[Elecraft] K2 Front Panel Board - Resistance Measurements ??

Wed Jan 1 20:28:00 2003

Hi Dean,

Pin 3 is a ground pin just like 18 and 20, so this has to be zero ohms.
This is a good place to start looking since the test condition is the
simplest.  Double check the solder joints on the wire you're using for the
ground connection for your meter.  Sometimes the solder will appear to
surround the wire or terminal but it doesn't actually make contact due to
some slight film on the wire. It takes extra heat and maybe a little rubbing
with the soldering iron tip to thoroughly heat the wire and make the solder
wet it for a good contact.

For a little different test, measure the resistance between J1 pins 1 and 2.
This is the AF Gain pot. As you turn the pot, this resistance should change.
Likewise, the resistance from pin 19 to ground should change as you turn the
RF Gain pot.

73/ Bob - AG5Q

----- Original Message -----
From: "Dean Maples" <[email protected]>
To: <[email protected]>
Sent: Wednesday, January 01, 2003 6:01 PM
Subject: [Elecraft] K2 Front Panel Board - Resistance Measurements ??

> Happy New Year All.
>
> Just completed the the front panel board on K2 SN 3043. I made the
> resistance measurements at the end of the build cycle and only had 2
> measurements display the correct values on J1. On J1 pins 8 & 20 were okay
> (zero ohms). Everything else was infinite. I inserted the male plug into
J1
> thinking I didn't have a good connection with the pins on J1  - no
> difference. All the U1 measurements were okay. I reheated all the J1
> connections, inspected all the switches, pots, chips, etc. but really
> couldn't find any issues (I have glaucoma and very big magnifying glass -
so
> this small work is a real challenge!).
>
> Any ideas on how to proceed?
>
> 73's & HNY,
> Dean, K9FTB
>
>
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