PDA

View Full Version : Need info on a Power transformer


5150loveeddie
08-28-2006, 02:27 AM
D.E Ltd T3560 found in 50w 1987 Marshall.

Need info on the wiring of each terminals

5150loveeddie
08-28-2006, 02:29 AM
http://img242.imageshack.us/img242/3949/pt50wap1.jpg

Here is the PT in qts!!

So far I got:
Terminals 3&5 are HV (320VAC each)
4 goes to ground (CT)
7&9 are for the Heaters (3.2VAC each)
8 CT (heaters..)

Need to know the rest!!

Many thanks!!

tonezoneonline
08-28-2006, 09:24 AM
Shoot me an email and I'll send you a schematic and wiring diagram.
Include the model number is the amp?

5150loveeddie
08-28-2006, 03:14 PM
Thanks Mike but it ain't that one you send me, It doesn't have any primary wires......only 9 terminals!!!

Anyone else??

tonezoneonline
08-28-2006, 03:56 PM
Probably because it's an non original transformer.The 1987's had a 1202 transformer.

5150loveeddie
08-28-2006, 04:12 PM
Yep, that's it, or it might have something to do with the Canadian market in the 1970's!!!!!!

Thanks anyways!!!!

donnyjaguar
08-29-2006, 08:48 PM
Didn't the EL34 become 6550 tubes before they hit the retail stores in Canada? I recall reading that somewhere. Not a Marshall guy here - never had a hankering for one despite my love of cock rock and hair metal.

5150loveeddie
08-30-2006, 11:14 AM
Yeah it did............el34/6550

Problem is resolved with that PT...

For those interested
-Terminal 1 is the higher primary tab (B+, heaters will be affected, 415/420VDC, 6.6VAC), and should be jumped to power switch.
-Terminal 2 is hook to wall current
-Terminals 3 and 5 are the HV
-Terminal 4 is the HV center CT (goes to ground)
-Terminal 6 is the lower primary tab (B+ = 390/400VDC, heaters are a low at 5.9/6VAC in my case..it should be jumped to the power switch instead of terminal 1 for lower B+
-Terminal 7&9 are the heaters
-Terminal 8 is the heaters CT (goes to ground)
- no bias supply so use one side of the HV (pin5) and use a 220k/100k resistor (depending if you are using the higher or lower HV set up) prior to the diode in the bias current line......