[GreenKeys] "Filterless TU" in QST

[gil smith]

Forwarded on behalf of Jack Hart <wa2hwj@att.net>

(Jack:  you sent this from a non-subscriber address -- I usually just
approve these, but hit delete by mistake -- gil)


Does anyone remember an article in QST, sometime in the
60's, which featured a "filterless TU" for RTTY? It
had several tubes and supposedly could copy any
shift. I recall trying to build one, but it didn't
work (maybe my junk parts from old TV sets weren't any
good!). I'd like to get a copy of the article.

Thanks,

Jack WA2HWJ

NNNN


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