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@arrl.net>
To: <amps@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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