Guess I can't attach a pic so here's a URL to it
http://www.ah6le.net/k3_key.jpg
Ken
At 07:46 AM 7/18/2016, Ken Arck wrote:
Hi Ken
I too use a DEMI xvtr and used the following circuit to exploit the
K3's capability to set a logic bit on the ACC connector based on band
Ken
At 09:33 PM 7/17/2016, Ken Kontor via Elecraft wrote:
Gentlemen,
I am looking for a circuit that one of you K3 users may have
designed to automatically switch the K3 PTT line between multible
external transverters as the K3 is switched from band to band.
I presently use the K3 PTT line to key my 6m amp driven with 30 w from my K3.
I recently purchased a DEMI 2m HP transverter to drive my 2m 3CX800
amp. The DEMI puts out 50 w with 1 mw of drive from the K3. The
problem I have is when I key the DEMI Transverter from Pin 10 on
the K3 15 Pin accessory socket, the K3 PTT out on the back of the
K3 also Keys my 6m Amp even though the K3 is set to 2m. I need a
circuit that will decode the BCD output from the K3 15 Pin
connector to key the 6m Amp when I am on 6m and automatically
switch the PTT line to the DEMI Transverter when I am on 2m. A
manual switch would be very inconvenient for VHF contesting as one
need to quickly QSY between bands with one station for multiple
points. Also in the future I might add a 432 Transverter and would
like to auto switch the PTT for it also. I would only require
three outputs as I would only switch between 6m, 2m and 70 cm.
I am a Mechanical Engineer with limited Electrical knowledge. I did
build a K2 and can breadboard stuff from a schematic and parts
list, but I am not a circuit designer and have no knowledge of
digital logic stuff other than I know it exists. I am in need of a
designed and tested circuit that is know to work reliably. Given
the circuit diagram and a parts list I could then reproduce it.
Your help is greatly appreciated. Thank you in advance for any
information you can provide.
73, Ken - W8KEN
PS: you may contact me off line at w8...@yahoo.com
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http://www.arcomcontrollers.com/
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we offer complete repeater packages!
AH6LE/R - IRLP Node 3000
http://www.irlp.net
"We don't just make 'em. We use 'em!"
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------------------------------------------------------------------------------
President and CTO - Arcom Communications
Makers of repeater controllers and accessories.
http://www.arcomcontrollers.com/
Authorized Dealers for Kenwood and Telewave and
we offer complete repeater packages!
AH6LE/R - IRLP Node 3000
http://www.irlp.net
"We don't just make 'em. We use 'em!"
______________________________________________________________
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