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65.12.52.15
In Reply to: 12sn7gt tubes posted by sacd_ lover on September 25, 2004 at 03:56:56:
Can you sub one of either of these for a 6SN7 with no mods? Any advantages?
Follow Ups:
6BL7 is a sub for the 6SN7.
I personally have quite a collection of tubes,including a few 6SN7.
New,old stock.
6BL7 is higher gm (and lower rp), lower mu tube. They both have the same pinouts, but when you put 6BL7 in the 6SN7 socket you can expect (depends of the circuit), say about 20-100% higher current through 6BL7, different Ua because of that, lower rp and lower amplification. Sometimes it`s not too important and you can do it, but in other circuits it IS important.
And "swap" can work only in this direction, don`t try to put 6SN7 in 6BL7 socket except you know the circuit and what you are doing.
And last, but not least - 6BL7 "pulls" 1,5A of heater current vs. 0,6A for the 6SN7.
12.6 and draws half the current. Otherwise they are the same.The 6SN7 is easier to find but the 12SN7 is much cheaper.
ja in warm, clear and dark outside, Tucson, AZ
The Elaborate DAC=55/76 or 27 Balanced Preamp=Balanced Six Pacs=Newform Research 645
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