Garey Barrell <[EMAIL PROTECTED]> made an utterance to the drakelist gang
----------------------------------------------------------------------
That would be R1058 and R1060 on the PBT/Reference board. These
resistors are a part of an attenuator for the BFO injection signal to
the MC1496 mixer.
R1058 is changed from 220 ohms to 68 ohms, and R1060 is removed, was 68
ohms.
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 4-B, C-Line & TR-4/C Service Supplement CDs
<www.k4oah.com>
[EMAIL PROTECTED] wrote:
Hey Steve:
Although I will probably never find it in my storage room, I do have a
copy of a letter regarding the version 2 IF board.......I believe it
was from Bill Frost, but can't guarantee it..
The point is/was that 2 resistors are changed on another circuit board
when using the version 2 IF board.....and, no I don't remember which
circuit board.....
If anybody has this information, it may solve part of your gain problem.
73's & GL
Bill W6FF
Santa Barbara, Ca.
=================================================================
----- Original Message -----
*From:* [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>
*To:* [email protected] <mailto:[email protected]>
*Sent:* Monday, June 09, 2008 10:28 PM
*Subject:* Re: [drakelist] TR7 2nd IF Audio board: redux and question
on R1136
I have S/N 6951 and it has a version 1 IF board. I have tried 2
different version 2 boards ( which I know are in good working order)
and they work but I cannot get the s-meter to adjust: with the
version one board my radio reads S9 at 28 MHz but both version 2
boards read S8 or a little lower when reading the calibrator signal.
Do I have to adjust R1136 receiver sensitivity to get all boards to
react the same?
Steve KD2ED
----------------------------------------------------------------------
Submissions: [email protected]
Unsubscribe: [EMAIL PROTECTED] - unsubscribe drakelist in body
Hopelessly Lost: [EMAIL PROTECTED] - help in body of message
Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net
----------------------------------------------------------------------
