[ARC5] Loctal Tubes

[Geoff]

The 7E5 and 7F8 were among those that worked well beyond octal frequency 
ranges.


----- Original Message ----- 
From: "Dennis DuVall" <scr522 at earthlink.net>
To: "ARC-5 List" <Arc5 at mailman.qth.net>
Sent: Tuesday, May 01, 2012 3:21 AM
Subject: Re: [ARC5] Loctal Tubes


>
> My understanding is that Loctals were originally developed for mobile
> use, to stay securely "locked" in their  sockets.  Later on they were
> thought to be superior for RF use  because the pins came straight out
> through the glass on the bottom, i.e., shorter leads and no "lossy"
> bakelite base.  Don't believe the latter claim proved to be true in
> practice.  My direct experience with loctals has been with the BC-659
> FM transceivers where I've found pin corrosion and socket connections
> to be major problems.
>
> Dennis D.  W7QHO
> Glendale, CA
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