Please excuse the bandwidth

[Mark Graalman WB8JKR]

 Please excuse the bandwidth on what is really non-Heath
related, but I figured if anyone knew it would be someone
on the Heath list.

 Anyway, back in the mid to later 60's in either
Popular Electronics, or Electronics Illustrated there
was a construction article on building a "Heart Monitor"
it slipped on one finger, and I *think* it used a photocell
or something. Anyway in the article they used an old 500
series Tektronix scope, and I think the article was featured
on the front cover.

 Does anyone remember the article, and happen to know
what issue and what magazine it appeared in?

Thanks & 73,

Mark  WB8JKR

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