Results 1 to 16 of 16

Thread: Noisy ol Deluxe reverb

  1. #1
    Senior Member
    Join Date
    Feb 2007
    Location
    Iowa
    Posts
    1,387
    Thumbs Up/Down
    Received: 11/0
    Given: 2/1
    Rep Power
    14

    Noisy ol Deluxe reverb

    Ive got a 66 DR here...owner wanted it re-capped , cleaned, re-tubed , etc...

    Ive replaced every cap in the amp , the resistors above the 6v6 sockets and plate resistors. Verified all grounds
    .
    Ive been chasing crazy noises and a low freq hum today. Whooshing , ocean noises ..odd radio signal frequencies , random cliks and pops.....static on and off....

    I went through it with cold spray and i dont hear anything change when hitting each component.

    I will try swapping out all the new tubes tonight .

    I read somewhere that if these old fiber boards get warped they can cause all kinds of crazy noises.......exactly what i have.....and yes ..the boards in this are very , very warped .

    Think this might be the problem ??

    0 Not allowed! Not allowed!
    Last edited by Valvehead; 07-07-2019 at 01:56 AM. Reason: .

  2. #2
    Old Timer Leo_Gnardo's Avatar
    Join Date
    Sep 2012
    Location
    Dogpatch-on-Hudson
    Posts
    6,068
    Thumbs Up/Down
    Received: 1,113/15
    Given: 1,054/0
    Rep Power
    13
    It's not so much the warped, it's conductivity in the circuit boards. And every summer in the US, well heck, anywhere, it seems humidity makes it worse. A MUCH DISCUSSED TOPIC on these pages! The boards are black, because they're loaded with carbon black to make them look that way. And carbon - - - is conductive. Not as much as metals, but enough to raise hob with old Fenders, and even brand new kit builds that use this material. Ask Randall...

    Enzo sez, shoot hot air from a hair dryer or heat gun onto the board, might help out. Sometimes yes, sometimes not so much.

    What I do, is move the sensitive portions of the audio circuit onto tie strips. Looks a little messy but solves the problem at a reasonable price. If the amp's owner has deep pockets & a willingness to spend on a permanent solution, you can rip out the offending circus boards & replace with a point to point board made of epoxy-fiberglass or some other material that won't conduct at random. One source is Doug Hoffman in North Carolina - he was one of the first to offer these back in the early 90's. Probably a dozen or more other sources across the USA and I'm sure in other parts of the world. Doug might even point out who - you oughta contact him if this solution is in the amp's future.

    2 Not allowed! Not allowed!
    Enjoy. Every. Sandwich.

  3. #3
    Bent Member Chuck H's Avatar
    Join Date
    May 2007
    Location
    pacific north west
    Posts
    14,864
    Thumbs Up/Down
    Received: 1,911/4
    Given: 2,148/0
    Rep Power
    29
    This^^^^^^^^^^^^^^^

    And... Why did you replace all the caps? It's predominantly the electrolytic caps that fail with age. Some posts by our local Randall have revealed a great deal more film cap failures than we're use to seeing, but they should still be tested before being arbitrarily replaced. I guess my point is, if you didn't test something and find it in need of replacement, why did you replace it? It's true enough that seasonal humidity can cause problems with old, black paper circuit boards. But in my experience too much soldering and resoldering can solidify conductive pathways that can no longer be mitigated by drying out. In this light the arbitrary replacement of parts, that seems to be VERY common on vintage amps, can be of tremendous detriment. Creating a situation where the only solution is to tank everything you've already done and replace the entire circuit board (as Leo mentioned). Because I do modifications I've seen this on a number of black paper boards. And I've replaced all of them with boards I've had to make myself. There's a chance you could have saved yourself the trouble if you hadn't done any unnecessary soldering, but it's too late for that now. Now you may be in the same boat I've found myself in on so many occasions. I hope not. The good news is that there IS a solution. Troublesome as it might be.

    0 Not allowed! Not allowed!
    "Never bet your life on somebody else doing their job." SoulFetish's good friend

    "Now get off my lawn with your silicooties and boom-chucka speakers and computers masquerading as amplifiers" Justin Thomas

    "Being born on third base and thinking that you must have hit a triple is pure delusion!" Steve A

    "Back to the amp. It makes horrible sounds when I play my guitar thru it... because I suck at playing guitar." Mike6158

  4. #4
    Senior Member
    Join Date
    Feb 2007
    Location
    Iowa
    Posts
    1,387
    Thumbs Up/Down
    Received: 11/0
    Given: 2/1
    Rep Power
    14
    the amp made all that noise before i evened opened it. Replaced caps because the owner wanted all NEW caps. Im saving all the old parts for him .

    i was looking at the Mojo boards. I wonder if they are made from a different/ better material than the factory ?

    https://www.mojotone.com/amp-parts/F...-with-Reverb_2

    0 Not allowed! Not allowed!

  5. #5
    Senior Member SoulFetish's Avatar
    Join Date
    Jan 2016
    Location
    Massachusetts
    Posts
    1,104
    Thumbs Up/Down
    Received: 325/1
    Given: 284/0
    Rep Power
    6
    Couple of things to check:
    - The 820Ω feedback resistor. Sometime this warped boards can stress the solder joints and leads. pull it off the board to give it a little strain relief.
    - The coupling caps. I've chased noises around in circles in some of these old fenders. Visually checking all the solder joints on the board, and they look find upon visual inspection only to have one of the cap leads pull right out leaving a pin sized hole in the solder where the lead was.

