Search found 124 matches

by AllenWallace
Thu May 08, 2003 4:26 am
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: glassman hv supply
Replies: 41
Views: 16487

Re: glassman hv supply

<t>YES! you can use a positive power supply. You want to make a <br/> single stage marx generator, which will convert a positive DC voltage <br/> into negitive pulses. Also, look at Richard Hester's post "Pulsed Fusor <br/> Schemes" in the Files section of this forum. You can subsitute a spark <br/>...
by AllenWallace
Mon Apr 28, 2003 5:09 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Background counts
Replies: 14
Views: 3233

Re: Background counts

<t>When reporting the background rates, please also specify your elevation above sea level. I live at 4700 feet and I know that the I expect to see more cosmic rays than someone near sea level.<br/> <br/> Also, please report the error tolerance of your measurements. <br/> <br/> To do this, simply ca...
by AllenWallace
Fri Mar 28, 2003 5:47 am
Forum: Vacuum Technology (& FAQs)
Topic: Vac pump advice
Replies: 6
Views: 3004

Re: Vac pump advice

We bought our vac pump oil at the local farmers coop. It seems that
milking machines use vacuum pumps. I don't really know the
viscosity... As I recall, It didn't seem that the price was excessive.
by AllenWallace
Wed Mar 26, 2003 3:44 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Units of energy
Replies: 4
Views: 1823

Re: Units of energy

It is always interesting to realize just how little energy is contained in an Electron volt. As for the health effects, remember Am-241 is also a gamma emitter and can cause cellular damage.
by AllenWallace
Tue Mar 25, 2003 1:24 am
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: nst demo supply
Replies: 5
Views: 2897

Re: nst demo supply

<t>A single NST transformer with make a very nice demo supply. We first <br/> used only 1/2 of the transformer (half wave rectified). We used two <br/> microwave oven diodes in series. Later on, we used both sides of the <br/> transformer, however, there was not much difference in the visual <br/> o...
by AllenWallace
Thu Mar 13, 2003 2:27 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Sealing sources
Replies: 8
Views: 3238

Re: Sealing sources

<t>I would not bother with storing the ore samples in lead. The real health <br/> risk is the radon. Sealing the samples in exoxy would prevent the <br/> radon from leaking. You might consider using clear acrylic paint, <br/> although some ore samples are very crumbly. Myself, I'd store the <br/> sa...
by AllenWallace
Tue Mar 11, 2003 6:46 pm
Forum: Vacuum Technology (& FAQs)
Topic: Turbo Pump Up And Running
Replies: 7
Views: 3409

Re: Turbo Pump Up And Running

Hey its better than buying a hole new pump and controler.. Right.
by AllenWallace
Tue Mar 11, 2003 4:43 am
Forum: Vacuum Technology (& FAQs)
Topic: Turbo Pump Up And Running
Replies: 7
Views: 3409

Re: Turbo Pump Up And Running

Why was it in the shop and How much was the bill!
Just wondering Because our controler is on strike.
by AllenWallace
Wed Mar 05, 2003 1:04 am
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: PCB's
Replies: 5
Views: 2511

Re: PCB's

Well Its an old x-ray unit
and also the oil smells scorched .
for all we know we could or we not have a pcb oil. I belive someone was talking about pcb oil smelling scorched and to the referenced date on the unit, it puts the unit in the pcb useage time-frame.
by AllenWallace
Tue Mar 04, 2003 9:11 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: PCB's
Replies: 5
Views: 2511

PCB's

What is the best way to get rid of PCB transformer oil.
I have an old x-ray transformer 65kv @ 1 or 2 amps and we think that its oil is PCB based.