[TenTec] Separate receive antenna for Eagle.

[Carl Moreschi]

The Omni VII does not ground its receive only antenna connection either. 
  But it does have a spark gap to protect from high voltages.  So the 
addition of a spark gap on the receive only line would be a reasonable 
safety factor.

As long as there is more than 150 feet separation I see no problem 
anyway.  Most receive only antenna connections on radios are not 
protected but they do caution about adequate 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 at 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
>> _______________________________________________
>> TenTec mailing list
>> TenTec at contesting.com
>> http://lists.contesting.com/mailman/listinfo/tentec
>>
> _______________________________________________
> TenTec mailing list
> TenTec at contesting.com
> http://lists.contesting.com/mailman/listinfo/tentec
>
> _______________________________________________
> TenTec mailing list
> TenTec at contesting.com
> http://lists.contesting.com/mailman/listinfo/tentec
>