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I am collecting the parts for my first SE build, being a newbe I have some questions. I have been given an older SE board from a friend and will use that. I have a transformer producing the following:
375 0 375 Volts 150mA
5V 3A
6.3V 5A

I was wanting to use this transformer, any opinions if this will work with 300B tubes.
I also have a Triad choke:
Current 200mA
6 Henries
150 ohms
Could I also use this choke.

From reading up on this forum 300B tubes seem to be popular and thought this would be a good choice to use. What sort of brand is good dollar value 300B’s.
I have not figured out which Rectifier tube or OP Transformers yet, thinking something Edcore brand.

Cheers Ron