However, as we discussed earlier in this old thread, in your typical acdc radio the first audio tubes often only ran with 35, 40, or 50 volts on the plate. Vacuum tube 12av6, diode, dual triode antique electronic supply. My local supplier does not have either tube at least i could not find it in the mess he calls inventory and i am too cheap to order off of ebay. The construction has a central triode with the two. The 12av6 and 12at6 have exactly the same base and pinout, the only difference is in the gain or the mu of the tube. Replacing 35w4 and 50c5 tubes with diodes antique radio. The preferred oem tube of 50sera fender tweed champ and deluxe amplifiers the tungsol 6v6 has a geometry designed to safely handle the higher voltages used in guitar amps plus heavier plate and grid materials. The 6av6 is a miniature duplexdiode, highmu triode. The 3av6, 6av6, and 12av6 are alike except for heater ratings and heatercathode voltage ratings. Nos tube specification sheet nos tube specification sheet. The 12ax7 was originally intended as replacement for the 6sl7 family of dualtriode amplifier tubes for.
It was developed around 1946 by rca engineers in camden, new jersey, under developmental number a4522. All information is deemed reliable but not guaranteed. The cabinet was purchased for 5 euros in utrecht, holland, in a nice second hand shop. It also has many applications in radio receivers, transmitters, transceivers and audio amplifiers. The tube complement was a 35w4 rectifier tube, a 12au6 preamp tube and a 50c5 audio output tube. I originally used tube data sheets to find the typical plate currents that manufacturers cited for a particular tube. The valve came in three heater versions the 3av6 at 3. One version has a current limiting choke coil in the heater circuit. It was released for public sale under the 12ax7 identifier on september 15, 1947. The tube is quite pokey and sections can even be connected in parallel to create a power amp with enough current to drive a pair of headphones or even a guitar speaker. Triplett 3444 and 3444a tube tester instruction manuals with schematics and parts list adobe pdf files triplett 3444 instruction manualschematic. This is not 5w like the circuit suggest it is about 2w depending on the v1 tube. You can give them a try, but if you dont like a 12at7 subbed in whatever position you try, you will probably not like the 12av7.
Vacuum tube 12av6, diode, dual triode amplified parts. Hickok test instruments free manuals, tube data, and schematics. This tube is sometimes called the equivalent for 6dj8ecc88 or 6922e88cc. The 6av6 was designed for signal detection, agc detection rectification and first audio voltage amplifier in superhet radio sets. The 12av6 was commonly used as a detector and first audio amp in old fivetube table radios.
Franks electron tube pages foreign substitutes for american types this data is scanned and may contain errors caused by the ocr software. The design is an upgrade of the aaq00336at6 family and has the same pin connections and internal construction with the exception of a cathode connected screen around the cathode. The tube requires a noval ninecontact socket and may be mounted in any position. Sylvania cathode ray tube data 1 2 cathode ray tube base diagrams obsolete and seldom encountered.
Pcc88 7dj8 tubes below is our current selection of pcc88 7dj8 audio tubes. The vox showroom vox v5 vox student tube amplifier a. Pentode for rf and amplifier applications, 12ba6 datasheet, 12ba6 circuit, 12ba6 data sheet. It has much higher transconductance, and much lower dynamic plate resistance than a 12ax7. The triode section, voltage from a very small input signal.
Consequently, the maximum ratings shown on the tube type data sheets have. It is a small, sturdy, glassoctal heater cathode type used as an af power amplifier and modulator and as an af power amplifer and oscillator. In both of these circuits, the audio amplifier type 1u5 or 12av6 has a 10. Gec, alldatasheet, datasheet, datasheet search site for electronic components and semiconductors, integrated circuits, diodes, triacs, and other semiconductors. Nolan lees tube tester page military tube tester data and information. The allamerican five radio circuit if none of these tubes are familiar to you, it would be for good reason. Eico 667 tube tester best way to determine correct settings. Tube 12at6 or rohre 12at6 id2948, double diodetriode, miniatur7pinbase b7g, usa 1940 and audio frequency shown. Resistance coupled amplifier data 1lc5 1ld5 1le31e4g3c6 1lh41h5g1b8gt3a8gt 1ln51n5gt3a8gt 1l4 1s51u5 1u4 3b7 6c412au7. A centertapped heater permits operation of the tube from either a 6. Safe tube replacements chart along with recommendations. Tubes 6 a v6 3 a v6 12 a v6 duplexdiode triode 6av6 3av6 12av6 ett924 page 1 355, combined detector, amplifier, and automaticvolumecontrol tube in radio receivers. The general electric 12av6 7 pin miniature duplexdiode, highmu triode intended primarily for use as a combined detector, amplifier and automatic volume control tube in radio receivers. The 6146w vacuum tube is a ruggedized military version of the 6146 family of tubes.
For more information on pcc88 7dj8 vacuum tubes including pinouts, ratings, application and possible substitutions visit pcc88 in radio museum and pcc88 7dj8 in duncan amps. The 12av6 combines a high mu triode and two independent diode units in the 7 pin miniature. This chart shows an example of how toset up voltageamplifyingpentodes for maximum voltage output as opposed to maximum gain the. Key data and drawings are shown below, or you can download the 12ax7 datasheet in pdf format. The family consisted of four variants of heater voltage. 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. The 12av6 combines a high mu triode and two independent diode units in the 7pin miniature. A centre tapped heater permits operation of the tube from a 6. E80cf7643 amperex pq telefunken 6bl8 substitute the e80cf is a special quality mediummu triodepentode. The information contained on this website is for information only.
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