GE 211 Single-Ended Power Amplifier with Tango Transformers
Archived listing from the original vintage-amplifier.com. Prices, seller details and purchase links have been removed; this page is a reference record, and nothing here is for sale. About this archive.
Power Amp using GE 211 tube made from all HIRATA TANGO transformer. You can change tube to 845 just by making some small modification. The pair of OPT FW-150-10SR weight about 15kg and cause the amplifier weight about 35kg. All of parts are high grade ones with professional wiring. 100% handmade, no board was used in this amp. The sound is very powerful and speedy, it is perfect for both jazz and classical. HIrata Tango MS-UVD, FW-150-10SR, MC-10-200D was used in this amp.
I'm using it in my system as reference device and there is no problem, sound is perfect, you can easily change GE 211 tube to 845 tube, you can also modify amplifier to be able to use with both 211 and 845 tube. I will upload inside picture later and you can see which part was used in this amp. Amplifier was manufactured for Japan so its AC electric volt is 100-110V 50/60Hz
Tube used in amp is:
General Electric GE-211, VT-4C
12BH7A x 2
12AX7(ECC83) x 2
About this model
A Japanese hand-built single-ended amplifier around the 211, a large directly heated transmitting triode, here a General Electric 211/VT-4C. Every transformer is Hirata Tango: MS-UVD, FW-150-10SR output transformers and an MC-10-200D choke. The output transformers alone weigh about 15 kilograms and the whole amplifier about 35. Drivers are 12BH7A and 12AX7 tubes, the wiring is point to point, and the amplifier was built for Japan's 100–110 volt mains.
The seller notes it can be modified to take the 845, a related transmitting triode. Both need high plate voltages and serious grid drive, so the changes are not trivial; the single-ended guide explains why.
| Builder | Hand-built, Japan (listing) |
|---|---|
| Type | Single-ended triode power amplifier |
| Output tube | GE 211 / VT-4C (listing) |
| Drivers | 2 × 12BH7A, 2 × 12AX7 (listing) |
| Transformers | Hirata Tango MS-UVD, FW-150-10SR, MC-10-200D (listing) |
| Weight | About 35 kg (listing) |
Questions collectors ask
Can a 211 amplifier use an 845 instead?
The archived seller says yes with some modification. The two are related transmitting triodes, but operating conditions differ, so it needs a qualified technician.
What is a 211 tube?
A large directly heated triode designed for transmitters and also used in single-ended audio amplifiers, here in a General Electric VT-4C version.
Sources: Wikipedia: Single-ended triode.
