[Amps] Breakdown tester, RM 215 L2

[Vic Rosenthal K2VCO]

Keep in mind that this kind of device probably has a very high series 
resistance built into it, so that the loading of your meter might be 
enough to drop the voltage significantly.

On 2/15/2014 8:29 AM, Denis Jackson wrote:
> I bought this years ago, and have recently been using it to check components
> for my new amplifier project.  It's branded 'Avo' but I believe they were
> sold under a number of other brands too.
>
>
>
> Unfortunately, it now seems to have developed a fault, and I don't think
> it's generating any HV at all now, on either AC or DC.  I wound the voltage
> right down, using the front panel control, connected my (1000 V max) test
> meter to the HV probe and earth, and whilst I do get a reading, it rose to
> no more than 250V, with the voltage control subsequently turned to maximum,
> which should be producing 12kV DC.
>
>
>
> Does anyone have a circuit diagram or manual for this that they would be
> prepared to scan for me?  If anyone knows this piece of kit and has any
> ideas as to where I might start working out what's wrong with it, that would
> be useful too.  I don't have anything to measure the HV directly, but I have
> measured the resistance of the secondary winding. There are two taps, 4kV
> and 6kV.  Measuring from 0V (which appears to be above chassis ground), I
> have 43k ohms to the 4kV tap, and 60k ohms to the 6kv tap.  This seems very
> high to me, but perhaps not, given the ultra-low current that this device
> produces?  You will gather, I have no experience of such equipment.
>
>
>
> Suggestions or advice much appreciated.
>
>
>
> 73
>
>
>
> Denis MW0CBC / GW8OQV
>
>
>
>
>
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-- 
73,

Vic, K2VCO

Fresno CA

http://www.qsl.net/k2vco/