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Re: [Amps] QSK for TL-922

To: QSKguy@aol.com
Subject: Re: [Amps] QSK for TL-922
From: R.Measures <r@somis.org>
Date: Tue, 19 Oct 2004 07:27:28 -0700
List-post: <mailto:amps@contesting.com>

On Oct 19, 2004, at 4:33 AM, QSKguy@aol.com wrote:


Hello,
I just bought an used TL-922 to get QRO and would like to use it in QSK mode.
I found the Richard Measure interesting site explaining how to modify the
TL-922 but I don't really understand.

- Two high-speed, SPST RF relays are used to replace the stock, pokey, DPDT original T/R switching relay. An electronic cathode bias switch is used to replace the bias switching relay next to the fan. /// note -- the reason that a SPST vacuum relay is required to switch the output is that no DPDT vacuum relay is fast enough.


Is there some TL-922 / QSK owner over there who can explain me how to
integrate this kit in an unmodified amp ?

Make a bracket to hold the 2 RF relays, mount the relays with Silicone rubber adhesive as per <http://www.somis.org/relay-mtg.html>, allow to cure a day or two, remove the original 2 relays, connect the Fig 7 <http://www.somis.org/HSS-diagram.jpg> circuit and the new relays to the points indicated.


A schematic would be great too.
Thanks a lot.

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Richard L. Measures, AG6K, 805.386.3734. www.somis.org


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