I ordered a whole bunch of diodes for Jameco a while back and in the kit there was allot of 1N270.
I do think they are in production though, maybe not as they use to be. I was looking for the best demodulation diode in the ARRL handbook and Schottky types were the most sensitive. The one I wanted was rated at 0.3 volt forward minimum at 0.001 A and this happens to be the 1N270 but there is a new part type that is rated the same. it is 5082-2835 and next to that is the 1N6263. The later is rated 0.4v @ 0.001 A What is unusual, which I never considered before is the rate of change of voltage and current. The impedance then is lower than you would expect. I had an idea the folk could buy a few low noise amps, like those used inline with coax, maybe even some of the wide band TV antenna models and use them with a simple QSD demodulator as the front end section for some home made gain sections. The TV preamps are not exactly the ones I was thinking of, who knows the noise level of them? But they are cheap at Radio Shack. I was looking at the AD797 low noise amp, but have not seen data for use in the rf range above 1 MHz as a preamp. These are rated low noise. I am kind of doubting it now but I am looking at it stiil. Anyways I can still use Fets as amps. _____________________________________________________________ Click here to find great deals on vending machines. http://thirdpartyoffers.netzero.net/TGL2211/fc/Ioyw6ijnXPBEx73J5iS7jB8OIbBtdxetBgoisGulPN71WOrQujS1ve/
