[ICOM] Flickering display - 756 Pro

Larry Benko w0qe at bnk.com
Sun Oct 17 13:27:57 EDT 2004


Joe,
 
No reason to believe RF would be getting in on the keying line as 
opposed to any other leads connected to the transceiver.  I would 
disconnect EVERY line (including the mic) to the 756.  Then I would 
short the amp keying line putting the amp in the ready to TX mode, put 
the 756 in the FM mode and press the transmit button on the fromt panel 
and rig will transmit.  If you still have flicker then RF is not getting 
in on leads.  If no flicker then add lines one at a time and it will be 
obvious which one(s) are the problem.

73,
Larry, W0QE



Joe - WDØM wrote:

> A very reasonable thought.  But why would it suddenly start without 
> any changes in configuration after all this time?  I have toroids on 
> the keying line....still happens.  RF feedback was one of my 
> suspicions....and it may still be finding a way into it that I have 
> yet to find.
>
> 73,
> Joe
> WDØM
>
> At 10:48 AM 10/17/2004, N0KHQ at aol.com wrote:
>
>> RF is getting into the Pro.
>>
>> Probably through the keying line. RS sells snap on toroids that you 
>> can  use,
>> wrap as many turns of the keying line around the toriod as you can.
>>
>> A ground rod is good for DC or AC grounding, but helps very little 
>> for RF
>> grounding.
>>
>>
>> 73
>> John / N0KHQ / St. Louis
>>
>> Always on  18.130
>>
>> Antennas:
>>
>> You can build 'em better than you can buy  'em
>> Please visit the sites below:
>> _http://www.hamuniverse.com/antennas.html_ (http://www.hamuniverse.com/)
>> _http://www.cebik.com/n0khq.html_ (http://cebik.com/nokhq/html)
>>
>>
>>
>>
>>
>> ----
>> 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/
>
>
>
> ----
> 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/
>
>



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