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Topic: Session 400 trouble |
Clinton Zimmerman
From:
Memphis,Mo
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Posted 4 Apr 2016 8:15 am |
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| Hi guys I have a session 400 that I was given to see if it works. It does work but make a humming sound. When I turn the reverb up it gets worse, but still hums with all the knobs turned off any ideas??also has anyone ever heard of McGee custom design speakers? |
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Willie Sims
From:
PADUCAH, KY, USA
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Posted 4 Apr 2016 8:23 am
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| could be bad filter condensers. |
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Tony Prior
From:
Charlotte NC
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Posted 4 Apr 2016 8:30 am
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PV amps, as great as they are, need some general maintenance now and then. Remove the chassis, clean and burnish ( scrape mildly) each connector grounds and tips, in's ,out's, effects loop, Reverb connectors at both the chassis and the tank. All connectors on the PC bd as well..gentle cleaning, pull them off and reinstall them each a few times... This is an old S400, expect some maintenance...
Start here before you go to a tech...
_________________
Emmons L-II , Fender Telecasters, B-Benders , Eastman Mandolin ,
Pro Tools 12 on WIN 7 !
jobless- but not homeless- now retired 9 years
CURRENT MUSIC TRACKS AT > https://tprior2241.wixsite.com/website |
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Clinton Zimmerman
From:
Memphis,Mo
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Posted 4 Apr 2016 10:42 am
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| Will it hurt anything if I use it this way? |
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Lane Gray
From:
Topeka, KS
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Posted 4 Apr 2016 11:00 am
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Only your ears and your relationship with your bandmates.
_________________
2 pedal steels, a lapStrat, and an 8-string Dobro (and 3 ukes)
More amps than guitars, and not many effects |
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Tony Prior
From:
Charlotte NC
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Posted 4 Apr 2016 11:30 am
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| Clinton Zimmerman wrote: |
| Will it hurt anything if I use it this way? |
probably not but it may continue to get worse, fixing it is always preferred! 
_________________
Emmons L-II , Fender Telecasters, B-Benders , Eastman Mandolin ,
Pro Tools 12 on WIN 7 !
jobless- but not homeless- now retired 9 years
CURRENT MUSIC TRACKS AT > https://tprior2241.wixsite.com/website |
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Clinton Zimmerman
From:
Memphis,Mo
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Posted 4 Apr 2016 12:43 pm
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| Sure I plan to fix it ,but I just wanted to try it out and see what all is wrong with it didn't want to ruin anything.works good for the most part looks like the reverb isn't grounded,and a couple pots are bad ,but it sounds great. Thanks |
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Mike Brown
From:
Meridian, Mississippi USA
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Posted 4 Apr 2016 1:56 pm Session 400
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Or, send the chassis, reverb pan and harness to;
Peavey Service Center
Attn; Repair Department
412 Hwy. 80 East
Meridian, MS 39301
Please include your daytime phone number and a note of symptoms. Our techs will restore it to factory specs.
Mike Brown
Peavey USA |
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Harold Parris
From:
Piedmont, Alabama USA
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Posted 4 Apr 2016 2:19 pm Session
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I've had the experience of two Session 400's humming. On both amps someone had switched the reverb cables under the chassis and they were backwards. I reversed the two cables and the hum went away immediately .
_________________
EMCI Double 10,Session 400,Webb 614E and Gretsch Nashville Pro Steel Amp, Keith Hilton Digital Sustain pedal and Seymour Duncan KTG -1, Hughes&Kettner BATT
Harold Parris email hparris9@aol.com |
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Jerry Overstreet
From:
Louisville Ky
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Posted 4 Apr 2016 2:36 pm
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| Good info Harold. Had the same thing happen on an LTD that I had in for repair several years ago. Might not be your problem Clint, but you got nothing to lose by swapping the cables under the amp. |
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David Weisenthal
From:
Arizona, USA
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Posted 4 Apr 2016 6:27 pm
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Mine had the reverb pan mounted 180 degrees off, and the hum was much worse. The pop when powering on was fierce also. Mounting it correctly made all the difference. I'm not 100% sure, but I think the reverb pan input must be near the power transformer.
