813 Tube

813, Beam Power Amplifier Vacuum Tube | Amplified Parts

www.amplifiedparts.com

The 813 is a general-purpose transmitting beam power tube of the thoriated-tungsten filament type designed for use as an rf power amplifier and oscillator as well as an af power amplifier and modulator. Also known by US military identifier VT-144. Note: brands may vary. Photo is for reference only and may not exactly represent final product received. ... Note: These new-old-stock vacuum tube specifications are provided as informational only, and in no way guarantee the brand or exact functionality of the vacuum tube you receive. General-purpose transmitting beam power tube of the thoriated-tungsten filament type designed for use as an rf power amplifier and oscillator as well as an af power amplifier and modulator.

813 Beam Power Tube and Data Sheets

www.frostburg.edu

The 813 followed on the heels of the famous 6L6 beam power tube, which was the first power tube to use the electron beam principle. The 6L6 was released in 1936 and was first announced on page 50 of the May, 1936 issue of QST magazine. The 6L6 revolutionized power tube design by forming the electrons into beams and using aligned control and screen grids to limit grid and screen currents. Forming the electrons into beams increased the space charge near the plate, which then repelled secondary electrons back to the plate, eliminating the need for a surpressor grid. See the digram below. Other beam tubes eventually followed, including the 813, 2E26, 6146, 5763, and 6V6. Although a pair of 813s was perfect for legal limit operation on CW and AM, the tube was unable to supply the high peak inputs permitted in single sideband operation, and thus the popularity of the tube dropped as SSB became the preferred mode over AM.

CE Distribution T-813 Vacuum Tube - 813, Beam Power Amplifier ...

www.opentip.com

CED CE Distribution T 813 Vacuum Tube 813 Beam Power Amplifier P15859123CED-T-813 https://cdnimages.opentip.com/full/CED/CED-T-813.jpg CE Distribution T 813 Vacuum Tube 813 Beam Power Amplifier Manufacturer Part Number: T-813New-Old-Stock (NOS) tube.The 813 is a general-purpose transmitting beam power tube of the thoriated-tungsten filament type designed for use as an rf power amplifier and oscillator as well as an af power amplifier and modulator.Also known by US military identifier VT-144.Note: brands may vary. CE Distribution T-24JE6C_24LQ6 Vacuum Tube - 24JE6C / 24LQ6, Beam... ... Manufacturer Part Number: T-813 New-Old-Stock (NOS) tube. The 813 is a general-purpose transmitting beam power tube of the thoriated-tungsten filament type designed for use as an rf power amplifier and oscillator as well as an af power amplifier and modulator. Photo is for reference only and may not exactly represent final product received.SKU:T-813Item ID:008057Type:AmplifierMeasurements and Specs: No measurements are currently available for this product. Please if you have any questions. Packaging InformationPackaging Dimensions3.8 in. × 3.8 in. × 10 in. Weight (Packaging)0.7496 lbs. NOS Tube Specification SheetAll Models 15859123 0.9000lbs 0.00 0.00 0.00 Unlike those wholesale to public membership clubs, we do not charge any membership fee. Some merchants offer FREE shipping, but when you buy quantity 10, you pay 10 times total. Essentially, you are paying 10 times on shipping. We don't think that is fair to you.

Shuguang Vacuum Tube 813 For Tube Amplifier Replace FU13 High Power ...

iwistao.com

Shuguang Vacuum Tube 813 For Tube Amplifier Replace FU13 High Power Output HIFI Audio Tube 813 belongs to antique one, which is a direct thermal beam shot tetrode with thorium tungsten cathode, graphite anode. In the radio equipment, it can be used for the oscillator power amplifier tubes, and its using frequencies Final shipping rate is subject to actual checkout. 2.The shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound. 3.If you have any questions about the shipping rate, pleas don't be hesitate to contact us through the ways as below. ... Tube 813 belongs to antique one, which is a direct thermal beam shot tetrode with thorium tungsten cathode, graphite anode. When it is used as a power amplifier (such as Class AB), its output power is up to 300W or above, it is high reliable, excellent linearity, and not only does it perform tigers’ roaring and thunder exhaustive, but also can perform thin piano voice with detailed and delicate, it is the master of tube amplifier. 813 sound is very good, power and life are outstanding, air sense and sound field is far better than with that cannot be compared, you may not want to listen to small power output tube after listening tube 813. For faster shipping and smooth transaction, we will change the shipping company among them · C. Economy Shipping: China Air Post Mail / Parcel, Hongkong Air Post Mail / Parcel, or shipment by sea etc ... You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

813.pdf

frank.pocnet.net

813 / GM70 amplifier with Bartolucci transformers

www.audiodesignguide.com

I never will create an amplifier with these tubes because there are no benefits to use these, only the cost is lower but there is no impact on the total budget because the transformers are the main cost of a vacuum tube amplifier. Tubes like the 805 · , 808 and 304TL also if used with strong drivers are less linear of 845, GM70 and 813 so it is necessary use feedback. This amplifier have enough power (about 25w) and low output impedance (near to 1ohm) to drive any kind of loudspeakers like full range, low efficiency with 2 or 3 ways and also any electrostatic. The max power is the measurement result increasing the output level until the distortion spectrum decay is perfect but this amplifier will support larger peaks in less linear area. I suggest this project only to person with some experience with vacuum tubes amplifier because it use very high voltage so it is necessary be care and use only good wire for the internal cabling. BEWARE! This is an expert-only project because the high power supply voltage, about 1KV. Be careful, it can kill you! Keep always one hand (better if it is the left hand) behind your back. ... 813 (FU-13) output tubes. The 813 is a general-purpose transmitting beam power tube with thoriated-tungsten filament with a maximum plate dissipation of 125 watts. Follows the photo with all these tubes, starting on the left there is the GM70 with copper plate, 813 RCA and the FU-13 Shuguang with metal plate.