Elecraft

K3 - RX Problem after latest firmware update

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Stewart Baker

K3 - RX Problem after latest firmware update

I am not sure if there is an obscure problem after the latest MCU
and DSP update. Maybe others could check and see if it happens to
them ?

Any band on SSB if I have the DSP set to ALT1 with the Low Cut set
at 0.15 Hz , then after going onto transmit the receiver appears
to be dead. If I set the DSP to NORM by pressing the knob the
receiver suddenly bursts into life...
This happens whether there is any transmit audio or RF out.

73
Stewart G3RXQ
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Greg - AB7R

RE: K3 - RX Problem after latest firmware update

Stewart,

Try installing the new firmware again. I just tried to recreate your report
and the radio performs as expected...no problem with RX after a transmit
with ALT1 set to 0.15 on the LO side.

73
Greg
AB7R

-----Original Message-----
From: [hidden email]
[mailto:[hidden email]]On Behalf Of Stewart Baker
Sent: Sunday, March 09, 2008 11:32 AM
To: Elecraft Reflector
Subject: [Elecraft] K3 - RX Problem after latest firmware update

I am not sure if there is an obscure problem after the latest MCU
and DSP update. Maybe others could check and see if it happens to
them ?

Any band on SSB if I have the DSP set to ALT1 with the Low Cut set
at 0.15 Hz , then after going onto transmit the receiver appears
to be dead. If I set the DSP to NORM by pressing the knob the
receiver suddenly bursts into life...
This happens whether there is any transmit audio or RF out.

73
Stewart G3RXQ
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Post to: [hidden email]
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No virus found in this incoming message.
Checked by AVG.
Version: 7.5.518 / Virus Database: 269.21.7/1322 - Release Date: 3/9/2008
12:17 PM

No virus found in this outgoing message.
Checked by AVG.
Version: 7.5.518 / Virus Database: 269.21.7/1322 - Release Date: 3/9/2008
12:17 PM

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Stewart Baker

RE: K3 - RX Problem after latest firmware update

Greg,
Have re-installed V1.75 & V1.57 again, no change.

Here is a sequence which you might like to try:-

POWER
80m LSB 3780
NORM
LO CUT=0.15
SAV ALT1
NORM
TX ON/OFF
ALT1
TX ON/OFF
Receive may be dead at this point

If not continue with
Select USB
ALT1
TX ON/OFF
Receive dead

Switching bands, modes or NORM always restores receiver.

I do (from my point of view) hope that I am not the only one with
this funny..

73
Stewart G3RXQ

On Sun, 9 Mar 2008 12:30:15 -0700, AB7R wrote:
> Stewart,
>
> Try installing the new firmware again. I just tried to recreate
your report
> and the radio performs as expected...no problem with RX after a
transmit

> with ALT1 set to 0.15 on the LO side.
>
> 73
> Greg
> AB7R
>
>
> -----Original Message-----
> From: [hidden email]
> [mailto:[hidden email]]On Behalf Of Stewart

Baker
> Sent: Sunday, March 09, 2008 11:32 AM
> To: Elecraft Reflector
> Subject: [Elecraft] K3 - RX Problem after latest firmware update
>
>
> I am not sure if there is an obscure problem after the latest
MCU
> and DSP update. Maybe others could check and see if it happens
to
> them ?
>
> Any band on SSB if I have the DSP set to ALT1 with the Low Cut
set

> at 0.15 Hz , then after going onto transmit the receiver appears
> to be dead. If I set the DSP to NORM by pressing the knob the
> receiver suddenly bursts into life...
> This happens whether there is any transmit audio or RF out.
>
> 73
> Stewart G3RXQ
> _______________________________________________
> 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
> No virus found in this incoming message.
> Checked by AVG.
> Version: 7.5.518 / Virus Database: 269.21.7/1322 - Release Date:

Bruce Bowman

Re: K3 - RX Problem after latest firmware update

Hi Stewart-

Like you, I had a problem with my K3 going dead. Unlike you, I bought a
factory-built unit. I did that because I wanted to know it was working
properly from the start. That turned out to be one of those things that
sounds like a good idea but doesn't withstand close scrutiny.

What I saw initially was an occasional error message (ERR PL1) when
switching to another band, then the audio would decay to nothing over a
2 second period. Sometimes I could get it to recover by chnaging bands,
sometimes not.

