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Old 2nd November 2019, 08:13 PM   #1
Mungo Park is offline Mungo Park  Canada
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Default se power transformer/tube selection

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
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Old 4th November 2019, 04:31 PM   #2
Tubelab_com is offline Tubelab_com  United States
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Quote:
I have a transformer producing the following:
375 0 375 Volts 150mA
5V 3A
6.3V 5A
That's not suitable for a TSE. It will produce 430 to 450 volts of B+. There is no 300B on the planet that will live long at that voltage. It's also well above the ratings for all the electrolytics on the parts list.

I use transformers like that in the SSE and when feeding two KT88's the B+ is 440 or so with a tube rectifier, and 460+ with solid state.

You need something in the 320 - 0 - 320 volt range.

That choke will work fine.
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Old 5th November 2019, 10:24 PM   #3
Mungo Park is offline Mungo Park  Canada
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Thanks for your help.
Cheers Ron
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