[Amps] PIN diode mods

[Jan Erik Holm]

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