    0 Not allowed! Not allowed!
    If I have a 50% chance of guessing the right answer, I guess wrong 80% of the time.

  6. #6
    Old Timer Leo_Gnardo's Avatar
    Join Date
    Sep 2012
    Location
    Dogpatch-on-Hudson
    Posts
    6,068
    Thumbs Up/Down
    Received: 1,113/15
    Given: 1,054/0
    Rep Power
    13
    Quote Originally Posted by Valvehead View Post
    i was looking at the Mojo boards. I wonder if they are made from a different/ better material than the factory ?
    No, they most emphatically are not! Randall, please step up and tell the man! Valvehead, prepare yourself for a sad tale of woe and intrigue.

    Of course, if you don't want to take good advice, prepare to relive the experience. What we try to do here - and sometimes actually manage to accomplish - is to learn from other people's mistakes. Saves a lot of grief. And wasted time.

    1 Not allowed! Not allowed!
    Enjoy. Every. Sandwich.

  7. #7
    Senior Member SoulFetish's Avatar
    Join Date
    Jan 2016
    Location
    Massachusetts
    Posts
    1,104
    Thumbs Up/Down
    Received: 325/1
    Given: 284/0
    Rep Power
    6
    Quote Originally Posted by Valvehead View Post
    the amp made all that noise before i evened opened it. Replaced caps because the owner wanted all NEW caps. Im saving all the old parts for him .

    i was looking at the Mojo boards. I wonder if they are made from a different/ better material than the factory ?

    https://www.mojotone.com/amp-parts/F...-with-Reverb_2
    So, you replaced all the film caps?

    0 Not allowed! Not allowed!
    If I have a 50% chance of guessing the right answer, I guess wrong 80% of the time.

  8. #8
    Bent Member Chuck H's Avatar
    Join Date
    May 2007
    Location
    pacific north west
    Posts
    14,864
    Thumbs Up/Down
    Received: 1,911/4
    Given: 2,148/0
    Rep Power
    29
    Well it's easy to see if a conductive board may be responsible. First, hit it with a hair dryer for about a half hour. Just find something to do while you're at it and keep waving the hair dryer across the board (headphones help ). Then poke your red probe into the board near high voltage eyelets that are in proximity to signal eyelets. If you read significant voltages you're in for it. If you don't...

    Have you cleaned all the contacts yet? Tube sockets, pots and jacks? The amp is OLD and everything gets dirty or oxidized given enough time.

    2 Not allowed! Not allowed!
    "Never bet your life on somebody else doing their job." SoulFetish's good friend

    "Now get off my lawn with your silicooties and boom-chucka speakers and computers masquerading as amplifiers" Justin Thomas

    "Being born on third base and thinking that you must have hit a triple is pure delusion!" Steve A

    "Back to the amp. It makes horrible sounds when I play my guitar thru it... because I suck at playing guitar." Mike6158

  9. #9
    Senior Member SoulFetish's Avatar
    Join Date
    Jan 2016
    Location
    Massachusetts
    Posts
    1,104
    Thumbs Up/Down
    Received: 325/1
    Given: 284/0
    Rep Power
    6
    another thing I've also seen which is more rare, but can still cause problems is a faulty reverb transformer.

    0 Not allowed! Not allowed!
    If I have a 50% chance of guessing the right answer, I guess wrong 80% of the time.

  10. #10
    Senior Member
    Join Date
    Feb 2007
    Location
    Iowa
    Posts
    1,387
    Thumbs Up/Down
    Received: 11/0
    Given: 2/1
    Rep Power
    14
    all caps.

    any joints i didnt use i re-flowed. No change in noise

    the noises are without the rev tank plugged in and rev pot on 0 ....if that matters. I do have a fender reverb transformer around here somewhere

    0 Not allowed! Not allowed!

  11. #11
    Senior Member
    Join Date
    Feb 2007
    Location
    Iowa
    Posts
    1,387
    Thumbs Up/Down
    Received: 11/0
    Given: 2/1
    Rep Power
    14
    Quote Originally Posted by Leo_Gnardo View Post
    No, they most emphatically are not! Randall, please step up and tell the man! Valvehead, prepare yourself for a sad tale of woe and intrigue.

