13-03-2018, 10:03 AM
I see Jeffrey has beaten me to the point about the speaker coupling capacitor - if you look at any single battery design you will just see one cap except that, normally, the cap is fitted on the other side of the speaker and the speaker is returned to earth. (It won't make any difference the other way round, though.)
The quiescent current might only be 10mA but, at normal listening levels it will be much higher so that PP3 might not have as much life as you expect.
Which not find a couple of square 4 x AA cell holders - not the long ones - and fit them in place of the 2 PP1s?
Although the price of the excellent AA alkalines sold by Poundland has gone up recently - Shock! Horror!
- you only get five for a pound now instead of six, so, considering the much longer life you can expect from AAs, they still only cost £1.60 for 8. How much do you pay for your PP3s?
The quiescent current might only be 10mA but, at normal listening levels it will be much higher so that PP3 might not have as much life as you expect.
Which not find a couple of square 4 x AA cell holders - not the long ones - and fit them in place of the 2 PP1s?
Although the price of the excellent AA alkalines sold by Poundland has gone up recently - Shock! Horror!
- you only get five for a pound now instead of six, so, considering the much longer life you can expect from AAs, they still only cost £1.60 for 8. How much do you pay for your PP3s?
