DATE CODES FOR RCA-MADE TUBES Ludwell Sibley There is a sort of fascination with the date codes that are found on tubes. The Open Date-code System for American made Vacuum Tubes. In the back of "Tube Lore" by Ludwell Sibley is RCA's two letter code vacuum tube products 781 ... meaningless codes by tube ... so 88-37 was united-electronics internal numbering system and did not signify any manufacturing date. GUITAR TONE IS ROCKET SCIENCE!Vintage, high voltage, vacuum tube technology harnessed to create radical effects pedals! Buy Now! RCA 6AS7G Vintage Vacuum Tube Black Plates Top Getter (Test 81%) ... 2 RCA 6AS7G Chrome Top Tubes. Date Codes: 3-26 & 66-22. RCA Vintage Valves ans Vacuum Tubes. ... WWII Radar RCA VCR139A 10E/466 Tube Valve, ... 8122 RCA MADE IN USA NEW AND UNUSED BEAM POWER TUBE 1975 DATE CODES. 120.00. Shop from the world's largest selection and best deals for RCA Vacuum Tube. I am trying to locate a legend for the two letter date codes on GE tubes. This was all written up in an issue of Tube ... GE date codes on tubes. This is a list of vacuum tubes or thermionic valves, ... for example, the RCA Receiving Tube Manuals. Tube Sockets, Tube Accessories, Vacuum Tubes, Sweep Tubes, Tubes, 1L6, Admiral 1L6. During the war Colossus was instrumental in breaking German codes. ... the Vacuum Tube, Ziff ... on design and application of vacuum tubes. Most audiophiles are concerned with date codes and, to a lesser extent, the factory code. This high vacuum and high temperature melting process is one of RCAs new ... Vintage Tube Services. Vacuum tubes & equipment reviews. ... 3 thoughts on Deciphering European tube date codes ... samleung on RCA Victor 12au7/ECC82 Black Plates D-getter 1949; Shop for rca radio tube on Etsy, ... RCA 6CZ5 black plate vacuum tube ... matching date codes LeedsRadio. 5 out of 5 stars (371) $ 25.00. Back to TV Repair FAQ Table of Contents. CRT Basics Note: Most of the information on TV and monitor CRT construction, operation, interference and other problems. 20,000,000 Visitors and counting - fix my hit counter and earn credit$, LOL: We salute our Nations military, past and present. IN WONDERFUL ALBANY, NY, USA Google is compensated by these merchants. Payment is one of several factors used to rank these results. Tax and shipping costs are estimates. The search result of the keyword are currently scheduled on Public Training Schedule View and Download Ford Super Duty owner's manual online. 2013. Super Duty Automobile pdf manual download. 5751 Tubes . Vintage 5751 tubes from USA and Europe. These are a slightly lower gain tube that can be used as a replacement for. the 12AX7. RCA Date Codes... Are there any websites out there that have dating info for RCA ... Somewhere in the process there were also two-letter date codes." Philips Vacuum Tube Codes Datasheet Index ... (6009) 9th week of 1960 is the date in white marking. Amperex is still using the old box logo in 1960. 2A3 by RCA branded Cunningham. Dated R5 for 1940, black plates and dimpled foil bottom getter. Power Triode vacuum tube The Tube Shop - Supplier of Vacuum Tubes. ... RCA 12AX7 RCA NOS LONG BLACK ... 3 pairs with matching date & production codes. $65 per pair . RCA 6AS7G Vintage Vacuum Tube Black Plates Top Getter (Test 81%) ... 2 RCA 6AS7G Chrome Top Tubes. Date Codes: 3-26 & Matched Pair (2) NOS RCA 12AX7A ECC83 12AX7 Vacuum Tubes Same Date Codes - CAD $101.51. Beautiful Matched Pair (2) of new old stock RCA 12AX7A/ECC83 vacuum RCA Army/Navy 6AC7 VT112 Tubes - Matching Date Codes - Lot of 10 ... Vintage RCA 6AC7/VT-112 Vacuum Tube ALL NEW IN THE BOX Tube Date Codes? General. Z-Fest. I have also seen one that breaks down some of the letter codes - either RCA or ... Tube RCA tube boxes changed style when their logo changed from the circle-RCA to ... RCA logos and boxes. I am not sure about the date codes