piezoman
Ex Member
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So far I've tried the following:
VT-231 Ken-Rad late 1940's VT-231 RCA early 1940's VT-231 Sylvania late 1940's 6NS7GT RCA mid 1940's 6NS7GT Sylvania early 1950's so-called Bad Boy 6NS7W Sylvania mid 1940's
I have these but have yet to try: 6SN7GT National Union 6SN7GT Tung-Sol VT-231 Raytheon
I've settled for the following in rectification after much trial: a Type 80 balloon in CSP3-25th Edition, a Mullard GZ34 1959 Fat Base in Taboo MK 4-25th mods......and Steve's or other Russian driver tubes......this backdrop complement is solid for now in everyday listening.
Keeping all output tubes purchased, 10-15 years worth, of Svetlana SV83's [with large logo], 6N1P-V-NEVZ Novosibirsk plant 1950's, and a few pairs of Steve's 6P15P's......plus 1 set of TAD EL84's for shits and giggles.
I've sold off/selling off all but the following rectifiers which I am keeping, a lifetime worth: 1 Sophia Electric Aqua 274B - nice 2 Mazda 5Y3G, late 1950's - sweet 3 Mullard GZ34 Fat Base (all 1959) - these are special 2 Telefunken GZ34 early 1960's - these are special 5 RCA 5U4G, all WWII era - bold and delicious 8 Balloon type 80 (National Union, Cunningham, RCA, Air Line, Majestic) - just right
I did NOT like ANY GZ32 in my system.....way too polite, dull, missing detail. They are all sold.
I've significantly leaned down on input tubes, selling most of them.....keeping these: 1 Lorenz PCC88 1 Siemens E188CC early 1960's 1 Siemens E288CC mid 1960's 8 Tesla PCC88 plant 37 early 1980's 6 7308 Amperex 2 7308 Sylvania 1 Amperex 7316, 1958 long plates
Now as for the 6NS7, so far: - REALLY disliked the Ken-Rad, so its sold.....bass was well rendered, but mids and highs really suffered in my setup, seemed quite veiled. Terrible.
- RCA VT-231 & the later non military version: just the right level of warmth in the mids! This is VERY pleasant, with all the detail intact....and level across all frequencies. My #2 favorite so far.
- Sylvania 6NS7W: all of the above in the RCA, plus even better rendering of bass with good detail. My #1 favorite so far.
- Sylvania VT-231 and later non military versions: very clear mids and highs, bass slightly less than RCA. Pretty damned nice. My #3 favorite, just a click below the RCA. The bad boy ain't badder than the rest......I thought earlier it was a 1952, but was wrong...its a 1951.
I've used the 6NS7 as an input only so far.
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