Elecraft › [K2]

K2 No Side Tone After Firmware Upgrade

Classic

List

Threaded

8 messages Options

cstoverva

K2 No Side Tone After Firmware Upgrade

I just aquired my second K2. It's and older one with a 3 digit serial number that I purchased used.

Plans are to build and install a KDSP2. In preparation for that, I upgraded from firmware MCU2.01 / IOC1.02 to MCU2.04 / IOC1.09.
Now I've lost the transmit sidetone. Toggling between sidetone source U8-4 and U6-25 makes no difference. Replacing the old firmware restores the sidetone.

What am I missing? Is there a mod to the control board I need to make? I haven't been able to locate any info. Any ideas?

Thanks.

Chuck K4QS

______________________________________________________________
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

cstoverva

Re: K2 No Side Tone After Firmware Upgrade

Also, this K2 appears to have all of the rev. B mods completed.

-----Original Message-----
From: [hidden email]
To: [hidden email]
Sent: Sun, Mar 14, 2010 1:58 pm
Subject: [Elecraft] K2 No Side Tone After Firmware Upgrade

I just aquired my second K2. It's and older one with a 3 digit serial number
that I purchased used.

Plans are to build and install a KDSP2. In preparation for that, I upgraded
from firmware MCU2.01 / IOC1.02 to MCU2.04 / IOC1.09.
Now I've lost the transmit sidetone. Toggling between sidetone source U8-4 and
U6-25 makes no difference. Replacing the old firmware restores the sidetone.

What am I missing? Is there a mod to the control board I need to make? I
haven't been able to locate any info. Any ideas?

Thanks.

Chuck K4QS

______________________________________________________________
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

______________________________________________________________
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

Don Wilhelm-4

Re: K2 No Side Tone After Firmware Upgrade

In reply to this post by cstoverva

Chuck,

I would wager that your K2 SN is less than 3000 and that your firmware
upgrade is 2.04R (the letter is significant)
If both those conditions are true, you will have to add the wiring to
the Control Board to change the sidetone source from U6 pin 25 to U8 pin 4.
The latest firmware no longer supports sidetone from U6-25.
The wire (and capacitor) to be added can be seen in the KIO2 manual or
the KPA100 manual (download from www.elecraft.com). There is one delete
that must be made as well.
There should have been a note to that effect packed with your 2.04R
firmware upgrade.

If your K2 serial number is above 3000, then the board change should
already be present - do not do any deletes on the control board if the
K2 SN is above 3000 - unless you are adding the Keying Waveshape change.

73,
Don W3FPR

[hidden email] wrote:

> I just aquired my second K2. It's and older one with a 3 digit serial number that I purchased used.
>
> Plans are to build and install a KDSP2. In preparation for that, I upgraded from firmware MCU2.01 / IOC1.02 to MCU2.04 / IOC1.09.
> Now I've lost the transmit sidetone. Toggling between sidetone source U8-4 and U6-25 makes no difference. Replacing the old firmware restores the sidetone.
>
> What am I missing? Is there a mod to the control board I need to make? I haven't been able to locate any info. Any ideas?
>
> Thanks.
>
> Chuck K4QS
>
>

cstoverva

Re: K2 No Side Tone After Firmware Upgrade

Hi Don,

This is K2 sn972 I'm upgrading, so it's an oldy. The firmware chip is 2.04P which I somehow came into possession of while building my first K2 sn5939 a few years ago. I had Elecraft send only the new I/O chip, so the firmware came to me in pieces. I didn't see any notes about circuit modifications in the firmware documentation that I have.

I do have the mods located on page 10 of the KIO2 manual. Just to verify, when you say deletion, are you referring to the cut trace between U6-25 and Q5?

I own a .001uf cap, some hookup wire and an Exacto knife, so I should be able to knock this out in a few minutes.

Thanks for pointing me in the right place.

Chuck K4QS

-----Original Message-----
From: Don Wilhelm <[hidden email]>
To: [hidden email]
Cc: [hidden email]
Sent: Sun, Mar 14, 2010 3:22 pm
Subject: Re: [Elecraft] K2 No Side Tone After Firmware Upgrade

Chuck,

I would wager that your K2 SN is less than 3000 and that your firmware upgrade is 2.04R (the letter is significant)
If both those conditions are true, you will have to add the wiring to the Control Board to change the sidetone source from U6 pin 25 to U8 pin 4.
The latest firmware no longer supports sidetone from U6-25.
The wire (and capacitor) to be added can be seen in the KIO2 manual or the KPA100 manual (download from www.elecraft.com). There is one delete that must be made as well.
There should have been a note to that effect packed with your 2.04R firmware upgrade.

If your K2 serial number is above 3000, then the board change should already be present - do not do any deletes on the control board if the K2 SN is above 3000 - unless you are adding the Keying Waveshape change.