Since it was factory built, they had me return my K3. They found the
TCXO3-1 oscillator was grounding occasionally. The oscillator would
continue to operate, but grounding it (the case? some component? dunno)
caused the frequency to be pulled about 20 KHz and the receiver would
die. They replaced the oscillator (probably unnecessary), added an
insulator and re-ran VCO calibration. It's been rock-solid ever since.

Bruce, NM5B
Santa Fe, NM

----- Original Message -----
From: "Stewart Baker" <[hidden email]>
To: "AB7R" <[hidden email]>; "Elecraft Reflector"
<[hidden email]>
Sent: Monday, March 10, 2008 5:33 AM
Subject: RE: [Elecraft] K3 - RX Problem after latest firmware update

Greg,
Have re-installed V1.75 & V1.57 again, no change.

Here is a sequence which you might like to try:-

POWER
80m LSB 3780
NORM
LO CUT=0.15
SAV ALT1
NORM
TX ON/OFF
ALT1
TX ON/OFF
Receive may be dead at this point

If not continue with
Select USB
ALT1
TX ON/OFF
Receive dead

Switching bands, modes or NORM always restores receiver.

I do (from my point of view) hope that I am not the only one with
this funny..

73
Stewart G3RXQ

On Sun, 9 Mar 2008 12:30:15 -0700, AB7R wrote:
> Stewart,
>
> Try installing the new firmware again. I just tried to recreate
your report
> and the radio performs as expected...no problem with RX after a
transmit

> with ALT1 set to 0.15 on the LO side.
>
> 73
> Greg
> AB7R
>
>
> -----Original Message-----
> From: [hidden email]
> [mailto:[hidden email]]On Behalf Of Stewart

3/9/2008
> 12:17 PM
>
> No virus found in this outgoing message.
> Checked by AVG.
> Version: 7.5.518 / Virus Database: 269.21.7/1322 - Release Date:
3/9/2008
> 12:17 PM

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_______________________________________________
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Greg - AB7R

Re: K3 - RX Problem after latest firmware update

In reply to this post by Stewart Baker

This was true with some early optional TCXO-3 units that had exposed SMDs on the bottom of the can. There was a capacitor that
could potential short to the metal socket where the missing pin would have been. Hence the addition of the insulation. This is
not a problem with the standard reference oscillator as there are no exposed parts on the bottom.

Stewart, Do you have the optional TCXO-3 and what is the radio's serial number?

-------------------------
73,
Greg - AB7R
Whidbey Island WA
NA-065
K3#0009 and 0319

On Mon Mar 10 13:16 , "Bruce Bowman" sent:

>Hi Stewart-
>
>Like you, I had a problem with my K3 going dead. Unlike you, I bought a
>factory-built unit. I did that because I wanted to know it was working
>properly from the start. That turned out to be one of those things that
>sounds like a good idea but doesn't withstand close scrutiny.
>
>What I saw initially was an occasional error message (ERR PL1) when
>switching to another band, then the audio would decay to nothing over a
>2 second period. Sometimes I could get it to recover by chnaging bands,
>sometimes not.
>
>Since it was factory built, they had me return my K3. They found the
>TCXO3-1 oscillator was grounding occasionally. The oscillator would
>continue to operate, but grounding it (the case? some component? dunno)
>caused the frequency to be pulled about 20 KHz and the receiver would
>die. They replaced the oscillator (probably unnecessary), added an
>insulator and re-ran VCO calibration. It's been rock-solid ever since.
>
>Bruce, NM5B
>Santa Fe, NM
>
>----- Original Message -----
>From: "Stewart Baker" [hidden email]>
>To: "AB7R" [hidden email]>; "Elecraft Reflector"
>[hidden email]>
>Sent: Monday, March 10, 2008 5:33 AM
>Subject: RE: [Elecraft] K3 - RX Problem after latest firmware update
>
>
>Greg,
>Have re-installed V1.75 & V1.57 again, no change.
>
>Here is a sequence which you might like to try:-
>
>POWER
>80m LSB 3780
>NORM
>LO CUT=0.15
>SAV ALT1
>NORM
>TX ON/OFF
>ALT1
>TX ON/OFF
>Receive may be dead at this point
>
>If not continue with
>Select USB
>ALT1
>TX ON/OFF
>Receive dead
>
>Switching bands, modes or NORM always restores receiver.
>
>I do (from my point of view) hope that I am not the only one with
>this funny..
>
>73
>Stewart G3RXQ
>
>On Sun, 9 Mar 2008 12:30:15 -0700, AB7R wrote:
>> Stewart,
>>
>> Try installing the new firmware again. I just tried to recreate
>your report
>> and the radio performs as expected...no problem with RX after a
>transmit
>> with ALT1 set to 0.15 on the LO side.
>>
>> 73
>> Greg
>> AB7R
>>
>>
>> -----Original Message-----
>> From: [hidden email]
>> [[hidden email]','','','')">[hidden email]]On Behalf Of Stewart
>Baker
>> Sent: Sunday, March 09, 2008 11:32 AM
>> To: Elecraft Reflector
>> Subject: [Elecraft] K3 - RX Problem after latest firmware update
>>
>>
>> I am not sure if there is an obscure problem after the latest
>MCU
>> and DSP update. Maybe others could check and see if it happens
>to
>> them ?
>>
>> Any band on SSB if I have the DSP set to ALT1 with the Low Cut
>set
>> at 0.15 Hz , then after going onto transmit the receiver appears
>> to be dead. If I set the DSP to NORM by pressing the knob the
>> receiver suddenly bursts into life...
>> This happens whether there is any transmit audio or RF out.
>>
>> 73
>> Stewart G3RXQ
>> _______________________________________________
>> 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
>> No virus found in this incoming message.
>> Checked by AVG.
>> Version: 7.5.518 / Virus Database: 269.21.7/1322 - Release Date:
>3/9/2008
>> 12:17 PM
>>
>> No virus found in this outgoing message.
>> Checked by AVG.
>> Version: 7.5.518 / Virus Database: 269.21.7/1322 - Release Date:
>3/9/2008
>> 12:17 PM
>
>
>_______________________________________________
>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
>
>
>_______________________________________________
>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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Post to: [hidden email]
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Bruce Bowman

