Crystal Cell Research for Experimenter

[tgraca]

I need to learn how to build those JT's like you do. Fausto.

Do you have a soldering iron and some solder? You can get these and everything else you need on eBay for cheap. Get a resistor collection (500+<$5), some 100 uf electrolytic caps (100<$10), an assortment of inductors (100<$5), some transistors (2n2222's are about $2 per 100), and some bread boards (about $3 per 10, which you can cut into 4 - 1 will give you 4 of these JT's)... Let me know if you need any help. -teo

[tgraca]

It's up again this morning to 851 mV.

830 mV this afternoon... under load...

[plengo]

Do you have a soldering iron and some solder? You can get these and everything else you need on eBay for cheap. Get a resistor collection (500+<$5), some 100 uf electrolytic caps (100<$10), an assortment of inductors (100<$5), some transistors (2n2222's are about $2 per 100), and some bread boards (about $3 per 10, which you can cut into 4 - 1 will give you 4 of these JT's)... Let me know if you need any help. -teo

I have all that, but when I want to create a JT for the cell I have no idea how to change the values. I can build one based on your design you posted but changing is the difficult thing.


Fausto.

[plengo]

Today - 1101 mV under load.

Did she go UP???  What is the current please? Cell 344?



Fausto.

[tgraca]

I have all that, but when I want to create a JT for the cell I have no idea how to change the values. I can build one based on your design you posted but changing is the difficult thing. Fausto.

Any values will work to some extent... for higher powered cells, use about a 10/1 for the inductors - base/collector - same basic design. For low powered cells, like 1/2 mA, use 2/1 or 1/1, but use higher inductance, like my 10 mH/10 mH config. I like the 100 uF caps for this because they work well with the blinker configurations I build (which requires another polarized cap across the inputs, like the one I sent you), but you can use smaller capacitance too, like 10 uF, 1 uF, 0.1 uF, etc., and they don't have to be polarized caps. Get a little breadboard and experiment with the values, then when you find something that works best, solder it together.

I am currently out of the inductors I was using for my regular configuration, so I will build them with different values - for a 2 mA - 4 mA draw, I like 4/1, so I may do something like 1 mH and 220 uH... I have a bunch of 100 mH's and 10 mH's too I might play with for the next batch. I have a crapload of hand wound bifilars I use for testing, but at this point, I am just plugging and playing with these little ones. There is a advantage to using bifilars or hand wound coils, but only for larger loads. It's too bad too... I have 3,000+ feet of 30 AWG wire sitting here along with a bunch of cores waiting for me to begin winding again! lol - I love winding my own coils!