I reproduce below an unedited testimonal from someone who bought 2 of these early brimar 6060 and two mullard m8162 which is mullards uprated 12at7 in 1998 and did a back to back test and then emailed me his opinion. Sometimes swapping to a highgain 12ax7 does fit the bill for certain sounds, but in many situations you can actually find improvements. The photograph above shows a jar of barium carbonate and pure nickel ingotsthe essential ingredients required to make a tube well not so much alchemy as chemistry, and physics too, and, even worse, maths. If you could take a clear sidelong photo, that would help immensely. Manuals data sheets catalogs rca, ge, gec, tungsol, sylvania, mullard, osram, amperex, brimar, telefunken, stc, eico, tv7 tester, dynajet tester 75 years of western electric tube manufacturing magers 70 years of radio tubes and valves stokes history of the british radio valve to 1940 thrower theory of thermionic vacuum tubes. In the book, which takes place between 1834 and 1836, dana gives a vivid account of the life of a common sailor at sea as it really is. British vintage wireless society 2004 for the editions of modern wireless we hold please click the link 2007 for the editions of mullard outlook we hold please click the link 2005 for the editions of popular wireless we hold please click the link 2001 gardener, c. Im pushing the preamp about halfway, but the master volume is roughly at 75%.
Mullardphilips tube designation news newspapers books scholar jstor february 2012 learn how and when to remove this template message. Williamson to tube audio, and to provide information to users and diy constructors of the features, advantages and disadvantages of this amplifier. Search the history of over 418 billion web pages on the internet. Great savings free delivery collection on many items brimar vintage vacuum tubes tubes for sale ebay. In the early 1960s stc spun off brimar to thornaei radio valves and. The first part, of format numberletternumber is the date code where the first number signifies production week of month, the following letter signifies the. Both test as very strong, tv7 test 100102 and 104102 were 5050 is good or 65%. However, we are still currently accepting and shipping online orders, email, and phone inquiries. Get the best deals on brimar vintage nos tubes sockets when you shop the largest online selection at. A lot of players feel that a highergain 12ax7 in their first preamp position must be a good thing, equating more gain with more goodness.
Tube depot carries a selection of 12ax7 ecc83 7025 cv4004 pre amp vacuum tubes. With the rolloff of really good brimar tubes, the dared plugged into my little solid state amp sounded virtually identical to my amps with tripath or abletec class d modules, only a little better in some ways. For example, an mov x63 valve was the same as an rca 6a8 tube. Rare brimar england 6sn7gt 6sn7 test nos matched tube pair.
Brimar cv403312at7 nos tubes two tubes in a matched pair pristine. The 6l6 first appeared before the second world war, and was widely used in many applications, especially in audio amplifier, finding particular favour in guitar amplifiers. The more original functions, packaging, and output a given tube provides, the greater its value among collectors. Very rare are those tubes still sealed in their boxes with even the cellophane wrap intact. This book contains data on all mullard radio and television valves and includes equivalent substitution. Rod world tube company amperex bugle boy these vacuum tubes are used in high end guitar amplifiers and audio gear, acdc radio equipment and in many diversified applications such a multivibrators or oscillators in industrial control devices.
We have added a shopping cart for easier ordering and an improved search feature. These first clips were recorded with the amp plugged into a torpedo cabm set to a fanes 2x12. More electron tubes can be found in the tube store collection of new old stock nos if you are looking for a tube shop carrying the very best tubes for your amplifier, youve come to the right place. The telefunken 12ax7 also has a very long life span and will outlive all cheaper 12ax7s by a mile. Brimar, ediswan mazda, gecgenelex, and tungsram all made vacuum tubes in gt. Etsy is the home to thousands of handmade, vintage, and oneofakind products and gifts related to your search. This page is dedicated to the williamson amplifier, which is regarded by audiophiles as one of the great moments in audio history its intent is to present a tribute to the contribution of mr. History archives brimar thermionic products official site. The partial white print on the glass reads cv2975 kb ad missing on one tube. It is difficult to tell from the photo, but the mica hole brings brimar to mind. Stc brimar was a uk subsidiary of the american giant itt international telephone and telegraph.
Brimar tubes were used frequently within the english military for several decades. The 6av6 is a miniature repackaging with just a single cathode of the triode and twin diodes from the octal 6sq7 a doublediode triode used in am radios, which itself is very similar to the older type 75 triodediode dating from 1930. Clearly shows the operating conditions for all brimar valves. Well, we did mullard last week so this time, lets look at the brimar type and date codes, oft seen on valve envelopes in minuscule inked print, but what do they mean. Unfollow brimar 12au7 to stop getting updates on your ebay feed. With the very large number of vacuum tubes or thermionic valves that were produced and as a result of the multiple vacuum tube numbering systems that were in use, there are generally equivalents for most types of tube. Stcbrimar was a uk subsidiary of the american giant itt international telephone and telegraph. In history, there was a period when such tubes were well available, and it was simply nice business to replace the solid gold tips by gold plated brass. Yo peeps, today we are going to look at the retma valve numbering system.
