[sdiy] Tau Systems

[jays at aracnet.com]

In the day of Japanese radios most of the transistors used were
germanium and not silicon. PNP germanium transistors were easier to
build and I think may of been less noisy than NPN ones.

Today most silicon transistors out perform germanium ones.

Jay S.


On Wed, 30 Mar 2011 10:41:16 -0700, Dave Manley <dlmanley at sonic.net>
wrote:
> I'd assume any design decisions for Japanese transistor radios were
> driven solely by cost.  Were PNPs cheaper to fab in the early days?
> 
> Dave (how many parts can we stand on end and shove in this little
> plastic box?) Manley
> 
>  On Wed 11/03/30  9:57 AM , "Harry Bissell" harrybissell at wowway.com sent:
>> I've never heard that PNP transistors are less noisy than NPN. Why are they
>> less noisy ?
>> (is that why almost all 60's Japanese transistor radios preferred PNP
>> ?)
>> H^) harry