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K3 PK-232 FSK RTTY Setup

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Ed Gray W0SD

K3 PK-232 FSK RTTY Setup

For those now or in the future wanting to setup the PK-232 with the K3
using FSK here is the information. I would think you could do this very
similarly for the Hal and other TNC'S. Of course the specific wiring
would be different but the same general hook up should work. This set
up does not use the computer sound card at all.

First you need a software program to control the PK-232 or the TNC you
are going to use. I used Writelog but there are other software programs
that will work.

The PK-232 has a cable from it to a serial COM port port on your
computer which you need to set up in your software, in my case Writelog.
That is all you need between the PK-232 and the computer. There is
absolutely nothing hooked to the computer sound card.

The K3 should be set to FSK D, see page 31 of the K3 manual revision D1.
Next you should be sure your software program is set up for the same
tone and shift that you have the K3 set to. On the K3 activate pitch
and set it accordingly. Most common would be 2125-170 which is what I
have Writelog set at.

From the K3 run an audio line from the line out to the Radio 1 or Radio
2 RX input on the PK-232. This jack is hooked respectively to the same
place as J4 or J6 which is the 5 pin flat connector. I would suggest
using Radio 1 and running an audio cable from the K3 line out to J3
which is the Radio 1 RX input. The K3 end is a sterio plug and the
PK-232 is a mono plug. On the K3 go ahead and use a stereo cable and
plug it into the K3 line out. On the PK-232 end of this cable cut off
the stereo plug and solder on a mono plug. The tip from the stereo plug
should be hooked to the tip of the mono plug which will be the left
channel. This will be the K3 audio. The ring(one next to the tip)
would be the SUB so just leave it unhooked and hook the barrel from the
stereo plug to the ground of the mono plug. Go to the K3 config:Line
out. I set it for about about 25. Remember the K3 manual is talking
about sound card input when they mention 10 and here we are talking
about input into the PK-232. The PK-232 manual says to have at least 200
mv RMS of receive audio. Using my scope and then calculating RMS I came
up with the setting of 25 to get 200 mv RMS. It is better to be a
little low than too high so you don't have distortion.

For FSK transmit you need to hook the PK-232 FSK keying which is pin 1
of the DIN plug J7 to Pin 1 FSK Input of the K3 accessory plug. You
hook the ground, Pin 2 of J7 to Pin 5 of the K3 accessory plug. J7 on
the back of the PK-232 is labeled so that is easy. The K3 accessory
jack information is on page 18 of the K3 manual revision D1.

Be sure and note that the picture you are looking at in the K3 manual of
the accessory jack is the radio pin out and not the plug on the cable
you are making so be careful to use the correct pins. I just took a
Video cable and cut the female connector off and used the appropriate
wires to hook to the PK-232. The extra wires can be folded back and cut
to different lengths and heat shrink tubing put over them so no wires
can short to each other.

From J4 on the PK-232 which is the 5 pin flat connector hook up the PTT
line Pin 5 to the K3 accessory plug pin 4. This should complete the FSK
setup for the K3 with the PK-232.

Ed W0SD

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Don Wilhelm-4

Re: K3 PK-232 FSK RTTY Setup

Ed,

I would highly recommend that you use a bare 15 pin connector rather
than a video cable. There are only 2 wires required, FSK IN and Ground.
The video cables (cut off defunct monitors) that I have encountered have
several pins connected together which will tie together those pins on
the K3 ACC connector - can create some operational anomalies.
I don't recall which pins are tied together, but the standard video
cable pinout should be available somewhere on the internet, and Google
can find it easily.

