Calling All "Vintage" Integrated/Receiver Owners
Jun 28, 2014 at 10:17 AM Post #12,811 of 19,136
I got the output driver boards on the SX-1250 recapped with a combination audio grade electrolytic and film caps. Also re-soldered and cleaned the connector pins and boards over the last few days.  Put everything back together and fired it up.  I was a little worried at first as there was some harshness (used silver solder so that was a concern) and not as much punch - but I now attribute this to part of the break in process as it is starting to smooth out with more and more weight and detail behind the music.  Here is the completed right output board:
 

 
Jun 28, 2014 at 4:05 PM Post #12,812 of 19,136
I won this off that ubiquitous auction site this week.  A Sherwood S-8900A.  Very nice sound, FM only, 60WPC, and in beautiful cosmetic condition.  The only thing I had to do was replace three bulbs.  $49 shipped.  Given that all the radio money goes into a quality FM tuner I am very optimistic because I listen to it quite a bit.
 
May end up replacing my tricked out S-7100A if the sound is good enough.   Here is a pic:
 

 
I might add it is built like a tank in the US - Chicago!  Approximately 23 pounds.
 
Jun 28, 2014 at 4:42 PM Post #12,813 of 19,136
Very nice SpeakerBox, And a hell of a bargain!  
 
Jun 28, 2014 at 4:55 PM Post #12,814 of 19,136
Thanks LugBug!  I never get tired of the hunt for new (ah I mean old) stuff to play with.
 
Jun 29, 2014 at 2:08 PM Post #12,816 of 19,136
Nice job.  Looks great!
 
Jun 29, 2014 at 3:02 PM Post #12,817 of 19,136
Jun 29, 2014 at 3:47 PM Post #12,818 of 19,136
Deoxit is on sale for under $10/5oz can from parts express. I'm getting a mixed case because that's a great price. I figured you guys might also want to know that. 
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Cheers
 
Jun 29, 2014 at 4:16 PM Post #12,821 of 19,136
Thanks, the LED job was super easy. It turns out that pinball machine lamp to LED replacements are the perfect fit/ spec for this amp, nice and cheap too!

Edit: I don't mean to sound like a smug got but I only paid £20/$30 for it.

You would normally be looking at £200-300 for one of those in as good condition... Seriously!  
 
Jun 29, 2014 at 6:00 PM Post #12,823 of 19,136
  Deoxit is on sale for under $10/5oz can from parts express. I'm getting a mixed case because that's a great price. I figured you guys might also want to know that. 
regular_smile .gif

Cheers

 
Thanks Phoenix - I think mine is about to run out.
 
Jun 30, 2014 at 7:06 AM Post #12,824 of 19,136
I like the ~1982 JVC/Victor A-X55 so much it needed a friend.
A-X77
VICTOR A-X55の仕様 ビクター
No way I could turn down the shipped price of the spare, and it was local also.
Popped the top off to have a look and the new one had shot pre driver amp board caps. Nice mess to carefully clean up.
The good amp on the bottom had failing ones also not as bad. Both older Elna. So I pulled them out and replaced them with Philips Vishay.
 
Initially had got it for spare parts just in case, but it will replace the Nikko in the bedroom setup to keep it used from time to time. That Nikko will be gifted to infect a friend with the vintage receiver bug after I check it out and adjust offset.
Top one still needs a cleaning, and I will duplicate the lower flap and make a TRS jack access hole at the same time..

 
There's a couple of matching tuners around but not sure I would ever bother with those.
 
Jun 30, 2014 at 9:55 AM Post #12,825 of 19,136
Nice job.  A quick look at the schematics will tell you which electrolytic caps are in the signal path.  I like to replace these with film if possible or audio grade electrolytic caps (usually 105C and at least matching the current voltage rating - but usually one step higher).  The sonic signature will improve drastically with this mod.
 

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