Marconi USA Type 7558 Beam Power Pentode Vacuum Tube-Used-Tested

Description: eBay Template 1 RADEONUT'S ELECTRONICS STORE or anything that may come my way VACUUM TUBE DEPARTMENT Vacuum tube type 7558 Beam power pentode for RF or AF amplification Used, tested good (see below) BRAND: Marconi ORIGIN: USA MEASURED Gm (µMho): 5000 Average Gm specified by Hickok for the 750 tester: 6000 Percentage: 83% Stock #125750 NOTE REGARDING TUBE IMAGES: Used-tested tubes are of various brands and of various origins, most often from Canada or U.S.A. Images shown of quantities of used tubes are only a general representation of a typical tube or tubes of a particular type, as this used inventory is ever-changing. Images shown for a single tube will be the actual tube listed for sale, IF there is only one available. Otherwise if there are quantities it is a general representation of the tube type Where my images show a quantity of used tubes, price is PER TUBE unless specified otherwise. NOTE REGARDING MY TESTING OF TUBES: All tubes which I sell, whether NOS or used, are tested either on a calibrated Hickok 750 mutual conductance tester, or, a calibrated Canadian Marconi MU-101 (which is a military upgraded Stark 9-66, Hickok designed) Before testing a used tube type, I will, whenever possible, test one or two NOS versions of the tube to create a benchmark value against which the used tube will be compared. This will ensure the validity of the test results on the particular tester I use. Percentage Gm if shown is the actual measured Gm compared to the average Gm published in the tester's roll chart. Except in rare cases, (which I will specify), I do not sell tubes which measure less than 70% of the average Gm for the tube type. In addition, all tubes are checked for heater-cathode leakage. If even a minute amount of leakage exists, the tube is discarded. The buyer is to be aware that their own tube tester may show different transconductance results than mine. All tubes I sell, whether Used or New Old Stock will function properly under normal conditions. SHIPPING-PACKAGING: NOS tubes are shipped in their original boxes, unless the box is badly damaged or the tube is bulk boxed. Otherwise, all tubes, used or new-old-stock will be shipped safely in white or tan boxes, or re-used boxes, never loose. See further shipping notes below. I will gladly combine ship to save you money! Please contact me for a quote to ship more than one item. I SHIP TO CANADA, U.S.A. AND WORLDWIDE eBay has negotiated special low rates with the major carriers (Canada Post, FedEx, UPS) so that all shipments will now include tracking and insurance-this protects both you and I. Any applicable taxes or duties for foreign shipments is the responsibility of the winning bidder / purchaser A nominal handling charge is built in to the shipping cost to cover my cost for good quality and safe packaging. I most certainly do not like to hear that items have been damaged in transit. Although handling is out of my control after leaving my premises, I do my best to pack as safely as possible to minimize the possibility of damage. GUARANTEES: All items sold leave my premises in exactly the condition as described and shown in the photographs. Parts and components which I sell are either "New-Old-Stock (NOS)" or tested pulls and are described as such. All are guaranteed to work for 30 days under normal use. RETURNS: As most of my listings may be for one-of-a-kinds, discontinued items, NOS or used items, returns are not generally accepted. If there is a problem with the item you received, please contact me first, to discuss our options. I will be as flexible as possible, and your satisfaction is guaranteed - see my feedback - I am very proud of it! GENERAL: Please ask questions before bidding/buying I aim to be as accurate as possible when describing the items I wish to sell. However, I am not an expert about many of these items. Thank you for considering the purchase of this item! With best regards, from "Radeonut" "eBaying" since 2000!

Price: 9.95 CAD

Location: Toronto, Ontario Canada

End Time: 2024-11-28T17:58:27.000Z

Shipping Cost: N/A CAD