Rosemary Ainslie circuit demonstration on Saturday March 12th 2011

[Rosemary Ainslie]

The quantity of the water that I cooked last night is exactly 0.7 of a litre by the way.  I've just measured it.  The plastic inside lining is buckled somewhat but no leakage.  I think that vacuum lining is still in tact.

Also for those who are looking for the information - the resistor element is an INCOLOY alloy heating rod element threaded with nichrome resistive wire.  Resistance is 11.11 Ohm.  L = 2.23micro Henries.  200 watts.  But don't get married to these specs.  Frankly - if I had my 'druthers' I'd have chosen one of those pancake type elements that one gets from electric stoves.  There's something about that shape that I think may help things along.  Anyway.  Small is good.  And I'd be very interested to see what happens on smaller batteries.

Regards,
Rosemary

[poynt99]

A Sincere WARNING!

I would advise anyone wanting to replicate this oscillator, you do so without the use of an expensive, prized or valuable (to you) function generator. With the generator connected to a MOSFET Source pin, there is the real potential for high currents to pass through it, and these may cause permanent damage to the function generator. (I think we have already seen the results of this potential issue with the previous function generator used.)

There is a much better way to use this circuit without the potential danger for damage to your function generator, and I have shown that method in a previous post. Please ask if you want more information on this.

Regards,
.99

[i_ron]

They have them at Newark..  I get stuff from them all the time.
http://www.newark.com/jsp/search/productdetail.jsp?id=06F7972


Mags

"Availability
Availability: N/A
No Longer Available
Price For: 1 Each
Minimum Order Quantity: 500
Order Multiple Quantity: 500
Price: N/A"

Ron

[poynt99]

Possible sources for purchasing the IRFPG50:

http://www.questcomp.com/QuestDetailsAll.aspx?pn=IRFPG50&pnid=91660&stock=YesOnly

http://www.ibselectronics.com/search_r.asp?mfgpn=IRFPG50

http://export.farnell.com/_/dp/1704010

.99

[i_ron]

Possible sources for purchasing the IRFPG50:

http://www.questcomp.com/QuestDetailsAll.aspx?pn=IRFPG50&pnid=91660&stock=YesOnly

http://www.ibselectronics.com/search_r.asp?mfgpn=IRFPG50

http://export.farnell.com/_/dp/1704010

.99

.99

Good find!

On the heating element issue, I see there was quite a discussion on the other forum... did anyone consider that it was a DC motor home or live stock
water heater? At 11 ohms and 200 watts that works out nicely to being a 48 volt element. Just a thought.

Ron