RE:split indicator for K2
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Maybe I've finally found a use for the round hole with 8 pins located just to the left of the headphone jack. This would be a splendid home for a nice bright red LED split indicator. Maybe I could use 2 of the pins to power the light. This is probably what the designer had in mind. I wonder what the other 6 pins are for? 73 - Rick - K7MW
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They must be for some kind of analog connection, what I'm not sure. Looking at the schematic it looks like some type of input connector. Maybe this is where you connect the wireless controller so you can hook it to a computer network for remote operation. Ya think? Oh, wait, 8-pins, thats gotta be the built-in rotator controller.
Mark Saunders, KJ7BS Glendale, AZ <><><><><><><><><><> FISTS # 2972 Elecraft K2 S/N 539 <><><><><><><><><><> If it aint fun, you aint doing it right. AZ ScQRPions ============================================================ From: "Rick Dettinger" <[hidden email]> Date: 2005/10/04 Tue PM 02:20:32 EDT To: <[hidden email]> Subject: [Elecraft] RE:split indicator for K2 Maybe I've finally found a use for the round hole with 8 pins located just to the left of the headphone jack. This would be a splendid home for a nice bright red LED split indicator. Maybe I could use 2 of the pins to power the light. This is probably what the designer had in mind. I wonder what the other 6 pins are for? 73 - Rick - K7MW _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ============================================================ _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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In reply to this post by Rick Dettinger-2
Hi Rick:
IF you attempt this (though I suspect you're kidding), be aware that the LED specified for the SPLIT/RIT indicator is a Hi-Eff (e.g. very low current) device. If you (or anyone else) use a regular LED, you will have to add a driver transistor in order to allow the LED to draw more current. The Hi-Eff LED only draws 2 mA of current in the present circuit design. Have fun, kidding or not. Tom N0SS At 01:20 PM 10/4/2005, Rick Dettinger wrote: >Maybe I've finally found a use for the round hole with 8 pins located just >to the left of the headphone jack. This would be a splendid home for a >nice bright red LED split indicator. Maybe I could use 2 of the pins to >power the light. This is probably what the designer had in mind. I wonder >what the other 6 pins are for? 73 - Rick - K7MW >_______________________________________________ >Elecraft mailing list >Post to: [hidden email] >You must be a subscriber to post to the list. >Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > >Help: http://mailman.qth.net/subscribers.htm >Elecraft web page: http://www.elecraft.com _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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Folks,
I just added a hi-current LED to my K2 as a SPLIT/RIT/XIT indicator. Adding the emitter follower transistor was a cinch. I used a 2N2907 PNP transistor, connected the base where the cathode of the lo-cur LED would have been, connected the collector where the anode of the lo-cur LED was to be connected and connected the hi-current LED between the emitter and ground. It worked FB and was plenty bright. 73, Don W3FPR > -----Original Message----- > > Hi Rick: > > IF you attempt this (though I suspect you're kidding), be aware that the > LED specified for the SPLIT/RIT indicator is a Hi-Eff (e.g. very low > current) device. If you (or anyone else) use a regular LED, you will have > to add a driver transistor in order to allow the LED to draw more > current. > The Hi-Eff LED only draws 2 mA of current in the present circuit design. > > Have fun, kidding or not. > > Tom N0SS > > No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.344 / Virus Database: 267.11.9/118 - Release Date: 10/3/2005 _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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In reply to this post by Tom Hammond-3
I do not know how many of the reflector's subscribers have visited Tom's
web-site. I have visited it before but after this exchange I spent an hour on it today reading all of the instructional files. This is an incredible resource. Strongly recommend all to visit (or even re-visit if its been a while)! Thanks Tom! 73 de Neal k3nc -----Original Message----- From: [hidden email] [mailto:[hidden email]] On Behalf Of Tom Hammond Sent: Tuesday, October 04, 2005 9:26 PM To: Rick Dettinger; [hidden email] Subject: Re: [Elecraft] RE:split indicator for K2 Hi Rick: IF you attempt this (though I suspect you're kidding), be aware that the LED specified for the SPLIT/RIT indicator is a Hi-Eff (e.g. very low current) device. If you (or anyone else) use a regular LED, you will have to add a driver transistor in order to allow the LED to draw more current. The Hi-Eff LED only draws 2 mA of current in the present circuit design. Have fun, kidding or not. Tom N0SS At 01:20 PM 10/4/2005, Rick Dettinger wrote: >Maybe I've finally found a use for the round hole with 8 pins located >just to the left of the headphone jack. This would be a splendid home >for a nice bright red LED split indicator. Maybe I could use 2 of the >pins to power the light. This is probably what the designer had in mind. I wonder >what the other 6 pins are for? 73 - Rick - K7MW >_______________________________________________ >Elecraft mailing list >Post to: [hidden email] >You must be a subscriber to post to the list. >Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > >Help: http://mailman.qth.net/subscribers.htm >Elecraft web page: http://www.elecraft.com _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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In reply to this post by Tom Hammond-3
Tom Hammond wrote: > Hi Rick: > > IF you attempt this (though I suspect you're kidding), be aware that > the LED ... > Have fun, kidding or not. > > Tom N0SS > > When I was quite young my Father kept a small device in his shop. It was triangular in shape with three bulbs at each joint connected by large capacioter and (I suspect a resistor. When he would see me coming in the shop, he would connect it to 12 volts and it would light one bulb at a time in rotation. I thought it was pretty neat. With eight pins on that connector looking thing at the lower left of a K2, a fella should be able to make a very nifty rotating light indicator with the right RC constant selected. Best Regards, Terry W9TRB _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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