Here is what the catalog shows for the Variac I ordered. I guess it will be handy to have around once this project is done. I don't know what for, but "never say never" in the world of ham radio.
https://www.amazon.com/gp/product/B086SWLL1L/ref=ppx_yo_dt_b_asin_title_...
...continues at https://www.99hobbies.com/what-about-the-tubes
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