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Is there a secret to using the 7A4?
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Posted on January 6, 2017 at 20:34:25 | ||
Posts: 2712
Location: PACIFIC Joined: August 8, 2010 |
I hooked up according to the base diagram. it is taking the place of a section of 6sn7. B+ is 300. Plate resistor 80k , Cathode resistor is 360 ohms. Filament voltage is 6.4vac. I am using it as a driver tube. I put signal on G1 and get nothing. I just did the same circuit with a 6j5 with no problems |
You do know it's a different pinout?, posted on January 7, 2017 at 04:04:05 | |
Posts: 4378
Joined: October 20, 2000 |
Different pinout, but otherwise should work the same. |
RE: what about the central locator pin?, posted on January 7, 2017 at 11:06:28 | |
Posts: 584
Location: Alberta, Canada Joined: August 4, 2004 |
Ground it. |
Ok, thank you , nt., posted on January 7, 2017 at 14:41:41 | |
Posts: 2712
Location: PACIFIC Joined: August 8, 2010 |
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