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 Post subject: GE 10 Band Portable Radio 7-2971 schematic
PostPosted: Mar Thu 30, 2017 7:25 pm 
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Joined: Mar Fri 06, 2015 6:47 am
Posts: 77
Location: Cleveland, Ohio
I have recently acquired a GE 10 Band Portable Radio 7-2971 from a garage sale. This is transistor radio receiver from the early 1970s. A previous owner tried to "fix" it. It is hard to tell where some of the original wires connect. Am looking for schematic so that I can diagnose.

Thanks,

John


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 Post subject: Re: GE 10 Band Portable Radio 7-2971 schematic
PostPosted: Mar Fri 31, 2017 1:38 am 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 19702
Location: Utica, NY 13502 (USA)
The GE 7-2971 looks like this:

Image

Dave


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 Post subject: Re: GE 10 Band Portable Radio 7-2971 schematic
PostPosted: Mar Fri 31, 2017 1:45 am 
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Yes that is the model, do you have a schematic or pictures of the internal wiring? Mine does not power up and there are several wires that terminate and have been insulated with masking tape. Looks like a previous owner attempted repair.


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 Post subject: Re: GE 10 Band Portable Radio 7-2971 schematic
PostPosted: Mar Fri 31, 2017 1:50 am 
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Location: Cleveland, Ohio
Radiomuseum.org does not have a schematic, already checked.


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 Post subject: Re: GE 10 Band Portable Radio 7-2971 schematic
PostPosted: Mar Fri 31, 2017 11:40 am 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 19702
Location: Utica, NY 13502 (USA)
Jbdkz wrote:
Yes that is the model, do you have a schematic or pictures of the internal wiring?
I posted the picture because some members could have the information you are seeking but might not be familiar with or remember its model number.

Dave


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 Post subject: Re: GE 10 Band Portable Radio 7-2971 schematic
PostPosted: Apr Wed 05, 2017 4:22 am 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 5937
Location: Black Hills, SD 57745
Sometimes you can make a guess. Wires near battery or AC supply or can be traced to the switch might be power. Those from the driver section could be volume or tone. Near tuner or AM rod, antenna. Speaker/output/earphone similarly.

But if all are removed from the circuit board, that would take some sleuthing for sure! Looking for solder-work to traces, now-empty holes on the board, etc. But still it could be weeded down. The final output transformer winding should be evident, trace that to some connection that is no longer there and try the speaker there. Electrolytic capacitors, diodes and transistors will help denote polarity and circuit function in those locations.

Got a pic of the innards, so we can guess along with you? :)
-Ed


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 Post subject: Re: GE 10 Band Portable Radio 7-2971 schematic
PostPosted: Feb Wed 21, 2018 12:53 am 
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Joined: Jul Sun 13, 2008 4:02 pm
Posts: 96
Location: Scranton, PA 18505
Does anyone have a schematic or alignment procedure for this radio. Picked it up at a yard sale last summer but someone tried to “tune it up”. Looks like they twisted anything they could.


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 Post subject: Re: GE 10 Band Portable Radio 7-2971 schematic
PostPosted: Apr Sat 07, 2018 11:30 pm 
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Joined: Jul Sun 13, 2008 4:02 pm
Posts: 96
Location: Scranton, PA 18505
Bump


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 Post subject: Re: GE 10 Band Portable Radio 7-2971 schematic
PostPosted: Apr Tue 10, 2018 3:09 am 
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Joined: Apr Sat 16, 2011 2:25 am
Posts: 388
Location: Victor, MT USA
I had one of those for several years, got it on ebay for a real good price. It performed pretty darn good. I hope you get service info for it. I just recently traded it off a couple of weeks ago for an old tube radio. Good luck, Alan

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Don't worry about old age; it doesn't last that long.


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 Post subject: Re: GE 10 Band Portable Radio 7-2971 schematic
PostPosted: Apr Tue 10, 2018 3:15 am 
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Joined: Jul Sun 13, 2008 4:02 pm
Posts: 96
Location: Scranton, PA 18505
Alan, thanks for the kind words. I’m hoping someone out there has some info. I may just hook up a rf generator and wing it. Can’t lose anything, it doesn’t work now.


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 Post subject: Re: GE 10 Band Portable Radio 7-2971 schematic
PostPosted: Apr Thu 12, 2018 10:43 pm 
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Joined: Jan Mon 22, 2018 5:59 pm
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Try and find something close to it. Maybe the same manufacturer but later model
With loose wires it helps to test ohms to battery plus. Normally lower resistances indicate the polarity. I once had a disconnected wire at 200 volts so when hedging a good bet, test the assumed lug for earth. This at least avoids a dead short. Also if a wire gives 2k try and trace to any resistor of said value and determine possible function. Main and crucial point avoid over voltage to vulnerable circuit points. I once made the fatal mistake of sending 1.5 volts to 2 volt tube filaments and later discovered really accurate voltage was a must. The filaments wound up dead.


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 Post subject: Re: GE 10 Band Portable Radio 7-2971 schematic
PostPosted: Apr Thu 12, 2018 10:46 pm 
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Joined: Jan Mon 22, 2018 5:59 pm
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PS it looks very similar to a Benson cosmetically.


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 Post subject: Re: GE 10 Band Portable Radio 7-2971 schematic
PostPosted: Apr Sat 14, 2018 8:48 am 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 581
Location: Shiner ,Texas
We ll...this one I had in the early seventies.Yes..played super...shortwave was excellent..no fine tuning but selectivity was fine.I lost my Toshiba shortwave on the trip back to the States...Dad picked this model up for me to replace the one the movers took in Germany.It was a let down from the Toshiba in that instead of chromed metal and hard shiny plastic this Hong Kong made GE looked dull and dowdy.I see these on Ebay all the time,working from $30 to $50 bucks all the time.There are 4-5 on Ebay right now.


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