[Yaesu] FT-857 (not 857D or ND) 6m self-oscillation

[John Geiger]

And remember to send Yaesu a thank you note for making you pay to fix
something that was their design flaw.

73s John NE0P

----- Original Message -----
From: "mikea" <mikea at mikea.ath.cx>
To: <yaesu at mikea.ath.cx>
Sent: Sunday, November 06, 2005 8:19 PM
Subject: [Yaesu] FT-857 (not 857D or ND) 6m self-oscillation


> I just bought a used FT-857. On all bands except 6m, it's a great
> rig, if a little power-thirsty. Folks tell me how good I sound on HF,
> 2m, and 70 cm, and I get great signal reports for CW in those bands,
> too.
>
> There's a little problem, though: on 6m SSB it wants to go into a
> nasty off-band self-oscillation: I see power out hit the peg, the
> display turns brightest red when set to meter SWR or power out, and
> both forward and reflected power on my tuner's meters go to the peg.
> This is at any power level whatsoever, with the antenna tuner set
> to present SWR below 1.1. Similar things happen when I'm doing CW;
> there's an initial flash of high power out or high SWR, after which
> the output settles down for the rest of the dit or dah.
>
> The antenna and tuner are good: a borrowed Icom 551D works just fine
> with the same tuner settings, and doesn't present the anomalies in
> power out and SWR.
>
> Google searches lead me to believe that this is a known -- and solved
> -- problem, but don't indicate the solution. Does it involve sending
> the rig and some money to Yaesu, or is it something I can fix here at
> the QTH with hacksaw and a ball-peen hammer?
>
> Thanks in advance for the help.
>
> --
> Mike Andrews, W5EGO
> mikea at mikea.ath.cx
> Tired old sysadmin
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