[Diabolical Artificer]

That makes more sense Tony. Looking at my wire gauge load carrying capacity chart,which uses the 700 circular millimeters per amp rule for power transmiss gives 23 AWG gauge at 22 thou can carry 4.7A. This is for a wire in free air. The load carrying capacity goes down if the same gauge wire is wound on a tfmr. Therefore the spec on the datasheet is probably more concerned with heat generated so that the insulation of the plug doesn't break down; so the plug will do the job. As turretslug says, the datasheet doesn't help us much, but as long as i keep within reasonable limits she'll be right.

As you see in the title "yer onner" it says 807 (maybe) : ) I dropped the idea of using 807's David a few pages back because I didn't want to exceed the 807's g2 300v max spec and would have had to connect the 807's in pentode config rather than UL.

Am using DC heater's on the front end and PS but not the EL34's. I'm just connecting them in series with two separate 18.9v 1.5A htr windings. It makes things neater and reduces the wire gauge thickness of the windings.

The PSU to the McMurdo connector goes something like this, provisionally : -
Pins -
1) HT 450v DC @ 700mA
2) Signal in +
3) Htr 1 12.6v DC @ 300mA for front end and phase splitter
4) Htr 2 6.3v AC referenced to 100v for cathode follower
5) Htr 3 18.9v AC @ 1.5A for 3 x EL34
6) Htr 4 18.9v AC @ 1.5A for 3 x EL34
7) Neg Bias - 100v DC
8) OPT sec 4 ohm tap
9) Ground
10) Signal in - Htr 1 18.9v etc
11) Htr 1 12.6v DC etc
12) Htr 2 6.3v etc
13) Htr 3 18.9v etc
14) Htr 4 18.9v etc
15) OPT sec 8 ohm tap
16) OPT sec 16 ohm tap.

Andy.