[Boatanchors] Commercial/kit transmitters using 1625's

[shoppa_boatanchors at trailing-edge.com]

The ARRL handbooks for many many years had the transmitter using a
single 1625, and a lot of 50's and 60's and even a few 70's QST
artciles showed paralleled/push-pulled 1625's (one even had 8 of
them!) in use in transmitters and modulators.

Even today it's obvious that there were a lot of surplus 1625's
out there for many years.  And of course ARC-5's used them too.

Did any non-mil-surplus rigs, other than homebrew ones, use
1625's from the factory?  How hard was it to sub a 1625 for a
807?  Gotta change the tube base, filament transformer, anything
else?  It seems to me that the 1625 is a little bit taller than
a 807.

Tim.