Help needed with high voltage PSU - UK Vintage Radio Repair and Restoration Discussion Forum

mikelect · 4th Dec 2006, 12:58 am

Hi guys does anyone have a circuit for a high voltage PSU of the type used for igniting gas appliances at about 10kv

Mike

Mike Phelan · 4th Dec 2006, 9:27 am

Mike

Someone will probably come up with one, but I did make an electric fencer for a farmer once that used an ignition coil and two 2N3055s as a multivibrator. Killed radios from half a mile away!

Our cooker hob is fed from mains and emits sparks (at a guess about 10kV) about 5Hz intervals.

My Coleman Northstar petrol lantern seems to give about the same output and runs from a single AA.

Don't know if this is of use, or whether you would prefer making one?

Merlin · 4th Dec 2006, 11:38 am

Quote:

Originally Posted by Mike Phelan

Mike

Someone will probably come up with one, but I did make an electric fencer for a farmer once that used an ignition coil and two 2N3055s as a multivibrator. Killed radios from half a mile away!

I wonder if you could build a portable one to kill peoples' mobile phones when they're playing their crappy music with them on the train every damn morning!? Oh for an EMP gun!

boiss · 4th Dec 2006, 1:25 pm

What do you want the 10KV for?
As for the "noise" from walkmen and the like, I've always thought about making some sort of zapper.
Mike.

mikelect · 4th Dec 2006, 1:52 pm

Hi guys thanks for the replies so far. the 10kv is to ignite a gas burner on a kiln I'm building in another life, I'm not really bothered if I build one or buy one as long as it produces the required effect

Mike

6AL5W-Martin · 4th Dec 2006, 2:36 pm

i have one ac transformer what delivers more then 7kV.
Simply to feed with 230v..
If you like to get it, postage only

Kat Manton · 4th Dec 2006, 4:29 pm

Hi Mike,

Ask around a few firms who deal with oil-fired central heating systems; an oil-burner ignition transformer might be a simple solution.

Cheers, Kat

joe · 4th Dec 2006, 6:17 pm

Hi Mike

I've attached a sketch of the igniter in our MFI hob. It produces one spark per press of the button. I don't have any transformer details but I'm sure it can't be too critical.

I'd guess a turns ratio of 50:1. as long as its well insulated. The MFI unit is very small, about 2x2x1 in.

Joe

ppppenguin · 4th Dec 2006, 6:31 pm

An old car ignition coil seems like a good place to start for a DIY job. Or a flyback tranny from an old PC monitor.

I wonder if the units used in gas cookers are cheaply available as spares.

Manually operated piezo igniters are quite common. There are several varieties here: http://www.bes.ltd.uk/nav_graf/frame...oducts/010.asp

Station X · 4th Dec 2006, 6:47 pm

An ignition coil feeding a standard spark plug is perfectly good for igniting gas. The spark plug will withstand the heat too. A push switch or sprung toggle switch to replace the points of the standard ignition circuit works fine, with the spark being generated when the switch is released.

4th Dec 2006, 12:58 am	#1
mikelect Retired Dormant Member Join Date: Sep 2003 Location: Wrexham, North Wales, UK. Posts: 799	Help needed with high voltage PSU Hi guys does anyone have a circuit for a high voltage PSU of the type used for igniting gas appliances at about 10kv Mike

4th Dec 2006, 9:27 am	#2
Mike Phelan Dekatron Join Date: Nov 2003 Location: Near Leeds, West Yorkshire, UK Posts: 4,609	Re: Help needed with high voltage PSU Mike Someone will probably come up with one, but I did make an electric fencer for a farmer once that used an ignition coil and two 2N3055s as a multivibrator. Killed radios from half a mile away! Our cooker hob is fed from mains and emits sparks (at a guess about 10kV) about 5Hz intervals. My Coleman Northstar petrol lantern seems to give about the same output and runs from a single AA. Don't know if this is of use, or whether you would prefer making one? __________________ Mike.

4th Dec 2006, 1:25 pm	#4
boiss Pentode Join Date: Jun 2006 Location: Malaga, Spain. Posts: 235	Re: Help needed with high voltage PSU What do you want the 10KV for? As for the "noise" from walkmen and the like, I've always thought about making some sort of zapper. Mike.

4th Dec 2006, 1:52 pm	#5
mikelect Retired Dormant Member Join Date: Sep 2003 Location: Wrexham, North Wales, UK. Posts: 799	Re: Help needed with high voltage PSU Hi guys thanks for the replies so far. the 10kv is to ignite a gas burner on a kiln I'm building in another life, I'm not really bothered if I build one or buy one as long as it produces the required effect Mike

4th Dec 2006, 2:36 pm	#6
6AL5W-Martin Hexode Join Date: Nov 2006 Location: Biedenkopf, [Hessen], Germany. Posts: 425	Re: Help needed with high voltage PSU i have one ac transformer what delivers more then 7kV. Simply to feed with 230v.. If you like to get it, postage only

4th Dec 2006, 4:29 pm	#7
Kat Manton Retired Dormant Member Join Date: Jul 2005 Location: West Yorkshire, UK. Posts: 1,700	Re: Help needed with high voltage PSU Hi Mike, Ask around a few firms who deal with oil-fired central heating systems; an oil-burner ignition transformer might be a simple solution. Cheers, Kat

4th Dec 2006, 6:17 pm	#8
joe Rest in Peace Join Date: Apr 2003 Location: Edgware, North London. Posts: 307	Re: Help needed with high voltage PSU Hi Mike I've attached a sketch of the igniter in our MFI hob. It produces one spark per press of the button. I don't have any transformer details but I'm sure it can't be too critical. I'd guess a turns ratio of 50:1. as long as its well insulated. The MFI unit is very small, about 2x2x1 in. Joe Attached Thumbnails

4th Dec 2006, 6:31 pm	#9
ppppenguin Retired Dormant Member Join Date: Dec 2003 Location: North London, UK. Posts: 6,168	Re: Help needed with high voltage PSU An old car ignition coil seems like a good place to start for a DIY job. Or a flyback tranny from an old PC monitor. I wonder if the units used in gas cookers are cheaply available as spares. Manually operated piezo igniters are quite common. There are several varieties here: http://www.bes.ltd.uk/nav_graf/frame...oducts/010.asp

4th Dec 2006, 6:47 pm	#10
Station X Moderator Join Date: Jan 2003 Location: Ipswich, Suffolk, IP4, UK. Posts: 21,288	Re: Help needed with high voltage PSU An ignition coil feeding a standard spark plug is perfectly good for igniting gas. The spark plug will withstand the heat too. A push switch or sprung toggle switch to replace the points of the standard ignition circuit works fine, with the spark being generated when the switch is released. __________________ Graham. Forum Moderator Reach for your meter before you reach for your soldering iron.