Blackdface Twin,reverb tank impedance

Bandmaster, Bassman, Champ, Concert, Deluxe, Harvard, Princeton, Pro, Super, Tremolux, Twin, Vibrasonic, Vibrolux, Vibroverb and others

Blackdface Twin,reverb tank impedance

Postby strangedays on Fri Jan 06, 2017 4:17 pm

Hi,i'm trying to replace the original Hammond Gibbs reverb tank with another 60's one. There are many hammond gibbs unit for sale at resonable prices but I'd like to know how to tell the proprer input and output resistance.
I found two until now ; one mesures 1.2 ohms and 41.3 ohms ,the other one; 8 ohms and output impedance of 600 ohms.
Maybe one of them could fit fine on my twin?
Or at least i'd like to know if it's possible to know between which impedance values i have to stay to choose for the next ones.
Thank you,
Cheers.
strangedays
Court Jester
 
Posts: 83
Joined: Mon Sep 01, 2008 10:04 am

Re: Blackdface Twin,reverb tank impedance

Postby stratele52 on Sun Jan 08, 2017 10:14 am

No one you show are the good one, Order the right one from a dealer


Accutronic use in Fender amp is a 4AB3C1B
https://www.tubesandmore.com/products/r ... cs-4ab3c1b

Impedance need are 8 ohms and 2250 ohms for any brand of tank
Not the same as DC resistance we read with meter. I have a 4AB3C1B at home and DC resistance are 1.1 ohms and 240 ohms

https://www.amplifiedparts.com/tech-cor ... d-compared

http://www.accutronicsreverb.com
stratele52
Knight
 
Posts: 1904
Joined: Sat Aug 21, 2010 9:35 am
Location: Québec province, Canada

Re: Blackdface Twin,reverb tank impedance

Postby strangedays on Sun Jan 08, 2017 12:38 pm

Thankls a lot for reply.
I was aware 4ab3c1b's are the perfect replacement for twin,and before to order one i was trying to search for an original hammond replacement.Mine unfortunately has broken magnets and i've read the newer one didn't sound well as the originals.
Thanks again.
strangedays
Court Jester
 
Posts: 83
Joined: Mon Sep 01, 2008 10:04 am

Re: Blackdface Twin,reverb tank impedance

Postby stratele52 on Sun Jan 08, 2017 2:35 pm

For a Vintage amp, original parts are a very good idea, te best way to go.
stratele52
Knight
 
Posts: 1904
Joined: Sat Aug 21, 2010 9:35 am
Location: Québec province, Canada


Return to Fender

Who is online

Users browsing this forum: Google [Bot] and 2 guests