a request,  I'd like to hear something like this.   :icon_biggrin: :icon_biggrin: :icon_biggrin:

&t=41s
« Last Edit: March 28, 2020, 08:00:58 am by tubenit »

Offline shooter

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Re: Hoffman AB763 Trem-O-Nator Upgrade
« Reply #105 on: March 28, 2020, 07:40:52 am »
PurpleTele
fwiw
80% of my self imposed build errors have been in the TON circuit, did I catch your bugs  :icon_biggrin:
Went Class C for efficiency

Offline sluckey

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Re: Hoffman AB763 Trem-O-Nator Upgrade
« Reply #106 on: March 28, 2020, 08:33:03 am »
Maybe a little CCR too...


A schematic, layout, and hi-rez pics are very useful for troubleshooting your amp. Don't wait to be asked. JUST DO IT!

Offline shooter

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Re: Hoffman AB763 Trem-O-Nator Upgrade
« Reply #107 on: March 28, 2020, 09:25:40 am »
I'm holding out for some 'lil wing with tremolo   :icon_biggrin:
Went Class C for efficiency

Offline finkaudio

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Re: Hoffman AB763 Trem-O-Nator Upgrade
« Reply #108 on: May 30, 2020, 01:10:56 pm »
....maybe a stupid question:  :think1:

What can I do with the leftover triode? I wish I could get a bit of crunch out of the amp.....maybe using it as a cold biased stage to add some 2nd harmonic.

Is there a layout for the 2-channel....not so important, but would be nice to have and could save some brain-stretching :w2:.

ATB KH

Offline sluckey

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Re: Hoffman AB763 Trem-O-Nator Upgrade
« Reply #109 on: May 30, 2020, 02:03:03 pm »
What can I do with the leftover triode? I wish I could get a bit of crunch out of the amp.....maybe using it as a cold biased stage to add some 2nd harmonic.

Is there a layout for the 2-channel....not so important, but would be nice to have and could save some brain-stretching :w2:.
Here's one...

     http://sluckeyamps.com/misc/bandmaster.pdf
A schematic, layout, and hi-rez pics are very useful for troubleshooting your amp. Don't wait to be asked. JUST DO IT!

Offline finkaudio

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Re: Hoffman AB763 Trem-O-Nator Upgrade
« Reply #110 on: May 31, 2020, 11:26:04 am »
...thanks Sluckey! OK, my amp will have the Reverb as well, but it's nice to add a 3rd stage to the Normal channel :-)

Best regards

KH


Offline sluckey

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Re: Hoffman AB763 Trem-O-Nator Upgrade
« Reply #111 on: May 31, 2020, 02:40:39 pm »
...thanks Sluckey! OK, my amp will have the Reverb as well, but it's nice to add a 3rd stage to the Normal channel :-)
Here's a thread where the Trem-O-Nator was added to a Pro Reverb amp...

     https://el34world.com/Forum/index.php?topic=24603.msg265118#msg265118

In reply #4 you will find the original Fender schematic/layout showing exactly how the mod was done.

Or maybe you prefer the Hoffman style layout... You can use the Hoffman board to build this. Turret layout is exactly the same. See attached...
A schematic, layout, and hi-rez pics are very useful for troubleshooting your amp. Don't wait to be asked. JUST DO IT!

Offline finkaudio

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Re: Hoffman AB763 Trem-O-Nator Upgrade
« Reply #112 on: May 31, 2020, 02:57:46 pm »
Dear Sluckey,


thanks a lot! I got a set of boards from Mr. Hoffman already, so I have a plan now  :worthy1:

Best regards from Germany!

KH

Offline sluckey

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Re: Hoffman AB763 Trem-O-Nator Upgrade
« Reply #113 on: May 31, 2020, 03:14:55 pm »
If you decide to do this please start a new thread and share your project with us.
A schematic, layout, and hi-rez pics are very useful for troubleshooting your amp. Don't wait to be asked. JUST DO IT!

 


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