[Elecraft] K2 Receive tuning blips

2007-01-23 Thread Jim Miller 
As I tune the K2 across the band I get periodic little blips. They aren't 
birdies and they don't hinder reception. As I sit either side of the 
frequency where the blip occurred there is no apparent signal or 
interference. They actually tic the S-meter a few notches as well. The blip 
occurs when the display changes from 3-4 on the least significant freq 
digit. So there's really no way to sit on the frequency.

I'm guessing this has to do with the way the PLL and VFO tuning interact.

Is it normal to hear such little blips? Or do I need to do some debugging?

Currently I get it at 7014.73 as I transition to .74.

Likewise at 7019.73-74, 7024.73-74 and 7029.73-74.

Interestingly I only hear it with my antenna attached and not when open or 
with a 50ohm dummy load.

Antenna/feedline: 88ft doublet @ 50ft elevation remoted 60ft from house. 
50ft of 450ohm windowline to SG211 at mounted directly below center point. 
60ft underground feed via RG213 from SG211 to K2.

73

jim ab3cv


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RE: [Elecraft] K2 Receive tuning blips

2007-01-23 Thread Don Wilhelm 
Jim,

Those are the 5 kHz transitions from the PLL.

First check the resistance across RFC15 on the bottom of the RF Board - it
should be quite low.  If it is open and you do not have an immediate
replacement, place a shorting jumper across it.

If RFC15 is OK and you still have the clicks, re-run CAL PLL.  Be certain
the bottom cover is in place when running CAL PLL.

73,
Don W3FPR

 -Original Message-

 As I tune the K2 across the band I get periodic little blips.
 They aren't
 birdies and they don't hinder reception. As I sit either side of the
 frequency where the blip occurred there is no apparent signal or
 interference. They actually tic the S-meter a few notches as
 well. The blip
 occurs when the display changes from 3-4 on the least significant freq
 digit. So there's really no way to sit on the frequency.

 I'm guessing this has to do with the way the PLL and VFO tuning interact.

 Is it normal to hear such little blips? Or do I need to do some debugging?

 Currently I get it at 7014.73 as I transition to .74.

 Likewise at 7019.73-74, 7024.73-74 and 7029.73-74.


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