Mark:
Yes, you're right; the 465 does have a 20 V/div max using 10:1 probes.
The lesson from you is essentially that when all else fails, read the
instructions. According to my probe manual, the probes are actually good to
500 V up to 10 MHz, then they derate to about 175 V at 30 MHz. They are
much more than adequate for observing the output of a full-featured K2.
Yes, I remember "hot carrier" FETs and the lethally high voltages required
to operate them.
73,
Steve
AA4AK
Sheesh...these young uns! 200V P-P should be no problem for a 'scope.
(If you look carefully, the probe is probably a 10:1 voltage divider.)
To show 200V p-p as a full scale deflection (assuming 10 divisions
vertically on the screen) would require 20v p-p per division. Just set
the vertical scaling at 20v p-p/div. If you're using official Tek
probes, you can ignore the 10:1 built into the probe because the scope
will compensate for it automatically. If the thing doesn't have
scalings up to 20v p-p you would need the high voltage probe set, but
I don't remember using them for normal (non broadcast) transmitter
service.
Shouldn't be a problem -- after there are those of us who used this
scope, (and its predecessors) to trouble shoot vacuum tube equipment.
(Remember vacuum tubes? sometimes known as 'thermionic FETs'? They
take high voltages!)
_______________________________________________
Elecraft mailing list
Post to: Elecraft@mailman.qth.net
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com
