[Elecraft] K2 - KIO2 AUX I/O Install

[Don Wilhelm]

Damon,

 From your description of the 'pin counting', I wonder if you counted 
correctly - an integrated circuit is numbered counterclockwise around 
the chip starting with pin 1 which is identified with a dot or a bar or 
a tapered edge or some distinguishing characteristic. Pin 8 is on the 
same side of the IC as pin 1, but at the opposite end.
The voltage at U1 pin 8 should be the same as the voltage on the anode 
of D1. If these are both positive voltages, about the only thing that 
could cause a problem like that is if D2 and D3 are installed backwards 
- check the orientation.

73,
Don W3FPR

W4HDM wrote:
>
> Hi All,
>
> I just finished building and installing the KIO2 and AUX2 Mods and 
> while dong the testing on page 11 (second from the bottom) “… Connect 
> the (-) lead ….. positive to pin 8 of U1 on the KIO2 board. You should 
> see a negative reading of between -6 and – 12 VDC” I show positive 
> 5.02v and I am not sure how to proceed. I counted the pins from pin 
> one left to right top to bottom. Firmware ver. 2.04 & 1.09
>
> FYI this K2 was a K2/100 and the KIO2 was installed with the amp. So 
> the control board mod on page 10 was done when I received the rig. I 
> removed the amp and now use the K2 as QRP. I am installing a new KIO2 
> kit so that I can eventually install the amp in the EC2 or 100w Tuner 
> as well as have pc control capabilities.
>
> Any help is appreciated … Thanks!
>
> Damon-W4HDM-K2-#473
>
> * *
>
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