[TenTec] 9 MHz tap on EAGLE... and then.....

Rick - DJ0IP / NJ0IP Rick at DJ0IP.de
Mon Dec 29 06:27:43 EST 2014


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 at contesting.com] On Behalf Of Peter
Sent: Monday, December 29, 2014 5:35 AM
To: tentec at 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.

TenTec mailing list
TenTec at contesting.com

More information about the TenTec mailing list