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In Reply to: RE: Mullard CV4004 or Mullard ECC83? posted by acass on October 15, 2014 at 11:52:54
Did you buy
Follow Ups:
http://www.ebay.com/itm/MULLARD-ECC83-12AX7-VINTAGE-VALVES-TUBES-TEST-100-AS-N-O-S-/361079012149? I'm not sure if I'm allowed to do this.
I can't capture the full address but this is most of it.
It's a guy in England, dr-tron and he has a whole heap of them. I guess they are pulls from some factory equipment. On reading the ad it does not specify exactly what they are.Perhaps someone with more knowledge than I can tell from the picture what we have.
I've spent the afternoon educating myself. Something I should have done before I pulled the trigger, ah well.
Edits: 10/15/14
Ah....you got short plates since all are after 1960 .
CV4004 were a separate production run and made IIRC up to the end of the Mullard factories c. 1985. They have a warmer balance and among the best of the Mullards in midrange and bass.
Long plates were built from 1954 to 1959. The plate structure is 17 mm long.
1954 to 1957 marks the first series mC1 (acid etched code on glass)
1957 to 1958 is the f91, my personal favorite
1958 to 1959 is the f92
from 1960 on, Mullard 12AX7's are short plates, 15 mm long and the acid etched codes start off I61, I63, etc....
You got the later short plate series which are still nice tubes and the prices if tubes are checked good, are reasonable, IMHO.
I'm going to put them in my EAR 834P hoping they will give me a little more clarity. Problem is my hearing is no where near as good as it used to be and cranking up the volume only destroys it more.
I need a huge soundstage where the instruments/vocalists are well seperated then I can hear whats going on.
I'm in the middle of regrading my system, I don't know if it's going up or down, time will tell.
You can put the linked address into "Optional Line URL" slot, below. And enter a Link Title. Like this...You may want to wait a bit, as I'm in the process of testing some Brimar CV4035 (12AX7 type) and CV4033 (12AT7 type)--- that Tubemonger sent to me.
Just a thought...
Edits: 10/15/14
What did you think of those Brimar 12AX7? I was looking for info on Brimat 12BH7s...
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