[Amps] Vacuum Relay

[Carl]

Agree.

With a 100 MHz Tek 465 analog scope now under $100 with at least one probe 
its a shame not to have one on hand for all sorts of uses.
You also get more triggering and display combinations than the more basic 
variety.

Carl
KM1H


----- Original Message ----- 
From: "Paul Christensen" <w9ac at arrl.net>
To: <amps at contesting.com>
Sent: Thursday, December 13, 2012 2:15 PM
Subject: Re: [Amps] Vacuum Relay


>> 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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