All tubes come with a full 30 day, unconditional, no questions asked, money back satisfaction guarantee!

Test scores will average 85% to 90% of NOS values.

Individual test scores will be written on the new boxes that you receive with your tubes.

You are purchasing a "Gold Grade" tube . This means that the plates are very tightly matched on a calibrated Hickok TV-7 or 799 within 10%  

Please see our other listings for "Silver, Platinum and Platinum Plus" tubes. Silver Grade tubes are matched within 15%, Platinum Grade tubes within 5% and Platinum Plus 1%.

The Gold and Platinum tubes are recommended for more critical applications such as your preamp and phono stage.

Please email with any questions and/or concerns.

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