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previous: Bob S. I have several AC-10's and have top... -- 10/10/1999 5:13 PM	View Thread

Re: How about a quick primer on EF86's?

10/11/1999 5:49 AM
Steve A.	Re: How about a quick primer on EF86's? Bob: Do you have any tips for replacing the EF86 with a 12AX7? I was looking at an AC15 schematic earlier today and the EF86 uses a 220k plate resistor and a 2k2 cathode resistor bypassed with a 25uF cap; would you change those values? I assume that you would just discard the components soldered to pin #1 (G2): the 0.1uF cap to ground and the (x)Meg resistor to B+. And you would use the same value coupling cap (0.01uF) going to the Brilliance switch? Thanks! Steve Ahola

10/11/1999 5:49 AM

Steve A.

Re: How about a quick primer on EF86's?

Bob:

Do you have any tips for replacing the EF86 with a 12AX7? I was looking at an AC15 schematic earlier today and the EF86 uses a 220k plate resistor and a 2k2 cathode resistor bypassed with a 25uF cap; would you change those values? I assume that you would just discard the components soldered to pin #1 (G2): the 0.1uF cap to ground and the (x)Meg resistor to B+. And you would use the same value coupling cap (0.01uF) going to the Brilliance switch?

Thanks!

Steve Ahola

Replies:

Bob S. Steve:Yes you would... -- 10/11/1999 4:45 PM