120NIT electron tube manufactured by United Technical Publications, listed as 120NIT (circa 1965).

50NIT electron tube manufactured by United Technical Publications, listed as 50NIT (circa 1965).

25NIT electron tube manufactured by United Technical Publications, listed as 25NIT (circa 1965).

120KT electron tube manufactured by United Technical Publications, listed as 120KT (circa 1965).

50KT electron tube manufactured by United Technical Publications, listed as 50KT (circa 1965).

25KT electron tube manufactured by United Technical Publications, listed as 25KT (circa 1965).

RW56 electron tube manufactured by United Technical Publications, listed as RW56 (circa 1965).

RW55 electron tube manufactured by United Technical Publications, listed as RW55 (circa 1965).

459E electron tube manufactured by United Technical Publications, listed as 459E (circa 1965).

453E electron tube manufactured by United Technical Publications, listed as 453E (circa 1965).

458E electron tube manufactured by United Technical Publications, listed as 458E (circa 1965).

456E electron tube manufactured by United Technical Publications, listed as 456E (circa 1965).

454E electron tube manufactured by United Technical Publications, listed as 454E (circa 1965).

452E electron tube manufactured by United Technical Publications, listed as 452E (circa 1965).

45IE electron tube manufactured by United Technical Publications, listed as 45IE (circa 1965).

450E electron tube manufactured by United Technical Publications, listed as 450E (circa 1965).

20AV electron tube manufactured by United Technical Publications, listed as 20AV (circa 1965).

16AV electron tube manufactured by United Technical Publications, listed as 16AV (circa 1965).

10AV electron tube manufactured by United Technical Publications, listed as 10AV (circa 1965).

5AV electron tube manufactured by United Technical Publications, listed as 5AV (circa 1965).