Monitor discharge

[Asimov]

"Sam Goldwasser" bravely wrote to "All" (13 Dec 03 08:15:12)
--- on the heady topic of "Re: Monitor discharge"

SG> From: Sam Goldwasser <sam@saul.cis.upenn.edu>

SG> "Asimov" <Asimov@-removethis-bbs.juxtaposition.dynip.com> writes:

"Halfgaar" bravely wrote to "All" (11 Dec 03 19:51:03)
--- on the heady topic of "Re: Monitor discharge"

They should put an NE-2 neon bulb across the resistor to protect it from
the high voltage spike. Otherwise the resistor may eventually open up
and leave the crt undischarged i.e. a latent unknown shock hazard.

SG> An NE2 drops only about 60 V so you've reduced the 25,000 V to 24,940
SG> V. In other words, the resistor now does almost nothing at all which
SG> defeats its purpose. What you might want to do is put an NE2 in series
SG> with the resistor so you will see a flash as the HV discharges.

There's wisdom in that. I figured the NE2 discharge is self-limiting and
the resistor is there to finish the job below about 60V. It would still
flash but not for as long as if it were in series. Hey, wouldn't one be left
with 60 volts on the crt dag cap if in series?!

.... Just a little force field zap.

 

[red]

Just use straight wire and be done with it.


"Asimov" <Asimov@-removethis-bbs.juxtaposition.dynip.com> wrote in message
news:MSGID_1=3a167=2f133.0_3fde75ba@fidonet.org...

"Sam Goldwasser" bravely wrote to "All" (13 Dec 03 08:15:12)
--- on the heady topic of "Re: Monitor discharge"

SG> From: Sam Goldwasser <sam@saul.cis.upenn.edu

SG> "Asimov" <Asimov@-removethis-bbs.juxtaposition.dynip.com> writes:

"Halfgaar" bravely wrote to "All" (11 Dec 03 19:51:03)
--- on the heady topic of "Re: Monitor discharge"

They should put an NE-2 neon bulb across the resistor to protect it
from
the high voltage spike. Otherwise the resistor may eventually open up
and leave the crt undischarged i.e. a latent unknown shock hazard.

SG> An NE2 drops only about 60 V so you've reduced the 25,000 V to 24,940
SG> V. In other words, the resistor now does almost nothing at all which
SG> defeats its purpose. What you might want to do is put an NE2 in
series
SG> with the resistor so you will see a flash as the HV discharges.

There's wisdom in that. I figured the NE2 discharge is self-limiting and
the resistor is there to finish the job below about 60V. It would still
flash but not for as long as if it were in series. Hey, wouldn't one be
left
with 60 volts on the crt dag cap if in series?!

... Just a little force field zap.