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Hoffman Amps Forum image Author Topic: Varistor for magnatone vibrato?  (Read 33536 times)

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Offline lego4040

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Re: Varistor for magnatone vibrato?
« Reply #100 on: February 13, 2015, 08:43:23 pm »
Ok, your not going to get two leads clearly thru to bottom and out. I DID get two very snuggley in with one peaking thru bottom. Solution is to get a bit a little larger then ID and drill thru or me personally would have been satisfied with the fit and soldered
« Last Edit: February 13, 2015, 09:13:07 pm by lego4040 »

Offline sluckey

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Re: Varistor for magnatone vibrato?
« Reply #101 on: February 13, 2015, 09:09:22 pm »
Thanks guys.
A schematic, layout, and hi-rez pics are very useful for troubleshooting your amp. Don't wait to be asked. JUST DO IT!

Offline jojokeo

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Re: Varistor for magnatone vibrato?
« Reply #102 on: February 13, 2015, 10:24:59 pm »
Hey lego, will two of those varistor leads fit into the top of one of Doug's turrets?
Not sure what the point is going through the bottom of the turret? There's two caps that also have to connect here right? Is it to make the board as compact as humanly possible connecting all to a single turret?
To steal ideas from one person is plagiarism. To steal from many is research.

Offline sluckey

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Re: Varistor for magnatone vibrato?
« Reply #103 on: February 13, 2015, 10:32:19 pm »
The layout I did requires two varistors to share a common turret. Looks like I'll be modifying that.
A schematic, layout, and hi-rez pics are very useful for troubleshooting your amp. Don't wait to be asked. JUST DO IT!

Offline lego4040

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Re: Varistor for magnatone vibrato?
« Reply #104 on: February 14, 2015, 09:01:38 am »
You modify that already? That varistor hook looks different now

Offline sluckey

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Re: Varistor for magnatone vibrato?
« Reply #105 on: February 14, 2015, 09:34:57 am »
You modify that already? That varistor hook looks different now
yes
A schematic, layout, and hi-rez pics are very useful for troubleshooting your amp. Don't wait to be asked. JUST DO IT!

Offline lego4040

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Re: Varistor for magnatone vibrato?
« Reply #106 on: February 14, 2015, 10:18:11 am »
Low part count there on the board. I have the PT, I will use AllenAmps TO11C from my previous build. Steve? Is it me or on your layout picture you have the choke as the OT?

Offline sluckey

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Re: Varistor for magnatone vibrato?
« Reply #107 on: February 14, 2015, 11:16:33 am »
Must be you. I see a 125A35A OT. Ain't no choke in this little amp.
A schematic, layout, and hi-rez pics are very useful for troubleshooting your amp. Don't wait to be asked. JUST DO IT!

Offline lego4040

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Re: Varistor for magnatone vibrato?
« Reply #108 on: February 14, 2015, 11:24:13 am »
Ah, I thought that was the small fender choke #. My mistake, I

Offline sluckey

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Re: Varistor for magnatone vibrato?
« Reply #109 on: February 14, 2015, 12:39:24 pm »
The OT you put in your revibe is perfect for this amp. The 125A35A / 022905 is a Fender Champ OT.
A schematic, layout, and hi-rez pics are very useful for troubleshooting your amp. Don't wait to be asked. JUST DO IT!

Offline lego4040

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Re: Varistor for magnatone vibrato?
« Reply #110 on: February 14, 2015, 02:37:08 pm »
This is the OT I have laying around Heavy-duty upgrade output transformer for single-ended amps using a 6V6, 6L6, EL34 or dual 6V6 power tubes is custom wound in the USA by Heyboer to stringent Allen specifications. 8,000 ohm primary to   8 or 16 ohm secondary for use with a single 6V6. 4,000 ohm to 4 or 8 ohm for use with a single 6L6, EL34 or two 6V6s in parallel. Rated 95ma continuous! Wound on a paper tube with paper-layered and specially interleaved windings and featuring a special grain-oriented lamination steel for maximum output and clarity. Excellent choice for 5F1, 5F2A and similar amps with more commonly available 8 ohm speakers. Improved performance over stock output transformers. 2-5/8"H by 2-1/8"W with 2-13/16" mounting centers. Durable black oxide finish. 12" Unistrand pretinned leads for fast installation. Stainless-steel mounting hardware included! 1.6lbs

 


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