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 Post subject: Jewel 5310 info needed. PC-165 couplet schematic
PostPosted: Aug Sun 11, 2019 9:30 pm 
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Joined: Dec Sun 02, 2012 2:45 am
Posts: 26
Location: Milan, Indiana 47031
Hello. I am rebuilding a Jewel 5310 for a test bed for a inverter battery eliminator to measure rf interference. I have a Betmans schematic but it doesn't quite match what I have. The schematic shows a pc-160 couplet, but I have a pc-165. The schematic shows a battery saver switch that mine does not have. Also the build seems to be whatever surplus they could source that day. One 30pf coupling cap is obviously military surplus. The trials of working on a cheap radio.

Can someone point me to a listing of schematics for couplets?

Thanks,
Randy AB9GO


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 Post subject: Re: Jewel 5310 info needed. PC-165 couplet schematic
PostPosted: Aug Sun 11, 2019 10:14 pm 
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Joined: Jan Tue 31, 2012 1:55 am
Posts: 9894
Location: Mountains of Mourne. Ireland.
Centralab PEC (packaged electronic circuit) couplate PC-165 has all the same values as PC-160
It was "special construction to reduce stray capacities".
Image

------------

The Photofact for your radio Set-225 Folder-12 can be downloaded from radiomuseum.org
https://www.radiomuseum.org/r/jewelradio_5310.html
(In the right-hand scrolling window) Pages two, three, four and five descending are Sams.

Downloading from radiomuseum.org (non members).
Click a schematic page from the right-hand scrolling window, then again in the main center window.
Each page will be emailed to you immediately. You can only download three pages a day + up to a maximum of ten every 30 days.

If you experience any downloading difficulties... see this→ viewtopic.php?p=2571007#p2570117
pdf attachments are not visible in junk email folders.
pictorial - how-to→ http://a4.pbase.com/o10/56/215056/1/166 ... titled.png

Greg.


Last edited by egg on Aug Sun 11, 2019 10:34 pm, edited 2 times in total.

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 Post subject: Re: Jewel 5310 info needed. PC-165 couplet schematic
PostPosted: Aug Sun 11, 2019 10:21 pm 
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Joined: Jan Tue 31, 2012 1:55 am
Posts: 9894
Location: Mountains of Mourne. Ireland.
Before you replace your couplate, read this thread...
viewtopic.php?f=19&t=351431

Rebuilding on a Perf-Board/Prototype Board...
viewtopic.php?p=2974966#p2974966

Greg.


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 Post subject: Re: Jewel 5310 info needed. PC-165 couplet schematic
PostPosted: Aug Sun 11, 2019 10:25 pm 
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Joined: Dec Sat 24, 2011 9:17 pm
Posts: 4826
Location: Vancouver Island, Canada
Hello, I hope you get that info, but if not, the Model 5010 has the same basics but has all discrete components.

http://www.nostalgiaair.org/pagesbymode ... 009719.pdf

Unfortunately the data base doesn't cover your later version.

I'll bet there are minimal differences between PC 160 and PC 165, and the radio will likely play fine with the original configuration.

Good luck with testing and perfecting the power supply.

_________________
Watch the doughnut, not the hole.
Burl Ives, RIP, oldtimer.
[:l>)


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 Post subject: Re: Jewel 5310 info needed. PC-165 couplet schematic
PostPosted: Aug Mon 12, 2019 1:23 am 
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Joined: Dec Sun 02, 2012 2:45 am
Posts: 26
Location: Milan, Indiana 47031
Thanks everyone for the info. The couplet is not bad thankfully. I had to replace one tube socket (1R5) as some dummy used solder paste on a solder joint from the metal bracket holding the tunning cap to the PCB. The vapors caused the socket to corrode and a pin to break off. In the hoard I found an exact replacement. Boy those pcbs are awful. Look at the traces and they lift. I'm even using a good temp controlled solder station. I find it hard to believe that PCB manufacturers couldn't do better than this? :roll:

Anyway it now plays, but it is not very sensitive especially on the lower end of the dial. It is actually dead down there. The osc is running and the Variable cap is not shorted. The sensitivity just falls off. I have touched up the alignment and the IF transformers are not open. Any ideas?

Thanks,
Randy.


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