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JAN 5670W (2C51)GENOSVacuum TubeBlack PlatesHalo Disc GetterSilver Shield
These will test 100% or more
on a calibrated TV-7D/U tube tester
Avg. Min. (65%) TV-7 chart & Avg. New (100%) =26/26 & 40/40
*We use the following testers:
*Dan Nelson calibrated TV-7D/U with sweep tube adapters, & digital meter with plate current test at 150V.
*Paul Hart calibrated/modified Westmore 501 (Triplett 3444)
* B&K 747B calibrated
Test results may differ between various testers for many reasons such as technical design, aging components, etc. So while test results are a good indication of quality there can be some difference between the many differently designed & maintained testers.
The following definitions are mine as I use them.
\'Balanced\'refers to comparing the gm test results between the lowest to the highest identical sections ofa single tube. Within 3% I consider to be\'Balanced\'
\'Matched\'refers to comparing the gm test results between the lowest to the highest of the identical sections of a set of tubes. \'Matched\'I consider to be within 10%. Some call similar \'Gold Matched\'
\'Closely Matched\'I consider to be within about 5%.Some call similar \'Platinum Matched\'
\'Tightly Matched\'I consider to be within 2%.
*For Multiple item purchases click the \"Add to Cart\" selection for each item
*After all items have been added to your cart click on \"Request Total From Seller\"
*An invoice will be returned with the correct \'combined shipping\' & total duewhen I next check my account
*If your purchase is not fully satisfactory please contact me .
- International customers welcome: Please do not ask for false value on the customs form
- For combined international shipping you need to send an email listing the items you want to buy and I will create a single listing for all the itemsthat you can buywith the corrected shipping charge
*Tubes will be shipped in a cardboard box with packing, usually bubble wrap or sheet foam
Packed for protection
Packed for ease in unpacking
*Tubes will generally be cleaned
Clean tubes will radiate heat better & operate cooler
*Pins will generally be straightened/cleaned as needed
Cleaned pins make better electronic connection
*Most tubes are shipped in their boxes (or replacement boxes)
I often repair a box so it will function properly
*I try to get your package in the next mail after receiving your order.
