[Elecraft] K1 Frequency Display Question

[Don Wilhelm]

Curt,

This is an Elecraft list, and all products are eligible for postings 
here - OK, the K3 is newer, thus more questions about it, and there are 
over 3000 of them out there in less than 2 years.  But -- there are also 
6600 or more K2s out there over the past 10 years, more than 3000 K1s 
and about 2000 KX1s since their introductions (my memory for the latest 
serial numbers may be a bit hazy, but hopefully you get the idea).  
While the K3 numbers may exceed the K2 in due time, there is still room 
for questions about the entire product line.

I am not certain about your particular question (I have not noticed that 
before), but the answer could be in the +/- 1 low order digit 
uncertainty of most digital displays.  If your actual frequency was just 
shy of 14060.1, that uncertainty region would extend from 14060.0 to 
14060.2.  Another possible explanation is that the gating time for the 
counter display is possibly to blame as well - since the counter gate is 
open for a fixed length of time and is not related to a zero crossing of 
the signal being counted,  sometimes the gate will line up with the 
voltage swings of the frequency being counted and other times it may 
gate with a part of a positive excursion at the start plus another at 
the end - the counter accumulates the number of  excursions of the 
waveform to determine the frequency.  Unlike the K2, the K1 dynamically 
counts the VFO and BFO to determine the frequency to display.

73,
Don W3FPR

rhulett1 at comcast.net wrote:
> I realize this is mainly a K3 list, but hope maybe another K1 owner has encountered and solved what seems rather strange behavior.  Since building the rig nearly 2 years ago, it has worked flawlessly with one exception.  Setting the VFO to a displayed frequency, the rig holds that frequency faithfully until I send a CW repeating message from one of the two memories.  When stop the message, the displayed frequency will show 0.2 kHz higher than before.  For example, 14mHz band, wih display showing 60.0, after sending a message the display will show 60.2  The actual frequency has not changed, as confirmed by listening with another receiver.
>   
>