Hoffman Amplifiers Tube Amplifier Forum
Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: JayCobie on October 12, 2017, 12:51:13 pm
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I happened to come in to possession of 4 different vintage chokes, all roughly rated the same as what a Fender Twin uses, and it just so happens that I have a Fender Twin Reverb 65' Reissue that I wouldn't mind using as a test-bed to see how different chokes affect the behavior or sound of the amp.
I will admit that I'm quite a novice in these matters and reading up on how to calculate chokes makes my head spin so I'm wondering if you guys could help me out:
Would the following 4 chokes require any obvious modification of the circuit in order for me to be able to use them in a stock 65' TRRI or could they (theoretically atleast) be safely be dropped straight in as replacements with no modifications?
Here is a link to the schematic: http://www.thetubestore.com/lib/thetubestore/schematics/Fender/Fender-65-Twin-Reverb-Reissue-Schematic.pdf (http://www.thetubestore.com/lib/thetubestore/schematics/Fender/Fender-65-Twin-Reverb-Reissue-Schematic.pdf)
Choke 1
L=2.3 henries
R=60 ohms
I=150 mA
Choke 2
L=3.5 henries
R=60 ohms
I=150 mA
Choke 3
L=5 henries
R=130 ohms
I=200 mA
Choke 4
L=6 henries
R=110 ohms
I=200 mA
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Just for clarification: Yes, I realize they probably won't much affect the sound much but since I have them and I'm a tinkerer by heart, I'm just curious to see if they would really affect the sound or feel of the amp to any obvious degree.
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You can safely put any of those chokes in the TRRI.