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    Building DIY Vacuum tubes

    Dear hevans1944, Thank you for helping out ! Yes, I would agree with you on the DC702, DC704, DC705 diffusion pump oil availability in the market and their price tags. Anyway, I am going to try that out in my diffusion pump (I found from scrap yard), using PMX-200 (poly-dimethyl-siloxane)...
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    Building DIY Vacuum tubes

    I am not sure whether anyone could help out, hope this thread is still active
  3. D

    Building DIY Vacuum tubes

    Hi , i know that you mentioned about the diffusion pump oil used in the setup. DC704 diffusion pump oil. Polyphenyl-ether oil (oxidation gas resistant). hydrocarbon oil. I know these well known oil are best suited for diffusion pump oil depending on applications. The vapour pressure of the...
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