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Hi All,
What do you think about using the B7 10K nickel in a 27 linestage (vs. the more obvious 15K choice)
Works ok?
Recipe for disaster?
Good, but compromised low end response?
Thanks
Follow Ups:
Hey Max,
I think I know why you are asking? ;)
Btw, anyone can tell me how to tell if my B7-10Ks are nickel or m4? They say "LN" on one side.
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"When Khruschev said "we will bury you" I don't think he meant with surplus parts." zacster
OK--so what does LN mean? 60%?
Given this, might it not have the inductance needed for the Rp of a 27?
The R sub p of the #27 tube ranges (in the RCA supplied sample operating points) from 9K to 11k. Which is probably too high for the B7-10K.
LN in this case would be 49%. This can vary a bit depending on manufacturer and who the supplier of the raw nickel alloy is... say from 45% to 49%.
Key here to understand is that all "nickel" lams are alloys... they are not pure 100% nickel.
HN (high nickel) is between say 75% to 80%.
The quality (perm and losses) of nickel lams is very much dependent on the annealing of the lams.
Vint NI (which you might see on some of our products) is a low nickel steel that is NOS and was made fifty plus years ago.
If a product has just NI on the coil then it is also low nickel.
MSL
Builder of MagneQuest & Peerless transformers since 1989
LN = "low nickel"
Builder of MagneQuest & Peerless transformers since 1989
Yes, you guessed it.
I have some nice 27 mesh plates and some 101Fs (actually the STC equivalent).
I was going to use the B7s for the STC DHT--the lower Rp I think would be a good match with the 10K primary.
But the easier implementation around the 27 filament is so appealing to me...
Cheers
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