Alan Melia wrote:
I have collected
a number of Marconi, GR and, and HP diode detectors most would be overkill
as they are rated to 10GHz or higher.
fredschneider2001 wrote:
Here is some info about those things. Very easy to make when it's under 1GHz.
Alan or anyone,
How do you identify which of the old detector diodes go up to 2.4GHz?
That's the frequency where
I want to do some relative measurements to select good antenna layouts for
peak power transfer with milliwatt chip radios. I'll be teeing off of
a folded dipole antenna fed to a dummy load of 200 Ohms, (the antenna impedance),
to go to the detector.
One old diode I have is a gold plated cylindrical can with ceramic middle
and a gold pin on the other end marked 1N21B and "microwave" and uA surrounded by a square.
The diode has an adjusting screw on the flange end of the cylinder can!
Does that mean cat whisker connection?
That one is part of a X485B detector mount that attaches to 1cm X 3cm waveguide.
I have some other diodes like it from slotted lines. How do you tell how fast they are?
John Griessen
