The 6U8A is a triode pentode by designation but is constructed as a beam tetrode. The 6U8A differs from the 6U8 mainly in the fact that the heating time is tightly controlled. The design …

Tube 6U8A or Röhre 6U8A ID3986, Triode-Pentode, Noval, 9 pin miniature (USA pico-9) B9A and Universal shown. Radio tubes are valves.

Apr 2, 2013 · 美国型号还是国产，美国的有 和国产6F2基本一样。 不过国产的6U8没听说过，有也是变频用的管子！ 参数与国产6F2大致相同，可查阅“电子管6F2参数”即可。 另搜索本坛本版 …

The 6U8 is a triode pentode from 1954. 6U8 is the American designation and ECF82 would be the Mullard type designation if the two were exactly identical. In ECF82 Mullard put both …

The regeneration control provides a variable voltage to the 6U8A pentode's screen grid, it is used to keep the detector circuit just at or slightly below the point of RF oscillation. The regeneration …

Title: 6U8A Author: Tung-Sol Subject: FP-2004-06-19 Created Date: 6/20/2004 12:45:57 AM

Dec 10, 2011 · Minor difference in 6U8A related to heater warmup time and really only applicable if used in a series string filament arraignment like found in later TV's Roll either one and you …

共にテレビやFMチューナーの周波数変換用途が主ですが 6U8 のほうが電極間容量が少なく、より高周波向きです。 又、プレート損失も7割ほど大きくなっています。 又、6U8 6BL8 共に …

Dec 9, 2020 · 1970年，13-28 kHz 6U8A型单电子管VLF接收器. 五十年前的这个月，《科学与电子》（Science and Electronics）于1970年12月发行，展示了如何制造这种调谐范围为13-28 …

Dec 9, 2020 · Fifty years ago this month, the December 1970 issue of Science and Electronics showed how to make this one tube VLF receiver with a tuning range of 13-28 kHz. The set …

Oct 19, 2018 · I've tried 6U8A RCA, but ECF82 Polam goes much better. Those Polish Tube Valves sounds better in overall, but there is a annoying problem with vocal sibilance …

Thankfully, there is a solution by implementing a simple wiring change and substituting the plentiful (for now) and otherwise identical sounding NOS 6U8A tube in place of the 7199. Due …

This project extends my 6U8A Vacuum Tube Audio Amp V2 by adding a 6C4 preamp stage for higher sensitivity. The preamp allows the circuit to be used as a low-power guitar amp, a …

Name: 6U8A Use: Miniature type used as combined oscillator and mixer tube in color and black-and-white television receivers utilizing an intermediate frequency in the order of 40 MHz. …

View results and find tube 6u8a datasheets and circuit and application notes in pdf format.

Mar 5, 2017 · I'm having some 6U8A tubes laying around and wonder what I should do with them. As one half is a pentode similar to an EF86 and the other half is a low power triode, I'm …

This listing is for a Pair (2) of 6U8A 6U8 triode pentode [adapts to 7199] vacuum tubes in the standard tube shape. They have a B9A 9-pin base, black or grey plate, and top or bottom …

Jul 10, 2024 · You could use the triode section of the 6U8A as the voltage amplifier/input stage. Triode wire the 6U8A pentode section and configure that as a cathode follower. Connect the …

This listing is for a Pair (2) of 6U8A 6U8 triode pentode [adapts to 7199] vacuum tubes in the standard tube shape. They have a B9A 9-pin base, black or grey plate, and top or bottom …

New Old Stock 6U8A Vacuum Tube (Item: RDW-256) $6.00 $4.80. Add to Compare. Add to Wishlist. Add To Cart. Current Top Sellers. New Old Stock 6U8A Vacuum Tube (Item: RDW …