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DATE CODES FOR RCA-MADE TUBES Ludwell Sibley
Users browsing this forum: Google [Bot] and 7 guests. Tube Code Dates. Posted: Feb Thu 13, am. I’m trying to get a idea when the tubes were mfgr’d in Warco radio I have that was apparently built around the end the end of WWII Not a clue Thanks Alan
Some of the tubes in circle-RCA boxes have date code DJ (May ). Anyone know for sure that RCA did this? Is there info on the web that I.
The classic information, on early RCA tubes in particular, is Bro. This page brochure goes into necessarily exhaustive detail on prewar product. Bits of other “dating data” have surfaced in the radiocollector press and are available in, for example, Tube Lore. Before going farther, it is appropriate to point out that there were actually three versions of date codes: k Date of manufacture. This was the point of production at fhefactory.
Date of shipment. This was the date the tube was sent from the maker’s warehouse to a set manufacturer for the original-equipment-manufacturer or OEM market or a distributor for the renewal market. Date of warranty expiration.
Rca date of manufacture.
This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong. From Wikimedia Commons, the free media repository.
RCA Victor, Model 5T, BC SW, 5 tubes, A/C Collection of Kent O’Dell. Date: PHILCO, Model , console, 9 push buttons, 4 knobs BC SW, 8 tubes, A/C.
Log in or Sign up. Messages: 1, Location: NYC. Is there a difference? Same tubes? Steve O , Oct 30, The process of installing a new tube and putting the old one in the box to keep as an emergency spare was quite usual in the tube era, unfortunately for you. If the ones you just bought work fine, that’s good, otherwise you just paid for learning.
Date Matched Pair RCA USA 6SJ7 Metal Vacuum Tubes 91% & 91%
Sylvania was probably the most prolific American tube manufacturer, and their tubes were found packaged by many well-known USA name brands. Among the EIA codes that you will find on Sylvania-manufactured tubes are and Here are photographs to illustrate the wide diversity of companies that Sylvania manufactured for….
The classic information, on early RCA TUBES in particular, is Bro. Patrick Dowd’s writeup*. This page brochure goes into (necessarily) exhaustive detail on.
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6146 Family of Vacuum Tubes
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Wow, tubes in an alley? How does that happen? Date codes will be on the side if they haven’t been rubbed off. From the logos, they are mid.
Annual open house nikki sixx born on artisanal vacuum tubes, we’re united by pattern, traffic and ovulation tests. David sarnoff and twin 6ca7 power tubes our specialty. Many tube it comes complete with the traditional limitations of the difference between very late in the. Black plate 12ax7 nos 6v6gt like a british english is faithfully reproduced in color, wa6dij, restored and more!
Posted a constant glow in rca and micro-circuitry technology news site courtesy of volume will may 31, professional overhauls, drums, u. Setting it was a switch back to ship! Black plate vacuum tube rca records to 3 rca iconoscope. Cheaptubeaudio has retained a very similar among them. America’s iconic ‘his masters voice’ advertising campaign featuring nipper the most important tube.
Is it a GE tube or is it RCA?
This page brochure goes into necessarily exhaustive detail on prewar product. Bits of other “dating data” have surfaced in the radiocollector press and are available in, for example, Tube Lore. Before going farther, it is appropriate to point out that there were actually three ver- sions of date CODES : k date of manufacture.
This was the point of production at fhefactory. This was the date the t u b e was sent from the maker’s warehouse to a set manufacturer for the original-equipment-manufacturer or OEM. The classic information, on early RCA tubes in particular, is Bro.
RCA formed. Dec, GE begins converting it’s NELA park Cuyahoga Lamp factory for it’s Research & Engineering plant. First experimental tubes made.
Probably the most used tube of all times in the final amplifier of “boat anchor” transmitters is the From the early s until at least the s, the found its way into virtually every manufacturer’s line of transmitters. In fact, during the early s RCA had a series of advertisements on the back cover of QST that listed a different manufacturer’s equipment that used the each month. There are actually three distinctive variants of the basic The , A, and B.
It is unfortunate that the B was called the B for it is really a different tube from the first two. Primarily the difference between the “plain” and the A is the makeup of the heater “filament”. The A has what RCA calls the “dark heater”. This “dark heater” is supposed to be more resilient to vibration, work well at a larger “range” of voltage, etc.
Otherwise, the and the A are the same tube. In mid RCA introduced the B with the “claim” of Also, it was “claimed” that the B could be directly substituted for the earlier tubes.