The american government specification vt233 is a double diode triode sharing a common cathode and the commercial type designation is 6sr7. The thin metal tube envelope is 23 mm in diameter and, excluding the io base pins, is 81. Vacuum tube 6l7, heptode antique electronic supply. The whole point of the 6l7 is to ensure maximum isolation between oscillator and. Colonial model 652 5tube broadcast shortwave superhet radio service data sheet march 1935 radiocraft. This 1932 rca below manual provides all the data sheet information, of the first radio receiving tubes ever made, from about 1920 to 1932. At the time philips had already developed and patented power pentode designs, which were rapidly replacing power triodes due to their greater efficiency. From a pricing vantage point other than the one time purchase of the adapters there is a big difference in price for the tubes. Numbers shown in light blue background are coldcathode tubes.
This triple sectioned valve was designed for superhet am receivers. 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. Shes short on cash and they seem to be a bit on the pricey side. Uhf triode for grounded gtid amplifier use up to 500 mc.
This tube is not a direct 6bg6 clone, it is an octal modification of g807 tube, which one was soviet clone of famous 807. Pair heathkit cotswold speakers 3 way fane system 12 base. The kt88 is a tougher 6l6, something like two in parallel. The series combination of resistor r41 and the oscillator control tube grid to cathode capacitance is also in parallel. Free vacuum tube data sheets free vacuum tube substitution. Mixer tube designed for service with a separate oscillator as the first detector in superheterodyne. The beam tetrode design of the 6l6 allowed rca to circumvent philips pentode patent. Data from or other sources as supplied by john atwood. Oct 24, 2011 6cs7 mediummu twin triode tube vt6cs7 6cs7 twin triode tube, new old stock, boxed. The s indicates that it is a single ended valve ie no top cap. The 6l7 construction minimizes the space charge coupling between oscillator input and signal input grids and results in a mixer tube.
Thanks to frank philipse for supplying the above pdf datasheet. A surplus reseller catched my eye offering the 6p7s tube for peanuts. Nos tube specification sheet nos tube specification sheet. Im gonna try to determine what value this mystery resistor should be based on the tube data but any guesses are welcome.
The obvious differences are the pinouts loctal vs octal. But i dont have a clue as to how they would perform as compared to the standard type. Recent listings manufacturer directory get instant. Discussion in amps and cabs started by straticus, feb 18, 2009. New, enlarged, and uptodate booklet contains classification chart.
Free vacuum tube data sheets free vacuum tube substitution guide manuals free radio tube data manuals free tube base diagrams. I was wondering if there is another tube that can be substituted for the 6eu7 that is less expensive with out having to do any mods to the amp. For additional data and curves, see types 6ttj and 6a6, and the resistancecoupled amplifier chart. A few specialquality tubes did not have a standard equivalent, e. I am working on scanning and placing on this page the entire rca hb3 tube manual. Identical to type 6as7g except for use of a t 12 envelope. The signal is supplied to the first control grid and the oscillator is fed in on a second control grid, a screen grid separating the two. In reading schade,1 every tube amateur should see what a masterpiece the 6l6 was in tube history and to my knowledge there is no solidstate fourterminal equivalent. A friend of mine would like to re tube her gibson falcon. Fundamental properties of vacuum tubes 1 2 3 4 5 6 7 8 9 10 11 12. From a pricing vantage point other than the one time purchase of. The thin metal tube envelope is 23 mm in diameter and, excluding the io base pins, is 81 mm tall. Id1o20b rca interchangeability directory this interchangeability directory of industrial.
Probably some tube manufacturer thought it would be a better idea building them that way instead of a single cathode in the middle of two grids and plates. I learned the 807 was a similar tube and both belong to the 6l6 family. Another spot to look, which is especially useful if youre looking for replacement types and tubes with similar bases or characteristics, is the nj7p tube database. I was wondering if there is another tube that can be substituted for the 6eu7 that is less expensive with out having to do any. Tube 6r7 or rohre 6r7 id2984, double diodetriode, octal int. For many years now i have been scanning and posting radio service data sheets like this one featuring the colonial model 652, 5 tube broadcast shortwave superheterodyne radio receiver for many years now.
Ive been looking at the resistor under magnification and the first two bands are definitely brn blk. Service data the various diagrams of this booklet contain such information as will be needed to isolate causes for defective operation when such develops. With almost datasheets and the visitor counter indicates over 4000. As of 3505, i have finished scanning the general section, receiving tubes part 1, receiving tubes part 2, miscellaneous, specialpurpose receivingtype tubes, thyratron, ignitron, and glowdischarge tubes, and most of the transmitting tubes, as well as all. The 6n24p double triode is designed for amplification of highfrequency voltage in cascade circuits of radio equipment of wide use. For this reason, it was used where the manufacturer wanted a high tube count or wanted to cover higher shortwave frequencies than converters could handle. The 6p7s output beam power tetrode is designed for operation in line scanning output stages of tv receivers. Since i am still fairly new to tube building i am surprised that so few components need to be changed when doubling up tubes. It has many circuit diagrams, using these tubes and all the information, about these original vacuum tubes. January 1939 radiocraft table of contents wax nostalgic about and learn from the history of early electronics. Etc, alldatasheet, datasheet, datasheet search site for electronic components and semiconductors. The plate circuit df the rca67 oscillator control tube is caused to ac. In addition to the data i have scanned and posted, if youre looking for data on a particular tube you should visit tsdl on duncanamps website, or franks tube data.
Double triode, 6h8c datasheet, 6h8c circuit, 6h8c data sheet. Twin beam power tube tor use with low voltage power supplies. If this checks out as ok, ill start to put together a shopping list for the rest of the project components. The basic research i have done between the 2 tubes using tube data sheets and they seem to indicate very similar characteristics. If the page is blank click here rca 6fq7 6cg7 datasheet. The whole point of the 6l7 is to ensure maximum isolation between oscillator and signal, and to provide a mixer which is efficient at vhf where stable oscillation would require a separate vhf oscillator triode. Antique radio forums view topic question on 6sg7 tube.
But the 6lw6, 6lf6, or even the 30w 6je6 the mc3500 output tube behave like tougher kt88s. Tube data should, therefore, be checked before replacing a type to be replaced in column 2 with a similar rca type in column 6. This is a list of vacuum tubes or thermionic valves, and lowpressure gasfilled tubes. A flat sheet beam is electrostatically deflected across the anode which is. The ratings are the same as the older 6r7 with a top cap. Easily select individual manual pages and print out. The 9 is a highvacuum cathoderay tube utilizing the allmetal construction and having a fluorescent viewing screen approxi mately one inch in diameter. In its day, it was considered a normal triode with somewhat different curves from the 6j5. Service data the various diagrams of this booklet contain such information as will be needed to isolate causes. Also i have halved the value and doubled up the output tube grid resistors. I can only see a spec of what i think was the third band. The 6l7 is in the ge tube manual and it is a rather unusual tube in that it is pentagrid but not a converter it is a mixer designed for use with a separate oscillator. Two 6n7 s or 6n7 gs can be operated in a class b output stage with the two triode units of each tube connected in parallel to give a power output of 20.
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