I bought my first, 3 of them from Allied Radio in the late '50s. I made a
three stage IF strip amplifier with them. As I remember, they were packaged
in thin plastic tubes with a plastic cork, skinny, taller than they were
wide and with long leads...maybe an inch long. They were a buck each.
My first power transistor was a 2N35. We had to check them out from the EE
storeroom for the lab of an EE course at the U of Illinois, Urbana. I forget
what the exercise was about, it went well, but I mostly remember the plastic
box the transistor came in and the sheet I had to sign for it.
-
: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Leigh L. Klotz Jr
WA5ZNU
Sent: Thursday, May 26, 2011 5:35 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] CK722 transistor
John Adams-2 wrote:
I peeled the blue metal cover off and some gooey stuff
I once broke a leg off my ck722, I was a teenager and couldn't afford to buy
another one, so
I peeled the blue metal cover off and some gooey stuff, and there was a
smaller, silver metal
cased transistor inside. It's leads were long enough and I used that.
I really enjoy my K3.
John.
I obtained a CK722 when I was about 9 years old. It was the first
electronic part I ordered. The only place I could think of to get one
was Heathkit, and somehow I managed to talk them into sending me one
as a replacement part.
It was a few years later that I ordered my second part: a disc
John Adams-2 wrote:
I peeled the blue metal cover off and some gooey stuff, and there was a
smaller, silver metal
cased transistor inside.
Photos? Here you go: http://ck722museum.com/page6.html
The site has internal broken links, but if you look at the URL and replace
the geocities
Gee, I think it was just before I was licensed (in 1964) that I
ordered my very first KC722 -- from PolyPaks in Lynn, MA, if I recall.
It arrived with one lead missing, so I wrote (you couldn't afford to
call back then, at least at the age of 16) and received another, in
good shape. Then, a few
They got my first order correct. I'm taxing old dormant gray matter. But what
was their first sales?
If I have it all correct the founders started out selling a PCB and parts kit
for a design of a keyer
that was in QST, called Digikey. It used Motorola MC 700 series RTL logic on an
about 1.5
9 years old, eh? Apparently savvy engineers show their talents early
:-) My grandmother bought one for me when I was 13, $10 or so I think,
I built a crystal radio using it as the audio amp, and she was so
impressed. Grandma always told me I was a genius. Mom, Dad, and Life
... not so
Sometime back in the '50s, I built an RF powered CW monitor called
Snortin' Morten with a CK722. I remember sticking a wire into the PA cage
(DX-35? Viking II?) to sample the RF. Not the smoothest note in the world.
I think I built it from a schematic in CQ (editor was Wayne Green), but
can't find
John Adams-2 wrote:
I peeled the blue metal cover off and some gooey stuff, and there was a
smaller, silver metal cased transistor inside.
I think the gooey stuff was heat sink compound. Before the planar
process was invented for making transistors and ICs, the junctions were
formed by
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