[Elecraft] Temp Stability Mod

[Tom Hammond NØSS]

Jim, et al:

You wrote:
>I reviewed this mod as posted on N0SS's site and found a difference between
>that posting and the printed material received from Elecraft with the mod
>kit. Figure 1 on Tom's posting shows R19 added across pins 7 and 8 of RP2.
>The diagram from Elecraft is cropped so that RP2 is not shown, and makes no
>mention of R19.
>
>Should R19 be added, and if so, what is it's purpose?

YES... definitely!

The reason you found the disparity was MY FAULT, NOT that of Elecraft. I 
put the docs together, including the illustrations, and in our (mine & 
Elecraft's, mostly MINE) haste to get the docs out the door to waiting 
users, I failed to include R19 in my initial drawing, and it slipped past 
all of our proofings  unnoticed.

If you will check back in the archives, you will find that, about two days 
after the upgrade packets had been MAILED, I was informed of the error and 
at that time, I redrew the illustations (Fig. 1) and added R19. I then 
posted the revides docs on my private web site at

   qsl.net/n0ss

along with a series of notes to those readers of the reflector. I guess you 
must have missed the postings. You have my sincere apologies.

The updated DOCs are still available on my site, and I think they may also 
now be available on the Elecraft site as well.

Initially, R19 was to be 220 Ohms, and that value resistor was, if I 
recall, included in the upgarde packet. However, subsequent to that mailing 
of the parts, Wayne posted a note to all that R19 should be changed from 
220 Ohms to a value between 1.8k and 3.3k, with 2.7k being the best chioce, 
if that value is available.

Sorry for the confusion.

73,

Tom Hammond   N0SS