[1000mp] Inrad CW Mod Install

[Ian White, G3SEK]

Art Searle W2NRA wrote:
>You could ask at http://www.qth.com/inrad/
>
>According to their website they do shop foreign orders.  I'd guess it 
>would cost you $14 or 7.82 GBP
>
>And the mod costs $15 or 8.38 GBP
>
No problems dealing with Inrad direct from over here, and the kits may 
also be in stock at GW3YDX.

>BTW I'm no expert on these 2 mods.  I've read on this list that the 
>W8JI mod is the same as the InRad mod plus additional components and 
>thus better.
>
The big difference is that the W8JI mod has *adjustable* components, so 
you can get it right for your individual transceiver. The Inrad mod is a 
good attempt at a "one size fits all" solution; but as Earl has 
testified, this is not quite so successful in reducing the clicks.

In addition to Yaesu's basic design problem that affects all models of 
FT-1000, there do seem to be genuine variations in click levels between 
individual transceivers. In other words, the click levels seem to depend 
in some subtle way on small variations in component tolerances (possibly 
the gate threshold levels in the IF MOSFETs?).  Whatever... but for the 
very best results, it does seem to be necessary to tweak each 
transceiver individually.

Another important point is that there are actually *two* click problems. 
There's a problem on key-down, and a *separate* problem on key-up. 
You'll never notice this if you blast away with a bug-key when trying to 
adjust the W8JI pots... so do it slowly with a hand-key, and tweak the 
two pots for the best balance between key-down clicks and key-up clicks.


-- 
73 from Ian G3SEK