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#hifi

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Current patient: Harman-Kardon PM655 Vxi.

At the moment the right channel is only about 5% of the volume of the left one. Since this amp can be split (pre- vs. main amp) it was easy to find the problem is with the main amp section. Next step is to figure out what's wrong. There are several options, like a broken rail voltage supply or one of that ~15 transistors that precede the main output ones (those I've already checked).

Several years ago, my FIL made me a gift of all his #hifi equipment, since he and his wife were downsizing. The crown jewel of his setup was a Transcriptors Skeleton turntable. It needed some love, more love than I could give it, but I was lucky enough to find a local tech who has restored multiple Skeletons. He did a heck of a job. I picked it up this weekend.

I lost count of how many records we listened to yesterday, well into the night. #audiophile #vinyl

Saturday morning's work: recapping assorted boards of a hifi amp, resoldering all the thermally/physically stressed joints and a few dodgy looking ones. Then a thorough PCB wash and how stuff is drying.

If anyone can guess the amplifier model, you win one (1) brownie point.

Finally scratched my itch to get a record player and some vinyl. I debated about getting a vertical player (for example the Fuse Vert) but decided against it based off "the expert opinions". I ended up with a AT-LP60X and Edifier R1280DB speakers. #vinyl #turntables #hifi

Now to go spend even more money on records :) I have no idea what I am getting into!

On the bench today: A B780 I bought last weekend as defective with a badly distorted left channel (the negative part of the waveform was missing). First evaluation: Distorted left channel on headphones out, but not on preamp out, so it must be a fault on the left power amp. Missing half wave excludes a dirty relais, potentiometer or switch. #repair #hifi #vintage #revox