[time-nuts] LPRO in TM500

Corby Dawson cdelect at juno.com
Sun Nov 8 17:09:51 UTC 2009


Dave,

I have in the past installed a number of FRSC and also PRS10 into single
slot TM500 modules.

If I remember correctly I used a thick (about 1/8") aluminum plate most
of the length of the module as the mounting and heat sink.

The edge of the plate was attached to the module with screws and aluminum
angle brackets to allow the top and bottom of the module to also help
with the heat sinking.

They all worked fine.

If you use a dual wide module you will have more room to work with and
maybe could used a finned heat sink.

The edge connector used was one from a guy on ebay that made custom ones
to use with TM500 Modules.

You just screw it into place in the module using the existing holes.

For power I paralleled the two 25VAC windings, fed them thru a full wave
bridge into a largish capacitor, and then into a regulator set for 22VDC.

The regulator is isolated with a silpad and bolted to the top frame of
the module.

The 10Mhz output is on the front along with a lock LED.

Hope this helps.

Corby Dawson
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