[Elecraft] K2 receiver going temporarily deaf

Wed Mar 31 22:22:01 2004

Thanks all who replied

Most everyone is pointing toward a short in the feedline and/or antenna.  I
feel 99.9% confident the jumpers, connectors, feedlines etc. are fine.
Nothing but well-made 'premium' (Pomona, Belden, Amphenol, Buryflex, etc.)
goods here... no radioshack ;)

However, I did notice when I put the W9INN dipole up a couple weeks ago the
SO-239 'nut' on the balun was a bit loose (thus the SO-239 itself could
rotate in the center insulator) as I tightened the feedline to it. I
stopped, tightened the nut back up while holding the SO-239 in place but
maybe that's all it took and it 'broke' anyway. I have noticed some
intermittent high (4-5:1) SWR swings on it this past week. I was just
thinking (hoping?) it might be static charge from the T-storms/windy weather
we've had in the area lately. The KAT2 seemed to match it OK and the
receiver stayed 'dead' when I switched to the Sigma GT5.

I'll just replace the dipole center balun. Hopefully that will eliminate
these unnerving dead receiver 'events'.

Thanks again,
Mike K5PU

----- Original Message ----- 
From: "Vic Rosenthal" <[email protected]>
To: "Mike McCoy" <[email protected]>
Cc: "Elecraft" <[email protected]>; "Gary Surrency"
<[email protected]>
Sent: Wednesday, March 31, 2004 8:46 PM
Subject: Re: [Elecraft] K2 receiver going temporarily deaf

> Mike McCoy wrote:
>
> > I have some sort of an 'event' going on here where twice now my K2 has
gone
> > temporarily stone deaf.  While it is 'dead' I discovered the K2 would
> > receive normally if I disconnected the PL-259 (coax ground) shield. As
long
> > as ONLY the center conductor is connected the K2 would receive fine.
This
> > with the antenna connected to either ANT1 or ANT2.
>
> Check that your feedline is not shorted at the antenna.  That would
> produce the symptom you describe.
>
> -- 
> 73,
> Vic, K2VCO
> Fresno CA
> http://www.qsl.net/k2vco
>
>
>