[ICOM] IC-735 misbehaves above 21.9 Mhz

[Gary Fiber]

There are 4 screwdriver or tuning tool adjustable variable capacitors in the 735 VCO system. Each one controls a range of frequencies. They are set so a test point shows a DC voltage, possibly 3 volts on a certain frequency, that voltage will vary as the radio is tuned through the frequency range the particular VCO covers. If that voltage is not present the radio will not operate in a range of frequencies that VCO is designed to control. Hope this helps.

Gary P. Fiber K8IZ



> On Oct 29, 2015, at 2:54 PM, Nathan Moreschi via Icom <icom at mailman.qth.net> wrote:
> 
> Trimmer caps?
> 
> Sent from Yahoo Mail on Android
> 
> From:"keith.miller5 at comcast.net" <keith.miller5 at comcast.net>
> Date:Thu, Oct 29, 2015 at 5:11 PM
> Subject:[ICOM] IC-735 misbehaves above 21.9 Mhz
> 
> 
> Hi, 
>   
> I have an IC-735. 
> When I turn on the power to the rig, nothing is heard if the last frequency I was listening to was 22 Mhz or greater. 
> As soon as I tune down to 21.999 or below, normal signals are heard and then I can hear normally anywhere on the bands until I turn off the rig. 
> I can hear an audible relay click when tuning from 21.999 over to 22.000. 
>   
> Any suggestions? 
>   
> Keith 
> KB0EMP 
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