[Milsurplus] Re: [ARC5] SCR-274N Makes It on ARRL.ORG

[Kenneth G. Gordon]

On 21 Jun 2006 at 12:54, MillerKE6F at aol.com wrote:

> .  In the context of the hey day of command set usage and the state of
>  the art of TVs during that period and the state of amateur radio
> prowess in  dealing with TVI, the command sets in general even when
> run somewhere near their  rated power were a grand source of TVI.

Not true: sorry. The ARC-5 equipment is exceptionally clean. Any 
TVI from them had other causes. I.e., mis-use and abuse, 21 Mhz 
TV set IFs, etc.

>  I
> have some completely stock  command set units that I'd be happy to
> power up under stock conditions and  measure the harmonic content and
> publish same in a few weeks as my curiosity has  become renewed on
> this parameter.  

Dave Stinson has already done much of this. Please see:

http://www.mines.uidaho.edu/~glowbugs/DaveStinsonARC5Info.pdf

and scroll down to "Harmonic Output and Why".

Makes interesting reading...

Ken Gordon W7EKB