73,
Don W3FPR

[hidden email] wrote:

Don Wilhelm-4

Re: K2 No Side Tone After Firmware Upgrade

Chuck,

While both sidetone sources should be supported in 2.04P, go ahead and
make the change anyway. Yes, make the cut on the trace ging between
U6-25 and Q5. You will add 2 wires. The one from U8-4 to Q5 (make
certain you do not put it on the R-PAK) is the one important for the
sidetone. The long wire from U6 pin 25 and the capacitor is only used
for data communications, and will not be used unless you have either the
KIO2 or the KPA100, but add it anyway just for completeness.

After you make the change, the sidetone source will be only U8-4. If
you added the inductor and the resistor for the sidetone waveshape
during the upgrade, check those components (and the trace cut) carefully
if the sidetone still does not work.

73,
Don W3FPR

[hidden email] wrote:

> Hi Don,
>
> This is K2 sn972 I'm upgrading, so it's an oldy. The firmware chip is 2.04P which I somehow came into possession of while building my first K2 sn5939 a few years ago. I had Elecraft send only the new I/O chip, so the firmware came to me in pieces. I didn't see any notes about circuit modifications in the firmware documentation that I have.
>
> I do have the mods located on page 10 of the KIO2 manual. Just to verify, when you say deletion, are you referring to the cut trace between U6-25 and Q5?
>
> I own a .001uf cap, some hookup wire and an Exacto knife, so I should be able to knock this out in a few minutes.
>
> Thanks for pointing me in the right place.
>
> Chuck K4QS
>
>

cstoverva

Re: K2 No Side Tone After Firmware Upgrade

Done,

The sidetone is up and running. Now to recalibrate the VFO and check a few other things and I will start building the KDSP2.

I have a QRP top with KAT2, KIO2 and KBT2 standing by. #972 will be a fully loaded and up to date K2/10 sitting in the line up with my K1, K2/100 and K3.

Thanks again Don.

Chuck K4QS

-----Original Message-----
From: Don Wilhelm <[hidden email]>
To: [hidden email]
Sent: Sun, Mar 14, 2010 4:42 pm
Subject: Re: [Elecraft] K2 No Side Tone After Firmware Upgrade

Chuck,

While both sidetone sources should be supported in 2.04P, go ahead and
make the change anyway. Yes, make the cut on the trace ging between
U6-25 and Q5. You will add 2 wires. The one from U8-4 to Q5 (make
certain you do not put it on the R-PAK) is the one important for the
sidetone. The long wire from U6 pin 25 and the capacitor is only used
for data communications, and will not be used unless you have either the
KIO2 or the KPA100, but add it anyway just for completeness.

After you make the change, the sidetone source will be only U8-4. If
you added the inductor and the resistor for the sidetone waveshape
during the upgrade, check those components (and the trace cut) carefully
if the sidetone still does not work.

73,
Don W3FPR

[hidden email] wrote:
> Hi Don,
>
> This is K2 sn972 I'm upgrading, so it's an oldy. The firmware chip is 2.04P
which I somehow came into possession of while building my first K2 sn5939 a few
years ago. I had Elecraft send only the new I/O chip, so the firmware came to
me in pieces. I didn't see any notes about circuit modifications in the
firmware documentation that I have.
>
> I do have the mods located on page 10 of the KIO2 manual. Just to verify,
when you say deletion, are you referring to the cut trace between U6-25 and Q5?

>
> I own a .001uf cap, some hookup wire and an Exacto knife, so I should be able
to knock this out in a few minutes.
>
> Thanks for pointing me in the right place.
>
> Chuck K4QS
>
>
______________________________________________________________
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

______________________________________________________________
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

cstoverva

Re: K2 No Side Tone After Firmware Upgrade

Guy,

Who ever owned #972 before me did the B mods to the rig. It came to me equipped with the KSB2, KNB2 and K160RX. I'm going to build the KDSP2 to drop in later. I have the QRP top with a KAT2, KIO2 and KBT2 from K2 #5939 that I built a few years ago.

#5939 is decked out with the KPA100,KDSP2,KSB2,KNB2,K160RX and KAT100 and serves as a back up for my K3.

This arrangement will give me a grab and K2 without having to change tops or even moving the K2 in the shack.

I love the building process, but money is a little tight right now and this one came at the right price. Just made economic sense.

The line up now included a K1, K2/10, K2/100 and a K3/100.

All great rigs.

Chuck K4QS

-----Original Message-----
From: Guy Olinger K2AV <[hidden email]>
To: [hidden email]
Cc: [hidden email]
Sent: Sun, Mar 14, 2010 5:42 pm
Subject: Re: [Elecraft] K2 No Side Tone After Firmware Upgrade

I added DSP to my bought-used K2 #1239 when I did all the A/B mod
upgrades and replaced all the filter crystals, and it was stunning the
difference it made. Once I got the crystal and DSP skirts aligned for
each filter BW slot, it was dynamite, and frankly not so far off K3
performance. I have all the options and the battery top as well. You
doing the A/B mods?

