Altec F-500A Field Supply

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Hi All,

Someone wants me to make this power supply for the Altec Lansing 287 field coil per the schematic below and I can't seem to find any information on the power transformer or the choke. The required output is 220 vdc at 220-360mA. Any idea as to what the spec could be for the two transformers?

Thanks!

Min

[battradio]

A 270 volt center taped power transformer rated 400 ma or better with a 5 volt winding a 6 amp , will do the job with a 1 hy choke .


you can go up in value with the voltage if you use a larger choke .

This would work if you wire the filaments of the two 5Z3's in series http://www.edcorusa.com/p/769/xpwr166_120

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This is extremely useful. Thanks for taking the time to calculate for me!
Min

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One question. 1 hy chokes don't seem readily available commercially. What are my alternatives if I wanted to use off-the-shelf 2.5 - 5 hy chokes in the circuit?
Min

[kheper]

Hammond 194G. The specs are:
3H @ 250ma

http://www.hammondmfg.com/pdf/EDB194G.pdf

$27 at Angela Electronics.

http://angela.com/hammondchoke194g.aspx