Keying an amp
Locked
 
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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 www.w9dvm.com K3 #1605 ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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What amplifier, what Elecraft
transceiver, what keying levels from amp? What do you mean by keying
device?
73, Guy
----- Original Message -----
From: [hidden email]
To: [hidden email]
Sent: Sunday, February 08, 2009 1:41 PM
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 www.w9dvm.com K3 #1605
______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] 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:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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In reply to this post by Phil LaMarche-2
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:[hidden email]] 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:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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In reply to this post by Phil LaMarche-2
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" <[hidden email]> To: "'Christopher Kovacs'" <[hidden email]> Cc: <[hidden email]> 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:[hidden email]] > 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:[hidden email] > > 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:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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In reply to this post by Phil LaMarche-2
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:
[hidden email] [mailto:[hidden email]] On Behalf Of Phil LaMarche 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 www.w9dvm.com K3
#1605 No virus found in this incoming message.
______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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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: [hidden email] [mailto:[hidden email]] On Behalf Of Don Nesbitt Sent: Sunday, February 08, 2009 1:44 PM To: 'Phil LaMarche'; [hidden email] 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:
[hidden email] [mailto:[hidden email]]
On Behalf Of Phil
LaMarche 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 www.w9dvm.com K3
#1605 No virus found in this incoming message. ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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