[Premium-Rx] Longwave Receiver Recommendations?

[sm0aom at telia.com]

>>With synthesized receivers, VLF really separates the men from the boys

Absolutely.

This is why a tremendous amount of engineering man-hours went into
designing the synthesisers of the SRT CR91 and AEG E1800-series receivers.

However, the noise environment at LW makes external noise override even the
synthesiser noise at 30 kHz in a well-designed system. 

The SRT CR91 was specified for a noise figure of 
9 dB down to 100 kHz, and 17 dB at 50 kHz. Usually the actual 
performance was better.

73/
Karl-Arne
SM0AOM
----Ursprungligt meddelande----
Från : premium-rx at mailman.qth.net
Datum : 2020-04-02 - 01:09 ()
Till : jcp at pistritto.org, machine.age at comcast.net
Kopia : Premium-Rx at mailman.qth.net, navydude1962 at yahoo.com
Ämne : Re: [Premium-Rx] Longwave Receiver Recommendations?

 My 651S-1, which has the optional VLF front end module, works the best of all my RXs on VLF.  If yours doesn't have the VLF front end, forget it below 250 KHz I believe.
The 8711A is OK, but seems noisier and less sensitive than the 651S-1.  The URR-74/WJ8716 is pretty good as well.  

.  As you tune closer to the LO, the noise sidebands will increase - sometimes to the point where the S-meter will continue to rise just on noise as you go below 200 KHz or so.   Many receivers stop at 100 KHz or so for this reason.
 
 
-----Original Message-----
From: Joseph Pistritto <jcp at pistritto.org>
To: John England <machine.age at comcast.net>
Cc: Premium-Rx <Premium-Rx at mailman.qth.net>; Edward <navydude1962 at yahoo.com>
Sent: Wed, Apr 1, 2020 6:36 pm
Subject: Re: [Premium-Rx] Longwave Receiver Recommendations?

i added the TenTec RX-340 to this list (which i have one of and like a lot
for doing long wave stuff).
(no i'm not interested in selling mine)
  -jcp-


On Wed, Apr 1, 2020 at 3:27 PM John England <machine.age at comcast.net> wrote:

> A great question indeed. Having experience with each
> of these rigs over the years most are in the same small boat on longwave.
> However, I would say the JRC radios are pretty good. LW was part of JRC’s
> design brief.
> While working with Linear Technology Corp I visited JRC and interviewed
> senior designers years ago. They were always first and foremost a marine
> house; and long wave was part of their brief.
> Have fun. Put up a Beverage antenna if you can.
>
> John England
>
> Sent from my IPhone
>
>
> > On Apr 1, 2020, at 3:16 PM, Edward via Premium-Rx <
> premium-rx at mailman.qth.net> wrote:
> >
> > Greetings to the Group!
> >
> > I have built up quite a collection of Premium Rx and would like to know
> what you would consider as the ideal rx for reception of the Longwave band.
> I have high hopes for this, as I put up a couple of antennas that are quite
> suitable for LW. I am also in the Middle East and hope to hear some
> Europeans and N African stations, plus NDBs.
> >
> > I plan to dedicate 3-4 Rx for this so pls give me your top 3-5 choices
> from the following:
> >
> > -WJ HF-1000A
> > -WJ 8711A
> > -WJ URR-74
> > -Harris R-2368
> > -Racal RA-3791
> > -Racal RA-6793
> > -Racal RA-6790/GM
> > -Hagenuk RX-1001M
> > -AEG E1800/3 (aka Telefunken)
> > -Telefunken E-1501
> > -JRC NRD-93
> > -JRC NRD-75
> > -Drake RR-3
> > -Collins 651-S1
> >
> > Plus some SDRs.
> >
> > Thanks & 73,
> > Ed NI6S/7Z1ES
> >
> >
> >
> >
> >
> > ______________________________________________________________
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