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Ten Tec Orion II and KPA500

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Barry Simpson

Ten Tec Orion II and KPA500

Gooday all

I use my Ten Tec Orion II with my KPA500 and usually try to manually switch
bands rather than rely on the RF sensing.

I would really like to use the band information output from the Orion II to
automatically switch bands on the KPA500.

Does anybody know of a band decoder which is compatible with both pieces of
equipment or alternatively has anyone designed something home brew to
achieve the purpose.

Thanks in advance to anyone who can help.

Barry Simpson VK2BJ
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Joe Subich, W4TV-4

Re: Ten Tec Orion II and KPA500

> or alternatively has anyone designed something home brew to
> achieve the purpose.

Takes nothing more than a 74LS147 and some pull up resistors
on the inputs and inverters (or open collector transistors with
pull ups) on the outputs. The Orion II band outputs are open
collector - maximum pull-up current is specified in the Orion II
manual.

Everything you need to know to roll your own is in the 74LS147
data sheet.

73,

... Joe, W4TV

On 2021-01-16 6:58 PM, Barry Simpson wrote:

> Gooday all
>
> I use my Ten Tec Orion II with my KPA500 and usually try to manually switch
> bands rather than rely on the RF sensing.
>
> I would really like to use the band information output from the Orion II to
> automatically switch bands on the KPA500.
>
> Does anybody know of a band decoder which is compatible with both pieces of
> equipment or alternatively has anyone designed something home brew to
> achieve the purpose.
>
> Thanks in advance to anyone who can help.
>
> Barry Simpson VK2BJ

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Barry Simpson

Fwd: Ten Tec Orion II and KPA500

In reply to this post by Barry Simpson

Thank you so much to everyone who responded to my request for help as below.

I have now been directed to the February 2014 issue of QST where there is
an article by AD5X which is just what I was looking for.

73

Barry VK2BJ

---------- Forwarded message ---------
From: Barry Simpson <[hidden email]>
Date: Sun, 17 Jan 2021 at 10:58
Subject: Ten Tec Orion II and KPA500
To: Elecraft Mailing List <[hidden email]>

Gooday all

I use my Ten Tec Orion II with my KPA500 and usually try to manually switch
bands rather than rely on the RF sensing.

I would really like to use the band information output from the Orion II to
automatically switch bands on the KPA500.

Does anybody know of a band decoder which is compatible with both pieces of
equipment or alternatively has anyone designed something home brew to
achieve the purpose.

Thanks in advance to anyone who can help.

Barry Simpson VK2BJ
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

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Petr, OK1RP/M0SIS

Re: Ten Tec Orion II and KPA500

In reply to this post by Barry Simpson

Hi Barry,

I know that I am coming too late...:)
I found today this link for decoder:
https://www.ebay.com/itm/12-Band-BCD-Decoder-Yaesu-Elecraft-Apache-Labs/203217549978?hash=item2f50b5ba9a:g:nWoAAOSwl5hf1e1Z

I am not sure about the O2 but it should fit to KPA.

Stay safe!

-----
73 - Petr, OK1RP
"Apple & Elecraft freak"
B:http://ok1rp.blogspot.com
MeWe: https://bit.ly/2HGPoDx
MeWe: https://bit.ly/2FmwvDt
--
Sent from: http://elecraft.365791.n2.nabble.com/
______________________________________________________________
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73 - Petr, OK1RP
"Apple & Elecraft freak"
B:http://ok1rp.blogspot.com
MeWe: https://bit.ly/2HGPoDx
MeWe: https://bit.ly/2FmwvDt

Joe Subich, W4TV-4

Re: Ten Tec Orion II and KPA500

> I am not sure about the O2 but it should fit to KPA.

Not quite. According to the description this board takes
BCD input and provides 12 one line per band active high
outputs. It is just backward from what is needed to
convert the Orion II "one line per band" output to the
BCD for KPA500/KPA1500.

73,

... Joe, W4TV

On 2021-01-17 5:20 PM, Petr, OK1RP/M0SIS wrote:

> Hi Barry,
>
> I know that I am coming too late...:)
> I found today this link for decoder:
> https://www.ebay.com/itm/12-Band-BCD-Decoder-Yaesu-Elecraft-Apache-Labs/203217549978?hash=item2f50b5ba9a:g:nWoAAOSwl5hf1e1Z
>
> I am not sure about the O2 but it should fit to KPA.
>
> Stay safe!
>
>
>
>
>
> -----
> 73 - Petr, OK1RP
> "Apple & Elecraft freak"
> B:http://ok1rp.blogspot.com
> MeWe: https://bit.ly/2HGPoDx
> MeWe: https://bit.ly/2FmwvDt
> --

Elecraft mailing list

Re: Ten Tec Orion II and KPA500

In reply to this post by Joe Subich, W4TV-4

Probably do not need pull-ups on the outputs. The KPA500 has pull-ups on its band inputs, with a series protective diode that isolates it from any external pull-ups.
If you use the drivers with other equipment the pull-ups may be needed, but they should don’t be needed with just the KPA500.

73!
Jack, W6FB

> On Jan 16, 2021, at 5:44 PM, Joe Subich, W4TV <[hidden email]> wrote:
>
>
> > or alternatively has anyone designed something home brew to
> > achieve the purpose.
>
> Takes nothing more than a 74LS147 and some pull up resistors
> on the inputs and inverters (or open collector transistors with
> pull ups) on the outputs. The Orion II band outputs are open
> collector - maximum pull-up current is specified in the Orion II
> manual.
>
> Everything you need to know to roll your own is in the 74LS147
> data sheet.
>
> 73,
>
> ... Joe, W4TV
>
>
> On 2021-01-16 6:58 PM, Barry Simpson wrote:
>> Gooday all
>> I use my Ten Tec Orion II with my KPA500 and usually try to manually switch
>> bands rather than rely on the RF sensing.
>> I would really like to use the band information output from the Orion II to
>> automatically switch bands on the KPA500.
>> Does anybody know of a band decoder which is compatible with both pieces of
>> equipment or alternatively has anyone designed something home brew to
>> achieve the purpose.
>> Thanks in advance to anyone who can help.
>> Barry Simpson VK2BJ
>
>
> ______________________________________________________________
> 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
> Message delivered to [hidden email]