Ray, I've been looking forward to the rest of the restoration of thie AU-719. Thanks for posting. You mentioned re-looming the wires. If you want to replicate the factory look, here's an article in Audiokarma about how to do so.
Thanks! Thing threw me a few curves I didn't mention. First was when I was using a 1/4" headphone adapter, which chose to come apart when I tried to remove it, necessitating the removal of the head jack and disassembly to removed the pieces. Second was the traces on the control board were extremely delicate, much more so than usual even for vintage gear, and 2 eyes detached from their traces. I found and fixed them, but it was not fun.
Nice explanation of the tone controls, thanks Ray ! I believe you can use noise and a FFT to give you idea what's going on as well. Proper good work here and an interesting tutorial...cheers!
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Nice restoration job ! What is your method for the input jacks cleaning ?
I used Happich Simichrome polish with buffing cylinders made for cleaning jacks for the telecom industry.
To get the rust out of the pores, phosphoric acid works very well.
You know, I'd heard of that stuff but never used it. Thanks for bringing it up, I'll try it on the next one!
Nice ... I'm actually impressed.
Ray, I've been looking forward to the rest of the restoration of thie AU-719. Thanks for posting. You mentioned re-looming the wires. If you want to replicate the factory look, here's an article in Audiokarma about how to do so.
Jeff, I don't see a link here.
Hey ray what was the part number that you installed in place of the black flag cap 22pf..thanks glenn
Hi Glenn! Those are Murata RDE5C1H220J0P1H03B, obtained from Mouser.
Ray i also noticed the transformers on your unit are unshielded the ones on mine are shielded your's must have been a earlier model
@@atw4321 I've never seen shielded transformers on a 719, only the 717 or 919. Maybe they put them in later models like you say.
Kudos
Thanks! Thing threw me a few curves I didn't mention. First was when I was using a 1/4" headphone adapter, which chose to come apart when I tried to remove it, necessitating the removal of the head jack and disassembly to removed the pieces.
Second was the traces on the control board were extremely delicate, much more so than usual even for vintage gear, and 2 eyes detached from their traces. I found and fixed them, but it was not fun.
Good night from Spain.
Good Night, Salavdor. I'm probably not going to be up much longer myself!
@@raygianelli3612 rest a little 😴
Nice explanation of the tone controls, thanks Ray ! I believe you can use noise and a FFT to give you idea what's going on as well. Proper good work here and an interesting tutorial...cheers!
Thanks Andy. Good tip about using noise and an FFT for this task. This is why I always try to read the comments. I'm still learning too!