73, Guy.

On Sun, Mar 14, 2010 at 4:09 PM, <[hidden email]> wrote:
>
>
>
> Done,
>
> The sidetone is up and running. Now to recalibrate the VFO and check a few
other things and I will start building the KDSP2.
>
> I have a QRP top with KAT2, KIO2 and KBT2 standing by. #972 will be a fully
loaded and up to date K2/10 sitting in the line up with my K1, K2/100 and K3.

>
> Thanks again Don.
>
> Chuck K4QS
>
>
>
>
>
>
> -----Original Message-----
> From: Don Wilhelm <[hidden email]>
> To: [hidden email]
> Sent: Sun, Mar 14, 2010 4:42 pm
> Subject: Re: [Elecraft] K2 No Side Tone After Firmware Upgrade
>
>
> Chuck,
>
> While both sidetone sources should be supported in 2.04P, go ahead and
> make the change anyway. Yes, make the cut on the trace ging between
> U6-25 and Q5. You will add 2 wires. The one from U8-4 to Q5 (make
> certain you do not put it on the R-PAK) is the one important for the
> sidetone. The long wire from U6 pin 25 and the capacitor is only used
> for data communications, and will not be used unless you have either the
> KIO2 or the KPA100, but add it anyway just for completeness.
>
> After you make the change, the sidetone source will be only U8-4. If
> you added the inductor and the resistor for the sidetone waveshape
> during the upgrade, check those components (and the trace cut) carefully
> if the sidetone still does not work.
>
> 73,
> Don W3FPR
>
> [hidden email] wrote:
>> Hi Don,
>>
>> This is K2 sn972 I'm upgrading, so it's an oldy. The firmware chip is 2.04P
> which I somehow came into possession of while building my first K2 sn5939 a

few
> years ago. I had Elecraft send only the new I/O chip, so the firmware came to
> me in pieces. I didn't see any notes about circuit modifications in the
> firmware documentation that I have.
>>
>> I do have the mods located on page 10 of the KIO2 manual. Just to verify,
> when you say deletion, are you referring to the cut trace between U6-25 and
Q5?

>
>>
>> I own a .001uf cap, some hookup wire and an Exacto knife, so I should be able
> to knock this out in a few minutes.
>>
>> Thanks for pointing me in the right place.
>>
>> Chuck K4QS
>>
>>
> ______________________________________________________________
> 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
>
>
> ______________________________________________________________
> 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
>

cstoverva

Re: K2 No Side Tone After Firmware Upgrade

Oops! That's a grab and go K2........

-----Original Message-----
From: [hidden email]
To: [hidden email]
Cc: [hidden email]
Sent: Sun, Mar 14, 2010 6:43 pm
Subject: Re: [Elecraft] K2 No Side Tone After Firmware Upgrade

Guy,

Who ever owned #972 before me did the B mods to the rig. It came to me equipped
with the KSB2, KNB2 and K160RX. I'm going to build the KDSP2 to drop in later.
I have the QRP top with a KAT2, KIO2 and KBT2 from K2 #5939 that I built a few
years ago.

#5939 is decked out with the KPA100,KDSP2,KSB2,KNB2,K160RX and KAT100 and serves
as a back up for my K3.

This arrangement will give me a grab and K2 without having to change tops or
even moving the K2 in the shack.

I love the building process, but money is a little tight right now and this one
came at the right price. Just made economic sense.

The line up now included a K1, K2/10, K2/100 and a K3/100.

All great rigs.

Chuck K4QS

-----Original Message-----
From: Guy Olinger K2AV <[hidden email]>
To: [hidden email]
Cc: [hidden email]
Sent: Sun, Mar 14, 2010 5:42 pm
Subject: Re: [Elecraft] K2 No Side Tone After Firmware Upgrade

I added DSP to my bought-used K2 #1239 when I did all the A/B mod
upgrades and replaced all the filter crystals, and it was stunning the
difference it made. Once I got the crystal and DSP skirts aligned for
each filter BW slot, it was dynamite, and frankly not so far off K3
performance. I have all the options and the battery top as well. You
doing the A/B mods?

73, Guy.

On Sun, Mar 14, 2010 at 4:09 PM, <[hidden email]> wrote:
>
>
>
> Done,
>
> The sidetone is up and running. Now to recalibrate the VFO and check a few
other things and I will start building the KDSP2.
>
> I have a QRP top with KAT2, KIO2 and KBT2 standing by. #972 will be a fully
loaded and up to date K2/10 sitting in the line up with my K1, K2/100 and K3.

______________________________________________________________
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

______________________________________________________________
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