impedance for Traynor MK111?

[phsyconoodler]

Anyone know the impedance for a Traynor MK111 with 4-6CA7's?I have one and don't see any markings on the head.

[PRR]

4?

http://www.crumplezone.co.uk/burt/gear/traynor.html
http://www.crumplezone.co.uk/burt/gear/images/traynorback.jpg
http://www.crumplezone.co.uk/burt/gear/images/schematics/721020_YGL3_3A_Mk3.gif

[phsyconoodler]

Thanks PRR.
  My computer here at home won't let me download anything from schematic heaven.I'm not going to fix it.Time for a new one.

 I just finished an Overdrive Rocket with 4-6CA7's using old Traynor Iron.Cathode biased.Sounds very,very good.
Too lazy to make a bias supply,so I tried it cathode biased.The way it sounds,it ain't gettin' changed!