Re: Testing a 2-01C Diode
|
With my 410B I routinely measure the output of my TL922 through the HF range at something over 200 V rms but the current through the diode is limited by its load.? The input signal is coupled via a 2 pF capacitor I think which is just the tube fixture.
It's a half wave rectifier and the meter reads the capacitor charge.? So if you don't change the circuit it should be able to be tested.? But recheck the assembly of the probe from the tip to the tube to make sure there is coupling.? And verify that there is a dc path.
Bob
On Saturday, July 27, 2019, 10:37:59 AM PDT, Chuck Harris <cfharris@...> wrote:
Well, it is just a diode.
Take a 9V battery, a resistor as a load, and your DVM,
and try the battery this way, and then that way, and if the
current isn't there in one direction, but is in the other
direction, it is probably good.
The specs are available on the web, so you should be able to
pick your load resistor to match the typical current as specified
in the data sheet.
Or, you could? put it on a curve tracer...
-Chuck
n4buq wrote:
> Still working on the recently-acquired 11036A which isn't working.? I've checked the probe wiring and don't see anything amiss.? When it powers up, the tube gets hot so the heater is evidently working; however, I get no signals back to the meter.
>
> Since I have another probe (this one uses the EA53), I tried that with the meter and it works fine so the problem has to be somewhere in the probe and I'm beginning to wonder if it isn't the tube but am curious as to how that might be considering the heater works (which, I presume, is the primary failure point with these).
>
> Before I go spending money on a rather expensive tube, is there simple way I can test this one out of the probe?? If I supply heater voltage (via an auxiliary power supply), can I place the diode across the signal source and expect to see half-wave rectification?? If I do this, should precautions be made to limit the current through the tube and, if so, how much current is safe?? Unless I'm misreading/misunderstanding the specs, the tube is only rated at 1mA DC which seems quite small but, again, I might be misunderstanding that rating.
>
> BTW, I'm supplying the AC signal with an HP 3310B function generator.
>
> Thanks,
> Barry - N4BUQ
>
>
>
>
>
|