73,
Don W3FPR

Ed Gray W0SD wrote:

> For those now or in the future wanting to setup the PK-232 with the K3
> using FSK here is the information. I would think you could do this very
> similarly for the Hal and other TNC'S. Of course the specific wiring
> would be different but the same general hook up should work. This set
> up does not use the computer sound card at all.
>
> First you need a software program to control the PK-232 or the TNC you
> are going to use. I used Writelog but there are other software programs
> that will work.
>
> The PK-232 has a cable from it to a serial COM port port on your
> computer which you need to set up in your software, in my case
> Writelog. That is all you need between the PK-232 and the computer.
> There is absolutely nothing hooked to the computer sound card.
>
> The K3 should be set to FSK D, see page 31 of the K3 manual revision D1.
> Next you should be sure your software program is set up for the same
> tone and shift that you have the K3 set to. On the K3 activate pitch
> and set it accordingly. Most common would be 2125-170 which is what I
> have Writelog set at.
>
> From the K3 run an audio line from the line out to the Radio 1 or Radio
> 2 RX input on the PK-232. This jack is hooked respectively to the
> same place as J4 or J6 which is the 5 pin flat connector. I would
> suggest using Radio 1 and running an audio cable from the K3 line out
> to J3 which is the Radio 1 RX input. The K3 end is a sterio plug and
> the PK-232 is a mono plug. On the K3 go ahead and use a stereo cable
> and plug it into the K3 line out. On the PK-232 end of this cable cut
> off the stereo plug and solder on a mono plug. The tip from the
> stereo plug should be hooked to the tip of the mono plug which will be
> the left channel. This will be the K3 audio. The ring(one next to
> the tip) would be the SUB so just leave it unhooked and hook the
> barrel from the stereo plug to the ground of the mono plug. Go to
> the K3 config:Line out. I set it for about about 25. Remember the K3
> manual is talking about sound card input when they mention 10 and here
> we are talking about input into the PK-232. The PK-232 manual says to
> have at least 200 mv RMS of receive audio. Using my scope and then
> calculating RMS I came up with the setting of 25 to get 200 mv RMS.
> It is better to be a little low than too high so you don't have
> distortion.
>
> For FSK transmit you need to hook the PK-232 FSK keying which is pin 1
> of the DIN plug J7 to Pin 1 FSK Input of the K3 accessory plug. You
> hook the ground, Pin 2 of J7 to Pin 5 of the K3 accessory plug. J7 on
> the back of the PK-232 is labeled so that is easy. The K3 accessory
> jack information is on page 18 of the K3 manual revision D1.
>
> Be sure and note that the picture you are looking at in the K3 manual of
> the accessory jack is the radio pin out and not the plug on the cable
> you are making so be careful to use the correct pins. I just took a
> Video cable and cut the female connector off and used the appropriate
> wires to hook to the PK-232. The extra wires can be folded back and cut
> to different lengths and heat shrink tubing put over them so no wires
> can short to each other.
>
> From J4 on the PK-232 which is the 5 pin flat connector hook up the PTT
> line Pin 5 to the K3 accessory plug pin 4. This should complete the
> FSK setup for the K3 with the PK-232.
>
> Ed W0SD
>

Ed Gray W0SD

Re: K3 PK-232 FSK RTTY Setup

Don,
http://pinouts.ws/db15-vga-pinout.html shows the pin out and I don't
see any pins connected together unless the grounds are common. I did
check a lot of pins with the DMM but I did not find any in common but I
did not check each and everyone. I will do that. Anyway your point is
well taken as running 3 wires as PTT is also required makes more sense
than having all the extra although the molded plug is nice for reliability.

Ed W0SD

Don Wilhelm wrote:

> Ed,
>
> I would highly recommend that you use a bare 15 pin connector rather
> than a video cable. There are only 2 wires required, FSK IN and Ground.
> The video cables (cut off defunct monitors) that I have encountered have
> several pins connected together which will tie together those pins on
> the K3 ACC connector - can create some operational anomalies.
> I don't recall which pins are tied together, but the standard video
> cable pinout should be available somewhere on the internet, and Google
> can find it easily.
>
> 73,
> Don W3FPR

Richard Ferch

Re: K3 PK-232 FSK RTTY Setup

In reply to this post by Ed Gray W0SD

Ed Gray said:

> The PK-232 has a cable from it to a serial COM port port on your
> computer which you need to set up in your software, in my case Writelog.
> That is all you need between the PK-232 and the computer. There is
> absolutely nothing hooked to the computer sound card.

