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Author Topic: Norelco Amp Questiona Gary Crawford Expert Film Handler Posts: 200 From: Neptune NJ USA Registered: Nov 2003 posted 03-03-2009 07:36 AM                     Hi guys, been a few months since I've been by. I have a Norelco wall mount amplifier, type EL 5341/10, model M2A, the "suitcase" amp that switches out real fast. I believe I lost a power transformer, the tubes won't light up. I have a spare third unit to cannibalize. I changed all the tubes (2- PL36 and 1- 12AX7A), and the fuse, that didn't help. The little lights still work, so there is power there. The transformer is marked V3 622 95.0, one has T-113 and the other has T-365. Is there a manual available for this unit? I looked here for one, nothing listed. Also, any hints as to my problem? Maybe something else is wrong? Also, a source for these tubes? PL36 and 12AX7A. Thanks guys. My email: crawsat@juno.com  |  IP: Logged Rick Raskin Phenomenal Film Handler Posts: 1100 From: Manassas Virginia Registered: Jan 2003 posted 03-03-2009 09:13 AM                     First clue is the tubes don't light. Check the filaments to see if there is voltage present. PL36 filament is on pins 2 & 7 and 12AX7A is pins 3 & 5. Not being sure of how they are wired it is helpful to know that the PL36 is a 25 volt filament and the 12AX7A is 12 volts. That brings up the possibility that the two 12 AX7As may have their filaments wired in series and then connected a 25 volt winding. It is also possible that all of the tube filaments are in series and connected to one voltage supply. Just Google the tube type -- there are lots available on the Net. Good luck... ---Rick  |  IP: Logged Gary Crawford Expert Film Handler Posts: 200 From: Neptune NJ USA Registered: Nov 2003 posted 03-03-2009 09:06 PM                     Thanks Rick. Found PL36 tubes online already, seems to be enough out there. A friend has a couple 12AX7A's. Thinking I'll change out the transformers, that's what an Altec tech I know suggested. 6 solder joints and 4 bolts, easy enough to try. Thanks for the tips on the pins. I lost audio the other day for about a minute, and then it came back, without finding the problem. Then Sunday I lost audio completely, changedout the amp and had it back. It's been suggested that the transformer lifted, cooled, and then reconnected and I had audio again first time, second time was the end of the little black box. Thanks again, Rick. I'll let you know what happens.  |  IP: Logged Aaron Sisemore Flaming Ribs beat Reeses Peanut Butter Cups any day! Posts: 3061 From: Rockwall TX USA Registered: Sep 1999 posted 03-08-2009 11:40 PM                     The 25E5/PL36 and the 12AX7s should be readily avaialble - Try Antique Electronic Supply or Tube Depot . -Aaron  |  IP: Logged Louis Bornwasser Film God Posts: 4441 From: prospect ky usa Registered: Mar 2005 posted 03-09-2009 06:15 AM                        Any good dealer should be able to buy from Richardson Electronics, maker of most tubes. (USA) Louis  |  IP: Logged Hans Van Der Vlist Film Handler Posts: 16 From: Rotterdam, The Netherlands Registered: Aug 2005 posted 03-13-2009 09:45 AM                     Hello, If you need a service manual for your amplifier Norelco EL3541 you can order it here: http://www.agtannenbaum.com/n_cat.html hope this will help! Hans.  |  IP: Logged

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