[600MRG] 630 meters receive antenna question

[William E. Isakson]

Yes Jim, I am using a 5 foot vertical up on a mast with a active preamp for
receive.  It works pretty good.   Comparison is hard for me to give because
when I was using a top loaded transmit antenna for receive that worked
considerably better,  but I do know that my ultra weak transmit signal was
received by a small mobile antenna used with a preamp from the San
Francisco Bay Area to Oklahoma.   Still I can say with certainty that my
small antenna with preamp is no match for Rudy's set 45 miles north of my
current location in Oregon.   Does generally work though.  The thing about
active antennae is that they are a voltage probe antenna, not a current
antenna, so the length is not a big factor.  As I understand it you might
get less noise with shorter ones, but not less signal.  That is, 4 feet
might be better than 8 feet.

Bill Isakson WD2XSH/44

--------


Bill Isakson     AC6QV
Roseburg, Oregon USA
bill.isakson at gmail.com



On Wed, May 18, 2016 at 2:56 PM, James Rodenkirch <Rodenkirch_LLC at msn.com>
wrote:

> Anyone employing a short vertical (approximately 8') receive antenna for
> 630 meters, with or without a preamp?
>
> As "introductory," aside notes:
>
> Applied two days ago for my 630 meter experimental license - I see I've
> been assigned a call--- WI2XJG -- and now waiting final approval.
>
> To get started, I will have a Ham Radio up converter shortly,after my
> friend builds it for me and ordered an MF Solutions down converter.
>
> The antenna is an existing 110'inverted U antenna....starting the planning
> for constructing the loading coil (familiar with loading coils as I had a
> 43' top loaded 160 meter vertical with a base loading coil, all home brew).
>
> Will operate CW and JT9 modes so interested in hearing if others out my
> way, s/w Utah, are operarting in both either of those modes......71.5/72 de
> Jim Rodenkirch K9JWV
>
>
>
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