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Avalon 737 preamp, need to test transformer...
Avalon 737 preamp, need to test transformer...
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Old 17th April 2019, 01:50 AM   #1
gbkd80 is offline gbkd80
diyAudio Member
Join Date: Apr 2019
Default Avalon 737 preamp, need to test transformer...

Shot in the dark here, since there are no schematics to speak of or locate anywhere:

I have an Avalon 737 on my bench that has just enough trickle power to fire up the VU bulbs but nothing else. I found at least one bad cap in the power supply so I plan to replace them all but I found that the connector from the transformer had scorched / arcíd or something. I donít know if the transformer is bad or not. But before I drop 180$ on a replacement, is there a surefire way I can test the existing one and be sure itís safe so i can get away with just a supply re-cap? I did test the tubes with the help of a buddy who has a good tester and they all worked but they are very weak.. in all fairness Iím trying to avoid eating the cost of a transformer I canít return, especially at that price. Ideas?
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