Can a 6SB7 replace a 6A7/6A8?

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Can a 6SB7 replace a 6A7/6A8?

Ron Ramirez
Silent Key

Posts: 13,776
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Joined: Sep 2005
City: Ferdinand State, Province, Country: Indiana

#5

11-15-2010, 09:43 AM

I see one problem. It is necessary to have G3/5 connected on the 6A7 since these are the "screen grid" of the tube and I doubt it would function correctly with no screen voltage?

Ditto G2/4 on the 6SB7Y.

Since G2 is tied to G4 on the 6SB7Y, I don't see how you could wire this tube to function as a 6A7 or 6A8.

I can think of one single-ended tube that has its grids arranged like a 6A7 or 6A8...the 7J7. And it actually has a separate triode section for the oscillator, unlike the 6A7/6A8 where the five grids perform both mixer and oscillator functions.

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Ron Ramirez
Ferdinand IN

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Messages In This Thread

Can a 6SB7 replace a 6A7/6A8? - by 7estatdef - 11-14-2010, 08:37 PM

Re: Can a 6SB7 replace a 6A7/6A8? - by Ron Ramirez - 11-14-2010, 08:47 PM

Re: Can a 6SB7 replace a 6A7/6A8? - by 7estatdef - 11-14-2010, 09:28 PM

Re: Can a 6SB7 replace a 6A7/6A8? - by 7estatdef - 11-14-2010, 09:31 PM

Re: Can a 6SB7 replace a 6A7/6A8? - by Ron Ramirez - 11-15-2010, 09:43 AM

Re: Can a 6SB7 replace a 6A7/6A8? - by Ron Ramirez - 11-15-2010, 09:48 AM

Re: Can a 6SB7 replace a 6A7/6A8? - by 7estatdef - 11-15-2010, 09:58 AM

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