Claimed OU circuit of Rosemary Ainslie

[poynt99]

Right, so it was partial blockage

Why the change to horizontal positioning?

Was the position "vertical" for the latest group of posted scope shots and data?

.99

[fuzzytomcat]

Right, so it was partial blockage

Why the change to horizontal positioning?

Was the position "vertical" for the latest group of scope shots and data?

.99

Yep it was partially blocked and didn't quite like the air movement through the pyrex glass causing a definite cooling effect ...... and measuring the outside only using a IR Thermometer and it was partially blocked anyway made a executive decision to change it and it does work much better using this method of temperature measurements. I will be testing it also this way for wattage measurement with a 24VCD power supply for the COP figures when it's time

Glen    

[poynt99]

A quick test on my setup has showed that partially blocking the upper end of the resistor caused the temperature at the hottest spot to rise about 2 degrees C.

.99

[fuzzytomcat]

A quick test on my setup has showed that partially blocking the upper end of the resistor caused the temperature at the hottest spot to rise about 2 degrees C.

.99

You might also notice that when "Horizontal" the mosfet end is warmer   

Fuzzy   

[poynt99]

Well,

Got some 450V spikes, using roughly the same period and PW as Fuzzy's, but it's not a great setting for my setup. The poor 555 draws excessive current and rises to 70 degrees C (it draws about 2.4W from its 12V supply). That's about what the resistor temperature got to as well. Power draw from the load's source was 9.5W. Source voltage feeding the load resistor was 17VDC.

The shunt wave form lost most of its spikyness, while the Drain wave form looked identical to Glen's.

.99