[ICOM] 250 Hz mod for IC-765

[W7RY]

Yes, I have done the mod. It works great. And yes, the 500 Hz filter is
available too. Just push in or out the 250 Hz switch. The mod is a must
for RTTY.

73
Jim W7RY



-----Original Message-----
From: icom-bounces at mailman.qth.net [mailto:icom-bounces at mailman.qth.net]
On Behalf Of Rick Mintz
Sent: Monday, June 12, 2006 3:58 AM
To: icom at mailman.qth.net
Subject: [ICOM] 250 Hz mod for IC-765

Hi gang,



I am considering the following mod to my IC-765 to allow RTTY access to
the 250 Hz filter. 



Can anyone that has done this mod tell me if the standard 500 HZ RTTY
filter is still available after the mod is installed?



de Rick, W1TY





Using the 250 Hz second IF CW Filter in RTTY mode [From: Dave KD6TO]

 

This allows use of the 250 Hz second IF CW filter (FL-53A) in RTTY mode.
Install the optional 250Hz filter according to the instructions (if not
already

installed).

 

Remove the covers to gain access to the Main Unit PCB.

 

Take a 1SS133 diode or equivalent and solder the positive side to the
positive side of D42 (accessible at pin 15 of IC11) and the negative
side to the negative

side of D39.

 

Re-assemble and test.

 

The CW 250Hz pushbutton will now select the 250Hz filter in both CW and
RTTY modes.


----
Your Moderator: Dick Flanagan K7VC, icom-owner at mailman.qth.net
Icom Users Net: Sundays, 1700Z, 14.316 MHz
Icom FAQ: http://www.qsl.net/icom/