Search found 36 matches
- Sun May 25, 2014 4:26 pm
- Forum: General Discussion
- Topic: Improving Kaito KA500 and similar radios' performance
- Replies: 0
- Views: 19248
Improving Kaito KA500 and similar radios' performance
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 ...
- Fri Nov 22, 2013 7:59 pm
- Forum: General Discussion
- Topic: Mechanicals for NooElec SDR dongle + H.F. Up-Converter
- Replies: 0
- Views: 14336
Mechanicals for NooElec SDR dongle + H.F. Up-Converter
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...
- Mon Nov 18, 2013 12:30 pm
- Forum: General Discussion
- Topic: How about an on-board BFO for the Grundig FR-200 ?
- Replies: 0
- Views: 15017
How about an on-board BFO for the Grundig FR-200 ?
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. ...
- Mon Nov 11, 2013 10:48 am
- Forum: General Discussion
- Topic: Substitute UHF Oscillator Tubes for the Tektronix 1L20 Spect
- Replies: 0
- Views: 14069
Substitute UHF Oscillator Tubes for the Tektronix 1L20 Spect
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...
- Thu Sep 26, 2013 6:05 am
- Forum: Geiger Counter
- Topic: home-made GEIGER Tube
- Replies: 2
- Views: 19043
Re: home-made GEIGER Tube
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...
- Mon Sep 23, 2013 12:44 pm
- Forum: Geiger Counter
- Topic: home-made GEIGER Tube
- Replies: 2
- Views: 19043
home-made GEIGER Tube
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
Homemade Geiger Tube - some brief notes
http://ki3u.byethost3.com/homemade_GEIGER-TUBE.html
Happy clicks
Berj / KI3U