Dave,
We have been discussing both ways of connecting an SDR.
The trouble is, the very first production run of Eagles did not have the TMP
jack with the 9 MHz tap on the Filter Board. However there was a mod to be
used in conjunction with an external pre-selector, noise cancellor, or even
as an antenna out for a 2nd RX. So the second proposed solution involves
using this jack.
If you are willing to solder onto the boards, I guess you can tap in
anyplace you like.
It seems nobody is able to identify just exactly where the newer Eagle taps
into the 9 MHz line.
The schematics currently posted on the web site do not show this.
73 - Rick, DJ0IP
(Nr. Frankfurt am Main)
-----Original Message-----
From: TenTec [mailto:tentec-bounces@contesting.com] On Behalf Of Peter
Bertini
Sent: Monday, December 29, 2014 5:35 AM
To: tentec@contesting.com
Subject: Re: [TenTec] 9 MHz tap on EAGLE... and then.....
Well, I must be out to lunch, but this is topic asking about a 9 MHz tap on
an Eagle.
If the topic is about adding a full SDR receiver, capable of providing CW
skimmer operations over several band segments, I don't understand why the
topic specifies a 9-MHz tap. That would require a good quality splitter,
after the T/R switch, on the 50 ohm input feeding the receiver section.
You'd also have to put up with perhaps 4 dB of loss, which might affect the
noise floor on 10 meters.
I'll be using a tap after the first mixer on my Omni VI, to provide a 9 MHz
tap via a Clifton Labs buffer amplifier. That will drive a LP-Pan with a
192 kHz soundcard, which will provide full coverage on most of the HF bands
for either CW or SSB. The LP-Pan adapter is a fixed frequency SDR receiver
in its own right.
Pete
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