[ARC5] Backwave

Kenneth G. Gordon kgordon2006 at frontier.com
Mon Oct 26 12:57:34 EDT 2015


I guess I'll have to review Rich's previous e-mails on this issue. 

In my experience, I have never seen or heard of an ARC-5 transmitter which 
exhibited backwave, whether the oscillator was running continuously or not. 

Therefore, I am having trouble understanding why he is getting this in his 
particular situation, especially at such unusually low voltages.

Again, in my experience, a major cause of backwave is lack of proper 
neutralization in the final(s). But the ARC-5 finals ARE neutralized.

Another possible cause of backwave is on-frequency parastics. And 1625s, 
unless properly "handled" can exhibit copious parasitics. I speak from 
experience with this.

But I am still somewhat mystified...

Ken W7EKB


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