$59.95 Buy It Now or Best Offer
free,30-Day Returns
Seller Store jimcochran
(1114) 100.0%,
Location: Miami, Florida
Ships to: US,
Item: 305868291990
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
SYLVANIA:SYLVANIA
Type:Vacuum Tube
Custom Bundle:No
Mid-1940’s VT-229 Sylvania JAN-CHS-6SL7GT:Mid-1940’s VT-229 Sylvania JAN-CHS-6SL7GT
MPN:VT-229 JAN-CHS-6SL7GT
Country/Region of Manufacture:United States
Unit Quantity:2
Modified Item:No
TWO(2) Vacuum Tubes / Valves( UK ) / Rohren( DE ) / Lamps( EEU ) Recent Dan Nelson Calibrated TV7D/U Tested TWO(2) Matched Mid-1940’s with Balanced PlatesSylvania VT-229 JAN-CHS-6SL7GT Tubes – Full Test results below and in pics listed- No boxes, will pack very well for safe domestic & International shipping. Physical Characteristics:- The VT-229 is a Hi-Mu 70/70 (Amplification factor)- and is the Predecessor to the 12AX7 tube)- Twin/Double TRIODE Vf: 6.3 If: 0.3 Ampere Vacuum Tubes- Silver Inked on Black Micanol base “Sylvania VT-229 JAN-CHS-6SL7GT “- Date codes : Military Contract inked Mid-1940’s “SC 966A ” – Offset Black Rolled Latter Plates with Two(2) Holes per Plate- Heavy Bottom Silver flashing around Getter just above micanol black bases- Bottom Side “D” Horseshoe Getter, very difficult to see with so much silver flashingon getter side. Condition: TV7 RE-Tested against factory data sheet (dated 1954 Sylvania 6SL7WGT = VT229 tube).All TV7 versions test at a max of 150VDC Plate Supply Voltage and 135Volts on the Screen supply voltagewith Control Grid#1 (Bias) from 0 to -35Volts. Both tubes strong with Balanced plates. Clean Pins and locator, plug in a play condition. You will receive a printed copy of this full description with Test results in the box shipped. Test results : NO Shorts, No Leakage, No Gas, No Apparent Micro-Phonics detected For Reference: TV7 Tested at Plate Supply Voltage 150Volts VDC(Factory average new for a Single tube in Class A1 Amplifier circuit(given in spec data sheet)TV7 Meter reading of =48/48 =1,200/1,200 uMhos at 1.4/1.4 mA)TV7 Minimum good Gm = 32/32 = 800/800 uMhos Gm Tube 1 (Top Spacer inside glass is black inked ’10’ ):( 3% plate match) Plate 1: 44.2 = 1,105.0 uMhos Transconductance (Gm) at 6.1 mA (Ia =Anode Plate Current emissions) Plate 2: 45.6 = 1,140.0 uMhos Transconductance (Gm) at 6.5 mA (Ia =Anode Plate Current emissions) Tube 2: (Top Spacer inside glass is black inked ‘R-7’ ) (Very Close Plate match at .99368% with exact mA match) Plate 1: 47.2 = 1,180.0 uMhos Transconductance (Gm) at 6.7 mA (Ia =Anode Plate Current emissions) Plate 2: 47.5 = 1,187.5 uMhos Transconductance (Gm) at 6.7 mA (Ia =Anode Plate Current emissions) Three ‘Bogey’ values are given in the data sheets : Average NOS Factory when new – listed in all 5 Factory Data sheets from manufacturers Hygrade-Sylvania/RCA/Tung-Sol/GE/RFT/ for the 6SL7GT tube type states : ( Common References list : tested at 250VDC Plate Supply, S = 1,6 mA/V Ia = 2.3 mA ).** See the Data Sheet Specs in Pics **Typical Factory New NOS characteristics for ‘ – Class A1 Audio Amplifier’ (The Sylvania-Hytron JAN 6SL7WGT/VT229 Data sheet is closest in characteristics to these tubes for sale)Tested at Plate Voltage 150Volts : Gm Transconductance = TV7=48/48 =1,200/1,200 uMhos at 1.4/1.4 mA Anode Plate Current.Tested at Plate Voltage 250Volts : Gm Transconductance = TV7=64/64=1,600/1,600 uMhos at 2.3/2.3 mA Anode Plate Current.Tested at Plate Voltage 275Volts : Gm Transconductance = TV7=80/80=2,000/2,000 uMhos at 3.0/3.0 mA Anode Plate Current. *** WE COMBINE SHIPPING on Multiple Tube Purchases which SAVES $ on Shipping Costs WE PACK VERY WELL AND SHIP VERY FAST (within one day or same day) USA Ship : All 50 States and Territories, ALL PO Boxes( APO,DPO,FPO,xPO boxes we ship!)low cost USPS 1-Class (now called USPS Ground Advantage however box goes Air-Freight Space Availablemany times if distance is far from South Florida at same low cost) International : Via Ebay “Improved” International Economy Space-Available Air-FreightLow cost International shipping via eBay International Economy small package Service space available AIR-FREIGHTInsured, Guaranteed Delivery.(Allow 10 days to 5weeks for delivery depending upon which World region box is delivered to). North America’s and Europe are fast( 8-15 days)ASIA 2nd fastest. Austrialia /NZ / Pacific Islands about 3weeks delivery. Notes : Shipping International Delivery Times have improved, Last 2 boxes shipped to Australia(Melbourne & Sidney)15 -17 days delivered from Miami postal drop
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