>
>measures wrote:
>> The negative end of the capacitor stack is limited to a couple of volts
>> above gnd potential due to use of glitch diodes in the metering
>> circuitry. The logical place for a glitch resistor is in the positive > HV
>lead.
>
>Presumably there are two possible places to insert the resistor: in the
>HT a.c. lead right out of the transformer, thus protecting everything
>including the bridge rectifier and caps,
The thing that needs to be limited is the peak discharge current from
the filter caps.
>or immediately before the anode
>of the tube, thus protecting only the tube (and maybe not the meters)?
>
agreed. the glitch diodes protect the meters. A glitch R in the B+ lead
protects the tube.
cheers, Ian
- Rich..., 805.386.3734, www.vcnet.com/measures.
end
--
FAQ on WWW: http://www.contesting.com/FAQ/amps
Submissions: amps@contesting.com
Administrative requests: amps-REQUEST@contesting.com
Problems: owner-amps@contesting.com
|