Hello all, id like to introduce a new style amp that ive just built, a 10 watt 6aq5 power section with a tmb preamp. I am running the plates pretty hot, max on the data sheet is 250v and i am at around 270. Data sheet says keep the supply voltage down around 250 volts, otherwise treat them like a 6v6. Because of a different pinout a 9pin base versus 7pin base than an 6aq5el90.
The 6p1 is similar to el90, 6aq5, but has a 9pin base, not 7. This spiffy little amplifier uses a pushpull design featuring a pair of 6aq5 beam power tubes driven by a 6j6 dual triode, all of which are 7 pin miniature tubes. As configured in the 6x2 receiver, the actual output is 4w, much larger than the 12w typical of communications receivers. It has many circuit diagrams, using these tubes and all the information, about these original vacuum tubes. The 6bq5s the power output tubes are still easy to obtain, with many different brands to choose from. The 6aq5 was designed as a cheap seats version of the 6v6. Following the 6aq5 datasheet i was hoping for around 2watts total at this voltage. That means when you apply the fudge factor you can run em on 300 volts. All tubes new, military equipment and have otk mark. Tube 6aq5 or rohre 6aq5 id2118, beam power tube, miniatur7pinbase b7g, usa 1940 and poweroutput shown.
A centertapped heater permits operation of the tube from either a 6. Because of a different pinout a 9pin base versus 7pin base than an 6aq5el90, it cannot be used as a plugin replacement for these types. The aa8v 6x2 superheterodyne receiver audio power amplifier. Following the introduction in july 1936 of the 6l6, the potential of the. Oct 18, 2012 hello all, id like to introduce a new style amp that ive just built, a 10 watt 6aq5 power section with a tmb preamp.
The 6146 beam power tube and its various descendents 6146a, 6146b was and still is one of the most popular transmitting tubes in amateur radio service. The result better mids and bottom while keeping the smooth top of the classic 6v6s. It does cleans well, rolls into classic marshall crunch too. This cute little 40 meter cw transmitter is nothing more than a 6aq5 oscillator coupled to the antenna. Single ended audiophile tube output 16271642 series tube audio singleended classic tube output ultralinear over designed for highfidelity, single ended, classa. The target voltage should be between 90 and 5 volts. Ive selected a hammond 261c6 power transformer which puts out 250v c.
Except for heater ratings, the 5aq5 is identical to the 6aq5. Im basically working on a champ clone, but using a 6aq5 tube rather than a 6v6. May 23, 20 a centertapped heater permits operation of the tube from either a 6. Then i got bold and checked the 6v6 and 6aq5 data sheets. Do not exceed that limit for very long, or youll wear out your tube. But what this data shows is that, except at very high plate voltages, the tube peak performance points are all below the 12w limit. The maximum plate voltage rating for the 6aq5 is 275 vdc. That means if you want to experiment you can use a cheapo valve junior pt or equivalent. Fender 5f1 sparking power tube telecaster guitar forum. This 1932 rca below manual provides all the data sheet information, of the first radio receiving tubes ever made, from about 1920 to 1932. Gec, alldatasheet, datasheet, datasheet search site for electronic components and semiconductors, integrated circuits, diodes, triacs, and other semiconductors. Please see the substitutes at the top of the page for more details. 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. A homebrew transmitter from the 1960s, updated for today.
A beam power tube, it is capable of an output of 4. There are however plate voltage limitations on the basic 6v66v6gt, the basic 6aq5, and the 6005 of 250v. Free vacuum tube data sheets free vacuum tube substitution. The 6aq5 mullardphilips tube designation el90 is a miniature 7pin b7g audio power output beam tetrode vacuum tube with ratings virtually identical to the 6v6 at 250 v. Bold designators are close or identical, italic designators are different ratings, different pinouts or different filament voltages. Because of a different pinout a 9pin base versus 7pin base than an 6aq5 el90. That era of friendly local am gatherings on 3828 khz and 29. Single ended audiophile tube output 16271642 series tube audio singleended classic tube output ultralinear over designed for highfidelity, single ended, classa, tube output, grain. They deliver about 2w in triode mode, or, about 5w in pentode mode. The 6146 series of tubes followed on the heels heels of the famous 6l6 beam power tube, which was the first power tube to use the electron beam principle.
It is the amp that i designed after my popular squirrel monkey one tube amp. Ah, an opportunity to point to the original 6v6 tube data sheets. Roughly if a 6bq5 will work you can make a 6aq5 work at that circuit. The howler monkey push pull 6aq5 guitar amp c 2012, g. If you cant find what you need here, try duncans tube data sheet locator. The 6aq5 is the miniature version of the popular 6v6 octal tube. It was commonly used as an output audio amplifier in tube tvs and radios. Hallicrafters ha5 vfo which, with its 6aq5 output tube could drive the transmitter better than other vfo types, am contacts were regularly made from 80 through 10 meters. A homebrew transmitter from the 1960s, updated for todays.
Here youll find manufacturers data sheets and curves for many popular and some not so popular electronic valve types. First time i arced a tube at the socket, it was a 6aq5. Power output is on the order of 6 watts with 275 vdc on the plate and a crystal with good activity. Pentode for af power amplifier applications, 6bq5 datasheet, 6bq5 circuit, 6bq5 data sheet. There are versions of this tube with extended ratings for industrial application which are designated as 6aq5a with controlled heater warmup. The 1943, 1949 and 1959 sylvania tube manuals online. Tube 6aq5a or rohre 6aq5a id4581, beam power tube, miniatur7pinbase b7g, usa 1940 and poweroutput shown. It is still in use in audio applications, especially electric guitar amplifiers. So on a 6af6g eye tube circuit such as the one found in a stromberg carlson 420l, the control voltage comes from the screen of the if tube. Pentode for rf and amplifier applications, 12ba6 datasheet, 12ba6 circuit, 12ba6 data sheet. All information is deemed reliable but not guaranteed. Click here or on the image above for a larger version. The 6l6 was released in 1936 and was first announced on page 50 of the may, 1936 issue of qst magazine.