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Diode Matrix for Band Out on K3

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k0wa@swbell.net

Diode Matrix for Band Out on K3

Has anyone worked out the diode Matrix for the output of the K3 Band0 through
Band3? I am stumbling through the logic here....and 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 Elecraft product....but I have a specific idea in mind and need to
figure the diode matrix.

Lee - K0WA

======================================================================
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K5DNL

Re: Diode Matrix for Band Out on K3

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 <[hidden email]> wrote:

> From: Lee Buller <[hidden email]>
> Subject: [Elecraft] Diode Matrix for Band Out on K3
> To: "Elecraft Reflector" <[hidden email]>
> Date: Thursday, October 7, 2010, 4:30 PM
>
>
>
> Has anyone worked out the diode Matrix for the output of
> the K3 Band0 through
> Band3? I am stumbling through the logic here....and
> 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 Elecraft product....but I have a specific
> idea in mind and need to
> figure the diode matrix.
>
> Lee - K0WA
>
> ======================================================================
> In our day and age it seems that Common Sense is in short
> supply. If you don't
> have any Common Sense - get some Common Sense and use
> it. If you can't find any
> Common Sense, ask for help from somebody who has some
> Common Sense. Is Common
> Sense divine?
>
> Common Sense is the image of the Creator expressing
> revealed truth in my mind.
> - J. Wolf
> ______________________________________________________________
> 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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Don Wilhelm-4

Re: Diode Matrix for Band Out on K3

In reply to this post by k0wa@swbell.net

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 will do 160 through 6 meters and another (with an inverter
from ACC pin 7 can decode the transverter bands as well.

73,
Don W3FPR

On 10/7/2010 5:30 PM, Lee Buller wrote:

>
>
> Has anyone worked out the diode Matrix for the output of the K3 Band0 through
> Band3? I am stumbling through the logic here....and 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 Elecraft product....but I have a specific idea in mind and need to
> figure the diode matrix.
>
> Lee - K0WA
>

Joe Subich, W4TV-4

Re: Diode Matrix for Band Out on K3

In reply to this post by k0wa@swbell.net

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 they have an enable input and use DIGOUT0
with a pull-up, buffer and inverter to select either HF/6
or transverter (VHF/UHF/SHF) outputs.

73,

... Joe, W4TV

On 10/7/2010 5:30 PM, Lee Buller wrote:

>
>
>
> Has anyone worked out the diode Matrix for the output of the K3 Band0 through
> Band3? I am stumbling through the logic here....and 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 Elecraft product....but I have a specific idea in mind and need to
> figure the diode matrix.
>
> Lee - K0WA
>

Dave Hachadorian

Re: Diode Matrix for Band Out on K3

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 and Ext Band Data Pull-up Mods in order to work
with this unit. Or, you can buy a REMIOUPGD modified KIO3 Board
from Elecraft for $20.

Newer K3's are good to go with no mods.

Dave Hachadorian, K6LL
Yuma, AZ

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alsopb

Re: Diode Matrix for Band Out on K3

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. 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 and Ext Band Data Pull-up Mods in order to work
> with this unit. Or, you can buy a REMIOUPGD modified KIO3 Board
> from Elecraft for $20.
>
> Newer K3's are good to go with no mods.
>
> Dave Hachadorian, K6LL
> Yuma, AZ
>
>
>
>
>
> ______________________________________________________________
> 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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Greg - AB7R

Re: Diode Matrix for Band Out on K3

In reply to this post by k0wa@swbell.net

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:
>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 and Ext Band Data Pull-up Mods in order to work
>with this unit. Or, you can buy a REMIOUPGD modified KIO3 Board
>from Elecraft for $20.
>
>Newer K3's are good to go with no mods.
>
>Dave Hachadorian, K6LL
>Yuma, AZ
>
>
>
>
>
>______________________________________________________________
>Elecraft mailing list
>Home: http://mailman.qth.net/mailman/listinfo/elecraft
>Help: http://mailman.qth.net/mmfaq.htm
>Post: [hidden email]','','','')">[hidden email]
>
>This list hosted by: http://www.qsl.net
>Please help support this email list: http://www.qsl.net/donate.html

k0wa@swbell.net

Re: Diode Matrix for Band Out on K3

In reply to this post by k0wa@swbell.net

Thanks for all the ideas - schematics - and web pages. Excellent stuff. Thanks
guys.

Lee - K0WA
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