[Icom] Frozen Send relay - 756

Mon, 27 May 2002 08:21:49 -0400

gareth wrote:

>Adam Farson wrote:
>  
>
>>Gary,
>>
>>Are you using an auxiliary keying relay or buffer interface between your IC-756
>>and your amplifier? A suitable interface is required if the amplifier's
>>keying-line voltage and current exceed 16V/0.2A
>>
>>>From your description, it sounds as if the radio's internal reed-type keying
>>relay is welded, and will require replacement. As Van K0KAV suggested, Be sure
>>to connect an interface in the keying line after you get the relay
>>repaired/replaced.
>>
>>Refer to http://www.qsl.net/icom/auxrelay.html
>>
>>You can build your own interface if you wish to.
>>http://www.qsl.net/kk5dr/IcomKeyInterface.html
>>
>>Ameritron makes the ARB series, and the Yaesu FRB-757 may still be available
>>from some dealers or in the used market.
>>
>>[End of debate about the merits or otherwise of amp keying interfaces]
>>
>>Best 73,
>>Adam, VA7OJ/AB4OJ
>>North Vancouver, BC, Canada
>>http://www.qsl.net/ab4oj/
>>Note new e-mail address:
>>mailto:[email protected]
>>
>>-----Original Message-----
>>From: [email protected] [mailto:[email protected]]On
>>Behalf Of gareth
>>Sent: Sunday, May 26, 2002 19:37
>>To: [email protected]
>>Subject: [Icom] Frozen Send relay - 756
>>
>>First it is lines on the scope - (which are getting darker by the
>>QSO) - now, out of the clear blue sky the send relay froze in the TX
>>position. The amp is permanently keyed and will not return to RX.
>>Has anyone else had this problem? I am beginning to think the whole
>>relay will have to be replaced. While I am at it I might as will get
>>a new scope. I wonder if Cliff can do this? Major bummer for sure
>>:<<
>>
>> Gary   N1MSV
>>
>>----
>>Your Moderator: Dick Flanagan W6OLD, [email protected]
>>Icom FAQ: http://www.qsl.net/icom/
>>    
>>
>
>Thanks Adam - great info!
>
> Gary
>----
>Your Moderator: Dick Flanagan W6OLD, [email protected]
>Icom FAQ: http://www.qsl.net/icom/
>
>  
>
Another good way to interface to an amplifier is to use a solid state 
interface such as one found at http://www.qsl.net/k0bx . It's for a 
Kenwood but can easily be adapted to an ICOM using one of the accessory 
outputs. I use it with my PROII. This will eliminate any possible keying 
delay in the external relay, if any exists.

John N1JM