K3: Band outputs to external decoder

[Ralph Parker]

Hi Gang:
#1823 is working well, but I need some advice.

I have previously been using a Yaesu 'MP with a TopTen band decoder to
switch antennas.
Comparing the K3 band0 to band3 outputs (via DB-15 connector) to the Yaesu
outputs, I thought I'd matched them to the TopTen, and made a suitable cable.

CONFIG:KIO3 is set to NOR
K3 BAND0 to BAND3 outputs seem to correlate to TopTen A to D inputs.
The description on P.19 says "This mapping matches that of some third-party
band decoders". I assumed that the TopTen might be one of those.

However, the TopTen does not respond.

Anybody else tried this?
Where have I gone wrong?

VE7XF

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[KK7P]

> Where have I gone wrong?

The K3 provides open collector outputs, so you may need to add some
pull-up resistors to the band outputs.

73,

Lyle KK7P
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[Andy Faber]

Ralph,
I use a top ten Yaesu decoder without modification with my K3 and it works
fine.  The TT box has pull-up resistors already, so you don't have to worry
about that.  The only tricky part is figuring out the pin numbering on the
DB15 on the back of the K3.  I had to use alligator clip leads to get it
right, then wired up a permanent cable.  Also, if you start with a premade
cable, it needs to have all the pins (which some monitor cables don't).
  GL and 73, andy, ae6y
----- Original Message -----
From: "Ralph Parker" <[hidden email]>
To: <[hidden email]>
Sent: Sunday, October 12, 2008 11:48 AM
Subject: [Elecraft] K3: Band outputs to external decoder

> Hi Gang:
> #1823 is working well, but I need some advice.
>
> I have previously been using a Yaesu 'MP with a TopTen band decoder to
> switch antennas.
> Comparing the K3 band0 to band3 outputs (via DB-15 connector) to the Yaesu
> outputs, I thought I'd matched them to the TopTen, and made a suitable
> cable.
>
> CONFIG:KIO3 is set to NOR
> K3 BAND0 to BAND3 outputs seem to correlate to TopTen A to D inputs.
> The description on P.19 says "This mapping matches that of some
> third-party
> band decoders". I assumed that the TopTen might be one of those.
>
> However, the TopTen does not respond.
>
> Anybody else tried this?
> Where have I gone wrong?
>
> VE7XF
>
> _______________________________________________
> 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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