[ICOM] Flickering display - 756 Pro

[Larry Winslow]

Back in the 60s, I had a problem with flickering almost as you described 
(couldn't see it in the house lights but neighbor was screaming about the 
little line a quarter of inch from the bottom of her TV screen). My problem 
was a floating ground at the transformer that fed my home. Bottom line is 
put a meter across your power line and see if it bounces around. My problem 
had nothing to do with RF, just a faulty pole pig.

73 - Larry WØNFU
larry_w at comcast.net


At 11:11 AM 10/17/2004, you wrote:

>Just a thought -- I never had any flickering on my 756pro displays until I
>backed off the display intensity a bit.  Both of my PROs flicker a bit
>during keying (with or without amp) when the display intensity is only 5 or
>so.
>
>73,
>Mike WA0SXV
>
>
>-----Original Message-----
>From: icom-bounces at mailman.qth.net [mailto:icom-bounces at mailman.qth.net] On
>Behalf Of Joe - WDØM
>Sent: Sunday, October 17, 2004 10:39
>To: icom at mailman.qth.net
>Subject: [ICOM] Flickering display - 756 Pro
>
>Your thoughts??
>
>After having no problems at all for years, this morning when I fired up the
>756 Pro, Alpha 87a and called a DX station on CW, I noticed that the
>display on the 756 Pro began flickering in sync with the CW keying.  At the
>time, I was running about a KW on the Alpha 87a.  When I backed off on the
>power a bit, the flickering stopped.  I've never seen this problem before,
>and I've run the same combination for years.  The same thing happens,
>regardless of the band while using my SteppIR antenna, or when running 30
>meters or lower on inverted vees/slopers/dipoles.
>
>All equipment is grounded/bonded/single point ground.  I don't have a
>keying relay between the Pro and the Alpha 87a because the 87a easily meets
>the requirements on the relay in the Pro.  Nothing has changed in the
>configuration that I can attribute to this issue.  All I can think of is
>that maybe I SHOULD have a keying relay.....
>
>Anyone seen this happen before??
>
>73,
>Joe
>WDØM
>
>
>
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