[time-nuts] EFC divider resistors

[Dave M]

To all those time-nuts (volt-nuts as well) who have been chatting about 
temperature controlled environments, here is my input.

I found a very neat ready-built controlled oven at a number of hamfests in 
the southeast (Florida & Alabama) that work quite well to enclose small 
circuits that need to be temperature controled  I found them still being 
sold by Fair Radio (www.fairradio.com) for only $12 apiece.  Schematic is 
included to increase their value to us hackers. Their catalog number is 
OSC-8004290G1.  The outside dimensions of the box is 6.5x2x3.3 inches, with 
about 0.5 inches of insulation and inner enclosure.

They were used in Army GRT-21/22 transmitters, and contain all the necessary 
temperature control circuitry, as well as a crystal oscillator.  I bought a 
couple of these gems and removed the oscillator circuitry and had a nice 
oven assembly with enough room inside to house a lot of circuitry for just 
about any thing requiring close trmperature control.  It's designed to run 
at 75C, but with a few resistor changes, the temperature can be lowered if 
desired. It's insulated pretty well, too.

Not a power miser by any stretch, but it has lots of potential.

Cheers,
Dave M