[morzh]

The only true dry electrolytic capacitors are solid type tantalum and niobium ones, but they are neither rated for the voltages used in tube radios, nor were commercially available at the time of production.

Now, to be a bit stern, here you have people with tons of experience, some of whom, in addition to being experts in this hobby, are also electronics professionals.
So when several people here tell you the same thing, it is ok to question the reason for it, but to argue is ...let's just say that it does not help you.

With Ron's permission, I will re-quote his friend, Rev. Lowell Mason:


"You don't have to agree with me. You have every right to be wrong if you want to be."