2012年6月14日 · The 6B5 was apparently a six-pin dual-triode tube which is internally-coupled, with all biasing done internally. It is both input and output triode in one envelope, running about 7K load resistance and putting out 4 watts SE.

2025年2月25日 · The 6B5 tube runs with zero bias, so no cathode resistor or parallel capacitor is needed. Substituting 42 for type 6B5 in most cases simply requires the addition of those two parts to provide bias for the tube and it will operate.

2012年9月12日 · 6B5 is an uncommon indirect-heating vacuum tube in the 'positive-grid' valve family. 6N6 and 6CA5 have similar characteristics. These valves were frequently used for record players and radios...

2024年10月3日 · Let’s build a dynamically coupled amplifier. No need to reinvent the wheel. Take a glance at the link below and you’ll see this idea was around in 1935. this 6B5 tube was developed to give us value in power out and fidelity (6N6 is another option). Best of all it contains both triodes needed!

2022年3月22日 · Here is a schematic of the first trial circuit that I've breadboarded. The 27s and 6N6Gs are AC-heated, all in parallel, using 0.56R/25W dropping resistors downstream of the 6N6Gs to get 2.5V for the 27s. The 27s are currently running at about 172Vp, 11.5Vk, or ~160Vpk @ 5.75mA. Rectifier is actually a 5R4GY. The B+ is about 323V.

Acoustic Labyrinths--"6B5" Amplifiers-Now-the "Infinite Baffle" How to Make Money in the P. A. Field-Novel Loudspeaker Installations - www.americanradiohistory.com..... .....

2021年3月8日 · Many of the small triodes meant as vertical Oscillators are the basis of quite a few very good amplifiers up to 5-6 watts. Worth a look. The 843 is best used as a Class AB2 RF amplifier, or a Class C RF oscillator.

I have a 6B5 6-pin tube that I want to test but I can't find it in my EICO tube test book. My test book shows a 6B4, 6, & 8 but no 5. Does anyone know wh…

2007年11月7日 · Sylvania 6B5 is a heater type output tube comprising two triode units mounted in an ST-14 bulb. The smaller or input section acts as a driver tube for the larger output unit and is directly coupled to it.

2022年3月25日 · I've never paid more than ~$25 for a NOS 6N6G and have, on occasion, found them for under $10. I have a 45 SET amp, a very popular design that was developed by Gordon Rankin called the Bugle. It sounds really nice but the …