Ah you were luckier than I. My Marconi TF1066/4 not only had a broken attenuator rack (from removing from cabinet without first turning it inward) but also a burned out 47 Ohm resistor at the probe.
It required complete removal of the probe assembly, including some gear work and springs and so on.
A lot of work but now the generator output is accurate and the attenuator works smoothly. The resistor is 1/4 Watt so it doesn't take much to burn it out. Maybe 5 Volts of rf for most of a minute. A 100 Watt transmitter delivers 71 Volts; that should do it in a second or less.
Bob
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--- On Tue, 12/25/12, Max Robinson <max@...> wrote:
From: Max Robinson <max@...>
Subject: [hp_agilent_equipment] 608 output attenuator.
To: hp_agilent_equipment@...
Date: Tuesday, December 25, 2012, 10:52 AM
You may remember that I was concerned
about the integrity of the output
attenuator in my 608D.? Today I checked it again the
way I had calibrated it
with a short cable and a pass through 50 ohm termination at
the scope end.
I set the frequency to 10 MHz and the attenuator to 100 mV
to be sure there
would be no proximity effect between the pickup coil and the
output tuned
circuit.? With the scope reading 100 mV within accuracy
spects I then
removed the termination and measured 200 mV within accuracy
spects.? From
this I conclude that my output attenuator has not been
damaged by someone
transmitting into it.
Regards.
Max.? K 4 O DS.
Email: max@...
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