Mullard valve codes

MULLARD ECCWITH SQUARE GETTER AND LONG-PLATES (17MM). Any additional information on this subject, especially the engineering codes is most welcome. It would be fascinating to know what the improvements were made as the code. Hitachi, Japan Electrical and Musical Industries. Markings vary but the various types of mark are described below.

There are some photos of the various mark types here.

Mullard supply) Philips, Eindhoven. The codes marked on a valve are made up as follows: (a) The CV number (b) The broad arrow (Government mark) (c) The date code. The second letter follows the usual coding, i. Southfields, London, was founded by. Read and understand the codes. The codes are written in two lines on standard tubes and in two rows on special tubes (as E88CC) on the glass close to the base.

Finding the code could be very easy, but occasionally it’s quite challenging. This high impedance amplifier triode was designed specifically for audio use and has a high amplification factor of 100. Formed from ‘The Great British Valve Project’ we have used the expertise of many engineers who have provided us with their preferred list of thermionic tubes.

An miniature indirectly heated twin triode. Each triode is a separate unit, the heaters being the only common connection. As a result it is possible to use each unit for different. All have matching date codes and Blackburn B factory codes.

The stamp is very similar to the chalky paint that tube manufacturers use and as such, it is removable if rubbed with sufficient force. Find great deals on eBay for mullard valve. Hificollective uses cookies to give you the best online experiences. By continuing to use our website you are agreeing to our use of cookies.

The booklet appears to have been intended primarily for home constructors (the aim was clearly to sell valves). They sound very nice in SE amps and in also push pull mode. See my favourite ELamps in my equipment! This is a glass valve , if there is a metal version, it will not have a second figure group no 8. K7: Vari-mu indirectly heated RF pentode in metal outer shell - active elements: shell, heater, cathode, g g g anode. Provide a comprehensive manual of data to enable the cards to be accurately replicated.

Design, build and fabricate a jig to enable blanks cards to be punched. Shipping fees only $per tube. Looking for that rare power valve ? Mix - 12AX- Do different preamp tubes make a sonic difference?

KTquad GEC Boxed tested on Taylor Valve tester as new. Date Codes QC-Z xPD-and RA-Z. U4G = UBoxed new old stock. GZNew Boxed (30GBP) Image. WELCOME TO YET ANOTHER GREAT DR-TRON AUCTION.

THIS SALE IS FOR VINTAGE VALVE TUBES.