Re: [TenTec] Separate receive antenna for Eagle.

[Carl Moreschi <n4py3@earthlink.net>]

It's not an issue at all as long as the receive antenna and transmit 
antenna are not too close to each other.  I have several radios here 
that do this exact thing.  But it all comes down to antenna separation.
Carl Moreschi N4PY
58 Hogwood Rd
Louisburg, NC 27549
www.n4py.com

On 1/15/2015 4:34 PM, Rick - DJ0IP / NJ0IP wrote:
> SRI, but I think that is VERY DANGEROUS, Carl.
>
> The RX ANT line has a protection relay that grounds the line during TX.
> This protects the RX front end.  Unfortunately it is before the Cable #2
> your are referring to.
>
> Cable #2 is AFTER this relay, so the RX is no longer protected by that
> relay.
> I STRONGLY ADVISE NOT TO DO THIS!
> (Unless of course you use your own external relay to protect the Eagle's
> RX).
>
> 73 - Rick, DJ0IP
> (Nr. Frankfurt am Main)
>
>
> -----Original Message-----
> From: TenTec [mailto:tentec-bounces@contesting.com] On Behalf Of Carl
> Moreschi
> Sent: Thursday, January 15, 2015 10:29 PM
> To: Discussion of Ten-Tec Equipment
> Subject: Re: [TenTec] Separate receive antenna for Eagle.
>
> There's a much easier way with no relays at all.  You would end up with a
> spdt switch to select the receive only antenna.
>
> Inside the Eagle, you will find cable #2.  This cable carries the receive
> signal to the Eagle receiver.  All you have to do is cut this cable and
> bring the two connections out of the back of the Eagle. One end of the cable
> would go to the common of the spdt switch.  The other end of the cable would
> to the normally closed contact of the switch.
> The receive antenna would go to the normally open contact of the switch.
>
> That's all you need.  No relays at all.
>
> Carl Moreschi N4PY
> 58 Hogwood Rd
> Louisburg, NC 27549
> www.n4py.com
>
> On 1/15/2015 4:17 PM, Katz Ajamas wrote:
> > Any suggestions?
> >
> > I'm thinking  3 SPST reed relays . One to switch the Tx antenna. One
> > to switch detuner for the Tx antenna. One to switch the Rx antenna.
> > The reed relays switch in ~1ms so the 17ms transmit antecedent is
> > plenty. They are rated for 10**7 cycles.
> >
> > 73, Bob ah7i/w4
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