MightyOhm.com

Hi everyone Some of the emergency radios being offered currently seem to be pretty poor as far as goes their radio receiving function, judging from online reviews. This is all the more problematic because many of these radios, without necessarily being advertised as such, are obviously aimed at the ...

I have the Opendous-designed NooElec H.F. up-converter. Conventionally, when this converter is enclosed in the specified aluminum shield box, the power to the converter is to be supplied via a usb connection. I preferred the converter independently powered from batteries, and with those batteries al...

To owners of the Grundig FR-200 emergency crank-powered radio: If you like your FR-200 then I think you would really like it a whole lot more if it had its own on-board beat-frequency oscillator (BFO). I built a BFO into my FR-200 three years ago and it's been a worthwhile investment of the effort. ...

For those who like to keep their Vintage Tektronix 1L20 Spectrum Analyzer plug-in going (it is a fine piece of advanced analog electronics mass-production craftsmanship) I briefly detail a solution I've found to be satisfactory to the Y-1641 ceramic UHF Planar Triodes problem, here : http://ki3u.bye...

Hi Jeff - tnx! The publishing history is as follows: as you can see from the schematic I did the work in 2011; at the time I kept a few friends informed of it by emails. Then this last September 16 I scrounged up my notes from back then and wrote the article. On September 22 I obtained a free (and s...

For anyone interested, I've written up some info on Geiger Tube home-construction and operation :

Homemade Geiger Tube - some brief notes

http://ki3u.byethost3.com/homemade_GEIGER-TUBE.html

Happy clicks

Berj / KI3U