If possible the colour coding of the resistor would be nice :-)
2006-06-23 09:10:02 · 3 answers · asked by Mindwarp 1 in Consumer Electronics ➔ Other - Electronics
A series resistor is rather unsatisfactory because of the power and therefore heat it will dissipate. This will be about one tenth of the radio's comsumption.
A variable transformer is rather expensive unless you find a bargain on eBay, and the ratio of voltages is such that you are not likely to find a normal step-down transformer.
However, if you can find a second hand transformer with a primary for nominally 230V but with taps to accomodate 240, 230 and 220 and it has a power capacity at least as great as the radio's consumption then you can use that primary as an auto transformer (which is what a variable transformer is.)
You would connect the 230 input to the 0 and 240 terminals and take your output from the 0 and 220 terminals.
2006-06-23 12:27:27 · answer #1 · answered by dmb06851 7 · 4⤊ 1⤋
there is so little difference in those two voltages, I can think of no reason why you can't use 230VAC. The power supply is going to rectify, filter, and regulate it, so I can't see how it would matter. But if you're totally serious, you could use a step down transformer or a variac like previous dude suggested. A resistor would have to be huge to not burn up.
2006-06-23 11:29:01 · answer #2 · answered by jimbob92065 5 · 0⤊ 0⤋
Hmm - You normally wouldn't need to reduce the voltage - check the heater specs & any transformers in the set..
210v sounds like a weird navy voltage..
Using a resistor to drop 20v at a fair current would need quite a large one..
If you really need 210v ac - use a variac (look on ebay) - a variable transformer.
2006-06-23 09:19:27 · answer #3 · answered by want_to_explore_life 3 · 0⤊ 0⤋