Maker Pro
Maker Pro

CRT size vs anode voltage?

M

mike

Jan 1, 1970
0
I need a 10-15KV supply for an electronic air filter.
Thought I'd pick up a free CRT TV and take the anode supply
out.
What's a typical relationship between CRT size and anode voltage?

Alternative sources for free HV supplies at near zero current would
also be helpful. I was surprised I found nothing on ebay.

Thanks, mike
 
P

Phil Allison

Jan 1, 1970
0
"mike"
I need a 10-15KV supply for an electronic air filter.
Thought I'd pick up a free CRT TV and take the anode supply
out.


** Have you any idea how a CRT TV even works?

Horizontal deflection and EHT are derived from the same circuit.

Some smaller sets use the PSU as a source for both the above.

Removing the EHT supply is simply not possible.

BTW:

Colour sets have mostly 20kV to 26kV on the tube.

Small B&W sets might be closer to your range.



.... Phil
 
M

mike

Jan 1, 1970
0
"mike"



** Have you any idea how a CRT TV even works?

Yes, I do, thanks for asking.
Horizontal deflection and EHT are derived from the same circuit.

So? I didn't ask for a lesson in TV operation.
I asked for advice on how big a TV to get for 10-15KV.
Some smaller sets use the PSU as a source for both the above.

Removing the EHT supply is simply not possible.

Methinks you need to be more creative. I'm CERTAIN that I
can saw off the portion of the board containing the flyback transformer
and associated parts to build the supply I need.
I'd just like to start with a transformer/voltage multiplier designed
for the range of voltage I need.
BTW:

Colour sets have mostly 20kV to 26kV on the tube.

Small B&W sets might be closer to your range.

Yes, I know smaller sets might be closer.
Just would like to have some idea of how much smaller.
I've already got 5KV supplies. I don't need to acquire
any more free E-waste than necessary.

Thought some TV repair guy might have a rule of thumb on
the tip of his tongue.

I'm still optimistic that someone with more interest in
answering the question than denigrating the questioner
might show up.
 
P

Phil Allison

Jan 1, 1970
0
"mike = SHITHEAD"

Yes, I do, thanks for asking.


** Blatant lie.



** Try reading the whole post before making and ASS of yourself.

FUCKHEAD !!

I didn't ask for a lesson in TV operation.


** But you desperately NEED one - FUCKHEAD !!

Methinks you need to be more creative.


** Me thinks, you need, to go get FUCKED.

I'm CERTAIN that I
can saw off the portion of the board containing the flyback transformer
and associated parts to build the supply I need.

** You are not certain if your fat ARSE is on fire.

FUCKHEAD !!!

Yes, I know smaller sets might be closer.


** Read what I actually wrote - FUCKHEAD !!!

I'm still optimistic ...


** You are lucky to be alive.

You shit for brains, stinking ignorant pig.
 
M

mike

Jan 1, 1970
0
On 2/24/2012 8:01 PM, Phil Allison wrote:
snip
Take your meds!
 
J

John Smith

Jan 1, 1970
0
mike said:
I need a 10-15KV supply for an electronic air filter.
Thought I'd pick up a free CRT TV and take the anode supply
out.
What's a typical relationship between CRT size and anode voltage?

There isn't one.
Alternative sources for free HV supplies at near zero current would
also be helpful.

Dunno about free but google cockcroft-walton voltage multiplier.

Don't forget the megohms series resistor.

old guy
 
P

Phil Allison

Jan 1, 1970
0
"mike = TROLL "


** Eat a box of rat bait - fuckhead.
 
G

gregz

Jan 1, 1970
0
mike said:
I need a 10-15KV supply for an electronic air filter.
Thought I'd pick up a free CRT TV and take the anode supply
out.
What's a typical relationship between CRT size and anode voltage?

Alternative sources for free HV supplies at near zero current would
also be helpful. I was surprised I found nothing on ebay.

Thanks, mike

That seems too high for a typical plate cleaner. 10 kv will arc at about 1
cm.
5kv seems more reasonable. It's usually easier to find positive supplies.
Is it an ion type cleaner ? I use these for low current.

http://www.goldmine-elec-products.com/prodinfo.asp?number=g1783
 
J

JW

Jan 1, 1970
0
I need a 10-15KV supply for an electronic air filter.
Thought I'd pick up a free CRT TV and take the anode supply
out.
What's a typical relationship between CRT size and anode voltage?

Alternative sources for free HV supplies at near zero current would
also be helpful. I was surprised I found nothing on ebay.

How about using an oil burner transformer? IIRC they're about 10KV or
so...
 
A

Archon

Jan 1, 1970
0
I need a 10-15KV supply for an electronic air filter.
Thought I'd pick up a free CRT TV and take the anode supply
out.
What's a typical relationship between CRT size and anode voltage?

Alternative sources for free HV supplies at near zero current would
also be helpful. I was surprised I found nothing on ebay.

Thanks, mike
You might want to look at a scope chassis from something like the Tek
2213A/2215A. The power supply and EHT circuit is very simple and could
easily be isolated, its about 14KV. You could probably saw out the power
section.
JC
 
W

Winston

Jan 1, 1970
0
JW said:
How about using an oil burner transformer? IIRC they're about 10KV or
so...

23 mA is a *lot* of current for this application.
A dangerous lot of current.

--Winston
 
J

josephkk

Jan 1, 1970
0
23 mA is a *lot* of current for this application.
A dangerous lot of current.

--Winston

I dare say. That is in the power range of dental x-ray machines.

?-)
 
Top