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4044# dead

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Ian Maude

4044# dead

Hi all,
#4044 has died. It simply stopped working during the ARRL contest last
weekend. It does not receive, transmit or speak to the PC. I have
tried a full reset to no avail and I have removed the PA. The fault
seems to lie on the rf board somewhere and I would appreciate some
pointers. I guess it can't be that serious, it is just where to look.

Cheers

Ian
--
Ian Maude G0VGS Morecambe Lancs UK | [hidden email]
Sysop of GB7MBC, the Morecambe Bay Cluster
Running Linux and DXSpider | K2 #4044

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Ian Maude

Re: 4044# dead

On Fri, 2005-03-11 at 10:08 +0000, Ian J Maude wrote:
> Hi all,
> #4044 has died. It simply stopped working during the ARRL contest last
> weekend. It does not receive, transmit or speak to the PC. I have
> tried a full reset to no avail and I have removed the PA. The fault
> seems to lie on the rf board somewhere and I would appreciate some
> pointers. I guess it can't be that serious, it is just where to look.
I really should have added that the on/off, display, menus etc all work.
The K2 sees the additional boards etc so it would seem that DC power is
not the problem.

Ian

--
Ian Maude G0VGS Morecambe Lancs UK | [hidden email]
Sysop of GB7MBC, the Morecambe Bay Cluster
Running Linux and DXSpider | K2 #4044

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Don Wilhelm-3

RE: 4044# dead

In reply to this post by Ian Maude

Ian,

It is difficult to say where the problem might be when all I really know is
'it is broken'.

The best place to start is to determine what does work. Do you have
voltages anywhere (check input and output of the regulators on the control
board)? Are the voltage readings good (compare with the chart in the back
of the K2 manual). If the menu works, enter CAL FCTR and use the counter
probe to see if you have VFO and BFO oscillators running? Is their
frequency correct? Continue with this process until you can narrow the
field of potential places to look for the failure.

73,
Don W3FPR

> -----Original Message-----
>
> Hi all,
> #4044 has died. It simply stopped working during the ARRL contest last
> weekend. It does not receive, transmit or speak to the PC. I have
> tried a full reset to no avail and I have removed the PA. The fault
> seems to lie on the rf board somewhere and I would appreciate some
> pointers. I guess it can't be that serious, it is just where to look.
>
> Cheers
>
> Ian
>

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Geoffrey Mackenzie-Kennedy-2

Re: 4044# dead

In reply to this post by Ian Maude

Ian,
My K2/100 #3255 suddenly died a couple of months ago. It had been listening
on 28.200 MHz for several hours, no transmit, which it had done before
often. None of the front panel controls (except the DC ON / OFF ) including
the tuning control worked, and no audio.The display showed the last
"working" frequency i.e. 28.200, and the wretched thing sat there grinning
like Cheshire Cat. Turning off DC power for a few mins made no difference.
Turning off power for about seven hours, and then back on, resulted in
normal operation for about a minute - then back to not working as before. So
I turned off DC power, and left it. About 15 hours later, turned on DC power
and everything was working as normal and has been ever since.

My conclusion is that something in the firmware got itself muddled up, and
somehow got sorted after a rest. It was not a hardware fault.

For what it's worth.

Good luck es 73,

Geoff.
GM4ESD

----- Original Message -----
From: "Ian J Maude" <[hidden email]>
To: <[hidden email]>
Sent: Friday, March 11, 2005 10:08 AM
Subject: [Elecraft] 4044# dead

> Hi all,
> #4044 has died. It simply stopped working during the ARRL contest last
> weekend. It does not receive, transmit or speak to the PC. I have
> tried a full reset to no avail and I have removed the PA. The fault
> seems to lie on the rf board somewhere and I would appreciate some
> pointers. I guess it can't be that serious, it is just where to look.
>
> Cheers
>
> Ian
> --
> Ian Maude G0VGS Morecambe Lancs UK | [hidden email]
> Sysop of GB7MBC, the Morecambe Bay Cluster
> Running Linux and DXSpider | K2 #4044
>
>

G3VVT

Re: 4044# dead

In reply to this post by Ian Maude

In a message dated 11/03/05 12:00:13 GMT Standard Time, [hidden email]
writes:

The best place to start is to determine what does work. Do you have
voltages anywhere (check input and output of the regulators on the control
board)? Are the voltage readings good (compare with the chart in the back
of the K2 manual). If the menu works, enter CAL FCTR and use the counter
probe to see if you have VFO and BFO oscillators running? Is their
frequency correct? Continue with this process until you can narrow the
field of potential places to look for the failure.

Hi Ian,

I would echo what Don has to say plus if you are having to get down to
serious signal tracing it may be better to get down to the basic K2, remove the
KSB2 and fit C167 (0.001uf) on tails to J11 pins 7 to 12, shorting links on
J9/J10 pins 1 to 3. The KSB2 RFC1/2 can stop things working if they short to the
xtal cans.

Bob, G3VVT
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Ian Maude

Re: 4044# dead

In reply to this post by Ian Maude

On Fri, 2005-03-11 at 11:54 +0000, Ian J Maude wrote:

> I really should have added that the on/off, display, menus etc all
> work.
> The K2 sees the additional boards etc so it would seem that DC power
> is
> not the problem.
ok, getting there. I decided as I had already done a reset that I would
start the alignment steps again. It would seem that the PLL range is in
order but I get nothing except a row of zero's when looking at the VCO
on TP1. It should be between 8 and 10MHz so I am getting close. Now
down to those pesky voltages :-)

Ian

--
Ian Maude G0VGS Morecambe Lancs UK | [hidden email]
Sysop of GB7MBC, the Morecambe Bay Cluster
Running Linux and DXSpider | K2 #4044

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Ian Maude

Re: 4044# dead (Solved)

On Fri, 2005-03-11 at 12:19 +0000, Ian J Maude wrote:
Problem solved. Thanks to all that enailed with help. As I suspected
it was down to a poorly soldered joint. I warmed up quite a few
connections in that area to be honest so I cannot be sure which did it.
The main thing is that everything has once again sprung into life. Now
to get on with setting those filters again!

Ian

--
Ian Maude G0VGS Morecambe Lancs UK | [hidden email]
Sysop of GB7MBC, the Morecambe Bay Cluster
Running Linux and DXSpider | K2 #4044

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