Actually, if you want the best of both worlds you can run an audio cable
between the PK-232 or the radio and the computer's sound card line in jack,
and use MMTTY as a second decoder. If you have room on your computer
monitor's screen, you can watch both decoders (PK-232 and MMTTY) running in
parallel - sometimes one copies when the other doesn't. I haven't done this
with the K3 yet, but I have used this trick with other radios. You can
either use a Y-connector at the radio or the PK-232, or if you connect the
radio's line out to the PK-232's 5-pin connector (J4), you can connect a
cable between the PK-232's phone jack (J3) and the sound card (the audio
inputs on J3 and J4 are connected directly together, so in effect there is a
Y-connector inside the PK-232).

In addition to giving you two decoders, this also lets you use MMTTY's
crossed-ellipse X-Y tuning display, which you may prefer to the PK-232's LED
tuning indicator. You can configure the MMTTY X-Y display to rotate in the
same direction as the radio's tuning knob, which seems to simplify the
hand-eye coordination process while tuning in signals.

73,
Rich VE3KI

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Ed Gray W0SD

Re: K3 PK-232 FSK RTTY Setup

In reply to this post by Ed Gray W0SD

After reading the various posts on the K3 ACC DB15 it seems to be much
better practice to use Cat cable or some twisted pair wire and solder to
a bare DB15 as Don and others have suggested so I have ordered some
tonight. The best source I found was L-COMM. I have added this for
those doing a search for this topic will see this excellent suggestion
and can make an informed decision.

Thanks, Don and others!

Ed W0SD

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Ed Gray W0SD

Re: K3 PK-232 FSK RTTY Setup

In reply to this post by Richard Ferch

Rich,

I have read Don AA5AU discussion on this and this is the next thing to
do now that I have my two K3's wired up for FSK RTTY. I can do this as
part of the process in getting ready for the ARRL RTTY Roundup. I have
a 24 inch LCD monitor screen so hopefully I can find room. Thanks for
the excellent suggestion and information.

Richard Ferch wrote:

> Ed Gray said:
>
>> The PK-232 has a cable from it to a serial COM port port on your
>> computer which you need to set up in your software, in my case Writelog.
>> That is all you need between the PK-232 and the computer. There is
>> absolutely nothing hooked to the computer sound card.
>
> Actually, if you want the best of both worlds you can run an audio cable
> between the PK-232 or the radio and the computer's sound card line in jack,
> and use MMTTY as a second decoder. If you have room on your computer
> monitor's screen, you can watch both decoders (PK-232 and MMTTY) running in
> parallel - sometimes one copies when the other doesn't. I haven't done this
> with the K3 yet, but I have used this trick with other radios. You can
> either use a Y-connector at the radio or the PK-232, or if you connect the
> radio's line out to the PK-232's 5-pin connector (J4), you can connect a
> cable between the PK-232's phone jack (J3) and the sound card (the audio
> inputs on J3 and J4 are connected directly together, so in effect there is a
> Y-connector inside the PK-232).
>
> In addition to giving you two decoders, this also lets you use MMTTY's
> crossed-ellipse X-Y tuning display, which you may prefer to the PK-232's LED
> tuning indicator. You can configure the MMTTY X-Y display to rotate in the
> same direction as the radio's tuning knob, which seems to simplify the
> hand-eye coordination process while tuning in signals.
>
> 73,
> Rich VE3KI
>
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dave.wilburn

Re: K3 PK-232 FSK RTTY Setup

In reply to this post by Ed Gray W0SD

I'm in the process of picking up a PK-232, primarily for EmComm /
Pactor 1. I'm not intending to start a passionate discussion between
FSK / AFSK, but had a question.

I have been running AFSK since I received my K3 last March. It has
worked well, but it is the only RTTY I have known. I have seen the
reason given for running FSK vs. AFSK as the ability to use the
radio's filters. That is a moot point in the K3.

I also understand that when using FSK, it is a different distribution
of resources. I have MMTTY running with N1MM (when I am contesting),
and MMTTY triggers the radio via VOX. This has the annoyance that
when I click on a SSB spot, then a noise in the shack triggers the VOX
kicks in and causes feedback.

