[Boatanchors] Biasing a 6146

[Darrell Brooks]

Since no one has replied, I’ll wade in on this. You should be okay. Both tubes operate at similar voltages and bias points. I gather from your post that there’s no fixed bias. That suggests that it’s being biased from grid leak bias. To obtain appropriate operating bias I’d expect to see a resistor in the 22k - 27K range in the grid circuit.

Darrell

On Wed, Mar 23, 2022 at 5:15 PM, Keith Densmore <ve3gem at gmail.com> wrote:

> Greetings,
> I have a homebrew transmitter that has a single 807 output tube. I am
> pondering the possibility of upping the power output a bit with a 6146(B).
> The question is, can the 6146 be biased without a low voltage negative
> supply? (Which the set does not have). Self bias? Positive bias on the
> cathode? The operating voltages in the rig are 300 and 600. Thoughts
> appreciated.
> Keith ve3ts
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