What el34 tubes are good for the outside slots MKIIC+

[JOEY B.]

For the Simulclass C+, the best ones are the Sylvania 6CA7 Fat Boy(aka MESA STR-416).

Like these: http://www.ebay.com/itm/Sylvania-6CA7-EL34-Fat-Bottle-Tubes-Perfectly-Matched-Pair-NOS-Very-Nice-/220982527630?_trksid=m7&_trkparms=algo%3DLVI%26itu%3DUCI%26otn%3D2%26po%3DLVI%26ps%3D63%26clkid%3D7537537919247615793