21 Mar
2007
21 Mar
'07
7:28 p.m.
Tony Duell wrote:
These days, you can get 9V (PP3, 006P, 6F22, whatever you call them)
batteries very cheaply in the 'Everything's a pound' shops (I assume you
have similar shops that sell all sorts of things for a dollar a time). 5
to 10 of those in series will work as B battery, of couse.
Well you can still buy a B battery here on this side of the pond.
http://www.tubesandmore.com/
Personally, I'd use a mains supply. a 30V
transformer (15-0-15, ignoring
the centre tape or a pair of 15V windings in series) feeding a voltage
doubler rectifier (2 diodes, 2 capacitors) will give about 85V, ideal for
most 'battery' valve circuits.
They also sell a power pack kit too for small radios.
I suspect if you dig around over there you can scounge up
a better power supply, for the simple reason parts are whole
lot cheaper now than in one's youth.
-tony