[Waverley ARS] FT857

[Derek Nelson]

Has anyone had this problem...my FT857D suffers on SSB, i'll need to 
have it repaired.

Will finally make it to a project day today!

Derek VK2JAF

henry mark swiss wrote:
> Yes that's correct, I have done a couple, one an FT897D, whilst at 
> Benelec. Take care with the test points.
> Henry VK2RE.
>
>
> From: "Raffy Shammay" <raffy at raffy.net>
> To: "Vk2bv" <members at cactii.net>
> Subject: [Waverley ARS] FT857
> Date: Fri, 26 May 2006 05:28:29 +1000
>
> Hi All,
> I think someone had this problem but I can t remember who . Here's a fix
> anyway from yahoo groups:-
> Message 8
>
> From: "Rob, WB1AEX" wb1aex at hotmail.com
>
> Date: Wed May 24, 2006 2:51pm(PDT)
>
> Subject: Re: FT857D on 6 meters
>
> Hi John,
>
> In the past, some 857/897 rigs, including some D models, have shipped 
> from
> the factory with the power amp and exciter transistors biased fairly 
> close
> to cut-off. The idling current problem is sometimes not readily 
> apparent on
> the HF bands, but it is usually very apparent (fuzzy, muffled, heavily
> distorted audio) on 6 meter sideband and I suspect this is what you 
> might be
> referring to. My own rig, an 897D, manufactured in June 2004, had a
> horrendous issue with 6 meter sideband until I adjusted it. The 
> problem was
> also apparent on HF if I attempted to use the speech processor, or if the
> SWR foldback engaged itself due to a poor match. Most hams reported 
> that it
> sounded like RF feedback on steroids.
>
> I have worked about a half dozen 857/897 rigs purchased in the last 6 
> months
> and they don't seem to be exhibiting this problem anymore. However, 
> even if
> your new rig does exhibit this problem, it is very easy to correct (takes
> about 20 minutes, including taking the covers of the radio off). The 
> service
> manual has the steps for checking and adjusting the exciter and PA 
> resting
> current, or if you wish, I have a link with pictures and an 
> explanation of
> the steps involved.
>
> When the rig is adjusted correctly the transmit audio is outstanding. 
> Also,
> once it is running right, adjusting the carrier insertion point gives 
> you a
> full range of adjustment from very clean and natural sounding audio to 
> very
> sharp and penetrating audio.
>
> 73,
>
> Rob WB1AEX
>
> http://members.cox.net/wb1aex/897idle.html
>
>
>
> > 73s John W5TD
>
>
>
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