FDP Home Page / FDP Forum / FAQ's

The FDP is made possible by the following companies and individual members like you.
Please use the links below to show them we value their sponsorship.

MOD KITS DIY

Musician's Friend

Yellowjackets Tube Converters

Apex Tube Matching

Jensen Loudspeakers

Antique Electronics Supply

WD Music

Advertise here

Sweetwater

Guitar Center

Amplified Parts


* God bless America and our men and women in uniform *

* Illegitimi non carborundum! *

If you benefit and learn from the FDP and enjoy our site, please help support us and become a Contributing Member or make a Donation today! The FDP counts on YOU to help keep the site going with an annual contribution. It's quick and easy with PayPal. Please do it TODAY!

Chris Greene, Host & Founder

LOST YOUR PASSWORD?

......................................................................

   
FDP Jam
Calendar
Find musicians
in your area!
  Search the Forums  

FDP Forum / Fender Amps: Vintage (before 1985) / 74 Fender Twin Reverb

KDRidnour

US

Jan 10th, 2018 03:57 PM   Edit   Profile   Print Topic   Search Topic

I looked at a 74 Twin Reverb the other day but it lacked power (I know I owned a 74 before). I see it had the original tubes in it. I know that could be the problem that and 100 different things. Has anyone here on this forum cleared that problem up by putting in new tubes? Thanks Keith

BbendFender
Contributing Member
**********
**

American Patriot

About as ordinary as you can get.
Jan 10th, 2018 05:39 PM   Edit   Profile   Print Topic   Search Topic

Tubes might be the first thing to try if volume was low. Oh, I would test the tubes too.

Hammond101
Contributing Member
**********
**

So. Cal. USA

Jan 11th, 2018 09:50 AM   Edit   Profile   Print Topic   Search Topic

Make sure the speakers are wired correctly and the speaker cable is plugged into the main out not the extension jack.

No telling but if it were on my bench my first look would be to check the filter caps for high ESR to ensure it is actually safe to operate then check the bias setting on the power tubes.

Knowing the current draw will tell you what is up with the power tubes. If it passed all this then it's time to look at the phase inverter and preamp sections.



Roger Ball
Contributing Member
**********
*******

Canada

New guitars, old amps. Perfect.
Jan 11th, 2018 11:03 AM   Edit   Profile   Print Topic   Search Topic

All the above advice is spot on.

I discovered something while doing a full maintenance on a friend's 1970 Twin Reverb, including tubes, filter caps, cleaning pots etc. The amp sounded OK but I thought it should have been louder. Just before putting it back together I poked around the board with a wooden chopstick while strumming. Somewhere around the phase inverter area the thing suddenly jumped up in volume. I could also make it go quieter again indicating a poor solder joint somewhere.

I re-flowed the connections in the general area and that solved it. Just lucky, but you never know.

These amps are workhorses but years of being played, dragged around and loaded into trunks and trailers can take a toll on electrical connections.

pcalu

usa metro detroit

Jan 27th, 2018 03:58 PM   Edit   Profile   Print Topic   Search Topic

Waiting to get my 75 Twin Reverb back from the tech. I had it black faced and it sounded awesome, then during a gig went dead. Turns out the OT trans fried. After 40+ years well isn't that a kick in the arse! lol how dare that Twin!

IMo I really like an early 70's Silver Faced Twin that has been blackfaced. I use the Master volume and think that it doesn't suck the life out of the amp's tone at all. The extra gain feature of the amp well... now that is an epic fail, but I never use it.

FDP Forum / Fender Amps: Vintage (before 1985) / 74 Fender Twin Reverb




Reply to this Topic
Display my email address             Lost your password?
Your Message:
Link Address (URL):
Link Title:




Moderators: Chris Greene  Iron Man  reverendrob  

FDP, LLC Privacy Policy: Your real name, username, and email
are held in confidence and not disclosed to any third parties, sold, or
used for anything other than FDP Forum registration unless you specifically authorize disclosure.

Furtkamp.com 
Internet Application Development

Copyright © 1999-2018 Fender Discussion Page, LLC   All Rights Reserved