Hi there,
I am planning on getting a high-voltage probe for use with a multimeter.
I have absolutely no idea how much I should be spending to get something half decent that will not blow my face.
Is there a particularly popular product at the moment that I should be aware of ? Brand/model ?
Spec wise, I need something that's designed to work with the usual 10Mohm input impedance of most DMM.
Rating : I want to buy it mostly to be able to work on old instruments that use CRT's (mostly my "collection" of old scopes, to start with) That is, small tubes, not big television sets.
My immediate need is for a Tek 317 scope which uses a HV of 7.7kV (tiny 3inch tube) My Tek 2232 scope uses 12kV for its CRT so I would need to be able to measure at least this. My other scopes I have no idea, but I guess/understand that the voltage is closely related to the size/diagonal of the tube, right ? So if guess a 15kV probe would cover most CRT instruments I might come across. 20kV would put me even more on the safe side.
Are there standardized voltage ratings, like 10kV, 15kV, 20kV. or does each manufacturer come up with pretty much anything and everything, depending on mood ?
I am looking at spending no more than 100 bucks grand maximum, for a 20kV probe. If limited to 15kV then hopefully less than this...
Is this realistic or should I be better off buying a used old one on Ebay ? If so, any particular brand or model worth searching for ?
Thanks in advance for your good advice if you know the subject with up to date information...
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Vince