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Pacific's Restorations You can see all of Pacific's vintage gear restorations here.

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Old 11-02-2012, 02:23 PM
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Pacific Stereo Pacific Stereo is offline
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Pacific's Reference 180R (Quadraflex) Repair/Restore, pics!

Another Quadraflex saved from having to go to stereo heaven! Just got done with one of these little beauties. This one came in blown up and not working. A look inside revealed quite the meltdown.



Not only did this thing bias itself into patty-melt oblivion, but that transistor got so hot it melted the plastic insulating bushing where the screw goes. Never seen that before. The output stage also took the main bridge rectifier with it.

This unit had never been serviced and has obviously been out in the real world. It had the usual dust and dirt inside.



This customer did not want a complete overhaul and rebuild, but rather a repair and upgrades to keep reliability high. So this unit got a complete rebuild on the blown-up side and a partial rebuild on the not-blown-up side (replacement of the items that cause this, and a recap). The capacitors in this unit are most definitely past their time. Caps in the power amplifier stage and power supply were changed out for high-quality parts.



Here's the parts. Missing the main fuse, as that had already been taken out by the owner.



A little clean-up and she looks much better inside. The input electrolytics were changed to film parts (they're by the bias pots).




Testing revealed that there was no stereo in FM. Joy. Of course, the customer wouldn't have known that, since he couldn't play the unit! As FM repair was not part of the original estimate, this customer got a little free bonus. Now FM is in stereo.

Here's a look at her all lit up.



And of course, what would a Pacific thread be without the glamour shots?





All in all, a good-sounding little keeper, and very pretty. Back to making music she goes!

Photos copyright 2012 Pacific Stereo. No use for any purpose without written permission.
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I RESTORE VINTAGE AUDIO AND VIDEO GEAR. Master technician for Concept, Quadraflex, Calibre, Pioneer and Sony. Endorsed by Richard Schram for Concept product restoration. Factory technician for both Yamaha and JVC. Sonics consultant for Denon. Pacific Stereo store manager, service manager, Central Service lead tech, liquidator at our demise. Pacific Stereo curator. Infinity IRS dealer. Music buyer for one of the first CD retailers in the USA. Authorized servicer for virtually every brand on the planet at one time or another. Music addict. Mastering & recording engineer, weaned on a Neve (no other console sounds like a Neve!). Industry-respected ears. Head Tapehead.

Need vintage audio & video repair and restoration, or unobtanium semiconductors and parts? Ask me! And do visit the website: pacificstereo.net

Last edited by Pacific Stereo; 11-04-2012 at 08:21 AM.
  #2  
Old 11-04-2012, 02:53 AM
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Soul Music Soul Music is offline
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Great job, nice to see a good piece of vintage audio equipment brought back to life.
  #3  
Old 11-04-2012, 08:59 AM
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Socal Sam Socal Sam is offline
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Another obsessive restoration from P.S.!

How does the sound quality change from pre and post re-caps?
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Old 11-04-2012, 09:02 AM
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ke4mcl ke4mcl is offline
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those quadraflex units look ALOT like something nak would have built. i wonder if there was ever friction between the two design departments?
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Old 11-04-2012, 09:40 AM
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Pacific Stereo Pacific Stereo is offline
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Well, I have no reference (hah!), since I haven't heard a 180R since.. oh... 1982? And this was blown up, so it couldn't be listened to without repair. But in my experience, recaps always make a very big difference, usually in the punch and speed department. Clarity improves and bass almost always changes, and always for the better.
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pacificstereo.net "Make your own kind of music!"



I RESTORE VINTAGE AUDIO AND VIDEO GEAR. Master technician for Concept, Quadraflex, Calibre, Pioneer and Sony. Endorsed by Richard Schram for Concept product restoration. Factory technician for both Yamaha and JVC. Sonics consultant for Denon. Pacific Stereo store manager, service manager, Central Service lead tech, liquidator at our demise. Pacific Stereo curator. Infinity IRS dealer. Music buyer for one of the first CD retailers in the USA. Authorized servicer for virtually every brand on the planet at one time or another. Music addict. Mastering & recording engineer, weaned on a Neve (no other console sounds like a Neve!). Industry-respected ears. Head Tapehead.

Need vintage audio & video repair and restoration, or unobtanium semiconductors and parts? Ask me! And do visit the website: pacificstereo.net

Last edited by Pacific Stereo; 11-04-2012 at 09:49 AM.
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