[Heathkit] Amp Keying Interface?

[Bob McGraw - K4TAX]

All ya'll need to stop by the shack and listen to the PTT on my RCA BTA 1R1. 
Damn thing shakes the floor when keyed and unkeyed.

Now, them's relays in action.  No puny woosey stuff for me.  If one can't 
get in the transmitter and sit down, then the darn thing is too small to be 
of any value.

73
Bob, K4TAX
----- Original Message ----- 
From: "Rick Brashear" <rickbras at airmail.net>
To: "'Peter Markavage'" <manualman at juno.com>; <heathkit at mailman.qth.net>
Sent: Tuesday, July 31, 2007 2:24 PM
Subject: RE: [Heathkit] Amp Keying Interface?


> Yeah Pete, but you don't get to hear the KERCHUNK!  That's the part I 
> like.
>
> Rick/K5IAR
>
>
> Yuck! Keying circuit of whatever... keying relay... keying relay - Sounds
> like a telephone switching office design. Solid-state switching is quick,
> quiet, and reliable.
>
> Pete, wa2cwa
>
> On Tue, 31 Jul 2007 14:35:56 -0400 john <johnmb at nc.rr.com> writes:
>> Yep! Might be nice to put a diode across the coil to clamp the coil
>> when
>> the 12V is removed.
>>
>> John K5MO
>>
>>
>> At 02:05 PM 7/31/2007, Bob McGraw - K4TAX wrote:
>> >Be advised that Harbach Electronics is closed due to health reasons
>> and
>> >not accepting orders at this time.
>> >
>> >A simple keying interface is a 12VDC coil relay with N.O. contacts
>>
>> >available from Radio Shack.  Enclose same in a small "project box"
>> with a
>> >couple of connectors of your choice.  The 12V is from the FT-847
>> and the
>> >normal keying ckt and the N.O. contacts go to the SB-200.  The
>> project
>> >should cost about $6.00 for all the parts and then have the fun of
>>
>> >building something that works.
>> >
>> >73
>> >Bob, K4TAX
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