[Elecraft] AF1 - couple of questions

[WA6OCP]

Dave,

I have had no problems using 12V while leaving the 9V battery installed.

Although I don't use mine to drive an external speaker directly, I just
tried it using the 9V battery, and an old computer speaker, and it worked
fine.  The errata changes were made so that the left and right channels
would be commoned.  I have had some 1/8" plugs and jacks that have had some
inherent problems.  You might want to check for continuity and/or shorts.

Neal WA6OCP


David Wilburn wrote:
> 
> 
> ......  Questions;
> 
> 1. - I am currently running the AF1 with a 9v battery, but I will be 
> connecting it to 12v supply here in the shack.  I was going to leave 
> the 9v battery installed, as it appears the diodes that are part of 
> the circuit will protect it.  But wanted to confirm.  
> 
> 2 - I performed the circuit changes documented in the errata, and the 
> AF1 works fine with headphones (stereo jacks), but it does not seem to 
> work with any of my external speakers.  Did I loose that option when I 
> made the changes in the errata?  They seemed to be required for it to 
> work with headphones.
> 
> Dave Wilburn
> K4DGW
> K2/100 - S/N 5982
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