Now to my question. If I am happy with how the RTTY is performing now
using AFSK, what is the incentive to setup for FSK?

Dave Wilburn
NM4M

Ed Gray W0SD wrote:

> For those now or in the future wanting to setup the PK-232 with the K3
> using FSK here is the information. I would think you could do this very
> similarly for the Hal and other TNC'S. Of course the specific wiring
> would be different but the same general hook up should work. This set
> up does not use the computer sound card at all.
>
> First you need a software program to control the PK-232 or the TNC you
> are going to use. I used Writelog but there are other software programs
> that will work.
>
> The PK-232 has a cable from it to a serial COM port port on your
> computer which you need to set up in your software, in my case Writelog.
> That is all you need between the PK-232 and the computer. There is
> absolutely nothing hooked to the computer sound card.
>
> The K3 should be set to FSK D, see page 31 of the K3 manual revision D1.
> Next you should be sure your software program is set up for the same
> tone and shift that you have the K3 set to. On the K3 activate pitch
> and set it accordingly. Most common would be 2125-170 which is what I
> have Writelog set at.
>
> From the K3 run an audio line from the line out to the Radio 1 or Radio
> 2 RX input on the PK-232. This jack is hooked respectively to the same
> place as J4 or J6 which is the 5 pin flat connector. I would suggest
> using Radio 1 and running an audio cable from the K3 line out to J3
> which is the Radio 1 RX input. The K3 end is a sterio plug and the
> PK-232 is a mono plug. On the K3 go ahead and use a stereo cable and
> plug it into the K3 line out. On the PK-232 end of this cable cut off
> the stereo plug and solder on a mono plug. The tip from the stereo plug
> should be hooked to the tip of the mono plug which will be the left
> channel. This will be the K3 audio. The ring(one next to the tip)
> would be the SUB so just leave it unhooked and hook the barrel from the
> stereo plug to the ground of the mono plug. Go to the K3 config:Line
> out. I set it for about about 25. Remember the K3 manual is talking
> about sound card input when they mention 10 and here we are talking
> about input into the PK-232. The PK-232 manual says to have at least 200
> mv RMS of receive audio. Using my scope and then calculating RMS I came
> up with the setting of 25 to get 200 mv RMS. It is better to be a
> little low than too high so you don't have distortion.
>
> For FSK transmit you need to hook the PK-232 FSK keying which is pin 1
> of the DIN plug J7 to Pin 1 FSK Input of the K3 accessory plug. You
> hook the ground, Pin 2 of J7 to Pin 5 of the K3 accessory plug. J7 on
> the back of the PK-232 is labeled so that is easy. The K3 accessory
> jack information is on page 18 of the K3 manual revision D1.
>
> Be sure and note that the picture you are looking at in the K3 manual of
> the accessory jack is the radio pin out and not the plug on the cable
> you are making so be careful to use the correct pins. I just took a
> Video cable and cut the female connector off and used the appropriate
> wires to hook to the PK-232. The extra wires can be folded back and cut
> to different lengths and heat shrink tubing put over them so no wires
> can short to each other.
>
> From J4 on the PK-232 which is the 5 pin flat connector hook up the PTT
> line Pin 5 to the K3 accessory plug pin 4. This should complete the FSK
> setup for the K3 with the PK-232.
>
> Ed W0SD
>
>
>
>
> _______________________________________________
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>

Greg - AB7R

RE: K3 PK-232 FSK RTTY Setup

When using AFSK and Vox are you using the K3's Line In for the audio source?
If so the mic should not be live
unless you have the menu item set for MIC+LINE set to YES.

You can also set PTT and not use VOX by using the same RS232 port the radio
is on. Set it in the software and
set CONFIG PTT-KEY to RTS-OFF or DTR-OFF (set the software to match the line
you set).

