[Boatanchors] Slightly, OT: MF-HF Coax cable loss with high SWR (long post)

[Phil KO6BB]

Thanks Rob,
I do have a MFJ-1040C preamp that gets occasional use, mostly with the 
Zenith Transoceanic as it's performance, both in sensitivity and image 
rejection, falls off on the higher bands.   I rarely use it on the 
Grundig as it's performance is better.  Occasionally if a station is 
weak on the 15 & 17 MHz bands, and the noise floor low enough (rare 
here) I'll use it on the Grundig.

The new antenna I've ordered isn't a loop, it's a transformer coupled 
end fed 45' wire.  I have enough room and will probably add about 15 
foot to it's length which is supposed to help it some on MW where it's 
performance rolls off.

If the new antenna doesn't work out well (which I doubt from what 
previous tests have shown),  I may try one of the MFJ Phasing units.  I 
played with one once when a friend wanted me to modify it for LF work (a 
well publicized mod).  My experience with it in the LF range wasn't all 
that positive, at least not here.  It might work out better here in the 
shortwave range.

73 de Phil,  KO6BB
http://ko6bb1.multiply.com/ (OTR Blog)
http://www.qsl.net/ko6bb/  (Web Page)


On 9/22/2011 8:38 PM, Rob Atkinson wrote:
> use a preamp in the feedline from the rx loop.  ICE used to make a
> good one but I don't know if they have it now that the founder is a
> SK.  DX engineering has a good one but it is much more expensive.  you
> can probably HB one also.   another option is to get the MFJ phase
> shifting nulling box and use the rx loop and dipole together to
> receive and null a source of noise.  I think MFJ calls it the Signal
> Enhancer or something like that.
>
> 73
>
> rob
> k5uj
>