    Of course, if you don't want to take good advice, prepare to relive the experience. What we try to do here - and sometimes actually manage to accomplish - is to learn from other people's mistakes. Saves a lot of grief. And wasted time.
    ok - thanks !!

    0 Not allowed! Not allowed!

  12. #12
    Senior Member
    Join Date
    Feb 2007
    Location
    Iowa
    Posts
    1,387
    Thumbs Up/Down
    Received: 11/0
    Given: 2/1
    Rep Power
    14
    Quote Originally Posted by Chuck H View Post
    Well it's easy to see if a conductive board may be responsible. First, hit it with a hair dryer for about a half hour. Just find something to do while you're at it and keep waving the hair dryer across the board (headphones help ). Then poke your red probe into the board near high voltage eyelets that are in proximity to signal eyelets. If you read significant voltages you're in for it. If you don't...

    Have you cleaned all the contacts yet? Tube sockets, pots and jacks? The amp is OLD and everything gets dirty or oxidized given enough time.
    yes all sockets/ jacks/ pots. There are 2 pots that are still scratchy,,after several attempts. Both Volumes

    0 Not allowed! Not allowed!

  13. #13
    Bent Member Chuck H's Avatar
    Join Date
    May 2007
    Location
    pacific north west
    Posts
    14,864
    Thumbs Up/Down
    Received: 1,911/4
    Given: 2,148/0
    Rep Power
    29
    Quote Originally Posted by Valvehead View Post
    yes all sockets/ jacks/ pots. There are 2 pots that are still scratchy,,after several attempts. Both Volumes
    Test for DC on those pots. Maybe the pots are scratchy, but maybe there's voltage on them causing the noise. Maybe it's the board. Maybe a hair dryer will help, maybe not. Maybe it's the coupling caps. Just because a part is new doesn't always mean it works.

    0 Not allowed! Not allowed!
    "Never bet your life on somebody else doing their job." SoulFetish's good friend

    "Now get off my lawn with your silicooties and boom-chucka speakers and computers masquerading as amplifiers" Justin Thomas

    "Being born on third base and thinking that you must have hit a triple is pure delusion!" Steve A

    "Back to the amp. It makes horrible sounds when I play my guitar thru it... because I suck at playing guitar." Mike6158

  14. #14
    Senior Member SoulFetish's Avatar
    Join Date
    Jan 2016
    Location
    Massachusetts
    Posts
    1,104
    Thumbs Up/Down
    Received: 325/1
    Given: 284/0
    Rep Power
    6
    Quote Originally Posted by Valvehead View Post
    yes all sockets/ jacks/ pots. There are 2 pots that are still scratchy,,after several attempts. Both Volumes
    checked all the ground lead connections to the brass L bracket? I should have mentioned that in the "common problems" post.

    0 Not allowed! Not allowed!
    If I have a 50% chance of guessing the right answer, I guess wrong 80% of the time.

  15. #15
    Senior Member
    Join Date
    Feb 2007
    Location
    Iowa
    Posts
    1,387
    Thumbs Up/Down
    Received: 11/0
    Given: 2/1
    Rep Power
    14
    Quote Originally Posted by Chuck H View Post
    Test for DC on those pots. Maybe the pots are scratchy, but maybe there's voltage on them causing the noise. Maybe it's the board. Maybe a hair dryer will help, maybe not. Maybe it's the coupling caps. Just because a part is new doesn't always mean it works.
    ill try the hair dryer thing.

    i do have 2vdc at the outside lug of the volume on the vibrato ch.

    1 Not allowed! Not allowed!

  16. #16
    Senior Member
    Join Date
    Feb 2007
    Location
    Iowa
    Posts
    1,387
    Thumbs Up/Down
    Received: 11/0
    Given: 2/1
    Rep Power
    14
    yes all grounds good

    1 Not allowed! Not allowed!

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Deluxe Reverb Build - noisy vibrato and slow response to vibrato pedal
    By Bluefinger in forum Maintenance, Troubleshooting & Repair
    Replies: 4
    Last Post: 02-06-2016, 03:42 AM
  2. Noisy Reverb on Rivera R55-12
    By NPB_EST.1979 in forum Maintenance, Troubleshooting & Repair
    Replies: 0
    Last Post: 07-18-2010, 05:05 PM
  3. Noisy Princeton Reverb Clone
    By blewgrass in forum Maintenance, Troubleshooting & Repair
    Replies: 24
    Last Post: 04-04-2010, 10:38 PM
  4. Fender Pro Tube Pro Reverb - Dead Tremolo and Noisy Reverb
    By pmwalk in forum Maintenance, Troubleshooting & Repair
    Replies: 1
    Last Post: 12-09-2009, 10:54 PM
  5. Noisy Traynor TR-2 reverb tank
    By dusty tolex in forum Maintenance, Troubleshooting & Repair
    Replies: 4
    Last Post: 05-28-2008, 09:27 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •