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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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13th Sep 2021, 1:55 pm | #1 |
Dekatron
Join Date: Jul 2008
Location: Charmouth, Dorset, UK.
Posts: 3,601
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FT2800 low receive gain
Didn't realise this when I bought it as it is connected to an old BNOS linear which has a very good pre amp but switch the preamp off and all the weak stations disappear.
I haven't looked inside it yet as its very modern for me - no valves for a start. is it likely to be just an alignment problem or are they susceptible to faults? Thanks Peter |
13th Sep 2021, 2:20 pm | #2 |
Nonode
Join Date: Jun 2013
Location: Surbiton, SW London, UK.
Posts: 2,801
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Re: FT2800 low receive gain
This seems to be a problem with a range of modern Yaesu/Standard Vertex radios, the
ceramic IF filters develop dc leakage leading to deafness. Transmit is unaffected. My FT-1802 has the same problem. As the parts are surface mounted you may prefer the services of a pro repairer, I think a forum member is. A recent post mentioned it. |
13th Sep 2021, 2:30 pm | #3 |
Heptode
Join Date: May 2015
Location: Chatham, Kent, UK.
Posts: 964
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Re: FT2800 low receive gain
Hi the filters are prone to faults see https://vintage-radio.net/forum/show...ight=yaesu+vx7
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18th Sep 2021, 11:07 pm | #4 |
Hexode
Join Date: Oct 2013
Location: Peterborough, Cambridgeshire, UK.
Posts: 336
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Re: FT2800 low receive gain
i can confirm that the filters are usually the fault, they are cheap enough to purchase, the postage is more costly than the 2 x filters.
Yaesu techs recommend that you remove the black plastic cap and shake out the filter separators then unsolder the legs (5) 1 at a time, very easy to do, i have done several now, HOWEVER i did get caught out with 1 radio, it turned out not to be the filters but those miniscule stick on 3 legged fuses, the front end transistors. well worth doing the repair, Snowy |