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K2 problems

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wsm-3

K2 problems

Hi

Well I have K2 #5846 with all components in the enclosure, but it's
not doing what I hoped for.

Have been trying to align it and this is what I am getting.
80 meters no receive or output.
40 meters 20 watts out and no receive.
30 meters 10 watts out and very weak receive.
20 meters 1 watt out and no receive.
17 meters no output and no receive.
15 meters no output or receive.
12 meters no output or receive.
10 meters no output or receive.

The output measured with a heathkit meter, which is very close to
being accurate, but not calabrated.
On the first power up before begining alignment I had a very weak
recieive on 15 meters.
The signal source for tuning it is another transceiver with output
set to 5 watts.
At one time I had a good receive signal on 40 meters but lost it in
tuning the other frequencies.
I think the problem is in the receiver, but don't know where to
start looking. Have checked for cold solder joints several times.
Anyone have any ideas?
Thanks
Scott N5SM

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Don Wilhelm-3

RE: K2 problems

Scott,

Go back to the Receive Bandpass filter alignment in the manual.

Do not attempt transmit until you have peaked the bandpass filters on
receive. If any do not peak, stop and resolve that problem before moving
forward. If all bands do not show a proper peak, then you have a problem in
the mixer or IF or audio stages somewhere.

You may have to resort to the Receiver Signal Tracing steps in the
Troubleshooting section of the manual.

After the receiver is working properly, then you may move on to the transmit
tests.

The most likely is that you will find your problem either in the soldering
or in a misplaced component.

73,
Don W3FPR

> -----Original Message-----
>
> Well I have K2 #5846 with all components in the enclosure, but it's
> not doing what I hoped for.
>
> Have been trying to align it and this is what I am getting.
> 80 meters no receive or output.
> 40 meters 20 watts out and no receive.
> 30 meters 10 watts out and very weak receive.
> 20 meters 1 watt out and no receive.
> 17 meters no output and no receive.
> 15 meters no output or receive.
> 12 meters no output or receive.
> 10 meters no output or receive.
>
> The output measured with a heathkit meter, which is very close to
> being accurate, but not calabrated.
> On the first power up before begining alignment I had a very weak
> recieive on 15 meters.
> The signal source for tuning it is another transceiver with output
> set to 5 watts.
> At one time I had a good receive signal on 40 meters but lost it in
> tuning the other frequencies.
> I think the problem is in the receiver, but don't know where to
> start looking. Have checked for cold solder joints several times.
> Anyone have any ideas?
> Thanks
> Scott N5SM
>

srife

RE: K2 problems

What were your results when completeing each stage of the build?
Were the alignment requirements met at each one of those stages? If they
were, then you should at least have a good receive on each band. I don't
know what would have changed so drastically that you now have no receive at
all...not to mention the transmitter.

I would probably start at the beginning and do each stage of the
realignment again, and if you come to an alignment step that does not meet
expectations, start your trouble shooting at that point.

Stan Rife
W5EWA
Houston, TX

> -----Original Message-----
>
> Well I have K2 #5846 with all components in the enclosure, but it's
> not doing what I hoped for.
>
> Have been trying to align it and this is what I am getting. 80 meters
> no receive or output. 40 meters 20 watts out and no receive.
> 30 meters 10 watts out and very weak receive.
> 20 meters 1 watt out and no receive.
> 17 meters no output and no receive.
> 15 meters no output or receive.
> 12 meters no output or receive.
> 10 meters no output or receive.
>
> The output measured with a heathkit meter, which is very close to
> being accurate, but not calabrated. On the first power up before
> begining alignment I had a very weak recieive on 15 meters.
> The signal source for tuning it is another transceiver with output
> set to 5 watts.
> At one time I had a good receive signal on 40 meters but lost it in
> tuning the other frequencies.
> I think the problem is in the receiver, but don't know where to
> start looking. Have checked for cold solder joints several times.
> Anyone have any ideas?
> Thanks
> Scott N5SM
>

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