[ICOM] Receive antenna input?

[Paul Playford]

I connected a 1N914 diode, cathode to the MAIN-A UNIT's collector of Q691 
(goes to ground during transmit) and the anode to the RF-A UNIT collector of 
Q101.

Both Q101 and Q691 are open collector and the steering diode will operate 
RL101 during transmit, opening the RANT antenna lead.

RL101 is an AHY103 relay (cheap) which may not be good for QSK.

As usual, I am not responsible, etc., etc., and your smileage may vary.

de Paul, W8AEF


----- Original Message ----- 
From: "Jerry Keller" <k3bz at arrl.net>
To: "ICOM Reflector" <icom at mailman.qth.net>
Sent: Sunday, October 01, 2006 9:47 AM
Subject: Re: [-] Re: [ICOM] Receive antenna input?


> I'd be very interested in the circuit that you used, Paul... wsould you be 
> willing to share it?
> 73, Jerry K3BZ
>
> ----- Original Message ----- 
> From: "Paul Playford" <paul at w8aef.com>
> To: "ICOM Reflector" <icom at mailman.qth.net>
> Sent: Sunday, October 01, 2006 12:29 PM
> Subject: Re: [-] Re: [ICOM] Receive antenna input?
>
>
>> Sorry, my mistreak <grin>.  I wrote that at 5am, a little before I wake 
>> up. However the rest of my response is true.
>>
>> It should be noted that I modified the receive antenna switching to clean 
>> up my transmitted signal, not to protect the receiver.
>>
>> But the modified antenna switching does protects the receiver.
>>
>> de Paul, W8AEF
>>