Re: [Elecraft] K2 Kit Issue with tuning

[Don Wilhelm]

Don,

By "tuner" do you mean the VFO or do you have the antenna tuner installed?

73,
Don W3FPR

On 7/13/2018 7:20 PM, Don Schroder wrote:

Hi Don W

I’m not sure if I should post progress or regression! Yes, I had turned the tuner 
while measuring the voltage, it did not change the voltage. So I took it all apart 
again and went over the Panel & Control boards with a magnifier and pick. 
Didn’t even heat up the soldering iron, just examined.

Results? The tuner NOW moves the frequency, but not ALWAYS, just most of the 
time. Biggest problem now is, the tuner moves the frequency ONLY DOWN, even 
when turning it clockwise! (Which I assume should RAISE the frequency).

With sporadic tuning (most of the time down, sometimes no change), and only 
going down and rarely up, I wonder if this is a result of a loose component or 
loose pin? I think my next move will be to retouch pins with a hot iron, and 
see what change that brings.

Am I moving forward, or spinning my wheels?

Thanks for your input! It IS greatly appreciated!

Don, KE0PVQ

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Re: [Elecraft] K2 Kit Issue with tuning

[Don Schroder]

Hi Don W

I’m not sure if I should post progress or regression! Yes, I had turned the 
tuner while measuring the voltage, it did not change the voltage. So I took it 
all apart again and went over the Panel & Control boards with a magnifier and 
pick. Didn’t even heat up the soldering iron, just examined.

Results? The tuner NOW moves the frequency, but not ALWAYS, just most of the 
time. Biggest problem now is, the tuner moves the frequency ONLY DOWN, even 
when turning it clockwise! (Which I assume should RAISE the frequency).

With sporadic tuning (most of the time down, sometimes no change), and only 
going down and rarely up, I wonder if this is a result of a loose component or 
loose pin? I think my next move will be to retouch pins with a hot iron, and 
see what change that brings.

Am I moving forward, or spinning my wheels?

Thanks for your input! It IS greatly appreciated!

Don, KE0PVQ

Sent from Mail for Windows 10

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Re: [Elecraft] K2 Kit Issue with tuning

[Don Wilhelm]

Don,

The most likely cause of that behavior is because the encoder board is 
making contact with the Control Board.
Flush trim (diagonal cutters will not suffice) the leads on the encoder 
board and also the area of the Control Board which possibly could 
contact it.  If you do not have flush cutters, you can find inexpensive 
ones in the tool section of your local Home Depot store.  Look for 
Lufkin or Xcelite or Cooper (all the same company) "shear" cutters - 
they are inexpensive and will do a good job.


As added insurance, you can place a piece of card stock (a business 
card) or better yet Fish Paper or a flat piece of thin plastic like that 
used for the shrink wrap on purchased small items between the encoder 
board and the back of the control board.


73,
Don W3FPR

On 7/12/2018 3:22 PM, Don Schroder wrote:

Hi all,

I am very happy with my K2 kit. I am taking my time and being very careful NOT to 
have any solder bridges. So I was disappointed & depressed when I discovered 
the tuning knob does NOT advance or reduce frequency, it just stays on the 
beginning band frequency when the knob is spun.

I also noticed the menu button, when pressed multiple times, does NOT advance 
to the next menu item, going in either direction. Related issue?

So, if anyone has suggestions on where to look or start looking, I would very 
much appreciate any ideas. All resistances checked out ok, too.


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[Elecraft] K2 Kit Issue with tuning

[Don Schroder]

Hi all,

I am very happy with my K2 kit. I am taking my time and being very careful NOT 
to have any solder bridges. So I was disappointed & depressed when I discovered 
the tuning knob does NOT advance or reduce frequency, it just stays on the 
beginning band frequency when the knob is spun.

I also noticed the menu button, when pressed multiple times, does NOT advance 
to the next menu item, going in either direction. Related issue?

So, if anyone has suggestions on where to look or start looking, I would very 
much appreciate any ideas. All resistances checked out ok, too.

Many thanks!
Don, KE0PVQ

p.s. I want to learn about vanity call signs, why would I want one? What do 
they represent? How do you pick one? Yep, I’m a new-bee, but an old fart at 75!

Sent from Mail for Windows 10

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