Good call on those bias trimmers. I've rebuilt more than a few of the early Pioneers, and about 40% of them come to me with bad bias trimmers and shorted outputs. Love the sound. I have an SX-2500, which I won't be parting with.
Yes, it is strange. Who knows how the owner treated this receiver. I believe it did have something spilled on/in it at some point so that may have something to do with the problem.
Hi Wil, Excellent vid! What is the frequency of your Ultrasonic cleaner? I have damaged some solid aluminum knobs using an ultrasonic cleaner that is 40kHz (55c for 20 min) and read that you need 78kHz for aluminum.
Good call on those bias trimmers. I've rebuilt more than a few of the early Pioneers, and about 40% of them come to me with bad bias trimmers and shorted outputs. Love the sound. I have an SX-2500, which I won't be parting with.
I probably should’ve replaced the rest of them while I was in there. Thanks for watching.
@@Wil_Bloodworth I have never seen a DC balance trimmer go bad in this series. Go figure.
Yes, it is strange. Who knows how the owner treated this receiver. I believe it did have something spilled on/in it at some point so that may have something to do with the problem.
This new channel is off to a terrific start. Well done! I look forward to parts two and three.
Thank you Peter! I hope I don't disappoint.
Woo hoo comment #1 and subscriber #3 💪🏼. Got a feeling this is gonna be a great channel, love these helpful vintage audio repair vids.
Thank you very much for both commenting and subscribing!
@@TheMakerShopTech really looking forward to seeing the next episode.
@@Daltondoubledeuce you're in luck as I just released video #2 last night. :)
I would replace all trimmers, they fail often. In my SX-990 I used BC161/141 for TO-39 transistors. Good job!
That is a great idea Paul. Not sure why I didn't think of that. Thank you!
Hi Wil, Excellent vid! What is the frequency of your Ultrasonic cleaner? I have damaged some solid aluminum knobs using an ultrasonic cleaner that is 40kHz (55c for 20 min) and read that you need 78kHz for aluminum.
Hi Steve, it's 40kHz. I haven't heard about the 78kHz cleaners so I will look into that. Thank you for watching and the comment!