Ameritron makes a relay the ARB-704 $59.95 that uses rca cables and 12v. HRO might stock them.
"A slip of the foot you may soon recover, but a slip of the tongue you may never get over." Ben Franklin _____ From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Don Nesbitt Sent: Sunday, February 08, 2009 1:44 PM To: 'Phil LaMarche'; elecraft@mailman.qth.net Subject: Re: [Elecraft] Keying an amp Hi Phil - not sure just what you mean here by "take out the keying device and direct, it still keys." - but - if it's the Collins 30L-1, the keying circuit in it presents a negative (-) voltage on the key line - and - unfortunately - the K3 is set up to key an amplifier that presents a positive (+) voltage on the "relay" terminal. Wish the K3 presented a menu item so one could switch between negative keying (older amps) and positive keying but it looks like the MOSFET used will only key positive voltages. Because of this, I use a small homebrew relay box between my K3 and 30L-1. It's a kluge mess but is the simplest solution I've found! 73 es gud dxing - Don N4HH K3/100 #83 _____ From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Phil LaMarche Sent: Sunday, February 08, 2009 12:42 PM To: elecraft@mailman.qth.net Subject: [Elecraft] Keying an amp Hooking up an amplifier through an amp key to key out. Is there any menu that needs to be changed. Don't see it in the book but when I plug in the amp it keys. Take out the keying device and direct, it still keys. Looking in book to no avail. Phil Philip LaMarche LaMarche Enterprises, Inc. <http://www.instantgourmetspices.com/> www.instantgourmetspices.com www.w9dvm.com <http://www.w9dvm.com/> 800-395-7795 pin 02 727-944-3226 FAX 727-937-8834 NASFT 30210 K3 #1605 W9DVM No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.0.233 / Virus Database: 270.10.19/1939 - Release Date: 02/07/09 13:39:00
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