Then FT-1000D is a low end radio!
2nd order IMD improves over 20 dB when doing
PIN diode mod.
By the same time IMDDR3 2 kHz spaceing improves
approx 15 dB.
Voodoo....yeah right!
73 SM2EKM
---------------------------
Craig wrote:
> Most of the early PIN diode mods came from the information and articles
> by Ulrich Rohde N1UL.
>
> The PIN diode mods were mostly for 2nd order IMD problems. There were
> claims for some minor improvements in blocking and 3rd order dynamic
> range. However i seem recall most of the mods applied to low end radios
> like the TS450 and TS50 which suffered badly from 2nd order IMD in
> places like Europe. I also seem to recall that Signal One started
> promoting the supposed advantages of the HP PIN diodes in the Mil
> Packaged IC-781.
>
> 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.
>
>
> Craig
> VK3HE
>
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