Ez81 rectifier tube data book

Double anode rectifying tube ez81 is 6ca4 noval base rectifier diode for guitar or hifi amplifiers. Double anode rectifying tube gz34s is 5ar4 octal base rectifier diode. Jan 31, 20 the ez81 was introduced by mullard as a high current b9a rectifier, the low power rectifier offered by mullard was the 90 ma ez80. This famous brand of audio tube manufacturing, located in slovakia, europe, needs no special introduction. Capacitor input f 50 hz u tr eff 2x250 2x350 2x450 v r t 2x150 2x230 2x310. Get the best deals on 6x4 tube when you shop the largest online selection at. The maximum output current for the 6ca4 is 150ma vs. Tube 5u4g or rohre 5u4g id3352, fullwave vacuum rectifier, octal int. The 35z3 is a halfwave highvacuum rectifier designed for use in acdc receivers. Vacuum tube 6ca4 ez81, rectifier, full wave antique. The ez81 data sheet youd been looking at says you need 190. The more of a voltage drop dcv drop you have the more sag or compression you will have. I take the ez81 data sheet meaning of ra on the diagram to mean a buildout resistor added between secondary wire and rectifier socket. This is a chart showing the specifications for 5 volt rectifier tubes that can be used in guitar amps.

The type of rectifier will have very little effect on power supply sag in these amplifiers. The simplest vacuum tube, the diode, contains only two elements. I would have figured this transformer with an ez81 would put out more dc. Ill just hang on to the current one until i get it tested. They produce a similar voltage drop to 5u4 rectifiers but require only 2 amps of heaterfilament current from the power transformer as opposed to 3 amps for a 5u4. In the included material listing you have the manufacturer and part number of all the electronics components i have used. Rectifier comparison and interchangeability chart kca nos. Its job is to convert or rectify the ac voltage coming from the transformer into the high dc voltage needed by your valves in your amplifier. Jj electronic vacuum tubes, capacitors, amplifiers.

This makes them good substitutes for the other rectifier types when different output voltage is. Tube testing equipment why we dont sell certain brands filter by all 5ar4 gz34 5r4gy 5u4g 5u4gb 6ca4 ez81 gz32 gz33 gz37 nos tubes primaluna brand tubes. Vacuum tube 6ca4 ez81, rectifier, full wave miniature, heatercathode, twin. Use this form to quickly add products to your cart by part number or item id. Valve rectifiers are characterised by the sag that they introduce which is a bit like compression. Can be used in any circuit requiring a ez81 or 6ca4. May 05, 2015 my blackstar artisan 15 combo keeps blowing ht fuses after enabling standby switch. This page contains a list of rectifier tubes some of which may be obsolete. Best tube in the linestage was the vintage mullard ez81. Common valve rectifiers used in valve amps are the ez81 less commonly known as the 6ca4, the gz34 also known as the 5ar4, and the 5u4, favoured by fender. Just a little more of an aggressive distortion edge to the amp with slightly sharper highs.

Increasing the cathode bias resistor is often necessary. The tube works as expected and powers my homemade el84 stereo amplifier. A thorough inspection is performed on every component of the tube internal system before assembly. This tube will work in any ez81 or 6ca4 application. Philips, alldatasheet, datasheet, datasheet search site for electronic components and. Substitutes are given as a guide only please refer to original manufacturers data sheets to ensure that a substitute is safe and appropriate for your application. I tried one and there was only a subtle difference in tone. Rectifier comparison and interchangeability chart kca. The ez81 was introduced by mullard as a high current b9a rectifier, the low power rectifier offered by mullard was the 90 ma ez80. Vacuum tube 6ca4 ez81, jj electronics antique electronic. The jj ez81 rectifier valve is used in several smaller amps and audio systm of the 1960s. Mullard ez81 for sale in uk 18 secondhand mullard ez81.

Due to coronavirus covid19 we have limited staff working on location. The jj electronic ez81 is a noval based rectifier with a rugged construction. The rectifier valve or diode is a key part of your amplifiers power supply. Please, follow these basic instructions to place your order. Jj tubes other jj electronics tubes 6ca4 ez81 tube types. While both tubes have the same basing arrangement, the 6ca4 has higher maximum ratings than the 6v4. By having this information on a chart you can choose a rectifier tube that will best suit your playing style. This is a suitable replacement for any 6ca4 ez81 u709 fullwave rectifier tube type.

Four new ceramic 7 pin miniature tube sockets for 6aq5, 6hs6, 6x4, and more. If you would like to use this speed shop as your primary means of entering products, you may want to use our speed shop cart page. If you can contribute this data pleas email it to me. A rectifier is an electronic device that converts alternating current ac, which periodically reverses direction, to direct current dc, which flows in only one direction. Power transformer and rectifier questions the gear page. So what are the advantages and disadvantages of having the old fashioned valve rectifier versus silicon diodes. Capacitor input f 50 hz u tr eff 2x250 2x350 2x450 v r. Can i just substitute the ez81 with a solid state recifier. Ez81 datasheet pdf the thin glass tube envelope is 19 mm in diameter and, excluding the b9a base pins, is 70 mm tall. The result is a better sustaining note at the same volume as an amp with solid state power supply rectification. Dec 29, 2005 i read online somewhere that a 6v4ez80 can be used in place of a 6ca4 ez81 tube. Order jj ez81 6ca4 vacuum tubes online, in stock and ready to ship.

