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SX-1250 Restoration in 2019 - Who's Doing It?

Looking great! What the heck is that bahimuth in the background!?

Did you swap out any of the higher wattage resistors?
 
So far: Just replacing the caps and wonky transistors. It looks like its never been turned on.
I don't see a need in replacing the resistors.

I have an order in process with the back order. Then I found some 647-TVX2A471MCD in a stash, so I'm moving forward.
Flat amp done - working the control amp.
 
MIJ_Pioneer said:
That twin reverb is nice. Have one myself, gets very loud.

I have a decent cap list on page 2 of my 1250 rebuild if you needed a good starting point. Plenty of other cap lists as well.
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I’m doing the ultra linear twin reverb 78 model, hell yes it’s loud. I’ve almost got the 939 done and have my bom for the 1250 for the parts I don’t have in stock so here shortly I’ll be cruising in my Plymouth duster jk I drive mustangs and ride harleys all vets do lol. Thanks so much again for your assistance!

steve
 
I did a few of those and other Twin Reverb amps over the years.
The funny thing is I kept the only Twin that didn't pierce my ears.

I've got a donor chassis for another that I need to finish
as it will be configured for 4x 6V6 with a Jim Kelley Transformer.
The JJ 6V6 are like Mini 6L6s.
 
USMC Spike said:
I did a few of those and other Twin Reverb amps over the years.
The funny thing is I kept the only Twin that didn't pierce my ears.

I've got a donor chassis for another that I need to finish
as it will be configured for 4x 6V6 with a Jim Kelley Transformer.
The JJ 6V6 are like Mini 6L6s.
Click to expand...


Dang, sounds like that’s gonna be a screamer! Semiper Fi btw.
 
After several weeks of ontacting/attempting to contact guys who supposedly want to restore these units, I can now say it was a rel eye-opener! My list of 8 people went down to just 2 candidates within a 2 week timeframe...
 
Dang, well, I guess I’m on my own but I’m not sweating it, there’s either interest or there’s not and I’m sure a lot of the guys have their plates full with their own jobs and customers. Trust me, I’m in no way afraid to go it alone or failure as that’s just not an option with me.
 
SteveHammond said:
Dang, well, I guess I’m on my own but I’m not sweating it, there’s either interest or there’s not and I’m sure a lot of the guys have their plates full with their own jobs and customers. Trust me, I’m in no way afraid to go it alone or failure as that’s just not an option with me.
Click to expand...

PM'ing you.
 
I have a 1250 that’s in the cue right behind an sx-939 that I’m almost finished with. I just have to finish the tuner board and do an alignment, let it burn in then I can start on the sx1250. I’m kinda like the cobblers kid, I walk around barefoot lol. I just purchased an old clunker marantz 2252b to restore but I have to do that outside of normal work hours lol. Wait? I make my own hours! Lol, the wife don’t like em but hey it’s my therapy and you know what they say about wives, they’re kinda like Tin roofs if you don’t nail em every once in a while they’ll end up over in the neighbors yard! I love my wife though, she’s very supportive and actually gets veteran humor (it’s very dark you know!) now back to our regularly scheduled programming, that is all!
 
SteveHammond said:
I drive mustangs and ride harleys all vets do lol. Thanks so much again for your assistance!
Click to expand...

Not all of us vets! I drive a Camaro and ride Kawasaki's, but I like to go fast and quick! Hello from the other end of Tennessee!

Oh yeah, I also have a 1250 that needs a complete restroration. You know, a fellow could probably make a little cash restoring these things on the side. :rolleyes:
 
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jbrainey said:
Not all of us vets! I drive a Camaro and ride Kawasaki's, but I like to go fast and quick! Hello from the other end of Tennessee!

Oh yeah, I also have a 1250 that needs a complete restroration. You know, a fellow could probably make a little cash restoring these things on the side. :rolleyes:
Click to expand...
That’s why I do it, trust me a little extra cash is all I get, I do this mostly for therapeutic reasons as A: it keeps me awake so I don’t sleep too much and B: to keep my mind focused and occupied. I don’t want to sit around drooling on myself throwing pity party’s, I’d rather help out people where I can, especially fellow veterans. So you say you ride Kawasaki’s and drive Chevrolet’s? God, you have to be navy because you wanna be like Tom cruise in top gun! Lmao! Jk brother, hello from East Tennessee where the liquor is 10 a jar and your woman is most likely your cousin or sister
 
I just finished boxing up the SX-1250 Michael sent me.
The boxing and packing he did was phenomenal.
We decided to stick with the original incandescent lamps, keeping the original Pioneer intent. The set is so pristine, keeping the original intent seemed the wise decision.
I didn't modify the Stabilizer board, adding any extra heatsinks. It operates and cools fine with the modern components installed.
Working the receiver was a small challenge, only that I wanted to keep the hardware in the same spots and not damage anything. I use the same caution on all my work but this made me nervous. It was nice to see an actual 1250 that was never opened giving me a first hand look at the set as it came from Japan.
Michael has a one of kind Pioneer receiver, original box and all. Making it operate and reliable for the next generation was my luck. What a treat to rebuild.

The issue causing the protection to cycle was a component in the Flat amp. Which one was it? Not sure because I replaced all the caps and transistors in both the Flat and Tone amps. A wise choice for any who verify the pre-amp section has a fluctuating voltage on the channels signal circuit (No inputs, volume at min). The amps were working correctly.

DSC05953.JPG
 
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zebulon1 said:
I just finished boxing up the SX-1250 Michael sent me.
The boxing and packing he did was phenomenal.
We decided to stick with the original incandescent lamps, keeping the original Pioneer intent. The set is so pristine, keeping the original intent seemed the wise decision.
I didn't modify the Stabilizer board, adding any extra heatsinks. It operates and cools fine with the modern components installed.
Working the receiver was a small challenge, only that I wanted to keep the hardware in the same spots and not damage anything. I use the same caution on all my work but this made me nervous. It was nice to see an actual 1250 that was never opened giving me a first hand look at the set as it came from Japan.
Michael has a one of kind Pioneer receiver, original box and all. Making it operate and reliable for the next generation was my luck. What a treat to rebuild.

The issue causing the protection to cycle was a component in the Flat amp. Which one was it? Not sure because I replaced all the caps and transistors the both the Flat and Tone amps. A wise choice for any who verify the pre-amp section has a fluctuating voltage on the channels signal circuit (No inputs, volume at min). The amps were working correctly.

View attachment 1717431
Click to expand...
Very nice Zebulon, that must have been a real treat! Congratulations on getting that job!
 
I can't wait to get my zebulon restored SX!

Robert was texting me throughout his repair/restoration. I gotta say it's pretty cool when someone (who does restoration quite often)
offers up reassuring comments about the condition of my SX and the way it's performing.
 
Hi all, I recently purchased a SX-1250 in nice working/cosmetic condition, but it also could use a full restoration to get it sounding its best.

I am located in the Los Angeles area (West Covina) and wonder if there are any reputable folks from the AudioKarma community within driving distance that you would recommend reaching out to to take on this job? I currently have the amp powering a pair of 1990s Klipsch Chorus II speakers with a Realistic LAB-400 turntable. I've included a couple pictures for reference.

I'm new to this forum, and would greatly appreciate any suggestions and/or recommendations. Thank you!
 
merlynski said:
Zebulon1 is in Las Vegas, NV, less than a five hour drive, and a long time AK member. While I do my own electronics repairs, I would be quite comfortable having him work on my beloved equipment. PM him for further info.
Click to expand...

Thanks for the recommendation! I'll be sure to reach out to Zebulon1.
 
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