Andy Evans wrote:

I have pairs of B139, B110 and T27 (though Bailey/IMF was Celestion
1300 to Coles supertweeter) out of a transmission line. If you want
these to build the original design let me know. I'm in W.London
aeatartsandmedia~at~aol~dot~com

Who hasn't? :-)

I've also got the plans for the C. J. Rogers TL including circuit diagram
of the Cambridge Audio R50 crossover, if anyone is interested.

Many people consider a TL a waste of space and that a bass reflex box is
better.
Though a B139 needs an enormous box, 120litres or so, for a reflex,
so a TL is not so bad for it.

--
Eiron

I have no spirit to play with you; your dearth of judgment renders you
tedious - Ben Jonson.