Yaesu did a PIN diode mod on FT-1000D starting with
lot 28, they replaced 1SS83RE with 1SV257TB, it´s
all in tecnical bulletin TB93201.
Yours could be lot 28 or after.
73 Jim SM2EKM
---------------
Tom W8JI wrote:
>>Maybe Ulrich with his well respected HF credentials and
>>his vast
>>experience with collocated HF transmitters and receivers
>>in military
>>markets became the main focus for all his measured
>>improvements.
>>The data measured with very wide spaced high 3rd order
>>intercept
>>points may be valid using better PIN diodes in such a
>>severe RF
>>environments. Only he could answer these questions.
>
>
>
> My FT10000's sure didn't change a bit in any measured
> parameter, and I used the slowest diodes I had. Neither did
> my IC 751A.
>
> I did two tone IMD and blocking DR tests both in an out of
> the roofing filter.
>
> 73 Tom
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