dose any one know what is a Feiler Electronic "Stethoscope

[J Forster]

Oops...  you learn something new every day!

http://findarticles.com/p/articles/mi_qn4155/is_19991021/ai_n13840372
and
http://oak.cats.ohiou.edu/~postr/bapix/SigTrac1.htm

-John


spalletta wrote:

>   dose any one know what is a Feiler Electronic Stethoscope is and what
>   it was used for in the world of HAMS? Thanks Phil K1PAS

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