21 Dec
2007
21 Dec
'07
8:12 p.m.
From: dkelvey at hotmail.com
The earliest reference I can find on the web is 1971. I made mine
in 1975 so it must have been around for some time before that.
Dwight
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From: cclist at sydex.com
From: Dave McGuire
Hi Chuck
Why not. JFETs were clearly available in 1965. There is one
web page that shows using a regular trnasistor and a N-JFET
instead of the P and N pair.
All the parts were available in 1965. I don't know what
date the lambda diode was first made.
Dwight
On Dec 21, 2007, at 2:07 AM, dwight elvey wrote:
I don't know if Lambda diodes would meet the 1965 test. Gunn diodes
(another possibility) might, however--invented in 1963.
Cheers,
Chuck
As a cheaper alternative to a tunnel diode, do a
search for
a Lambda Diode. I used one of these circuits once to make an
oscillator that ran at over 100MHz.
Oh my, there IS an almost-equivalent-to-a-tunnel-diode circuit! That
looks really, really neat...I will have to play with that!