Tio Pedro wrote:
"ken scharf" wrote in message
.. .
To Hijack an old thread...

The way tubes were numbered sometimes....
The 25L6 and 50L6 are NOT 6L6's with different heater voltages.
Actually both of these tubes are IDENTICAL with the 6W6GT except for the
heater ratings.

Ken, isn't the 6W6 a high perveance tube, hence the relatively high
filament current? If so, it might work well in a TX with slightly
lower plate volages. I have a sleeve or two of those looking for
a project...

Pete


Based on what I found on google for 'high perveance' I guess so.
This tube has a max plate voltage rating of 330v, and a max G2 rating of
165 volts. It was used as an AF output tube in low plate voltage
radios, and in TV sets as a vertical output tube.

The 6Y6 is a similar tube, with 50ma more heater current and the same
plate dissipation rating in a larger bulb. It can handle higher plate
current than the 6W6, and it's max plate voltage and G2 rating is 200v.

I know that 50c5's and 50l6's were used in transmitter projects, so the
6W6 will work in the same circuits. The 6Y6 might bear looking into as
well.