73
Greg
AB7R

-----Original Message-----
From: [hidden email]
[mailto:[hidden email]]On Behalf Of David Wilburn
Sent: Thursday, December 18, 2008 7:25 AM
To: Elecraft Discussion List
Subject: Re: [Elecraft] K3 PK-232 FSK RTTY Setup

I'm in the process of picking up a PK-232, primarily for EmComm /
Pactor 1. I'm not intending to start a passionate discussion between
FSK / AFSK, but had a question.

I have been running AFSK since I received my K3 last March. It has
worked well, but it is the only RTTY I have known. I have seen the
reason given for running FSK vs. AFSK as the ability to use the
radio's filters. That is a moot point in the K3.

I also understand that when using FSK, it is a different distribution
of resources. I have MMTTY running with N1MM (when I am contesting),
and MMTTY triggers the radio via VOX. This has the annoyance that
when I click on a SSB spot, then a noise in the shack triggers the VOX
kicks in and causes feedback.

Now to my question. If I am happy with how the RTTY is performing now
using AFSK, what is the incentive to setup for FSK?

Dave Wilburn
NM4M

Ed Gray W0SD wrote:

> For those now or in the future wanting to setup the PK-232 with the K3
> using FSK here is the information. I would think you could do this very
> similarly for the Hal and other TNC'S. Of course the specific wiring
> would be different but the same general hook up should work. This set
> up does not use the computer sound card at all.
>
> First you need a software program to control the PK-232 or the TNC you
> are going to use. I used Writelog but there are other software programs
> that will work.
>
> The PK-232 has a cable from it to a serial COM port port on your
> computer which you need to set up in your software, in my case Writelog.
> That is all you need between the PK-232 and the computer. There is
> absolutely nothing hooked to the computer sound card.
>
> The K3 should be set to FSK D, see page 31 of the K3 manual revision D1.
> Next you should be sure your software program is set up for the same
> tone and shift that you have the K3 set to. On the K3 activate pitch
> and set it accordingly. Most common would be 2125-170 which is what I
> have Writelog set at.
>
> From the K3 run an audio line from the line out to the Radio 1 or Radio
> 2 RX input on the PK-232. This jack is hooked respectively to the same
> place as J4 or J6 which is the 5 pin flat connector. I would suggest
> using Radio 1 and running an audio cable from the K3 line out to J3
> which is the Radio 1 RX input. The K3 end is a sterio plug and the
> PK-232 is a mono plug. On the K3 go ahead and use a stereo cable and
> plug it into the K3 line out. On the PK-232 end of this cable cut off
> the stereo plug and solder on a mono plug. The tip from the stereo plug
> should be hooked to the tip of the mono plug which will be the left
> channel. This will be the K3 audio. The ring(one next to the tip)
> would be the SUB so just leave it unhooked and hook the barrel from the
> stereo plug to the ground of the mono plug. Go to the K3 config:Line
> out. I set it for about about 25. Remember the K3 manual is talking
> about sound card input when they mention 10 and here we are talking
> about input into the PK-232. The PK-232 manual says to have at least 200
> mv RMS of receive audio. Using my scope and then calculating RMS I came
> up with the setting of 25 to get 200 mv RMS. It is better to be a
> little low than too high so you don't have distortion.
>
> For FSK transmit you need to hook the PK-232 FSK keying which is pin 1
> of the DIN plug J7 to Pin 1 FSK Input of the K3 accessory plug. You
> hook the ground, Pin 2 of J7 to Pin 5 of the K3 accessory plug. J7 on
> the back of the PK-232 is labeled so that is easy. The K3 accessory
> jack information is on page 18 of the K3 manual revision D1.
>
> Be sure and note that the picture you are looking at in the K3 manual of
> the accessory jack is the radio pin out and not the plug on the cable
> you are making so be careful to use the correct pins. I just took a
> Video cable and cut the female connector off and used the appropriate
> wires to hook to the PK-232. The extra wires can be folded back and cut
> to different lengths and heat shrink tubing put over them so no wires
> can short to each other.
>
> From J4 on the PK-232 which is the 5 pin flat connector hook up the PTT
> line Pin 5 to the K3 accessory plug pin 4. This should complete the FSK
> setup for the K3 with the PK-232.
>
> Ed W0SD
>
>
>
>
> _______________________________________________
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>

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KK7P

Re: K3 PK-232 FSK RTTY Setup

In reply to this post by dave.wilburn

> Now to my question. If I am happy with how the RTTY is performing now
> using AFSK, what is the incentive to setup for FSK?

