I bought a Magnavox Stereo 300 tuner amp recently. I bought it to get back a few of the electronics repair skills I had 50+ years ago. (Anybody remember vacuum tubes in cheap radios?) This tuner amp is transistorized.
I have traced the issues to a failed power transformer. The Sams manual I purchased says it is a 117vac primary with two secondaries: 44 vac and 6 vac.
The transformer coils are not shorted together or to the core (measured with my multimeter.)
The Sams manual says the 44 vac secondary should have 5.2 ohms (reads 1.1 ohm) and the primary 30 ohms (reads 17.9 ohms.)
I persuaded myself the problem was in the power transformer by applying -28 vdc from the output of the two rectifiers to ground.
That being said, I would like to purchase a power transformer and I do not know how to search for one with the appropriate criteria.
Please help.
I have traced the issues to a failed power transformer. The Sams manual I purchased says it is a 117vac primary with two secondaries: 44 vac and 6 vac.
The transformer coils are not shorted together or to the core (measured with my multimeter.)
The Sams manual says the 44 vac secondary should have 5.2 ohms (reads 1.1 ohm) and the primary 30 ohms (reads 17.9 ohms.)
I persuaded myself the problem was in the power transformer by applying -28 vdc from the output of the two rectifiers to ground.
That being said, I would like to purchase a power transformer and I do not know how to search for one with the appropriate criteria.
Please help.