I've seen this one before ... try a different antenna. This one
could have some hair-line cracks in some soldered joints which arc
when transmitter RF is applied.
Hope this helps,
Neil - WA6KLA
Q wrote:
>
> Been fighting with a severe interference problem for about a year,but
> lately it has gotten so bad my repeater is totally unusable!
> Heres the info; 147.870 input,147.270 output,GE MastrII base at 100
> watts,PLL exciter,UHS preamp disabled,Sinclair 202 duplexer,1/2 heliax
> to a Diamond F23A,no reflected power at all.Also tried a 1/4 wave ground
> plane,same results. All is fine until the repeater is keyed,I get
> screeching-buzzing noises from hell.If I kill the transmitter,it goes
> away. If I shift frequency of either the rx or tx,it goes away or at
> least gets reduced. There is NO desense when tested on a dummy load. If
> I tune around the 2meter band,I hear the same buzzing carriers at
> multiple frequencies. Cant hear them when the repeater is transmitting.
> Is this cruel intermod from some active device,ie-cable or sattelite
> dish,ect...? Where/how to track this down? Ready to pull the plug and
> sell it! Pulling what little hair is left,out! Any suggestions
> welcomed...73,Lee,N3APP
>
>
> Yahoo! Groups Links
>
>
>
>
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