Several folks have mentioned they did not see this list of MP technical
bulletins and asked for me to re-post it. So here it is again ...
73 Bill AA4NU aa4nu@raider.raider.net
> I called Yaesu Tuesday regarding the "Heil prob" ... which is NOT that
> big a deal here to me, yet ... and inquired about "other MP info" ...
>
> 1. Yaseu tech didn't know abt the CPU ROM being diff ! My older MP
> has a CPU of 1.25, the newer one is 1.26 ... the readout on HIGH
> with the newer MP seems like LOW on the older one ... wonder if
> the CPU change has anything to do with this ...
>
> 2. CPU is NOT socketed, so must be sent back to upgrade.
>
> 3. TB9547 (12-26-95) deals with "Receives Image Signal" on "Lot 3"
> serial number ranges ... I called in November and was told they
> had a "fix" but did not have it typed up, it is now ... they have
> added 3 parts to form a 'filter' basically and a ground spring.
> (I had noticed that I heard a local 1450Khz AM station on 3790.0
> when using my 160m vertical to listen on 80m ! Using a 402-X ICE
> filter cleared it ALL up. HOWEVER, I borrowed a TS-850s and it had
> the same or WORSE (on 160m) problem than the MP w/o the ICE filter
> in-line ! So again, this should not be a problem here when I get
> the 80m 4x array back on line.)
>
> 4. TB9617 (05-22-96) deals with "Low gain with plug in heil headphone",
> no serial range given ... again not an issue at this time with the
> Heil PROSETs I have here on the MPs ...
>
> 5. TB9607 (03-21-1996) deals with "Critical power adjustment with
> processor switch turned on" on "Complaint Unit" for Serial No. Range.
> Now this one may interest you using ETO power amps and having probs !
> Looks like you add a jumper and cut a trace ...
>
> 6. Yaesu will do these mods N/C as warrenty, I/you have to pay the shipping
> out there, they will pay for the shipping back. HOWEVER, I asked about
> "turn around time' and it's running 4 weeks ! UGH.
>
> Anyone aware of other Technical Bulletins for the "MP" ????
>
> My station is still 90-% QRT and in the rebuild mode from the recent
> damage. Kirk WR3O has used the older MP at his station for the CQ 160,
> NAQP's, Sprints, ARRL DX, etc ... ie LOTS of CW QSOs ...
> and no problems to speak of. The ONLY problem this one had was low output
> on 80m, which I fixed in about 30 seconds once I had the service book.
> The factory TX IF gain was set lower on 80m than any other band. I set it
> to the same as the other bands, and no more probs.
>
> I did check the newer MP when I rcvd it, and everything was set FB ....
>
> Hope this information proves useful ...
>
> 73 Bill AA4NU aa4nu@raider.raider.net
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