In the realm of miniature tubes i have settled almost exclusively on the 6ca4. My blackstar artisan 15 combo keeps blowing ht fuses after enabling standby switch. Double anode rectifying tube ez81 is 6ca4 noval base rectifier diode for guitar or hifi ampliers. Finally, the getter rings are activated, while they absorb any residual gas inside the glass envelope of the tube. Sep 05, 2015 terta 328 radio tapkoreben kulonbozo terhelesek mellett mert feszultsegek ez80 ez81 csovel, ebbol latszik az ez80 ez81 kozti kulonbseg. To view this site, you must enable javascript or upgrade to a javascriptcapable browser. The ac15 was powered by a pair of el84 tubes, an ef86driven normal channel, an ecc83driven vibtrem channel, and rectified by an ez81. Mullard blackburn 6ca4 ez81 rectifier tubes, matched pair. High output current and small size make it especially suitable for compact amplifier designs.

So, with the same output voltages, you wont notice much difference between a ez81 rectified el84 amp, and a gz34 rectified amp. Data from or other sources as supplied by john atwood. This was specified in the late 1950s and 1960s when greater power was required. Not necessarily, while the process will need to exist in the amp you may not have a tube depending on the design or you may have a solid state rectifier. If youre following rdh4s process, there is a point where the internal resistance of the rectifier is used in your calculations and they define variables differently. Ez81 rectifier valve a thorough inspection is performed on every component of the tube internal system before assembly. Rectifier tubes are the diode component within a tube amplifier that converts ac voltage from the power transformer into a dc voltage to amplify sound. Groove tubes makes a solid state plug in replacement for the ez81 that i believe is just 4 diodes. The original ez81 from mullard was the big brother to the ez80 full wave rectifier, giving 150 ma against the 90 ma for the ez80. In electronics, a vacuum tube, electron tube in north america, tube, or thermionic valve or valve in british english is a device controlling electric current through a vacuum in a sealed container. Hello i have a matched pair of mullard blackburn ez81 6ca4 rectifier tubes for sale. Jj electronic 6ca4 ez81 rectifier tubes, valves and. Valve rectifier data sheets usually state the maximum rms transformer voltage that the valve can withstand in an ordinary twophase rectifier circuit, rather than quoting limits in peak values like modern data sheets. These are an upgrade for the woo audio wa2 headphone amp.

I also had to replace the ez80 rectifier tube with an ez81 tube. Ive looked over some of the rectifier tube data sheets, but im not certain how to apply the information. The first electronic amplification of sound was done with vacuum tubes. As an example, from the philips ez81 datasheet, a 2x350v power transformer will yield 352vdc and 150ma of current using filter capacitors instead of a choke. In use the maximum reservoir capacitor would be limited to 50 f and to prevent damage by excess current an effective series resistance of 230 ohms is used. No access to a tube tester but i have a new ez81 rectifier tube ill use in its place. Nos tube specification sheet nos tube specification sheet.

Always check the bias and idle power of the tube with the new rectifier to be certain that it is running within spec. If your amp has a rectifier tube it will more than likely be called one of the following names 5y3s or 5y3gt 5ar4 5u4gb 6ca4 ez81 do i have a rectifier answer. Vacuum tube 6ca4 ez81, rectifier, full wave amplified parts. Each cad and any associated text, image or data is in no way sponsored by or affiliated with any company, organization or realworld item, product, or good it may purport to portray. In addition, when changing to a higher output rectifier in a self biasing aka cathode biased amp, eg, champ and others never assume that the power tube s isare safe. The jj ez81 6ca4 rectifier vacuum tube is a high quality rectifier that will work great as a replacement for tube amp needing an ez81 6ca4. Miniature, heatercathode, twin diode for fullwave rectifier operation. You can also see the data sheets of the electronics parts used for building this device.

This jj rectifier tube replaces 6ca4 or ez81 tube types. The original firstgeneration ac30 used a gz34 tube rectifier, three ecc83s 12ax7 for the normal channel and the tremolovibrato oscillatormodulator circuits, one ecc81 12at7 phase inverter, and el34. The part number is the sku shown for the product, the item id is a 6digit numeric unique to each item. Subj was blown after 1,5 year using in conjunction with stb switch. Lowmedium current rectifiers valve, good for preamps and low power amplifiers, very popular.

Notify me of updates to ez81 6ca4 rft rectifier tube original box site news. Jj ez81 valve rectifier this reliable solidly built rectifier valve has proven itself amongst valve amp owners. Tube ez 80 or rohre ez80 id790, fullwave vacuum rectifier, noval, b9a and powersupply shown. The gz34 data sheet quotes 5500550vrms although personally i wouldnt trust a modern production bottle to handle this. Why change the rectifier valve in your amp valve tube.

Double anode rectifying tube, ez81 datasheet, ez81 circuit, ez81 data sheet. Welcome to tubedepot javascript must be enabled to use this site. The 35z3 is a loctalbased tube compared to the octal base of the 35z5gt. Electrically the 35z3 is equivalent to the 35z5gt except that the heater of the 35z3 is not tapped for operation of a panel lamp. Rectifier tubes were some of the very first tubes to be invented since their purpose is one of the first requirements in electronic and audio design. Nos mullard ez81 u709 6ca4 nos d getter these are the best sounding ez81 made in the late 1950s early 60s with the d getter.