Topband: VE3DO loop

[Michael Walker]

My GoTo RX antenna system is what Tim mentions above (pre-amp and matching
unit) plus the AVA-2.  I think that is now replaced by the DXE-AVA-3.

It really does a number on QRN and give you a bit more SNR.  I have used 2
of them at the same site on a FLEX-6600 in Diversity and it is fun to hear
the signals walk around in your head from ear to ear especially if you can
get some distance between them.  Or, I use the main 160M TX antenna on one
receiver and the AVA-2 on the other.  You'd be surprised how it varies from
RX to RX over the space of a few seconds.

At the Urban site (north Toronto) I have one out in the woods behind the
house and it just makes Urban HF operation a bit more doable.  I don't do
HF from the Urban site much, but I know others that do and it makes the
difference between hearing and not hearing.

Mike va3mw

On Thu, Oct 3, 2024 at 11:18 PM Tim Duffy <k3lr at k3lr.com> wrote:

> Hello Mike;
>
> I use this preamp in the shack - at the end of the 50 ohm Heliax that
> feeds my RX antennas (very low loss):
> https://www.dxengineering.com/parts/dxe-z10046b-pm
>
> I also match my 75 ohm RX antennas to 50 ohms using this:
> https://www.dxengineering.com/parts/dxe-rx75-50-xfmr
>
> The TS-590SG is an excellent radio
>
> 73
> Tim K3LR
>
> -----Original Message-----
> From: Mike Fischer [mailto:mikebfischer at comcast.net]
> Sent: Thursday, October 3, 2024 10:54 PM
> To: Tim Duffy
> Subject: Re: Topband: VE3DO loop
>
> Tim, may I trouble you with one more question?
>
> Could you recommend a low noise preamp that you would use with the VE3DO
> (if you would use one of course).
>
> My rig is a TS-590SG and has a dedicated rx ant port as you probably know…
>
> Thanks
>
> Mike
> Sent from my iPhone
>
> > On Oct 1, 2024, at 10:58, Tim Duffy <k3lr at k3lr.com> wrote:
> >
> > Hello Mike;
> >
> > There are a few different "receiver guards" out there. If your receiver
> guard is a RG5000HD from DX Engineering, you should be OK. As a test, I
> have put as much as 25 watts into the RG5000HD and it did not damage the RX
> front end.
> >
> > https://www.dxengineering.com/parts/dxe-rg5000hd
>
> >
> > 73
> > Tim K3LR
> >
> > -----Original Message-----
> > From: Topband [mailto:topband-bounces+k3lr=k3lr.com at contesting.com] On
> Behalf Of Mike Fischer via Topband
> > Sent: Tuesday, October 1, 2024 12:47 PM
> > To: topband at contesting.com
> > Subject: Topband: VE3DO loop
> >
> > Hi Tim
> >
> > Is my receiver guard enough ‘protection’ from my 160 inv L approx 60’
> away from a VE3DO loop?
> >
> > Thank you sir!
> > 73
> > Mike, K7XH
> >
> > Hello Ed
> >
> > There is very little interaction between nearby loops. We are studying
> > interlaced loops that are 90 degrees to each other for four azimuth
> > coverage. I would keep the loops at least 25 feet away from other
> radiators.
> > Also be careful of RX overload from nearby TX.
> >
> > 73
> > Tim K3LR
> >
> > Sent from my iPhone
> >
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