Levell R.C. Oscillator Type TG150D

[roadster]

The capacity of a Eveready silver PP9 is 4.5Ah. They cost £3.89 each from my local hardware shop. Cheap alkaline PP3s cost £1.50 individually from the same shop and have a capacity of 0.4Ah. I know which are the better value! It is then just economical to stuff the exhausted PP9s with AA cells at £8 for a box of 40 and a capacity of 2.6Ah; (£1.20 for six).
Rod