Re: K3 - RX Problem after latest firmware update

In reply to this post by Bruce Bowman

Hi Doug-

Quite a ways behind you at #136. I don't know if they've worked the
insulator into production or if it's a do-it-if-it-needs-it kind of fix.

Bruce, NM5B

> Hi,
> Which serial #? I have #22 and had the same problem. I took it to
> Aptos and it seems to be fixed.
>
> 73, doug
>
> From: "Bruce Bowman" <[hidden email]>
> Date: Mon, 10 Mar 2008 14:16:26 -0600
>
> Hi Stewart-
>
> Like you, I had a problem with my K3 going dead. Unlike you, I
> bought a
> factory-built unit. I did that because I wanted to know it was
> working
> properly from the start. That turned out to be one of those things
> that
> sounds like a good idea but doesn't withstand close scrutiny.
>
> What I saw initially was an occasional error message (ERR PL1) when
> switching to another band, then the audio would decay to nothing
> over a
> 2 second period. Sometimes I could get it to recover by chnaging
> bands,
> sometimes not.
>
> Since it was factory built, they had me return my K3. They found the
> TCXO3-1 oscillator was grounding occasionally. The oscillator would
> continue to operate, but grounding it (the case? some component?
> dunno)
> caused the frequency to be pulled about 20 KHz and the receiver
> would
> die. They replaced the oscillator (probably unnecessary), added an
> insulator and re-ran VCO calibration. It's been rock-solid ever
> since.
>
> Bruce, NM5B
> Santa Fe, NM
>
> ----- Original Message -----
> From: "Stewart Baker" <[hidden email]>
> To: "AB7R" <[hidden email]>; "Elecraft Reflector"
> <[hidden email]>
> Sent: Monday, March 10, 2008 5:33 AM
> Subject: RE: [Elecraft] K3 - RX Problem after latest firmware update
>
>
> Greg,
> Have re-installed V1.75 & V1.57 again, no change.
>
> Here is a sequence which you might like to try:-
>
> POWER
> 80m LSB 3780
> NORM
> LO CUT=0.15
> SAV ALT1
> NORM
> TX ON/OFF
> ALT1
> TX ON/OFF
> Receive may be dead at this point
>
> If not continue with
> Select USB
> ALT1
> TX ON/OFF
> Receive dead
>
> Switching bands, modes or NORM always restores receiver.
>
> I do (from my point of view) hope that I am not the only one with
> this funny..
>
> 73
> Stewart G3RXQ
>
> On Sun, 9 Mar 2008 12:30:15 -0700, AB7R wrote:
> > Stewart,
> >
> > Try installing the new firmware again. I just tried to recreate
> your report
> > and the radio performs as expected...no problem with RX after a
> transmit
> > with ALT1 set to 0.15 on the LO side.
> >
> > 73
> > Greg
> > AB7R
> >
> >
> > -----Original Message-----
> > From: [hidden email]
> > [mailto:[hidden email]]On Behalf Of Stewart
> Baker
> > Sent: Sunday, March 09, 2008 11:32 AM
> > To: Elecraft Reflector
> > Subject: [Elecraft] K3 - RX Problem after latest firmware update
> >
> >
> > I am not sure if there is an obscure problem after the latest
> MCU
> > and DSP update. Maybe others could check and see if it happens
> to
> > them ?
> >
> > Any band on SSB if I have the DSP set to ALT1 with the Low Cut
> set
> > at 0.15 Hz , then after going onto transmit the receiver appears
> > to be dead. If I set the DSP to NORM by pressing the knob the
> > receiver suddenly bursts into life...
> > This happens whether there is any transmit audio or RF out.
> >
> > 73
> > Stewart G3RXQ
> > _______________________________________________
> > 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
> > No virus found in this incoming message.
> > Checked by AVG.
> > Version: 7.5.518 / Virus Database: 269.21.7/1322 - Release Date:
> 3/9/2008
> > 12:17 PM
> >
> > No virus found in this outgoing message.
> > Checked by AVG.
> > Version: 7.5.518 / Virus Database: 269.21.7/1322 - Release Date:
> 3/9/2008
> > 12:17 PM
>
>
> _______________________________________________
> 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
>
>
> _______________________________________________
> 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
>
>

