[ARC5] QST articles.

Kenneth G. Gordon kgordon2006 at verizon.net
Sun Dec 14 20:10:05 EST 2008


On 14 Dec 2008 at 16:33, Bob Macklin wrote:

> There is NO HARMONIC suppression built into ARC-5 transmitters!

OK. You're probably right. You obviously know far more 
than I do about the subject.

However, if you read the links I gave you to David Stinson's 
notes on measuring harmonic rejection in the ARC-5s, you 
might come to a different conclusion.

Maybe I am misinterpreting his data, but I don't think so.

In any case, by reducing the loading coil to zero and 
maxing out the link coupling, you would, automatically, be 
reducing any harmonic suppression there MIGHT be there 
to zero.

It has always been my contention that the more of the right 
"stuff" you can put between the harmonic generator and the 
antenna, the fewer the harmonics radiated. 

Remove all that, and the result is more harmonics.

Make sense? It does to me.

But what do I know? 

Nothing... 

Quite obviously...

Ken Gordon W7EKB


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