Graham

I value your input on my VFO hash issue.  Of all the responses yours seems to 
best match my situation.

I bought my radio factory built and have never been into it.  When I retired 
last year, I meant it.  I bought this K3 in December
hoping not to ever open any more radios.  I prefer the operating and doing the 
antenna builting part of the hobby.  The last two years of work were with the 
Motorola VHF/UHF CDMs and their Canopy microwave radios and that was to be the 
end of tweaking the inner parts of the circuits.  Programing radios is fine but 
dealing with surface mount boards and their interconnects requires more lab 
than I have here at home. 

I guess I will wait for solid factory direction before I venture inside for the 
first time.  You know, having not built my K3 leaves me at quite a disadvantage 
if I should start now by dealing with the inside workings of the radio.

I've seen this kind of noise on early radios.  It makes sense that a optical 
encoder digital device on the VFO knob would generate this kind of pulse noise. 
 I gather that the RIT knob is also an encoder too.  But why is it only showing 
up on the low end of 10 meters?  Maybe some ferrite chokes on the ribbon 
cable/wires would suppress the emission?

Thanks again....

73,

John, W1QS


On Jun 27, 2009, g3...@lineone.net wrote: 
This noise was previously reported under the title "K3 Tuning encoder pulses
and birdie problem"
In my case it is only noticeable at the low end of 28MHz when there is a low
noise level from the antenna or with a dummy load attached.
Wayne suggested using the noise blanker on a low setting like t1-5, also
tightening screws and tmp cables may help.  In my case it seemed to get
better when I installed the KRX3, but maybe cos I tightened up the screws
and cables.
HTH
Graham

----- Original Message -----
From: "John Lawrence" <j...@hughes.net>
.
> What I've discovered and reported to factory tech support is a very
noticable hash noise while in the receive mode with any bandwidth centered
around 28.000 MHz to 28.050 MHz.

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