Stewart Baker

Re: K3 - RX Problem after latest firmware update

In reply to this post by Greg - AB7R

No TCX0-3 fitted. Serial number is 307.

73
Stewart G3RXQ
On Mon, 10 Mar 2008 17:16:11 -0400, Greg - AB7R wrote:
> This was true with some early optional TCXO-3 units that had
exposed SMDs on the bottom
> of the can. There was a capacitor that
>
> could potential short to the metal socket where the missing pin
would have been. Hence
> the addition of the insulation. This is
>
> not a problem with the standard reference oscillator as there
are no exposed parts on
> the bottom.
>
>
> Stewart, Do you have the optional TCXO-3 and what is the radio's
serial number?

>
>
> -------------------------
>
> 73,
>
> Greg - AB7R
>
> Whidbey Island WA
>
> NA-065
>
> K3#0009 and 0319
>
>
> On Mon Mar 10 13:16 , "Bruce Bowman" sent:
>
>
>> Hi Stewart-
>>
>>
>> Like you, I had a problem with my K3 going dead. Unlike you, I

bought a
>>
>> factory-built unit. I did that because I wanted to know it was
working
>>
>> properly from the start. That turned out to be one of those
things that
>>
>> sounds like a good idea but doesn't withstand close scrutiny.
>>
>>
>> What I saw initially was an occasional error message (ERR PL1)
when
>>
>> switching to another band, then the audio would decay to
nothing over a
>>
>> 2 second period. Sometimes I could get it to recover by
chnaging bands,
>>
>> sometimes not.
>>
>>
>> Since it was factory built, they had me return my K3. They
found the
>>
>> TCXO3-1 oscillator was grounding occasionally. The oscillator
would
>>
>> continue to operate, but grounding it (the case? some
component? dunno)
>>
>> caused the frequency to be pulled about 20 KHz and the receiver
would
>>
>> die. They replaced the oscillator (probably unnecessary), added
an
>>
>> insulator and re-ran VCO calibration. It's been rock-solid ever
since.

>>
>>
>> Bruce, NM5B
>>
>> Santa Fe, NM
>>
>>
>> ----- Original Message -----
>>
>> From: "Stewart Baker" [hidden email]>
>>
>> To: "AB7R" [hidden email]> "Elecraft Reflector"
>>
>> [hidden email]>
>>
>> Sent: Monday, March 10, 2008 5:33 AM
>>
>> Subject: RE: [Elecraft] K3 - RX Problem after latest firmware

update

>>
>>
>> Greg,
>>
>> Have re-installed V1.75 & V1.57 again, no change.
>>
>>
>> Here is a sequence which you might like to try:-
>>
>>
>> POWER
>>
>> 80m LSB 3780
>>
>> NORM
>>
>> LO CUT=0.15
>>
>> SAV ALT1
>>
>> NORM
>>
>> TX ON/OFF
>>
>> ALT1
>>
>> TX ON/OFF
>>
>> Receive may be dead at this point
>>
>>
>> If not continue with
>>
>> Select USB
>>
>> ALT1
>>
>> TX ON/OFF
>>
>> Receive dead
>>
>>
>> Switching bands, modes or NORM always restores receiver.
>>
>>
>> I do (from my point of view) hope that I am not the only one

with

>>
>> this funny..
>>
>>
>> 73
>>
>> Stewart G3RXQ
>>
>>
>> On Sun, 9 Mar 2008 12:30:15 -0700, AB7R wrote:
>>
>>> Stewart,
>>>
>>>
>>> Try installing the new firmware again. I just tried to

recreate
>>>
>> your report
>>
>>> and the radio performs as expected...no problem with RX after
a

