[RTTY] New call with no numbers

[Kok Chen]

On Dec 3, 2010, at 12/3    6:12 AM, Ktfrog007 at aol.com wrote:

> ??  I'm one of those in the dark about CK722.  Enlighten  me.


One of the first germanium PNP junction transistors that hams used.

http://www.ck722museum.com/

It was followed in later years by the equally ubiquitous 2N107.

Across the pond, the popular transistor among hobbyists was the OC71.   
OC72 if you need a little more more power, and OC45 if you need a to  
go into the "RF" (medium wave broadcast band was about as high they  
could go up to :-).

73
Chen, W7AY