AF3 (AF3)
ID: 198076
This article refers to the component: To the tube/semiconductor
? AF3 (AF3)
24.Aug.09 01:12
0
What can I use as a more modern equivalent to a AF3?
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6K7 or 78
24.Aug.09 15:06
Hi Philip,
there is no direct modern equivalent, the AF3 was the end of the line.
However, you can use a 6K7 (-G, -GT) as substitute, by changing the socket and supply the 6.3 V heater voltage, probably by a small 4 to 6.3 V step-up auto-transformer or by some additional windings on the power transformer. As well you need to realign the surrounding tuned circuits.
A 78 may also work.
Best Regards, Jacob
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