$26.95 Buy It Now or Best Offer
free,30-Day Returns
Seller Store jimcochran
(1114) 100.0%,
Location: Miami, Florida
Ships to: US,
Item: 305842640270
Return shipping will be paid by:Seller
All returns accepted:Returns Accepted
Item must be returned within:30 Days
Refund will be given as:Money Back
Amperex:Amperex
Status:TV-7 Tested
Type:6883B 8032A 8552 Vacuum Tubes
6883B 8032A 8552:6883B 8032A 8552
MPN:6883B 8032A 8552
Country/Region of Manufacture:Netherlands
Unit Quantity:2
Application:Audio Amps & Radio Transmitters
Two(2) Calibrated TV7D/U Tested Gm&mA 1968&1970 AMPEREX Heerlen, Holland production “6883B 8032A 8552” Tubes 12.6V-13.5V version of the 6146/A/B (6.3V heater/filament) Beam Power Output Tubes – Ham Radio/SSB Finals or Modulator-Exciter Tubes- 25 watt dissipation – Note that this tube type has 3 different #’s for the exact same tube typewhere you will see usually etched in glass “6883B / 8032A / 8552” or “6883B”or “8032” or “8552” etched in glass on the tube. All #’s are the same tube type.- Only ONE original Very Large GE “6883B 8032A 8552” box inked, both tubeswill be safely packed in this large box with its original factory dampening material. -Both with Seamed top glass-Both Thoriated ‘thorium’ Black Plates-Both with Clean Pins, Top Cap, Metal Base, solid locator guide (see pics)-Both with black inked factory Amperex Tube types & Date Code on metal base -Both identical internal Construction – We have written the test results and numbered each tube on the glasswith removable black Sharpee pen. Removable with water/glass cleaner and paper towel/napkin if desired. – You will receive a printed copy of this detailed description and full test results in the box shipped. Condition/providence: Plug-in and play condition. 1 found in GE box and 1 Found out of box, We have purchased several Very Large Military/Industrial Surplus tube lots recently and found a couple dozen of this tube type in these lots. Most were found out of original boxes but tested factory ‘bogey’or close and strong. TV7D/U Test Results: NO Shorts, NO Gas, NO Leakage, No Apparent Microphonics detectedReferences: Min Good Gm reading on a TV7 Gm = 35 = 4,375.0 uMhos Transconductance (65% tube life)Manufacturers Data Sheet ‘Bogey’ is when tested at 200VDC Plate Supply & 200VDC ScreenGrid#2Class A1 AF Amplifier ‘Bogey’ = Transconductance(Gm)=7,000 uMhos at 100mA plate current emissions Tube marked #15: (Sept 1968 Amperex branded for for GE ‘MDY1’ ‘Δ8I’ -Gm=83%/mA=84%)tan ink on glass “General Electric” “Made in Holland” “6883B 8032A 8552” “69-07” Gm=46.2/35 =5,775.0 uMhos at 84.1mA Plate Current Emissions Tube marked #16: (Aug.1970 Amperex ‘MDY2’ ‘Δ0H’ -Gm=88%/mA=90%) orange ink on glass “Amperex” “Made in Holland” “6883B 8032A 8552” “69-07” Gm=49.3/35 =6,162.5 uMhos at 90.1mA Plate Current Emissions Our Test Bench : TV7D/U Restored, Enhanced & Upgraded( Digital Meter andsolid state bridge) Dan Nelson Calibrated( 07/24/2023). Calibration re-verified on 01/06/2024 & on 6/03/2024.Our TV7D/U reads Transconductance(Gm) on a scale of 0-120 (push button #3, for rectifiers button #7). This TV7D/U will read mA plate current emissions directly by depressing Gm button and the red button on the digital meter, We use the last publishedxls spreadsheet by Nolan Lee to transpose actual TV7 digital meter readings 0-120into actual Transconductance(Gm) #’s in uMhos based upon the selector switch setting A-F.All versions of TV7’s and most Hickok designed tube testers will test tubes at a maximum of 150V Plate Volts and Grid #2 at 130V volts and Control Grid #1 (Bias control) at ranges from 0 to -30Volts. WE PACK VERY WELL AND SHIP FAST TO OVER 100 COUNTRIES WORLDWIDEMANY Years of Experience shipping fragile electronics, speakers and Vacuum Tubes. US Shipping to All 50 States & US Territories + APO/DPO/FPO/xPO & PO Boxes International via eBay International Shipping Center – low cost space available Air-Freightwith fullTracking, Insured Guarantted Delivery. Ebay’s international ship partners are USPS International, DHL & Asendia.Allow 10-days to up to 6-weeks for delivery depending upon country of destination.IF YOUR COUNTRY IS LISTED IN THE DROP DOWN BOX IN THE ‘SHIPPING, HANDELING’ TABTHEN WE SHIP TO YOU.
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