Jul - The R-390A Frequently Asked Questions Page
Jul - The R-390A Frequently Asked Questions Page
Jul - The R-390A Frequently Asked Questions Page
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From cbscott@ingr.com Tue <strong>Jul</strong> 2 15:08:36 2002<br />
Subject: [R-390] Replacement Carrier Level Pot.<br />
As I recall, it was pretty much plug-n-play. <strong>The</strong> only hitch is fitting the pot in place. It is "deeper" than<br />
the original one. Again, if memory serves, I took both pots out of the bracket, removed the screw under<br />
the other pot (enabling me to pull the bracket up just a tiny bit), put the Claristat in, replaced the screw,<br />
and then the other pot. Wiring was straight forward.<br />
BTW, you're going to like it when you get it in place. You can "see" the windings as you adjust it, but it<br />
stays PUT once you get it where you want it! Barry(III) - N4BUQ<br />
From cbscott@ingr.com Tue <strong>Jul</strong> 2 15:11:48 2002<br />
Subject: [R-390] R<strong>390A</strong> cabinet<br />
I measured mine a couple of weeks ago and I couldn't recall if it was 14.5 or 15.5 deep. If the cabinet is<br />
only 14.375, it doesn't appear to be workable. Don't know why the ad copy includes the R<strong>390A</strong>.<br />
Barry(III) - N4BUQ<br />
From cbscott@ingr.com Tue <strong>Jul</strong> 2 15:23:11 2002<br />
Subject: [R-390] Re: R-390 digest, Vol 1 #271 - 15 msgs<br />
Drew, We have kidnapped Barry(III) and are holding him hostage. We are demanding our toilet back<br />
as ransom! <strong>The</strong> Mice<br />
From courir26@yahoo.com Tue <strong>Jul</strong> 2 16:15:51 2002<br />
Subject: [R-390] Replacement Carrier Level Pot.<br />
Gentlemen?<br />
On most radios, the adjustment wants about 7-8 ohms for zero set. I usually fit a 10 ohm resistor<br />
in parallel with the pot to pass some of the current through a fixed part, making the pot less<br />
critical. 73 Tom<br />
From pwokoun@hotmail.com Tue <strong>Jul</strong> 2 17:25:24 2002<br />
Subject: [R-390] Replacement Carrier Level Pot.<br />
Folks: A bunch years back I squirreled away a handful of 10 ohm ww pots just for this use. I've used<br />
a few and have a very limited quantity left (6) but I've decided to dump em and let them get used. <strong>The</strong>y<br />
work perfectly as zeroing pots in the R<strong>390A</strong>. Once zeroed, my carrier meter stays zeroed. <strong>The</strong>se are<br />
NOS Clarostat type CM27335 (somebody's part number 140-6109). 1-1/8 inch diameter x 9/16 inch<br />
high, screwdriver adjust shaft 5/16 inch beyond the std bushing. <strong>The</strong> wiper on these is soldered to the<br />
case by the mfg which doesn't matter since one end of the original 100 ohm pot is grounded. This<br />
ground looks like it can be lifted if it bothers you. But it's worked fine on 3 <strong>390A</strong>s I put them into.<br />
Will sell to members here for $10 each (includes shipping in US). pete KH6GRT<br />
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