[Lowfer] WD2XGJ 136.745 Test

[K2ORS]

Thanks John for the pointer to Lyle's PTC thermistor idea.
I know that I had boxes full of the old Motorola ovens at one point, but I 
may have tossed them out.

73 Warren

----- Original Message ----- 
From: "JD" <listread at lwca.org>
To: "Discussion of the Lowfer (US, European, &amp; UK) and MedFer bands" 
<lowfer at mailman.qth.net>
Sent: Friday, August 31, 2012 11:04 PM
Subject: Re: [Lowfer] WD2XGJ 136.745 Test


The N1EQ solution is a good one, but as near as I can tell it doesn't appear
Murata makes those clip-on heaters any more.

The same basic principle was used by Lyle Koehler in his All-In-One
transmitter article:
http://lwca.org/library/articles/k0lr/all-in-one/index.htm#clock

The PTC thermistor Lyle used was rated for a maximum voltage of 25 (he
operated it at 5V) and a resistance of 50 ohms at a 40° C Curie point.
Those, unfortunately, also seem to be deemed obsolete now.  Some are
available from various vendors in 60° versions, I think, which may be better
anyway for those of us who live in warmer climates.

John
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