Phil, don't hook this up directly any more. By my information the 30L1 has a minus (-)170 VDC key line. You are actually keying 811A final tube grid cutoff bias, not a relay in the 30L1. This line was meant to be hooked up to a relay in one of the Collins S-line units.
The K3 only handles POSITIVE keying voltages. You will have to use an intermediate relay to key the 30L1. Many have modified the Collins to provide a more standard positive 12V through the coil of a reed relay which in turn grounds the -170 volt grid cutoff bias from the 30L1. This is a different problem than the +120V from the old SB220 amps, which the K3 *can* key. 73, Guy. ----- Original Message ----- From: "Phil LaMarche" <[email protected]> To: "'Christopher Kovacs'" <[email protected]> Cc: <[email protected]> Sent: Sunday, February 08, 2009 2:05 PM Subject: Re: [Elecraft] Keying an amp > > When I take the cable from the K3 directly to the 30L-1 it keys the amp > w/o > being manually keyed. It's in Key Out. > > > Philip LaMarche > LaMarche Enterprises, Inc. > www.instantgourmetspices.com > > www.w9dvm.com > 800-395-7795 pin 02 > 727-944-3226 > FAX 727-937-8834 > NASFT 30210 > > K3 #1605 > W9DVM > > > > -----Original Message----- > From: Christopher Kovacs [mailto:[email protected]] > Sent: Sunday, February 08, 2009 12:51 PM > To: Phil LaMarche > Subject: Re: [Elecraft] Keying an amp > > What kind of amplifier are you using? You have to be careful about the > keying voltage and polarity. > > Chris > > Phil LaMarche wrote: >> 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 >> > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
