with unquestioned accuracy of thought, Justin Ulysses Morse replied:

Patric D'Eimon wrote:

Another question about the same preamps. There is 47mfd/10v cap just before
the 2n4250 and a 4.7mfd/25v electrolytic cap just after the transistor both
of them in the signal path. Can I replace these with higher quality
components? Polypropolene, mylar, ceramic? Thanks for your help. Patric


I have some 47mfd film capacitors here, and they're about the size of a
D-cell battery. Odds of one fitting onto your circuitboard in the
space available seem slim. a 4.7mfd cap will be smaller, but still
probably larger than the space available. If the circuit is very old,
you might benefit from replacing these caps with new electrolytic caps
because you can get more capacitance into a smaller space than you used
to, and the quality will be higher.

ulysses
Thanks, Patric