I think you answered your own question :-)

In the olden days, before good SSB rigs were common, direct FSK was the
best -- perhaps the only -- way to generate clean RTTY signals.

Modern radios like the K3 offer excellent carrier and opposite sideband
suppression, so AFSK can generate signals every bit as good as FSK, at
least on a practical basis. I'm sure there will be some who will be
aghast and strongly differ with this assertion, but the point is that
using AFSK on the K3 for RTTY operation works very well.

73,

Lyle KK7P
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Richard Ferch

Re: K3 PK-232 FSK RTTY Setup

In reply to this post by Ed Gray W0SD

First, I agree with Greg that there is a better alternative to VOX that
doesn't require any additional hardware. Configure either RTS or DTR on your
radio port in N1MM Logger for PTT and make the corresponding choice in the
K3's CONFIG: PTT-KEY menu item.

As for FSK vs. AFSK, with the K3 there appears to be no difference as far as
performance is concerned. The differences are simply in the way you
interface the radio to the computer and the way you configure the MMTTY
software to transmit.

If you already have a device or interface that does FSK keying (e.g. a TU
like the PK-232 or a microKeyer with the appropriate cables for the K3),
then the choice is between using an audio patch cable to the K3's LINE IN
jack for AFSK or a keying cable to the ACC connector for FSK.

If you do not have an external FSK keying device with the necessary cables
you will probably find AFSK easier to hook up than FSK. For AFSK all you
need is an audio patch cable. For FSK you will need an extra serial port on
the computer as well as a keying circuit (one transistor) to convert the
keying signal from RS-232 to TTL voltage levels.

As regards software configuration, if you are using MMTTY you may find it
slightly easier to configure MMTTY to transmit using AFSK than FSK. With FSK
there is also a possibility that you will need to configure the K3's FSK
polarity setting to get the transmit polarity correct.

Bottom line: if you have a PS-232, go ahead and use it for FSK. If you do
not, AFSK is the simpler choice.

73,
Rich VE3KI

Dave Wilburn wrote:

> I'm in the process of picking up a PK-232, primarily for EmComm /
> Pactor 1. I'm not intending to start a passionate discussion between
> FSK / AFSK, but had a question.
>
> I have been running AFSK since I received my K3 last March. It has
> worked well, but it is the only RTTY I have known. I have seen the
> reason given for running FSK vs. AFSK as the ability to use the
> radio's filters. That is a moot point in the K3.
>
> I also understand that when using FSK, it is a different distribution
> of resources. I have MMTTY running with N1MM (when I am contesting),
> and MMTTY triggers the radio via VOX. This has the annoyance that
> when I click on a SSB spot, then a noise in the shack triggers the VOX
> kicks in and causes feedback.
>
> Now to my question. If I am happy with how the RTTY is performing now
> using AFSK, what is the incentive to setup for FSK?
>

dave.wilburn

Re: K3 PK-232 FSK RTTY Setup

In reply to this post by dave.wilburn

Thanks for all of the replies. I use VOX with MMTTY, because in the
past there was a sharing problem with some programs needing to access
the ports. When contesting I use N1MM / MMTTY. When I was just RTTY
hamming, I was using ACLOG and MMTTY, which did not like to share.

Now I have setup DX Labs, and will likely use that and WinWarbler for
general digital hamming, but the frequencies and modes are all over
the place at the moment, from the default setup. Need to play with it
some more and get it setup. Thus I can likely use the RTS DTS
settings now.

