[GreenKeys] REC29

[Tom Hunter]

I recently modernized a REC-29 Power supply.  I pitched the selenium
rectifier and installed a silicon bridge rectifier with a 22 ohm 1 watt
surge resistor.  Ii also replaced the filter cap with a 220 MFD, 200 volt
new one.
The lowest  voltage I can get is 122 volts DC.which suits me fine.
I used 3-pin Molex connectors for the  DC and ground because I had them on
hand.
I skipped the AC output for the Teletype motor. Why run one Teletype from
it when I have so many!

Ohms law will show the power dissipation for various resistors at 60 mils.
It is 3.6 watts per 1000 ohms.

I built a loop supply box with three jacks a 1,5 K , 25 watt resistor (way
overkill) and 1K, 5 watt pot.
It is easy to dial in 60 mils.  I have  patchable 100 mil meters in
multiple places.

I have another REC-29 that I am going to make the same mods to.



Tom   N3CRK
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