Pioneer SX737 with long time issues-relay clicking in and out and more.

[@g.fortin3228]

LOVE this one Joe ! I have restored one , also was my own Dad's and replaced a lot of parts ...complete restore except for a handful of transistors. And I didnt mess with the tuner much, few caps and left that alone. What memories this brings back of when I did that especially the damn misprint misleading to the wrong pins. Really love that receiver , paired with the right speakers it really rocks !

[@tfs1150]

Awesome! I bought my SX-737 in 1974! It was the star of many parties :) It sits in its original box downstairs. I should get it out and fire it up to see how it is doing. Thanks for the great video.

[@VintageAudioFever]

You should take it out of the box....

[@lloydgreen4091]

As an Ol' Tube guy & Newbie trying to learn solid state this video has been Very Helpful. One of Your Best for a Noob like me. Thank You Joe for making these videos for us.

[@VintageAudioFever]

I really appreciate the feedback!

[@yvileye]

Well done 👏 c'était un plaisir à surveiller avec mon café du matin 😅

[@davidbailey6350]

Bought a 737 new in the 70’s…. Still Rocks…

[@mdelabo]

Good vidéo 👍 I am from Belgium I wark on a Pioneer sa 7500 now With some difficulties. M from Belgium

[@VintageAudioFever]

What is the issues your having?

[@FrancescoCalazzo]

Joe is a rock star! Joseph est une star! Personne exqui! Merci, thanks!

[@VintageAudioFever]

Merci Francesco...but it has return to my bench. Oh well another video coming.

[@p4spooky]

Great job. The STV4H are as rare as hens teeth. Glad you had the originals to replace the hack job by the previous technician.

[@LZDEN]

splendid work Joe,you are for sure a very good repair man.

[@timcorner2821]

Another great video Joe.This one was a bit tricky, but you got it sorted for the guy. I'm sure he's going to be very happy. A great old receiver put back into action.

[@tompas11A3n52KkX]

Great repair! The SX-737 is one of Pioneers best sounding receivers. How I know? I own one.🙂

[@VintageAudioFever]

Yes, it is!

[@sergiogamba817]

Excelente calidad de contenido. Entretenido y buena reparación 🎉🎉 Felicitaciones!!

[@Daltondoubledeuce]

Nice job Joe, learn something each time. Cheers.

[@VintageAudioFever]

I really appreciate your comment!

[@bobisyouruncle1]

Awesome video, again. I like the slo-mo sections as well. Cool stuff.

[@michaelburak1484]

Always great! I've got a few pieces I'm working on and I know my way around a schematic. I'm not sure about the process flow to diagnose problems. But I keep watching and hoping to learn more and more.

[@AudiophileStooge]

great tech work! and very educational

[@VintageAudioFever]

Thanks! Glad you found it helpful.

[@minigsreiter9850]

It´s always the last ;-)! I am really enjoying your videos! Always thumbs up! Greetings from Germany.

[@VintageAudioFever]

Thank you very much!

[@fridaythe13thpartx]

Learned a lot from watching you tackle these jobs,thankyou.Great job on this baby!I've got one of these in my vintage collection and love the look and the sound!Not sure if you've done it yet but your subscribers would love to see a video someday of your own personal set up and go to vintage gear!

[@VintageAudioFever]

Hey!!! Sure I will do a video of my equipment soon...

[@campion05]

Morning Joe with Joe!

[@VintageAudioFever]

Morning 🌄

[@lloydspivey8296]

Curious as to where you obtained the service info on that unit? Nice video as well.

[@apolinarmartinez5723]

Great video, regards

[@VintageAudioFever]

Thanks for watching!

[@transformateur9969]

Thanks ! nice work ! 🙏👍❤

[@VintageAudioFever]

I appreciate it!

[@voenigs612]

It would have been interesting to test the transistors with a VI curve tester. It makes damage visible, especially in semiconductors, that cannot be detected by a multimeter or transistor tester. 👍

[@glendetlefsen7206]

Nice video. Just wondering with all the repairs you do, how come you don't have a powered vacuum desoldering tool? Makes it so much more enjoyable to work with one, in my opinion.

[@VintageAudioFever]

Id love to have one yeah!!! But not in my budget at the moment.

[@Si1983h]

Was that last transistor you changed the one driving the relay by any chance? In my experience, it’s a very common issue for that to fail on mid/late 70s pioneer units. For whatever reason, they didn’t fit a flyback diode so over time, the relay kills the transistor driving it. I’ve changed that transistor with a modern equivalent (can’t remember the part number, ZTX something), but I also fit a flyback diode across the output to drain any flyback voltage to ground. I’ve never had one come back… not touched one at all in nearly 10 years though because I’m too busy elsewhere.

[@Wil_Bloodworth]

Nice work Joe. It must be a regional thing to refer to things as "my" instead of "the". i.e. "They are in direct contact with MY voltage regulator...". I just find it interesting. Do you live in the North or Canada?

[@sammaze2103]

Joe. Did you get my answer? I am in West Virginia along the Ohio River !

[@VintageAudioFever]

I did received your text Sam

[@capriracer351]

I had a nearly identical problem with my Pioneer SX5570 on the protect circuit. It also turned out to be the 2SA733 transistor. It tested good with the low voltage testers, but using a higher voltage transistor leakage tester, the E-C junction was breaking down at a fairly low voltage. I actually did a video demonstrating how several different transistor testers showed that transistor to be good, but the two test devices I used towards the middle and end of the video showed the failure mode (breaking down at a low voltage, but at a higher voltage than most transistor testers use to test the transistor). If anyone is interested in my long, plodding and admittedly boring video on this, here is the link: kzbin.info/www/bejne/r4ianWqXhKlpoqssi=BwWBnHuJxjeGNCJJ

[@ronaldfriedline9297]

Every once in a great while, my 737 relay will click in and out too. But otherwise works great. Not sure why it happens. Relay also makes a slight "pop" noise through the speakers after first turning it on. Any explanation?

[@VintageAudioFever]

It's either your relay is detecting DC voltage ⚡️ or your relay may need cleaning/replace...note when it's doing it...

[@jefftobin4034]

So where did you get those STV4H varistors?

[@VintageAudioFever]

You can still them on ebay for about 100$ piece

[@sammaze2103]

Joe. How can I get a hold of you for some work. Are you on Facebook? Thanks

[@robertdavis5714]

THE GLOVES..........................................WTH

[@VintageAudioFever]

Hi Robert....not sure if this is a question? Or a comment!

[@sammaze2103]

Joe. How can I get hold of you for some work? Are you on Facebook ? Thanks

[@VintageAudioFever]

Where are you?