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Would you be interested in a K2 PSK31 digital interface card?

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NQ3RP

Would you be interested in a K2 PSK31 digital interface card?

I've tried to find one of EA3BLQ's interface cards for the K2 but have not been successful. So I thought I would design a replacement since I've done PCB designs before. The problem is that if I do it, to keep the cost down, I would have to make a couple of dozen boards. So I wondered if there was any interest out there in obtaining one of his boards. My main interest is in making the K2DI VIII board on this page http://www.qsl.net/ea3blq/k2di_pci_tec_ang.htm . If you would like one please post a reply here. If I get enough responses I'll see about doing the run. If you want the K2DI PCI card also please state that also. If I get two dozen the cost should be about $20 per board ($40 for the two).
If you would like a complete kit state that also. I could do the kit for around $49.50 for both boards and the electronic parts.

Randy Moore

Re: Would you be interested in a K2 PSK31 digital interface card?

I would be interested in both boards and a kit.

73,
Randy, KS4L

On Jun 6, 2010, at 7:40 PM, NQ3RP <[hidden email]> wrote:

>
> I've tried to find one of EA3BLQ's interface cards for the K2 but
> have not
> been successful. So I thought I would design a replacement since
> I've done
> PCB designs before. The problem is that if I do it, to keep the
> cost down,
> I would have to make a couple of dozen boards. So I wondered if
> there was
> any interest out there in obtaining one of his boards. My main
> interest is
> in making the K2DI VIII board on this page
> http://www.qsl.net/ea3blq/k2di_pci_tec_ang.htm . If you would like
> one
> please post a reply here. If I get enough responses I'll see about
> doing
> the run. If you want the K2DI PCI card also please state that
> also. If I
> get two dozen the cost should be about $20 per board ($40 for the
> two).
> If you would like a complete kit state that also. I could do the
> kit for
> around $49.50 for both boards and the electronic parts.
> --
> View this message in context: http://elecraft.365791.n2.nabble.com/Would-you-be-interested-in-a-K2-PSK31-digital-interface-card-tp5147084p5147084.html
> Sent from the Elecraft mailing list archive at Nabble.com.
> ______________________________________________________________
> 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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> Please help support this email list: http://www.qsl.net/donate.html

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Don Wilhelm-4

Re: Would you be interested in a K2 PSK31 digital interface card?

In reply to this post by NQ3RP

This is a great effort, and I applaud John for taking up this task.
Pauli had a great design, and I know there are many who would like to
reproduce it..
Now to relate "the other half of the story" -- when I was offering kits
and boards for the W3FPR Fixed Audio Output, I was amazed to find that
one day that Pauli ordered one. I quickly sent him an email asking why,
since he had developed a great digital interface for the K2, and he
replied that my solution was quite simple and elegant by comparison.
Yes, the microphone and PTT switching must be done in an external
interface box (many do that), but just the addition of a fixed level
audio output alone is very helpful to working digital modes with the K2.

If you are interested in this more simplified solution, check out either
the original design on my website www.w3fpr.com or see the updated board
that Tom Hammond N0SS developed which mounts easily between the Front
Panel and the Control Board. Tom no longer offers either the kits nor
the boards for this design, but he has offered to provide the board
layout to anyone interested. See www.n0ss.net for more information.
The design is not complex and can easily be implemented on perfboard if
you do not want to go the route of ordering a lot of boards (and selling
them to others) from FAR circuits or other board sources.

73,
Don W3FPR

NQ3RP wrote:

> I've tried to find one of EA3BLQ's interface cards for the K2 but have not
> been successful. So I thought I would design a replacement since I've done
> PCB designs before. The problem is that if I do it, to keep the cost down,
> I would have to make a couple of dozen boards. So I wondered if there was
> any interest out there in obtaining one of his boards. My main interest is
> in making the K2DI VIII board on this page
> http://www.qsl.net/ea3blq/k2di_pci_tec_ang.htm . If you would like one
> please post a reply here. If I get enough responses I'll see about doing
> the run. If you want the K2DI PCI card also please state that also. If I
> get two dozen the cost should be about $20 per board ($40 for the two).
> If you would like a complete kit state that also. I could do the kit for
> around $49.50 for both boards and the electronic parts.
>

Guy, K2AV

Re: Would you be interested in a K2 PSK31 digital interface card?

