[Fox_Tango] Re: FT-902DM comes to life on 10M -Kudos to AF2C, and others

[David L. Thompson]

I remember a guy (advertised in 73) who sold the 901 and later the 902DM and
I was told by friends most went to Spanish CBers.
Outside of the FT101ZD the 901/902 series was probably the most widespread
CB /HF Slider rig sold.  Glad you were able to fix it.
I have a pair of later FT980's and I had some problems with the oscilators
and BFO-VCV circuits.  Often the Yaesu Technical Supplement (what they call
the technical manual) does not cover anytyhing except normal alignment.
73 Dave K4JRB

> Thanks to all who offered suggestions.  AF2C hit the nail on the head when
he
> suggested  tweaking the two VCO slugs 10a/b and 10c/d.
>
> So I adjusted  VCO slug 10a/b about one turn clockwise ---- and bands 10a
and
>  10b miraculously came to life. Emboldened, I then  tweaked  VCO slug
10c/d
> about one turn clockwise ---  and bands 10c, and 10d came back to life!
>
> Be sure to  check both bands associated with each VCO slug before moving
on.
> Use a nonmetallic tool.  Note that the XCO board is located on the
underside
> of the chassis, but the VCO board is located on the top right hand side of
> the chassis and is accessible thru  holes in the side of the copper cover
> plate.
>
> In summary,  all the CB converter did was this:
>
> 1. replace 10m xtals 10a, 10b, 10c, and 10d with xtals 2 mhz lower in
freq.
> 2. attempt to tweak the 4 separate XCO slugs to get the rig to oscillate
on
> the cb frequencies.  This probably didnt work so he moved on to:
> 3. The VCO, where he tweaked the TWO slugs,  10a/b, and 10c/d. This brough
> the radio to life on 26-26.5; 26.5-27, 27.0-27.5, and 27.5-28 mhz.
>
> Nothing else was changed.
>
> Ive just heard from a Dutch ham who  reports a similar problem withhis
902DM.
>    There are probably plenty of  other similarly modified  rigs  available
at
> hamfests.  This same procedure  works on FT-902DMs, FT-901DMs, and
probably
> FT-101ZDs, and most other rigs that have been illegally modified for cb
use.
>
> Bob  W3HKK
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