On Fri, 27 Mar 1998 17:45:34 -0700 "Richard W. Ehrhorn" <firstname.lastname@example.org>
>Hi Guys.... Just one comment
>From: Rich Measures [SMTP:email@example.com]
>Sent: Friday, March 27, 1998 6:06 AM
>That's the popular, traditional, cherished, old theory, at least.
>However, orienting two coils end-to-end seemed to me like it would
>enhance coupling, not decoupling. . I built various hv rf chokes to
>check the cherished theory out. I observed that chokes wound with
>supposed anti-resonance gaps have pretty much the same resonances as a
>same-L choke wound without gaps.
>[Richard W. Ehrhorn] ...... Agreed 100% emphatically, Rich. I wonder
>anyone ever really analyzed the old variable-diameter and/or
>73, Dick W0ID >
Dick, the old National R-175 was a part of almost every amp project until
15M came along...it was hot at 21 MHz. The replacement was the R-175A but
to my knowledge no one else has continued with that concept.
I have a NIB R-175A and you just got my interest up....got to take some
measurements but have to wait a few days.....too many priorities..too
Remind me if I forget but just got another call about my 88 yr old
mom...so may be heading to NC soon. I'll have the laptop with me also.
73 Carl KM1H
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