[tasar]

prefer blackplate Raytheon or RCA

[Ern Dog]

This tube doesn't get much attention these days.  I found lots on eBay if you haven't checked there yet.

I'm also going to need to eventually get a pair of these for my Coincident Dragon tube mono blocks.

Good luck on finding the ones you want.

[tasar]

running in dual triode with my custom blocks......whopping 1.5w with good electrics......to my coax in open baffle......most dynamic pure neutral tube around........get your self a pair

[gfederys]

Good Evening, I have a one black plate marked Zenith, a pair of Sylvania black plates, and a pair of Radio Shack grey plates. The Rat Shacks go for more because they come with a lifetime warranty

[tasar]

yes, Rats and Zens are Slvs derivatives.... I will hold out for Raytheon and RCAs blackplates

[Ericus Rex]

If you have a 12.6V heater supply and are able to rewire it to parallel instead of series you can install 13EM7 which might open up the possibilities for you.  I've also found they are sometimes less expensive than the 6V version.

[Ern Dog]

Good Evening, I have a one black plate marked Zenith, a pair of Sylvania black plates, and a pair of Radio Shack grey plates. The Rat Shacks go for more because they come with a lifetime warranty

Since the OP passed on your offer, I'd be interested in the pair of Sylvania black plates.  I'll send you a PM.

Thanks,
Ernie