Has anyone used this approach? http://www.bobsamerica.com/swl.html
I am curious how it compares in actual use to the old Ameco or Palomar
preselectors
Paul K0UYA
----- Original Message -----
From: "Rick - DJ0IP / NJ0IP" <Rick@DJ0IP.de>
To: "'Discussion of Ten-Tec Equipment'" <tentec@contesting.com>
Sent: Monday, August 06, 2012 2:48 PM
Subject: Re: [TenTec] preselectors
> For the Omni VII and Eagle, you do not have to worry about keying the
> preselector's radio.
> Both of those Ten-Tecs have provisioned for inserting the preselector in
> the
> receiver's circuitry, out of the TX path.
>
> Also, you don't need any gain, all that one needs today is improved
> preselection.
> Our current radios are sensitive enough.
>
> 73
> Rick, DJ0IP
>
> -----Original Message-----
> From: tentec-bounces@contesting.com [mailto:tentec-bounces@contesting.com]
> On Behalf Of Geoffrey S. Mendelson
> Sent: Monday, August 06, 2012 9:16 PM
> To: Discussion of Ten-Tec Equipment
> Subject: Re: [TenTec] preselectors
>
> On 8/6/12 10:04 PM, Michael Tortorella wrote:
>> Hi all,
>> Following up on a recent thread from Rick DJ0IP, I am moved to ask if
>> anyone has any opinions on the Palomar Engineers preselector? (I am
>> not at home right now so can't look for the model number, sorry). Or
>> how about the old RME DB-23? Or even the Ameco preselectors (PT-
>> series).
>
> I really love the PT-3 I bought in the late 1980s. I bought it because my
> Sony IFC-2010 just did not have the RF gain I wanted. I later bought a
> Kenwood R-5000 and an NRD-535 and while they both had the gain, the
> PT-3 was still appreciated.
>
> I did the second receiver mod, which allows you to have a second receiver
> connected and both mutes it and protects it from RF "leakage"
> from the transmitter.
>
> It claims to have 18db gain, I can't verify or disprove it, but mine added
> at least 10db gain by my various S meters.
>
> The preselector is also good, but I can't measure it or even approximate
> at
> the moment.
>
> The only problem with it in a TenTec context is that it is time delayed
> QSK
> not full QSK. I'm sure you can set the delay time to be very short, but
> probably not short enough for QSK, even at slow speeds.
>
> I think they are still sold.
>
> 73,
>
> Geoff.
>
> --
> Geoffrey S. Mendelson, N3OWJ/4X1GM/KBUH7245/KBUW5379
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