[Amps] Vacuum Relay

[Pete Smith N4ZR]

I could sure use asimple-minded explanation of how to connect my 
dual-trace scope in order to get a display of system timing.  The 
description below, while I'm sure it is correct, doesn't get this 
history major far enough.

73, Pete N4ZR
Check out the Reverse Beacon Network at
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On 12/13/2012 2:15 PM, Paul Christensen wrote:
>> A scope isn't going to tell all but it
>> tells a lot about a signal.  They're not difficult to use
>> and don't have to cost a lot.
>
> It doesn't take long to find some incredibly good buys on used 
> Tektronix scopes -- and at a price about half of the popular high-end 
> wattmeters. Folks have no problem paying $600 for a wattmeter with 
> unnecessary high accuracy, but seem to find no need for a scope.  Is 
> it the number of controls that's so intimidating?
>
> The dual trace function isn't required to determine if hot-switching 
> occurs, but is required to measure system timing. For station 
> monitoring here, the scope's Channel A is set to trigger on the 
> keyer's output while Channel B samples RF.  This setup makes it easy 
> to replicate the same CW waveform measurement as shown in the QST 
> Product Reviews.  By triggering the scope from the keyer, the waveform 
> stays in place for timing measurements without having to chase it with 
> the scope's variable time-base control.
>
> Paul, W9AC
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