>>>
>> transmit
>>
>>> with ALT1 set to 0.15 on the LO side.
>>>
>>>
>>> 73
>>>
>>> Greg
>>>
>>> AB7R
>>>
>>>
>>> -----Original Message-----
>>>
>>> From: [hidden email]
>>>
>>>

[[hidden email]','','','')">elecraft-bounces@mai
lman.qth.net]On
>>> Behalf Of Stewart
>>>
>> Baker
>>
>>> Sent: Sunday, March 09, 2008 11:32 AM
>>>
>>> To: Elecraft Reflector
>>>
>>> Subject: [Elecraft] K3 - RX Problem after latest firmware
update

>>>
>>>
>>> I am not sure if there is an obscure problem after the latest
>>>
>> MCU
>>
>>> and DSP update. Maybe others could check and see if it happens
>>>
>> to
>>
>>> them ?
>>>
>>>
>>> Any band on SSB if I have the DSP set to ALT1 with the Low Cut
>>>
>> set
>>
>>> at 0.15 Hz , then after going onto transmit the receiver

appears

>>>
>>> to be dead. If I set the DSP to NORM by pressing the knob the
>>>
>>> receiver suddenly bursts into life...
>>>
>>> This happens whether there is any transmit audio or RF out.
>>>
>>>
>>> 73
>>>
>>> Stewart G3RXQ
>>>
>>> _______________________________________________
>>>
>>> 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
>>>
>>> No virus found in this incoming message.
>>>
>>> Checked by AVG.
>>>
>>> Version: 7.5.518 / Virus Database: 269.21.7/1322 - Release

Date:

>>>
>> 3/9/2008
>>
>>> 12:17 PM
>>>
>>>
>>> No virus found in this outgoing message.
>>>
>>> Checked by AVG.
>>>
>>> Version: 7.5.518 / Virus Database: 269.21.7/1322 - Release

Date:

>>>
>> 3/9/2008
>>
>>> 12:17 PM
>>
>>
>> _______________________________________________
>>
>> 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
>>
>>
>> _______________________________________________
>>
>> 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

Greg - AB7R

Re: K3 - RX Problem after latest firmware update

In reply to this post by Stewart Baker

OK Stewart. I did not think that would really be the problem but I wanted to rule it out anyway.

I'm passing this on to Wayne as he is going to have to find what in the firmware that may be causing this to happen. I tried last night and could not
reproduct it, but I have seen very few reports of similar situations.

Tnx for your patience while this is sorted out.

-------------------------
73,
Greg - AB7R
Whidbey Island WA
NA-065
K3#0009 and 0319

On Tue Mar 11 9:12 , Stewart Baker sent:

