Eight (8) TV7D/U Re-Tested 5x RCA 807 2x NU 807 1x SyL 807 Tubes

Description: *** Eight(8) TV7D/U RE-TESTED Vacuum Tubes **** *** $139.00 div 8 = unit cost $17.50 ea +shipping*** Eight(8) TV7D/U Re-Tested 807 Vacuum Tubs 5x RCA 807 in factory RCA 807 boxes. Production dates 1945,1955, 2x1957, 1960 2x NU-National Union 1x807 1953, 1x VT-100A JAN-CNU-807 dated 'G3' (late 40's to early 1950s) (no box) 1x Sylvania 'W' 807 dated 'EL' 1950's (no box) Condition/Providence: We Opened the boxes and RE-Tested all 8 tubes after cleaning the pins for Transconductance(Gm) in uMhos & mA plate current emissions, The RCA tubes were found in the original boxes from a Large military Surplus lot we purchases several months ago along with many other 807 wrapped in original dampening material ("2 of excelsior cushioning ) and many 811/A power tubes and other interesting Mil-Spec JAN vintage transmitting tubes. These 8 are in plug-in and play condition. TV7D/U Test results BELOW and shown in pics. - All 8 with Black Thoriated Thorium coated plates/Tungsten-heater - 6 of 8 with double bottom'D' 'D' getters, 1 of 8 with double bottom sextagonal metal strips, and 1 of 8 (RCA 'V2') with Rectangle Metal mirror side getter. - All 8 with brown Micanol/phenolic bases You will receive a printed copy of this full detailed description including test results in the box shipped. Each tube is marked 1 through 8 on top glass lightly in removable black Sharpee on the top glass to correspond to the test results below. We have also marked the sides of the glass with the TV7 meter# and mA test results. Note: All TV7 versions test at a maximum of 150VDC Plate Supply volts, 135VDC Grid #2 Volts and Control Grid #1 (Bias Setting) of Zero(0) to -35VDC. TV7D/U Test Results: No Shorts, No Leakage, No Gas, No apparent Micro-phonics 'Bogey' references: RCA Data Sheet for 807 Tube (ca. Nov. 1954) change dot to a period ',' in the link below frank dot pocnet dot net/sheets/084/8/807 dot pdf (please preview the graphs in the RCA 807 Data sheet for verification) TV7 Minimum Good meter reads 48 = 2,400 uMhos Transconductance(Gm) TV7 settings: 8076.3V FR3-0240Bias=33Shunt=nill-Sel=CGmButton=3MinGood=48Cap connects to plate.TB 11-6625-274-12/1 w/ C3 Tube 1 : RCA 807 ('5-12' DD getter 1955) 75.1/ 48 = 3,755.0 uMhos(Gm) at 26.8 mA Plate Current Emissions Tube 2 : RCA 807 ('60-26' DD Getter 1960) 77.7/ 48 = 3,885.0 uMhos(Gm) at 26.7 mA Plate Current Emissions Tube 3 : RCA 807 ( etched 'CBA' '57-30' DD Getter 1957) 66.7/ 48 = 3,335.0 uMhos(Gm) at 21.5 mA Plate Current Emissions Tube 4 : RCA 807 ( etched 'CBA' '57-30' DD Getter 1957 ) 75.2 / 48 = 3,750.0 uMhos(Gm) at 25.9 mA Plate Current Emissions Tube 5 : RCA Radiotron 807 ('V2' = 1945 w/US Military contract markings and etched in base 'D↑D' , 'V2' in circle and 'AD 539' in rectangle box . 'D↑D' Getter 68.1 / 48 = 3,405.0 uMhos(Gm) at 28.3 mA Plate Current Emissions Tube 6 : Sylvania 807 'W' "EL" yellow lettering (1950s) 62.7 / 48 = 3,135.0 uMhos(Gm) at 24.9 mA Plate Current Emissions Tube 7 : National Union NU 807 '53 48' (1953) 71.1 / 48 = 3,555.0 uMhos(Gm) at 21.0 mA Plate Current Emissions Tube 8 : National Union 'JAN-CNU VT-100-A 807' 'G5' (early 1950s) 72.2 / 48 = 3,610.0 uMhos(Gm) at 23.9 mA Plate Current Emissions Our Test Bench : Recent 7/24/2023 Dan Nelson Restored, Upgraded & Calibrated Mil-Spec TV7D/U Tube Tester with Digital Meter and solid state bridge reading Transconductance (Gm) in uMhos and Anode Plate Current Emissions in mA. Calibration reverified 01/06/24 and on 06/03/2024. We use Nolan Lee's last published spreadsheet to translate TV7 meter reading (0-120) into actual uMhos Transconductance(Gm) #'s. Our Digital meter reads mA Emissions directly by pressing both Button3(Gm button)in combination with the RED button on the digital meter (as seen in pics). WE PACK VERY WELL AND SHIP FAST WORLDWIDE TO OVER 100 COUNTRIES ONE Box 11"x 8"x 6" weight 2lbs 12oz. ****WE COMBINE SHIPPING ON MUTIPLE ORDERS**** WE SHIP TO ALL 50 USA STATES + PO BOX +APO/FPO SHIPPING LOW COST USPS Ground ADVANTAGE (USPS 1ST CLASS) We Pack Well and Ship Fast with many years of shipping FRAGILE Vintage Electronics and Vacuum Tubes US: -All 50 states: Low cost USPS Advantage Ground shipping with Tracking, allow 2-6 days for delivery depending upon your delivery zone, We Ship from South Florida. International Shipping : Insured with FULL-Tracking guaranteed delivery via Low-Cost eBay International Shipping Center economy small parcel consolidated Air-Freight Space Available, allow 10-40 days for delivery depending upon country of destination. (example : last similar tube shipment to Australia near Sidney NSW we delivered in 16days. *** If eBay International shipping does not show as a shipping options then select USPS International 1st Class as shipping and will ship eBay international which is less usually $2-$4 less in shipping cost per package. We will then issue you a $rebate on shipping (what you paid - actual shipping cost via eBay Intl) the day your funds clear. Please note some Country shipping restrictions currently apply, if your Country is in the Drop-down box under the Shipping Tab then "WE SHIP!". NO A/I descriptions used here, just honest communications, Thank you for looking!

Price: 139 USD

Location: Miami, Florida

End Time: 2024-12-23T17:32:33.000Z

Shipping Cost: N/A USD