[Boatanchors] VC radio tube questions..Update

[J. Forster]

The questions:

In the first stage, the tube appears to be a 1R5, except that a 1R5 has pin 5
internally tied to pin 1. In the circuit, pin 5 is tied to a decoupled b+
through a 15K resistor and a 0.2 MFD bypass capacitor to ground. Does anyone
know of another tube, similar in most respects to a 1R5, but which would likely
use a decoupled B+ to pin 5?

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Thanks to all who replied. A 1L6 seems to fit the circuit perfectly. I'll check
into the 1R5 with the cut pin also. Thanks very much.

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The next question is similar, but concerns the output stage. It is clearly
supposed to be a pentode, with the screen on pin 4, connected to B+ through a 22
K resistor. So, does anyone know of a tube like a 1L4, but with the following
pinout:

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Also, it looks like a 1S4 is a very reasonable choice for this location. (The
3S4 has the wrong filament hookup)

So, for those interested, the tube lineup is:

V1   1L6  LO & Mixer/Amp  (possibly a 1R5 with clipped pin)
V2   1L4  1st IF
V3   1L4  2nd IF
V4   1S5  Det & Audio Amp
V5   1S4  Audio Output
V6   ???  TBD

Thanks very much to all who replied. Your expertise is very much appreciated.

-John