Re: [Elecraft] [K2] No RCV audio...

[Don Wilhelm]

Eric,

Your problem seems to be with 40 meters alone.

Do you have the K60XV option (or the Rework Eliminators) installed?  If 
so, go to the secondary menu and check to see that the D19 menu 
parameter is set to "y".

Without that option (or the Rework Eliminators), D19 should be "n".
I suspect the Rework Eliminators are installed since your list of bands 
did not include 60 meters.


If you did not build this K2, you might not know the answer.  Look at 
the VFO area (near relays K13, K14 and K15) to see if D19 and D20 are 
installed - on K2s below SN3000 those varactors are mounted on the 
bottom of the board, remove the bottom cover to see them.
If D19 and D20 are installed, do a 2nd check and find the value of C71 - 
it should be 120pF, and the D19 menu parameter must be set to "y".  
Without D19 and D20, the D19 menu must be set to "n".


I surmise you have D19 and D20 installed and you did a Master Reset 
which leaves the D19 menu set to "n".  If you did that reset, you will 
have to do not only a CAL PLL, but also a CAL FIL and set any menu items 
which pertain to installed options to the parameters which support those 
options.


73,
Don W3FPR

On 5/10/2016 4:12 PM, Eric Thielking wrote:

Don:

Thanks for the help.  The squelch is off.  Taking the testing further, 
it appears that the CAL PLL fails (Info 232) when connected into the 
TP1 test port. The initial frequency I happen to see (when the test 
starts) is 11348.


I happened to read an older post about this subject, and went down 
that road (as you had suggested).  I have found the following results, 
when trying various things, namely:


1.  Voltage Controlled Oscillator Readings.

80m  2.243V to 5.85 V over range of 3.5 to 4.0
40m  8.04V to 8.04V over range of 7.0 to 7.3
30m  2.505 to 2.973V over range of 10 to 10.15
20m  2.363 to 3.95V over range of 14 to 15
17m  3.113 to 3.310 over range of 18 to 18.2
15m  2.001 to 2.995 over range of 21 to 21.45
12m  3.90 to 4.26 over range of 24.8 to 25
10m  3.282 to 4.12 over range of 28 to 28.8

With the band switch set to 40m (7.000) TP1 reads 11348 Khz, rather 
than 11915, as discussed previously. TP3 reads 12094.35, and the range 
test passes (14.4 kHz).


I guess it's not right that the VCO on 40m doesn't appear to change.  
Is that so?  Am I heading in the right direction? Any pointers would 
be appreciated.


Thanks
Eric





On Mon, May 9, 2016 at 11:57 PM, Don Wilhelm > wrote:


Eric,

That is indeed strange.
Go to the secondary menu and see if Squelch might be turned on.
I can't think of another reason at the moment.

73,
Don W3FPR


On 5/9/2016 10:56 PM, Eric Thielking wrote:

My K2 appears to have a receiver problem. Specifically, I
don't hear any
receive audio, unless navigating into the menu systems, at the
'OPT'
section or the 'ATU' section.

When those parts of the menu are active, receive audio can be
heard.  When
one exists the menus, the audio falls off, and the s-meter
indicates no
apparent RF input.






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Re: [Elecraft] [K2] No RCV audio...

[Eric Thielking]

Don:

Thanks for the help.  The squelch is off.  Taking the testing further, it
appears that the CAL PLL fails (Info 232) when connected into the TP1 test
port. The initial frequency I happen to see (when the test starts) is 11348.

I happened to read an older post about this subject, and went down that
road (as you had suggested).  I have found the following results, when
trying various things, namely:

1.  Voltage Controlled Oscillator Readings.

80m  2.243V to 5.85 V over range of 3.5 to 4.0
40m  8.04V to 8.04V over range of 7.0 to 7.3
30m  2.505 to 2.973V over range of 10 to 10.15
20m  2.363 to 3.95V over range of 14 to 15
17m  3.113 to 3.310 over range of 18 to 18.2
15m  2.001 to 2.995 over range of 21 to 21.45
12m  3.90 to 4.26 over range of 24.8 to 25
10m  3.282 to 4.12 over range of 28 to 28.8

With the band switch set to 40m (7.000) TP1 reads 11348 Khz, rather than
11915, as discussed previously. TP3 reads 12094.35, and the range test
passes (14.4 kHz).

I guess it's not right that the VCO on 40m doesn't appear to change.  Is
that so?  Am I heading in the right direction?  Any pointers would be
appreciated.

Thanks
Eric





On Mon, May 9, 2016 at 11:57 PM, Don Wilhelm  wrote:

> Eric,
>
> That is indeed strange.
> Go to the secondary menu and see if Squelch might be turned on.
> I can't think of another reason at the moment.
>
> 73,
> Don W3FPR
>
>
> On 5/9/2016 10:56 PM, Eric Thielking wrote:
>
>> My K2 appears to have a receiver problem.  Specifically, I don't hear any
>> receive audio, unless navigating into the menu systems, at the 'OPT'
>> section or the 'ATU' section.
>>
>> When those parts of the menu are active, receive audio can be heard.  When
>> one exists the menus, the audio falls off, and the s-meter indicates no
>> apparent RF input.
>>
>>
>>
>
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Re: [Elecraft] [K2] No RCV audio...

[Don Wilhelm]

Eric,

That is indeed strange.
Go to the secondary menu and see if Squelch might be turned on.
I can't think of another reason at the moment.

73,
Don W3FPR

On 5/9/2016 10:56 PM, Eric Thielking wrote:

My K2 appears to have a receiver problem.  Specifically, I don't hear any
receive audio, unless navigating into the menu systems, at the 'OPT'
section or the 'ATU' section.

When those parts of the menu are active, receive audio can be heard.  When
one exists the menus, the audio falls off, and the s-meter indicates no
apparent RF input.




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[Elecraft] [K2] No RCV audio...

[Eric Thielking]

My K2 appears to have a receiver problem.  Specifically, I don't hear any
receive audio, unless navigating into the menu systems, at the 'OPT'
section or the 'ATU' section.

When those parts of the menu are active, receive audio can be heard.  When
one exists the menus, the audio falls off, and the s-meter indicates no
apparent RF input.

Is this a control problem (something wrong on control board)?

Tests of K2-100 LP filters, and 1N5711 diodes in the SWR circuitry appear
OK.  This radio has up until now, worked fine.


Any suggestions would be helpful.


Thanks
Eric
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