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Safe to powerup without Speaker?
Ron Ramirez
Silent Key
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Posts: 13,776
Threads: 580
Joined: Sep 2005
City: Ferdinand State, Province, Country: Indiana
#18

12-28-2014, 05:37 PM
7G7 is a sharp-cutoff pentode; 7B7 is a remote-cutoff pentode. You need a 7B7 for proper AVC action.

7AH7 is the preferred substitute but 7A7, 7H7 and 7T7 will also sub.
http://www.nj7p.info/Tube/SQL/Tube_query.php?Type=7B7
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Ron Ramirez
Ferdinand IN
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Messages In This Thread
Safe to powerup without Speaker? - by keith49vj3 - 12-25-2014, 05:00 PM
RE: Safe to powerup without Speaker? - by David - 12-25-2014, 09:37 PM
RE: Safe to powerup without Speaker? - by OZ4 - 12-25-2014, 09:56 PM
RE: Safe to powerup without Speaker? - by morzh - 12-25-2014, 10:02 PM
RE: Safe to powerup without Speaker? - by morzh - 12-26-2014, 12:54 AM
RE: Safe to powerup without Speaker? - by joejoe - 12-27-2014, 12:36 AM
RE: Safe to powerup without Speaker? - by morzh - 12-27-2014, 05:14 PM
RE: Safe to powerup without Speaker? - by OZ4 - 12-27-2014, 05:22 PM
RE: Safe to powerup without Speaker? - by Warren - 12-27-2014, 06:11 PM
RE: Safe to powerup without Speaker? - by morzh - 12-28-2014, 05:14 PM
RE: Safe to powerup without Speaker? - by Ron Ramirez - 12-28-2014, 05:37 PM



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