I have a particular need which is not a digital interface per se, but
need to know if this project addresses it, or if some subset addresses
it. This will be used in ongoing rudimentary research on 160m
antennas and ground phenomena currently under way.

I will need a fixed audio output from the RX which is independent of
the AF gain control, which will be fed to a meter reading in dB. We
will be taking field measurements on weak signals on small antennas
from low level self-contained transmitters fitted with small antennas.
I saw N0SS sell off his last remaining fixed audio boards before I
realized what they were. I will probably be encouraging some local
friends to outfit their K2's in a similar fashion.

Also, is the fixed audio board file that N0SS has in a format that can
be fed to one of these small quantity PCB companies, or would it need
to be converted?

73, Guy.

On Sun, Jun 6, 2010 at 11:47 PM, Don Wilhelm <[hidden email]> wrote:

> This is a great effort, and I applaud John for taking up this task.
> Pauli had a great design, and I know there are many who would like to
> reproduce it..
> Now to relate "the other half of the story" -- when I was offering kits
> and boards for the W3FPR Fixed Audio Output, I was amazed to find that
> one day that Pauli ordered one. I quickly sent him an email asking why,
> since he had developed a great digital interface for the K2, and he
> replied that my solution was quite simple and elegant by comparison.
> Yes, the microphone and PTT switching must be done in an external
> interface box (many do that), but just the addition of a fixed level
> audio output alone is very helpful to working digital modes with the K2.
>
> If you are interested in this more simplified solution, check out either
> the original design on my website www.w3fpr.com or see the updated board
> that Tom Hammond N0SS developed which mounts easily between the Front
> Panel and the Control Board. Tom no longer offers either the kits nor
> the boards for this design, but he has offered to provide the board
> layout to anyone interested. See www.n0ss.net for more information.
> The design is not complex and can easily be implemented on perfboard if
> you do not want to go the route of ordering a lot of boards (and selling
> them to others) from FAR circuits or other board sources.
>
> 73,
> Don W3FPR
>
> NQ3RP wrote:
>> I've tried to find one of EA3BLQ's interface cards for the K2 but have not
>> been successful. So I thought I would design a replacement since I've done
>> PCB designs before. The problem is that if I do it, to keep the cost down,
>> I would have to make a couple of dozen boards. So I wondered if there was
>> any interest out there in obtaining one of his boards. My main interest is
>> in making the K2DI VIII board on this page
>> http://www.qsl.net/ea3blq/k2di_pci_tec_ang.htm . If you would like one
>> please post a reply here. If I get enough responses I'll see about doing
>> the run. If you want the K2DI PCI card also please state that also. If I
>> get two dozen the cost should be about $20 per board ($40 for the two).
>> If you would like a complete kit state that also. I could do the kit for
>> around $49.50 for both boards and the electronic parts.
>>
> ______________________________________________________________
> 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
>

NQ3RP

Re: Would you be interested in a K2 PSK31 digital interface card?

Guy -

The boards as designed by EA3BLQ did not provide a "line out" audio signal, so using one of his boards would not provide the type audio you are seeking. While Tom's (N0SS) board does provide a fixed audio, it also requires that you make solder connections to the Control Board of your K2. If you are comfortable with doing that, then I suggest you ask Tom for his files and have a couple of boards made. Please contact Tom @ N0SS (at) arrl.net for any more discussion about your needs. I'm trying to keep this discussion only about those that are interested in the K2DI & PCI boards, thank you.

Joe Subich, W4TV-4

Re: Would you be interested in a K2 PSK31 digital interface card?

> The boards as designed by EA3BLQ did not provide a "line out" audio
> signal,

That is not correct. The EA3BLQ "Digital Interface" board (K2DI v. 3)
provides a buffered/amplified signal from J5 (demodulator output before
the volume control). This is the definition of a "line out" signal.

While not quite the same as Tom's board (Don's design), the EA3BLQ
"K2DI" board is functionally identical on receive and provides for PTT
microphone switching/muting that is missing in Don's design. The
K2DI board can be used on a stand alone basis if one does not need the
"digital mode VOX" (e.g. "tone switching") or transformer input/output
isolation provided in the K2DI-PCI daughter board.

