Well I'm using a 6F12P for that now and exceeding it's voltage ratings, too.
12SL7 would probably also work.
12SL7 would probably also work.
The case of the McIntosh amps is even more interesting. The model Mc240 (early 1960's, 6L6 family outputs in classic McIntosh circuit) uses ECC83 Telefunken (12AX7 family) as cathode followers driving the output valves. These operate at +430 VDC on the anodes and bias voltage (maybe -30 to -45 VDC) on the cathodes. It's not unusual, in fact it's common, to see the original Mc roller-stamped valves still in operation. Yikes!
Of course it would be crazy to try to do something like that today. Those valve manufacturing capabilities are gone. But ya also have to ask, wasn't it crazy back in 1961 too? Especially for a stodgy old company like McIntosh, and while Frank was still alive? They must have known something.
All good fortune,
Chris
Of course it would be crazy to try to do something like that today. Those valve manufacturing capabilities are gone. But ya also have to ask, wasn't it crazy back in 1961 too? Especially for a stodgy old company like McIntosh, and while Frank was still alive? They must have known something.
All good fortune,
Chris
I find it's more about the average tube vs some tubes are just better than others.
I had an AMD Barton chip that was "1.4V, 1866MHz" that had no problem overclocking to 2500MHz stable using 2.0V (datasheet max voltage) but not all would do it 🙂 I needed to dump 200+ Watts in to a Peltier to cool it, but it worked 🙂
I had an AMD Barton chip that was "1.4V, 1866MHz" that had no problem overclocking to 2500MHz stable using 2.0V (datasheet max voltage) but not all would do it 🙂 I needed to dump 200+ Watts in to a Peltier to cool it, but it worked 🙂