[Elecraft] 4 MHz Oscillator Mod for Easier Adjustment

[Ken Wagner]

Hi Roy:

I was just going through the same exercise and found the same thing as
you... but on 3rd or 4th look, I found in Cat #611, page 263, under "Vishay"
ceramic caps, 561C Series a listing for 1kv, NP0/N750 Precision Disc Caps...

So, I would assume that they would respond to an order for the N750's... but
I'd do it on the phone to make sure...

Oh... this has nothing to do with the other "drift mods." This is just for
the 4MHz oscillator... at least that is my understanding.

73, Ken K3IU
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
----- Original Message -----
From: <Unifiedtx@aol.com>
To: <elecraft@mailman.qth.net>
Sent: Monday, August 25, 2003 22:41
Subject: [Elecraft] 4 MHz Oscillator Mod for Easier Adjustment


| John Grebenkemper, KI6WX, made a mod to the 4 MHz oscillator to increase
the
| bandspread of C22.  His change requires two 10pF N750 caps. One replaces
C21
| and the other is placed across X2.  I have looked in the Mouser catalog
and
| find COG (NPO), X7R, Z5U and Y5P temperature coefficients.  There is no
reference
| to N750 caps.  Which of the above is equivalent to N750?  Also I would
like
| to know if I need a N750 type since I have made all the drift mods.  Roy
Morris
|  W4WFB
|