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FDP Forum / Fender Amps: Vintage (before 1985) / 3-prong amp, 2-prong Fender Reverb unit


S.F. Bay Area

May 12th, 2019 03:32 PM   Edit   Profile  

Is there any safe scenario using an amp with a 3-prong cord (Blonde Tremoluxe or Tweed Twin R.I.) with a vintage 2-prong Fender Reverb Unit? Or is converting the Reverb to a 3-prong the only safe solution?

(This message was last edited by Paulsy at 05:33 PM, May 12th, 2019)

Moderator Emeritus
(with many stars)

Ja! Nein!

May 12th, 2019 03:47 PM   Edit   Profile  

The 3-prong conversion is pretty simple to do, so...



May 12th, 2019 04:01 PM   Edit   Profile  

If you're just playing it a home then reverse the plug on the reverb unit for the least amount of noise. If you're going to gig it, then have a three prong installed.

Contributing Member

Planet Peegoo

Rhythm & Lewd Guitarist
May 12th, 2019 05:35 PM   Edit   Profile  

Flipping a two-wire plug can be deadly...

If in doubt, use a meter to test for AC voltage between the chassis and ground. You may discover the metal chassis is live at mains voltage.

Best solution is to convert any two-wire equipment to grounded three wire. It's super simple; anyone that can operate a screwdriver and pliers can do it.

Here's how.

Contributing Member


May 13th, 2019 06:58 AM   Edit   Profile  

Another vote for 3-prong. If I get a 2-prong amp, it the first thing I do to it.


usa Thumb area Mi

May 13th, 2019 02:18 PM   Edit   Profile  

I have a 69 Bassmen Head w/ 3 prongs and I think a 68 solid state reverb FR100 w/2.

Just have to make sure you have the right polarity, you will hear a hum if you don't.

FDP Forum / Fender Amps: Vintage (before 1985) / 3-prong amp, 2-prong Fender Reverb unit

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