Due to the covid19 virus outbreak, the state of illinois has ordered all nonessential business to close, through april 30th. Dave is also a regular contributor to guitar player and vintage guitar magazines. As such, these tubes boast quality to match the severity of their. Mullard tubes and valves of all kinds we have largest supply of mullard tubes in the world. In 1930, when somebody did that on a box with 100 pcs, even when it took him the whole day, the result was 400 little gold pieces. Buy brimar vintage vacuum tubes tubes and get the best deals at the lowest prices on ebay. Tube books, manuals, data sheets, more 19321990s best. However, information about this period of their industrial history is scarce.
Locate the tubes or merchandise you want on my webpages, and note the price 2. Brimar treasury of disney classics story books in a. A collection of a century of photos, history and stories from the central valley and sierra nevada. The tricky thing comes when youve got tubes that were sold during the cold war. Now, at the close of their brilliant life, this book presents a collection of valuable research data, and developments in production and applications, contributed to. Most modern guitar amps call for tubes that were only made by mullard or brimar, if theyre truly of british origin. If you arent sure about which valve you need, or what tubes you can substitute, let us help you. Shop from the worlds largest selection and best deals for stc nos tubes.
The british radio and valve manufacturers association bva was when. I replaced a set of electro harmonix 12ax7eh tubes with these. Tubes that lack this rolloff e80cc, for instance, are often said to sound solid state or are called transistors in a bottle. Special quality tubes were sometimes identified by placing the numerical part of the designation between the heater rating and the tube type. Login brimarbrimar brimar assorted luxury trimmings. It was developed around 1946 by rca engineers in camden, new jersey, under developmental number a4522. Deep shiny chrome gettering typical of the 50s brimar british made tubes. Brimar, which stood for british manufactured american radio valves, used all american designations. Behold, the hitone lowatt sap combo, featuring their 231 speaker, nos caps, and nos brimar 6v6gt power tubes. Contact us or drop us line, we have limited quanitities of limited tubes. Get the best deal for brimar vintage nos tubes sockets from the largest online selection at. Tube depot carries a selection of 12bh7 pre amp vacuum tubes.
The history of the 2a3 triode by rob harris the 2a3 was one of the most popular tubes of the 1930s and is perhaps the most frequently used output triode of all time. Amounts shown in italicized text are for items listed in currency other than singapore dollars and are approximate conversions to singapore dollars based upon bloombergs conversion rates. They have gray plates with copper grid posts and halo getters with dual supports. The mullard fakes are usually late vintage brimar made tubes that have been relabeled as early shield logo or bva logo mullards. The history, in particular, is one of the best and most memorable i have ever read. The rare 1960s brimar cv2975 tubes in this precisely matched pair are military spec el84 6bq5 type tubes. Today it is used more exclusively in hifi products and is noted for offering exceptional linearity and sound quality. As ever with these things, they inevitable take longer to appear than you want. Vacuum tubes valves audio radio repair guides, rca ge vintage. It was released for public sale under the 12ax7 identifier on september 15, 1947. Their research laboratory and manufacturing plant was based in footscray, kent. Shop from the worlds largest selection and best deals for brimar vintage nos tubes tubes. What makes tubes more than an unusual sort of travel book, is blums.
This cartel dictated among other things, the price of valves vacuum tubes and how they were numbered. It turns out all those mind numblingly boring subjects my teachers worked so hard to drum into me during my school. Large halo getter with black anodes and copper supports. Brimar codes come in two parts separated by a forward slash. Data for soviet tubes can be found the same way as the other tubes. The first part, of format numberletternumber is the date code where the first number s. Unfollow 12au7 brimar to stop getting updates on your ebay feed. Treasury of disney classics story books in a musical box up for your consideration is a treasury of disney classics story books in a musical box new in the box. Brimar 6sn7gt 6sn7 ecc33 black glass tube, tested, nosnib. We specialize in newoldstock tubes and offer high quality tubes, sockets, capacitors, and other parts. Stcbrimar was a uk subsidiary of the american giant itt international. Thanks to patrik schindler the datasheets again have improved accessibility.
No matter what youre looking for or where you are in the world, our global marketplace of sellers can help you find unique and affordable options. The genuine nasty old stuff telefunken and mullards usually have some of the label smudged, smeared, missing or blotchy. Brimar electronics was formed to allow thorns scientists and engineers the opportunity for developing some of their ideas. As with mullard, much more information can be found about stcs valves tubes usually branded brimar, although this was sold to thorn in 1960 than about their transistors. Shipping within the usa is primarily by us postal service, which i have found to be consistently faster and safer than either ups or fed ex. The 12ax7 is basically two of the triodes from a 6av6 a double diode triode. The 12ax7 was originally intended as replacement for the 6sl7 family of dualtriode amplifier tubes for. To expedite your order, please read the following suggestions. Tubes are matched for both current draw ma and transconductance gm. The simplest vacuum tube, the diode, contains only two elements. Valve data cdrom contents uk vintage radio service data. Buy brimar vintage nos tubes tubes and get the best deals at the lowest prices on ebay. Be the first to know about new products and offers. Do you remember me this is a specialized store to sale hifi tubes in auction and buy it now options.