[Hammarlund] Re: Sweep Method for Alignment - ringing.

[Kenneth G. Gordon]

On 9 Apr 2006 at 21:03, Edward B Richards wrote:

> All of the bandwidth measurements I have seen are at 6 dB down, the
> half way point.
> 
> 73, Ed Richards K6UUZ
> Simi Valley, Ca 93065
> Home of the Air Force 1 pavilion

You're right, of course. The 3db point is a power measurement, while 
the 6db point is a voltage measurement, as I was reminded by Larry, 
W1GOR.

In my last post on this subject, when I said that Julian could use his 
scope's vertical voltage indication to calculate those 3db power points, I 
should have been clearer. 3db power corresponds essentially exactly in 
this case with 6db voltage, so on the scope screen they are identical.

Thank you both for the correction.

Sometimes we use those two as identities, whereas they aren't, really.

Ken Gordon W7EKB