Neon bulbs light in the presence of RF -- even if both leads are busted
off. Neon bulbs are especially useful for checking for the presence
VHF parasites because at VHF they have a purplish color and at HF they
are more orangish. .
On Jan 2, 2006, at 11:05 AM, HAROLD B MANDEL wrote:
> Dear Jason,
>
> Most neon lamps require some sort of series resistor to limit the
> current after ignition. Fair Radio has some very neat pilot lamps
> you add neon bulbs to and also add correct value series resistors
> to.
>
> Do you want the lamp to indicate when it is energized by the DC
> secondary of the Anode Supply or when the transformer primary
> is energized?
>
> Using any sort of indicator in the DC output line is a no-no, and I
> hope
> you mean monitoring the transformer primary.
>
> You might even use two 120-vac pilots to monitor each side of the
> 240 vac line with respect to Neutral.
>
> Hal
> W4HBM
>
>
> On Mon, 2 Jan 2006 12:31:04 -0600 "Dugas, Jason A. (JSC-EP)"
> <jason.a.dugas@nasa.gov> writes:
>> I'm looking for a 240Vac neon lamp for use as a high voltage
>> indicator on an anode power supply I'm building.
>>
>> I'd prefer one that ran directly off of 240Vac line voltage in order
>> to avoid added components & complexity.
>>
>> Thanks,
>>
>> Jason
>> KB5URQ
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>
>
Richard L. Measures, AG6K, 805.386.3734. www.somis.org
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