[Elecraft] K2 - low power/reception on 80m

[Don Wilhelm]

Phil,

One thing you can easily and quickly check is that the VCO signal has 
not gone out of range.
Set the K2 to 4000kHz and measure the left end of R30 - it should not be 
above 7.5 volts (nearer to 6 volts is better).  Then tune to 3500kHz and 
again measure the left end of R30 - it should not be below 1.5 volts.  
If it is within that range, the VCO is properly locking.

If it is not within that range, do the VCO Alignment as indicated in the 
manual on page 64 (if the manual is older, you will find it on page 55).

73,
Don W3FPR

On 10/1/2016 2:00 PM, Philippe wrote:
> On Thu, Sep 29, 2016 at 07:12:58PM -0400, Don Wilhelm wrote:
>> Phil,
>>
>> Don't be too quick to draw that conclusion.
>> Note that everything in the Low Pass Filter will appear to be connected to
>> ground at DC.  If you want to make a valid DC resistance check, you have to
>> lift lead 4 of T4 and re-measure.
>>
> Thanks Don.
> You was right, the 2 relays are fine (tested after I lifted T4 lead 4 as suggested).
> I checked also L16 and L17. I removed L17 because I wasn't sure it was properly stripped, and re-soldered it.
> I still have an issue on RX and TX on 80m. :(
>
> I need to go 'deeper'.
>
> 73,
> Phil.
>