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#1
06-11-2010, 10:43 PM
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Sentinel 240 farm radio
Finally got around to a Sentinel farm radio I found a while back. Initially powered it with 10 9volt batteries for the B+ and a C cell for the filaments. This worked pretty well.
Now I'm using an AC adapter I built from plans I found online. A lot easier than all those batteries! Seems like a pretty good set for it's day. It's easy on the batteries drawing 200ma on filaments and 6ma on the B+. The set come on almost instantly I guess those 1.5v filaments don't take long to heat up. 
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#2
06-11-2010, 10:56 PM
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I have a few portable tube types with the 1v tubes and never thought about putting 9 volts in series. 200ma would eat a c cell up pretty fast. They make some 8 amp rechargeable D cells that would be pretty cool for this.
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Linear Mode