Dave Wilburn
NM4M

David Wilburn wrote:

> I'm in the process of picking up a PK-232, primarily for EmComm / Pactor
> 1. I'm not intending to start a passionate discussion between FSK /
> AFSK, but had a question.
>
> I have been running AFSK since I received my K3 last March. It has
> worked well, but it is the only RTTY I have known. I have seen the
> reason given for running FSK vs. AFSK as the ability to use the radio's
> filters. That is a moot point in the K3.
>
> I also understand that when using FSK, it is a different distribution of
> resources. I have MMTTY running with N1MM (when I am contesting), and
> MMTTY triggers the radio via VOX. This has the annoyance that when I
> click on a SSB spot, then a noise in the shack triggers the VOX kicks in
> and causes feedback.
>
> Now to my question. If I am happy with how the RTTY is performing now
> using AFSK, what is the incentive to setup for FSK?
>
> Dave Wilburn
> NM4M
>
> Ed Gray W0SD wrote:
>> For those now or in the future wanting to setup the PK-232 with the K3
>> using FSK here is the information. I would think you could do this very
>> similarly for the Hal and other TNC'S. Of course the specific wiring
>> would be different but the same general hook up should work. This set
>> up does not use the computer sound card at all.
>>
>> First you need a software program to control the PK-232 or the TNC you
>> are going to use. I used Writelog but there are other software programs
>> that will work.
>>
>> The PK-232 has a cable from it to a serial COM port port on your
>> computer which you need to set up in your software, in my case
>> Writelog. That is all you need between the PK-232 and the computer.
>> There is absolutely nothing hooked to the computer sound card.
>>
>> The K3 should be set to FSK D, see page 31 of the K3 manual revision D1.
>> Next you should be sure your software program is set up for the same
>> tone and shift that you have the K3 set to. On the K3 activate pitch
>> and set it accordingly. Most common would be 2125-170 which is what I
>> have Writelog set at.
>>
>> From the K3 run an audio line from the line out to the Radio 1 or Radio
>> 2 RX input on the PK-232. This jack is hooked respectively to the
>> same place as J4 or J6 which is the 5 pin flat connector. I would
>> suggest using Radio 1 and running an audio cable from the K3 line out
>> to J3 which is the Radio 1 RX input. The K3 end is a sterio plug and
>> the PK-232 is a mono plug. On the K3 go ahead and use a stereo cable
>> and plug it into the K3 line out. On the PK-232 end of this cable cut
>> off the stereo plug and solder on a mono plug. The tip from the
>> stereo plug should be hooked to the tip of the mono plug which will be
>> the left channel. This will be the K3 audio. The ring(one next to
>> the tip) would be the SUB so just leave it unhooked and hook the
>> barrel from the stereo plug to the ground of the mono plug. Go to
>> the K3 config:Line out. I set it for about about 25. Remember the K3
>> manual is talking about sound card input when they mention 10 and here
>> we are talking about input into the PK-232. The PK-232 manual says to
>> have at least 200 mv RMS of receive audio. Using my scope and then
>> calculating RMS I came up with the setting of 25 to get 200 mv RMS.
>> It is better to be a little low than too high so you don't have
>> distortion.
>>
>> For FSK transmit you need to hook the PK-232 FSK keying which is pin 1
>> of the DIN plug J7 to Pin 1 FSK Input of the K3 accessory plug. You
>> hook the ground, Pin 2 of J7 to Pin 5 of the K3 accessory plug. J7 on
>> the back of the PK-232 is labeled so that is easy. The K3 accessory
>> jack information is on page 18 of the K3 manual revision D1.
>>
>> Be sure and note that the picture you are looking at in the K3 manual of
>> the accessory jack is the radio pin out and not the plug on the cable
>> you are making so be careful to use the correct pins. I just took a
>> Video cable and cut the female connector off and used the appropriate
>> wires to hook to the PK-232. The extra wires can be folded back and cut
>> to different lengths and heat shrink tubing put over them so no wires
>> can short to each other.
>>
>> From J4 on the PK-232 which is the 5 pin flat connector hook up the PTT
>> line Pin 5 to the K3 accessory plug pin 4. This should complete the
>> FSK setup for the K3 with the PK-232.
>>
>> Ed W0SD
>>
>>
>>
>>
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