[Amps] Tl 922 mods

[Vic Rosenthal 4X6GP/K2VCO]

W8ZR designed a sequencer board sold by Harbach which will protect your 
relays, amplifier and transceiver. See <http://w8zr.net/QSK/index.htm>. 
This is the best way. Whatever you do, you should read his QST article 
that is linked there.

If you know that your transceivers provide enough time after asserting 
key out and before producing RF, as well as a reasonable delay after RF 
stops and before key out goes back to the receive state, then you can 
just use a pair of vacuum relays or a vacuum relay and a reed relay to 
replace the open frame relay in the TL922. Exactly how you do this will 
depend on the coil voltage requirements of the relays that you use.

73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/


On 28 Oct 2015 23:04, Arnie Pfingst wrote:
> I have a tl 922a with 10m amp driven by a Kenwood ts 940 or Yaesu ft
> 950 . It all works great except for the slow change over relay in the
> amp. Im using the arb 704 interface for keying. I need a good mod for
> the slow relay! After all this time I'm going to order the Harbach
> soft start, and filter kit and will adjust the FIL voltage as needed.
> Does anybody have any other ideas?ThanksArnie. Kd6cz
>
> Sent via the Samsung Galaxy S®6 active, an AT&T 4G LTE smartphone
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