>No TCX0-3 fitted. Serial number is 307.
>
>73
>Stewart G3RXQ
>On Mon, 10 Mar 2008 17:16:11 -0400, Greg - AB7R wrote:
>> This was true with some early optional TCXO-3 units that had
>exposed SMDs on the bottom
>> of the can. There was a capacitor that
>>
>> could potential short to the metal socket where the missing pin
>would have been. Hence
>> the addition of the insulation. This is
>>
>> not a problem with the standard reference oscillator as there
>are no exposed parts on
>> the bottom.
>>
>>
>> Stewart, Do you have the optional TCXO-3 and what is the radio's
>serial number?
>>
>>
>> -------------------------
>>
>> 73,
>>
>> Greg - AB7R
>>
>> Whidbey Island WA
>>
>> NA-065
>>
>> K3#0009 and 0319
>>
>>
>> On Mon Mar 10 13:16 , "Bruce Bowman" sent:
>>
>>
>>> Hi Stewart-
>>>
>>>
>>> Like you, I had a problem with my K3 going dead. Unlike you, I
>bought a
>>>
>>> factory-built unit. I did that because I wanted to know it was
>working
>>>
>>> properly from the start. That turned out to be one of those
>things that
>>>
>>> sounds like a good idea but doesn't withstand close scrutiny.
>>>
>>>
>>> What I saw initially was an occasional error message (ERR PL1)
>when
>>>
>>> switching to another band, then the audio would decay to
>nothing over a
>>>
>>> 2 second period. Sometimes I could get it to recover by
>chnaging bands,
>>>
>>> sometimes not.
>>>
>>>
>>> Since it was factory built, they had me return my K3. They
>found the
>>>
>>> TCXO3-1 oscillator was grounding occasionally. The oscillator
>would
>>>
>>> continue to operate, but grounding it (the case? some
>component? dunno)
>>>
>>> caused the frequency to be pulled about 20 KHz and the receiver
>would
>>>
>>> die. They replaced the oscillator (probably unnecessary), added
>an
>>>
>>> insulator and re-ran VCO calibration. It's been rock-solid ever
>since.
>>>
>>>
>>> Bruce, NM5B
>>>
>>> Santa Fe, NM
>>>
>>>
>>> ----- Original Message -----
>>>
>>> From: "Stewart Baker" [hidden email]>
>>>
>>> To: "AB7R" [hidden email]> "Elecraft Reflector"
>>>
>>> [hidden email]>
>>>
>>> Sent: Monday, March 10, 2008 5:33 AM
>>>
>>> Subject: RE: [Elecraft] K3 - RX Problem after latest firmware
>update
>>>
>>>
>>> Greg,
>>>
>>> Have re-installed V1.75 & V1.57 again, no change.
>>>
>>>
>>> Here is a sequence which you might like to try:-
>>>
>>>
>>> POWER
>>>
>>> 80m LSB 3780
>>>
>>> NORM
>>>
>>> LO CUT=0.15
>>>
>>> SAV ALT1
>>>
>>> NORM
>>>
>>> TX ON/OFF
>>>
>>> ALT1
>>>
>>> TX ON/OFF
>>>
>>> Receive may be dead at this point
>>>
>>>
>>> If not continue with
>>>
>>> Select USB
>>>
>>> ALT1
>>>
>>> TX ON/OFF
>>>
>>> Receive dead
>>>
>>>
>>> Switching bands, modes or NORM always restores receiver.
>>>
>>>
>>> I do (from my point of view) hope that I am not the only one
>with
>>>
>>> this funny..
>>>
>>>
>>> 73
>>>
>>> Stewart G3RXQ
>>>
>>>
>>> On Sun, 9 Mar 2008 12:30:15 -0700, AB7R wrote:
>>>
>>>> Stewart,
>>>>
>>>>
>>>> Try installing the new firmware again. I just tried to
>recreate
>>>>
>>> your report
>>>
>>>> and the radio performs as expected...no problem with RX after
>a
>>>>
>>> transmit
>>>
>>>> with ALT1 set to 0.15 on the LO side.
>>>>
>>>>
>>>> 73
>>>>
>>>> Greg
>>>>
>>>> AB7R
>>>>
>>>>
>>>> -----Original Message-----
>>>>
>>>> From: [hidden email]
>>>>
>>>>
>[[hidden email]','','','')">elecraft-bounces@mai
>lman.qth.net]On
>>>> Behalf Of Stewart
>>>>
>>> Baker
>>>
>>>> Sent: Sunday, March 09, 2008 11:32 AM
>>>>
>>>> To: Elecraft Reflector
>>>>
>>>> Subject: [Elecraft] K3 - RX Problem after latest firmware
>update
>>>>
>>>>
>>>> I am not sure if there is an obscure problem after the latest
>>>>
>>> MCU
>>>
>>>> and DSP update. Maybe others could check and see if it happens
>>>>
>>> to
>>>
>>>> them ?
>>>>
>>>>
>>>> Any band on SSB if I have the DSP set to ALT1 with the Low Cut
>>>>
>>> set
>>>
>>>> at 0.15 Hz , then after going onto transmit the receiver
>appears
>>>>
>>>> to be dead. If I set the DSP to NORM by pressing the knob the
>>>>
>>>> receiver suddenly bursts into life...
>>>>
>>>> This happens whether there is any transmit audio or RF out.
>>>>
>>>>
>>>> 73
>>>>
>>>> Stewart G3RXQ
>>>>
>>>> _______________________________________________
>>>>
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>>>>
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>>>>
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>>>>
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>Date:
>>>>
>>> 3/9/2008
>>>
>>>> 12:17 PM
>>>>
>>>>
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>Date:
>>>>
>>> 3/9/2008
>>>
>>>> 12:17 PM
>>>
>>>
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>>>
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>>>
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>>>
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>
>