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 Post subject: g.e. mystery radio.
PostPosted: May Sat 11, 2019 1:15 am 
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Joined: May Wed 31, 2006 6:41 am
Posts: 255
i just found this radio looking for something else in my junk stash.

this radio was at my grandmother's house and i know it was in service until mid 80's.
when i was a kid i saw it working.

Years later i found it and took it home to repair it. i remember it powered up, but it had no sound. also the cone the speaker was broken

time has passed and never reapired it.
in 2010 i had it on a shelf and it fell because of a big eartquake.with this fall the ballast tube broke ( the metal one on the right) it looks complete but is broken.

I have all the knobs for this radio. the cabinet is in good shape, but the finish is ugly. also the back is missing. Also is missing one tube ( maybe i pulled it to repair another radio, but i don't remember.

Anyone knows what model it is? tube lineup is typical for an AA5
anyone knows where i can ge a schematic?
also, the ballast tube will be a problem
also i will needsome grill cloth

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 Post subject: Re: g.e. mystery radio.
PostPosted: May Sat 11, 2019 2:05 am 
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Joined: Nov Tue 14, 2017 5:09 am
Posts: 3156
Location: Austin, Texas
Attachment:
JE-530.jpg
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http://www.nostalgiaair.org/pagesbymodel/138/M0008138.pdf

Alignment instructions and parts list here: https://www.radiomuseum.org/r/general_el_je530.html

What input voltage will you be using?

Jay


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 Post subject: Re: g.e. mystery radio.
PostPosted: May Sat 11, 2019 3:36 am 
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Joined: May Wed 31, 2006 6:41 am
Posts: 255
thanks,
i will be using 220V

looking at the specs mine is j-530


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 Post subject: Re: g.e. mystery radio.
PostPosted: Apr Thu 09, 2020 2:01 am 
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Joined: May Wed 31, 2006 6:41 am
Posts: 255
i am waiting some parts to start with this one.

the ballast will be complicated.
the speaker cone os broken also


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 Post subject: Re: g.e. mystery radio.
PostPosted: Apr Thu 09, 2020 4:36 am 
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Joined: Dec Sat 24, 2011 9:17 pm
Posts: 6906
Location: Vancouver Island, Canada
Looks like you need a ballast that will drop about 100 volts at 0.15 amps.

Here's an example:
https://vacuumtubesinc.com/index.php/115-98.html

Any 5" speaker can be installed. Ideally it would be 3.5 ohms impedance, but an 8 ohm speaker will work very well.

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


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 Post subject: Re: g.e. mystery radio.
PostPosted: Apr Sat 11, 2020 3:11 am 
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Joined: May Wed 31, 2006 6:41 am
Posts: 255
0,15 amps is only for the heaters, actually is 0,2 amps.

i was thinking about dropping voltage with capacitors. i will need 2 caps, one to drop 100v @ .15 amps 50hz and another to drop arond 69V @ 0,05amps
50Hz

i need 4,7uf and 2.2 uf. i am thinking using a class y safety capacitor.

Never tried this, but it should work


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