[ICOM] Problems with 765

Paul Ferguson Paul at PaulFerguson.us
Sun May 25 21:50:08 EDT 2008


I have two problems with my ICOM 765:

1. Using CW I find my transmit frequency is about 0.5 Khz lower than my receive 
frequency. Of course this is with RIT and delta-TX off. I can set delta-TX to 
+0.5 and then my transmit signal matches my receive frequency. This is 
confirmed by on the air tests with other stations. I have the pitch control set 
at 12 o'clock. In SSB mode, my transmit frequency matches my receive frequency 
without any delta-TX set.

2. The Meter function does not work properly in Power Output or SWR mode. The 
Power output always reads zero even though external meters confirm normal power 
out. When using a dummy load, the Meter SWR indication is 1:1 (almost no meter 
movement). When transmitting into an antenna with an SWR measured by external 
meters of about 1.2:1, the IC-765 SWR Meter shows increasing values depending 
on RF Power adjustment. With about 10 watts output, IC-765 Meter says SWR is 
1.5:1. The false SWR indication increases to full scale on the meter as RF 
Power is increased to 100 watts.

Before I open up the unit and dig thru the service manual, does anyone have 
experience with these problems or can offer some insight into possible causes?

73,
Paul
K5ESW 


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