Raytheon CK722 transistors

[Kyle]

Hi, my mother recently had a co-worker give her some Raytheon CK722
transistors in their original packaging. They were found in the
attic of his new home. They have the blue tops and each is in the
envelope packaging. I'm not sure what year they're from, but the
packaging is quite yellowed. She sent them to me since I now work
for the company. I was wondering if I sold them on ebay, what the
going price would most likely be. I've come to understand they're a
collectible.

If I'm not going to get very much for them, I'd rather keep them for
myself.

I figured someone on here might have an idea.

Thanks,
Kyle

 

[Al]

Hi, my mother recently had a co-worker give her some Raytheon CK722
transistors in their original packaging. They were found in the
attic of his new home. They have the blue tops and each is in the
envelope packaging. I'm not sure what year they're from, but the
packaging is quite yellowed. She sent them to me since I now work
for the company. I was wondering if I sold them on ebay, what the
going price would most likely be. I've come to understand they're a
collectible.

If I'm not going to get very much for them, I'd rather keep them for
myself.

I figured someone on here might have an idea.

Thanks,
Kyle

Try here: http://semiconductormuseum.com/Museum_Index.htm

Al

 

[Watson A.Name - \Watt Sun, the Dark Remover\]

Hi, my mother recently had a co-worker give her some Raytheon CK722
transistors in their original packaging. They were found in the
attic of his new home. They have the blue tops and each is in the
envelope packaging. I'm not sure what year they're from, but the
packaging is quite yellowed. She sent them to me since I now work
for the company. I was wondering if I sold them on ebay, what the
going price would most likely be. I've come to understand they're a
collectible.

If I'm not going to get very much for them, I'd rather keep them for
myself.

I figured someone on here might have an idea.
Thanks,
Kyle

The package (in good condition) adds greatly to the value. From what
I've seen recently, they could bring from $20 to $50 or more apiece
depending on condition, demand, etc.

 

[Richard]

I remember CK722s as the first hobbiest transistors available and as
such are very collectable. I do remember the first ones that I had in
the 50s were aluminum colored. Maybe the blue was later.

Richard

 

[Michael]

I remember CK722s as the first hobbiest transistors available and as
such are very collectable. I do remember the first ones that I had in
the 50s were aluminum colored. Maybe the blue was later.

Richard

My first transistor was 2N107 (I think). Never saw a CK722 in the wild,
but in 1964 (or '65) I did see a substitution book that listed CK722 as
substitute for 2N107.

Oh, the silly stuff that we remember; oh, the important stuff that we
forget!

Michael

 

[Watson A.Name - \Watt Sun, the Dark Remover\]

My first transistor was 2N107 (I think). Never saw a CK722 in the wild,
but in 1964 (or '65) I did see a substitution book that listed CK722 as
substitute for 2N107.

Oh, the silly stuff that we remember; oh, the important stuff that we
forget!

I remember it was really difficult for me to scrape together enough
money to get a 2N107. And I had to get my parents to give me a ride
over to some distributor to get it - hey I was just a kid. Later, I
came across a lot of germanium transistors from boards I bought at
Palley's surplus. They had big barrels of circuit boards from old GE
computers, all of them had the gold plated card edge cut off, for the
gold.

Yeah, silly memories.

 

[N. Thornton]

The package (in good condition) adds greatly to the value. From what
I've seen recently, they could bring from $20 to $50 or more apiece
depending on condition, demand, etc.

wth for? I think ive got a whole bag of those somewhere, I cant
imagine someone paying 20 for a common tranny. I cant seriously belive
I could get 1000 for a bag of 50 loose trs.

What is it with people, seems like any old carp sells at auction these
days.


NT

 

[Richard]

I remember it was really difficult for me to scrape together enough
money to get a 2N107. And I had to get my parents to give me a ride
over to some distributor to get it - hey I was just a kid. Later, I
came across a lot of germanium transistors from boards I bought at
Palley's surplus. They had big barrels of circuit boards from old GE
computers, all of them had the gold plated card edge cut off, for the
gold.

Yeah, silly memories.

Oh you young puppys.
This is 1956. This article talks about the intro of the transistor:

http://www.ck722museum.com/page8.html

I actually built this circuit. I remember those little B2M solarcells
and 365 MFD tuning capacitors are a big collectors deal now. In bright
sunlite it actually worked:
http://www.ck722museum.com/page8.html

Richard

 

[Watson A.Name - \Watt Sun, the Dark Remover\]

"Watson A.Name - \"Watt Sun, the Dark Remover\""

wth for? I think ive got a whole bag of those somewhere, I cant
imagine someone paying 20 for a common tranny. I cant seriously belive
I could get 1000 for a bag of 50 loose trs.

What is it with people, seems like any old carp sells at auction these
days.

I will post a .PDF (or maybe more) of the printout of a recent Ebay
auction of a CK722 on the alt.binaries.schematics.electronic newsgroup.
I'll use the same Raytheon CK722 transistors title.

You say you can't imagine? Maybe that will make your jaw drop!

 

[Watson A.Name - \Watt Sun, the Dark Remover\]

"Watson A.Name - \"Watt Sun, the Dark Remover\""

Oh you young puppys.

You mean puppies? I remember that those solar cells must have been
selenium because when I soldered to them they smelled just like the
'stink stack' selenium rectifiers.

Back then I built a 'SupereX' 3 transistor radio kit that used the
smaller blue ones, which were unlabeled. Unfortunately this used a
simple 'crystal radio' type of tuned circuit and detector, with a 3
transistor audio amp after it. And since I lived a mile or two from a
50kW radio station, it was nearly useless - a one station receiver over
the whole dial!

 

[N. Thornton]

I will post a .PDF (or maybe more) of the printout of a recent Ebay
auction of a CK722 on the alt.binaries.schematics.electronic newsgroup.
I'll use the same Raytheon CK722 transistors title.

You say you can't imagine? Maybe that will make your jaw drop!

If I had acess to abse it might well. What did they fetch?


NT

 

[Watson A.Name - \Watt Sun, the Dark Remover\]

"Watson A.Name - \"Watt Sun, the Dark Remover\""


If I had acess to abse it might well. What did they fetch?

NT

Go to Usenet replayer to get those binaries.
http://www.usenet-replayer.com/groups/alt.binaries.schematics.elec
tronic.en.html.gz