73,

... Joe, W4TV

On 6/7/2010 1:01 PM, NQ3RP wrote:

>
> Guy -
>
> The boards as designed by EA3BLQ did not provide a "line out" audio signal,
> so using one of his boards would not provide the type audio you are seeking.
> While Tom's (N0SS) board does provide a fixed audio, it also requires that
> you make solder connections to the Control Board of your K2. If you are
> comfortable with doing that, then I suggest you ask Tom for his files and
> have a couple of boards made. Please contact Tom @ N0SS (at) arrl.net for
> any more discussion about your needs. I'm trying to keep this discussion
> only about those that are interested in the K2DI& PCI boards, thank you.

jperelst

Re: Would you be interested in a K2 PSK31 digital interface card?

In reply to this post by NQ3RP

I just noticed this post. Sorry for being so late in responding.

The short answer is yes, yes, heck YES!!!

I would love the full kit

Jon
KB1QBZ

Wm Bush

Re: Would you be interested in a K2 PSK31 digital interface card?

I would like an interface kit.

New owner of a K2, and new to the list.

Great Fun.

Bill
KD8JXJ

----- Original Message ----
From: jperelst <[hidden email]>
To: [hidden email]
Sent: Sun, July 11, 2010 8:42:01 AM
Subject: Re: [Elecraft] Would you be interested in a K2 PSK31 digital interface
card?

I just noticed this post. Sorry for being so late in responding.

The short answer is yes, yes, heck YES!!!

I would love the full kit

Jon
KB1QBZ
--
View this message in context:
http://elecraft.365791.n2.nabble.com/Would-you-be-interested-in-a-K2-PSK31-digital-interface-card-tp5147084p5279790.html

Sent from the [K2] mailing list archive at Nabble.com.
______________________________________________________________
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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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

dl6abm

Re: Would you be interested in a K2 PSK31 digital interface card?

In reply to this post by jperelst

I'd like board or kit.
rgds, Holger dl6abm

Clark Ward Jr

Re: Would you be interested in a K2 PSK31 digital interface card?

I'm not done with my K2 yet, but I do a lot of PSK, so I'd like a kit
(or board). Clark KI4GYT

On Sun, Jul 11, 2010 at 10:56 AM, dl6abm <[hidden email]> wrote:

>
> I'd like board or kit.
> rgds, Holger dl6abm
> --
> View this message in context: http://elecraft.365791.n2.nabble.com/Would-you-be-interested-in-a-K2-PSK31-digital-interface-card-tp5147084p5279897.html
> Sent from the [K2] mailing list archive at Nabble.com.
> ______________________________________________________________
> 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
>

--
Clark in Georgia
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Don Wilhelm-4

Re: Would you be interested in a K2 PSK31 digital interface card?

In reply to this post by Wm Bush

Bill,

I do not believe an interface kit is currently available - a kit with
isolation transformers is problematic for the K2/100 because there just
is not room inside for transformers. If you want a simple box to switch
between soundcard input and microphone, take a look at my website
"Switchbox" article www.w3fpr.com - alternately combine that
implementation with the digital interface published in QST for July 2010
page 37.

You might also want to look at the Fixed Audio Output as well, or the
updated version which can be found on Tom Hammond's website -
www.n0ss.net. The Fixed Audio Output is simple enough to construct on
perfboard and can fit between the front panel and control board.

73,
Don W3FPR

Wm Bush wrote:

> I would like an interface kit.
>
> New owner of a K2, and new to the list.
>
> Great Fun.
>
> Bill
> KD8JXJ
>
>
>
>
>
>
> ----- Original Message ----
> From: jperelst <[hidden email]>
> To: [hidden email]
> Sent: Sun, July 11, 2010 8:42:01 AM
> Subject: Re: [Elecraft] Would you be interested in a K2 PSK31 digital interface
> card?
>
>
> I just noticed this post. Sorry for being so late in responding.
>
> The short answer is yes, yes, heck YES!!!
>
> I would love the full kit
>
> Jon
> KB1QBZ
>