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VTVM EICO 232 LM317 BATTERY CHANGE
Bradley Rush
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Posts: 220
Threads: 56
Joined: Oct 2011
City: Lompoc CA
#1

12-23-2016, 08:23 PM
Did this a while ago. Transformer fused in out. Very stable ohms.


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Bradley Rush
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Posts: 220
Threads: 56
Joined: Oct 2011
City: Lompoc CA
#2

12-23-2016, 08:30 PM
More of the LM317 battery replacement


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Bradley Rush
RadioMonkey
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Posts: 220
Threads: 56
Joined: Oct 2011
City: Lompoc CA
#3

12-23-2016, 08:31 PM
More Eico 232 LM317 REPLACEMENT


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Arran
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Posts: 4,702
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City: Sandwick, BC, CA
#4

04-02-2017, 04:21 AM
I have a slightly older Eico where the previous owner rigged up a substitute for the battery by tapping off the filament winding of the transformer, all he used was some diodes, a resistor, and some large value, low voltage, electrolytics. It worked fine for me until I blew out one of the resistors on the Ohm meter section after I accidentally used to to measure some high voltage.
Regards
Arran
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  1. The PHILCO Phorum
  2. Various and Sundry Categories
  3. Test Equipment