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Thread: Fender Twin Reverb II Rivera Parts Question

  1. #1
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    Fender Twin Reverb II Rivera Parts Question

    Bought a chassis for a Fender Twin Reverb II and its missing the reverb and the transformer. I bought because i enjoy these types of projects. Where can i find a part list for this amp so i can make sure that I purchase the correct parts for it?

  2. #2
    Forum Member phantomman's Avatar
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    Re: Fender Twin Reverb II Rivera Parts Question

    Can't say about the reverb tank but the reverb tranny is likely Fender P/N 022921.
    "When injustice becomes law then rebellion becomes duty."

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    Forum Member Michael Smith's Avatar
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    Re: Fender Twin Reverb II Rivera Parts Question

    I found the schematic for the Twin Reverb II and can confirm the reverb transformer is Fender P/N 022921, as reported by Phantomman. As for the tank itself, no information was indicated on the schematic (part number or impedance).
    "When You're Riding Down the Highway at Night, And You're Feeling that Wild Turkey's Bite" ZZ Top

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    Re: Fender Twin Reverb II Rivera Parts Question

    Didn't all the combos use 4AB2C1B?

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    Forum Member Michael Smith's Avatar
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    Re: Fender Twin Reverb II Rivera Parts Question

    After looking at a few more Fender schematics, it looks like many of the old Fender amps with reverb used that same reverb transformer identified above. However, when I looked at the transformers in my 60's and 70's amps, they all had a different Woodward-Schumacher reverb transformers. Super Reverb, Twin Reverb and Deluxe Reverb, all with original transformers. So maybe Fender used whatever was available, despite the Fender part number on the schematics.

    As for the reverb tanks, I have had all of them out of my amps and out of the black bags at different times, but failed to write down the part numbers. If they all are 4AB2C1B, that would indicate 8 Ohm input impedance, 2,250 Ohm output impedance, medium decay, input insulated/output grounded per the part number code.
    "When You're Riding Down the Highway at Night, And You're Feeling that Wild Turkey's Bite" ZZ Top

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    Re: Fender Twin Reverb II Rivera Parts Question

    Thanks guys, I appreciate the wisdom.

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    Forum Member Michael Smith's Avatar
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    Re: Fender Twin Reverb II Rivera Parts Question

    Quote Originally Posted by RalphieRVA View Post
    Thanks guys, I appreciate the wisdom.
    Amplified Parts has lots of information on reverb tanks that you may find helpful.
    "When You're Riding Down the Highway at Night, And You're Feeling that Wild Turkey's Bite" ZZ Top

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