Has anyone worked out the diode Matrix for the output of the K3 Band0 through
Band3? I am stumbling through the logic hereand well...it has been many
years since I thought about a diode matrix.
Any figured this out yet? Did a quick search on Google and found most people
are using the
Lee,
I us a 74LS145 chip for 1 of 10 band decoder.
very easy to build.
73 Ken K5DNL
---
--- On Thu, 10/7/10, Lee Buller k...@swbell.net wrote:
From: Lee Buller k...@swbell.net
Subject: [Elecraft] Diode Matrix for Band Out on K3
Lee,
Unless you are only trying to decode a few bands, I would find the
decode very difficult (if not impossible) without the use of inverters
to provide both a true and an inverted output for each of the band
outputs. It is much easier to use a 4 to 16 de-mux chip like the
74HC154. One
Ken,
The Band0-Band3 data is identical to Yaesu Band Data for
HF (160-6 meters). Any of the standard BCD to 1 of 10
or HEX to 1 of 16 decoders will work fine. If one were
using the K3 to drive a stack of transceivers and wanted
to be particularly clever, it is possible to use two
decoders if
Here's a great inexpensive band decoder:
http://www.unifiedmicro.com/decoder.html
The outputs are open collector. If you need a 12vdc source
instead, you will need to have a line driver or relay for each
output.
Older K3's will require the External Band Data Pullup part of the
K3 Negative ALC
As is, it doesn't decode 6M. Additional logic and hardware would be
required to decode the 1010 BCD output for 6M.
73 de Brian/K3KO
On 10/7/2010 22:51, Dave Hachadorian wrote:
Here's a great inexpensive band decoder:
http://www.unifiedmicro.com/decoder.html
The outputs are open collector.
And for those who like to melt solder, this is a great project too:
http://home.comcast.net/~kk1l/kk1l_2x6switch/
-
73,
Greg - AB7R
Whidbey Island WA
NA-065
On Thu Oct 7 15:51 , Dave Hachadorian sent:
Here's a great inexpensive band decoder:
Thanks for all the ideas - schematics - and web pages. Excellent stuff.
Thanks
guys.
Lee - K0WA
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