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Vintage Amateur and Military Radio Amateur/military receivers and transmitters, morse, and any other related vintage comms equipment. |
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18th Oct 2021, 7:38 pm | #1 |
Tetrode
Join Date: Sep 2020
Location: Kingston upon Hull, East Yorkshire, UK.
Posts: 57
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Yaesu FRG 7700 not tuning past 16.000
Hi guys,
just got one of these at a radio rally, cosmetically lovely condition, unfortunately it wont tune past 16.000 mhz, if I move the band selector further up, it displays 21.245, then at 21.000 mhz it displays 30.485 right up to the 29 Mhz setting. Down the scales it tunes in fine and good reception on 1-16 mhz. Any ideas guys? I know a guy who dabbles with old kit, he serviced my FRG-7 but he's not available for a few weeks. Hope you can help. Steve
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Tecsuns PL-310, PL-330, PL-600, PL-880, Yaesu FRG-7700, Kenwood R-1000 and a Yaesu FRG-7 |
19th Oct 2021, 11:57 pm | #2 |
Heptode
Join Date: Jan 2008
Location: Birchington Kent, UK.
Posts: 596
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Re: Yaesu FRG 7700 not tuning past 16.000
I'm sure we've had this topic before Steve.
Have a search of the other Frg7700 threads. Sounds like a VCO problem.
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Regards Pete |
20th Oct 2021, 2:38 am | #3 |
Hexode
Join Date: Dec 2013
Location: Torrington, Devon UK.
Posts: 446
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Re: Yaesu FRG 7700 not tuning past 16.000
Most likely this will be VCO voltages that are out of spec. The service manual for these is very good. Also I have done a few videos on YouTube of these. Very nice receiver once sorted
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20th Oct 2021, 10:45 am | #4 |
Tetrode
Join Date: Sep 2020
Location: Kingston upon Hull, East Yorkshire, UK.
Posts: 57
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Re: Yaesu FRG 7700 not tuning past 16.000
I've been after one for quite a while...
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Tecsuns PL-310, PL-330, PL-600, PL-880, Yaesu FRG-7700, Kenwood R-1000 and a Yaesu FRG-7 |
14th Nov 2021, 6:56 pm | #5 |
Tetrode
Join Date: Sep 2020
Location: Kingston upon Hull, East Yorkshire, UK.
Posts: 57
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Re: Yaesu FRG 7700 not tuning past 16.000
While waiting for my guy to have a look at my 7700, I turned it over to look through the bottom vents, I was a bit shocked to see four or five wires with plugs on flapping around disconnected! they were silver or white in colour, should I be worried?
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Tecsuns PL-310, PL-330, PL-600, PL-880, Yaesu FRG-7700, Kenwood R-1000 and a Yaesu FRG-7 |
14th Nov 2021, 7:13 pm | #6 |
Nonode
Join Date: Jun 2013
Location: Surbiton, SW London, UK.
Posts: 2,801
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Re: Yaesu FRG 7700 not tuning past 16.000
The FRG-7700 could be supplied with the memory unit or it could be retrofitted to the
rear of the set - may explain the cables; https://www.universal-radio.com/cata...vr/mu7700.html |
15th Nov 2021, 7:49 pm | #7 | |
Tetrode
Join Date: Sep 2020
Location: Kingston upon Hull, East Yorkshire, UK.
Posts: 57
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Re: Yaesu FRG 7700 not tuning past 16.000
Quote:
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Tecsuns PL-310, PL-330, PL-600, PL-880, Yaesu FRG-7700, Kenwood R-1000 and a Yaesu FRG-7 |
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28th Nov 2021, 7:54 pm | #8 |
Tetrode
Join Date: Sep 2020
Location: Kingston upon Hull, East Yorkshire, UK.
Posts: 57
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Re: Yaesu FRG 7700 not tuning past 16.000
Just got it back from being repaired, runs like a dream now, apparently it has the FM. module already installed but I couldnt tune to it before. How do I use the /fm mode on the 7700? instructions seem a little confusing.
TIA Steve
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Tecsuns PL-310, PL-330, PL-600, PL-880, Yaesu FRG-7700, Kenwood R-1000 and a Yaesu FRG-7 |
28th Nov 2021, 9:07 pm | #9 |
Nonode
Join Date: Jun 2013
Location: Surbiton, SW London, UK.
Posts: 2,801
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Re: Yaesu FRG 7700 not tuning past 16.000
Select FM, and turn the squelch knob anticlockwise and a loud hiss will be audible. Turn the squelch clockwise to the point where the noise (or the weaker of two signals) disappears. Set the main tuning to obtain the least noise on a signal concurrent with a
maximum S-meter reading. Apart from when you use the set with an external vhf convertor, the only FM signals you may hear will be on the CB bands (27-28 MHz). |
3rd Dec 2021, 8:50 pm | #10 | |
Tetrode
Join Date: Sep 2020
Location: Kingston upon Hull, East Yorkshire, UK.
Posts: 57
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Re: Yaesu FRG 7700 not tuning past 16.000
Quote:
Yeah, I picked up a couple of CB'rs I suppose its always handy to have a few more frequencies. BTW now the 7700 is stood flat on the desk, Im finding it a bit low for my eye level. I tried. couple of doorstops, but they are a bit slippery and slide around too much. Any cheap ideas on raising the angle a bit? Steve
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Tecsuns PL-310, PL-330, PL-600, PL-880, Yaesu FRG-7700, Kenwood R-1000 and a Yaesu FRG-7 |
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3rd Dec 2021, 9:30 pm | #11 |
Nonode
Join Date: Jun 2013
Location: Surbiton, SW London, UK.
Posts: 2,801
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Re: Yaesu FRG 7700 not tuning past 16.000
The sets originally came with two extra extended feet for the front. You could replace the front feet with two round rubber doorstops, or even
https://uk.farnell.com/penn-elcom/91...43?ost=2808943 |