_________________
Derby SD10, Peavey Session 400 |
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Dennis Detweiler
From:
Solon, Iowa, US
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Posted 19 Apr 2016 8:07 pm
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It probably needs filter capacitors. I'd replace all of the other caps with upgrades.
_________________
1976 Birdseye U-12 MSA with Telonics 427 pickup, 1975 Birdseye U-12 MSA with Telonics X-12 pickup, Revelation preamp, Carbon Copy Delay and Hall Of Fame Reverb, Crown XLS 1002, 2- 15" Eminence Wheelhouse speakers, ShoBud Pedal, Effects Pedals. 1949 Epiphone D-8. |
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Clinton Zimmerman
From:
Memphis,Mo
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Posted 21 Apr 2016 8:38 am
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| Are replacing the caps a fairly easy diy project |
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Mike Brown
From:
Meridian, Mississippi USA
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Posted 21 Apr 2016 8:42 am Replacing caps on a Session amp
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I advise that you allow a tech to do this for you. You may send your amp chassis to us and our techs will do it. Our labor rate is $55.00 per hour, plus parts and return freight. Our service address is;
Peavey Service Center
Attn; Repair Department
412 Hwy. 80 East
Meridian, MS 39301
Please include your daytime phone number and a copy of this note of symptoms.
Mike Brown
Peavey USA |
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Mike Brown
From:
Meridian, Mississippi USA
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Posted 21 Apr 2016 8:57 am Session 400
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| If it still hums after you try what Tony suggests, please contact me toll free at 1-877-732-8391, ext.1180 to discuss more. I'll be here until 5PM CST. Could be a defective pan, but............... |
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Ken Fox
From:
Nashville GA USA
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Posted 21 Apr 2016 10:40 am
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No, not an easy DIY project on the is amp. The new caps are much smaller in length and rewiring may be required. Done a bunch, been there!
I would not hesitate to send it to Peavey, best money you can spend on the amp and will be done right.
Peavey simply has the best service department in the entire music industry!! |
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robert kramer
From:
Nashville TN
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Posted 21 Apr 2016 11:43 am
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| And I repeat: "Peavey simply has the best service department in the entire music industry!!" |
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Clinton Zimmerman
From:
Memphis,Mo
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Posted 21 Apr 2016 4:07 pm
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| Ok I want to try somethings and go from there. would really like to learn to work on amps for a hobby just ones I find that need repairs I have two already any thoughts on where to start? |
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Dennis Detweiler
From:
Solon, Iowa, US
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Posted 22 Apr 2016 5:07 am
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Basic knowledge of capacitors and resistors and soldering technique is a necessity. I can re-cap and replace resistors and test them. I took an interest in the mod kits and expanded from there. I've rebuilt a few vintage tube radios and upgraded a couple of my amps. I wouldn't want to work on someone else's gear. But, enjoy repairing my own with success. There's lots of information on-line.
_________________
1976 Birdseye U-12 MSA with Telonics 427 pickup, 1975 Birdseye U-12 MSA with Telonics X-12 pickup, Revelation preamp, Carbon Copy Delay and Hall Of Fame Reverb, Crown XLS 1002, 2- 15" Eminence Wheelhouse speakers, ShoBud Pedal, Effects Pedals. 1949 Epiphone D-8. |
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Lee Dassow
From:
Jefferson, Georgia USA
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Posted 22 Apr 2016 1:51 pm
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Peavey just went over my 500 recently. Not a lot wrong with it,but they fixed it,and they were extremely reasonable. Plus you have the satisfaction of knowing its fixed right. Tennessee Lee
_________________
2015 Mullen D-10 Royal Precision 9x8,-1990 BMI S-10 5x5-1972 Silver face Fender pro Reverb amp,-1965 Fender Super Reverb Amp,- 1966 Fender Showman Amp Two 15" JBL speakers,- 2006 65 Fender Twin Reverb reissue Amp,- 1982 Peavey Session 500 amp,-1978 Peavey Session 400,Goodrich Volume Pedals,John Pearse Steel Bars, |
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Clinton Zimmerman
From:
Memphis,Mo
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Posted 22 Apr 2016 3:44 pm
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| Thanks for the info guys,it looks good inside I'm sure it's a simple fix I will start with cleaning and put a ground on the cord. |
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