Cost To Date

Tubes, TubeDepot, $23.75
Tube, VacuumTubes, $10.00
Filter Caps, Digikey, $2.05
Filter Caps, Digikey, $3.15
Paper Caps, Digikey, $24.28
Knobs, Bias Pot, IF Xformer Play Things of the Past, $31.35
Speaker Connector, NAPA, $2.96
Transistor, Quest Components, $32.50
Weld Nuts, McMaster-Carr, $2.00
TOTAL $132.04

Friday, December 13, 2013

Cow Pasture

OK, capacitor. I call large capacitors "Cow Pastures". I got this name for them from a an engineer colleague when I first started work at Melpar, E-Systems back in 1977. He was in charge of the AN/UIC-7 Digital Intercom System that was used in all the ground intercept systems. I digress...

To keep the radio looking original I gut the old filter capacitors and reuse the can to hold the new capacitors.

Cow Pasture removed from chassis
 The bandit

 Odd to see a Motorola name on it, didn't think that they made Cow Pastures

 So I start by grinding down the bottom edge to remove the mounting ring, bottom plate, and the guts.

 Here are the three capacitors that replace the guts. Even Cow Pastures have gotten smaller.

 New capacitors installed on the bottom plate. I made another plate from perf board to hold it all together with the help of epoxy.

Capacitor assembly test fitted

Completely assembled and epoxied and ready to go back into the radio after testing.

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