NAD: Fortin Evil Pumpkin

This statement is only partially correct.

RFT EL34 from the 60's and 70's, Mullard EL34 from the 60's and 70's and RCA 6L6GC blackplate from the late 50's and 60's have an almost infinite lifespan.

I have measured these tube types after a reliably assured rehearsal & live use of a total of up to 3,000 hours with at least 70-80% residual power.
That is great because I have NOS RFT in my amp now.
 
This statement is only partially correct.

RFT EL34 from the 60's and 70's, Mullard EL34 from the 60's and 70's and RCA 6L6GC blackplate from the late 50's and 60's have an almost infinite lifespan.

I have measured these tube types after a reliably assured rehearsal & live use of a total of up to 3,000 hours with at least 70-80% residual power.
THIS.

Maybe the vintage tube market will come back down a bit, so everyone can grab some for their stash. Glad I built mine up over the years.
Been running my Siemens 34s in my Marshalls for years now and not one failure. None of them were NOS purchases...used only.
 
"Her last one, came out Sideways....."
She didn’t scream or nothin…
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THIS.

Maybe the vintage tube market will come back down a bit, so everyone can grab some for their stash. Glad I built mine up over the years.
Been running my Siemens 34s in my Marshalls for years now and not one failure. None of them were NOS purchases...used only.

Do you have actual Siemens EL34s or Siemens-branded RFTs?
 
I’ve had both Larry and the Satan if this counts for anything . Idk ? While the Larry destroys the Satan , the Satan is pretty fucking solid . I’d expect the EP to be better than the Satan for sure . If we lived close we could compare them . Woukd be killer
 
Do you have actual Siemens EL34s or Siemens-branded RFTs?
What I have are the dimple top, skinny glass envelope, and shallow/small base EL34s. They almost look like 'miniature' EL34s compared to other 34s. I've always considered these Siemens W Germany....but, maybe they're RFTs. I guess I'm not exactly sure...they're German for sure....and, they handle the high voltage in my 72 without difficulty. I have heard that either RFT or Siemens are NOT able to handle high PV. They've also been in a 2010 Wizard MC 100, no issues with that voltage and if I remember right that amp was in the 570v range (unloaded).
 
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