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[Yaesu] Pin Diode mod for FT1000D

To: <yaesu@contesting.com>
Subject: [Yaesu] Pin Diode mod for FT1000D
From: k0zz@worldnet.att.net (Robert Emerson)
Date: Mon, 25 Jan 1999 02:16:31 -0000
Hi Robin! Seems to me we have both been looking for the same thing for quite
some time on this reflector. Another area you might want to research was
posted on the TopBand reflector by W8JI. He found that adding three diodes
to the noise blanker circuit effectivley removed it when the the NB and NB-W
switches were in the off position therby reducing quite a bit of IMD. Email
me and I'll post the message here or to you directly.

Rob, K0ZZ


-----Original Message-----
From: Robin Thompson <robin@g3tkf.demon.co.uk>
To: yaesu@contesting.com <yaesu@contesting.com>
To: <yaesu@contesting.com>
Date: Sunday, January 24, 1999 17:00
Subject: [Yaesu] Pin Diode mod for FT1000D

>Hi chaps
>Some time ago there was discussion about modifying the front end PIN
>diodes to reduce the amount of 2nd order harmonic intermod on earlier
>versions of the FT1000 (NOT the MP!!)
>Has anyone got details of the best diodes to use for replacement ?
>I was very aware recently during an 80m contest with LOTS of really big
>signals how the few clear frequencies seemed full of bits and pieces of
>cw - but unreadable - I gather these were probably the products of
>various signals on the band mixing.
>Hopefully a change of PIN diodes may help ?
>Robin Thompson
>City of Bath
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