Uuf = what?

Working on a ampex tape deck.

Parts list specifications call for a “350uuf/500v mica cap”.

I have not seen “uuf” before. What is this value in modern common terms?

Can anybody help me figure this out?

Hi @Memphismagnetic, welcome to the forum!

Short answer uuF = pF…

micromicrofarads (μμF; now picofarads, pF)

https://en.wikipedia.org/wiki/Metric_prefix#Double_prefix

Regards,

Thank you Robert!