TECHNICAL HIGHLIGHTS 技術特點
This Data sheet. is about the 274A and 274B, which only difference is the tube base. These tubes are a full wave rectifiers of a special kind, and electrically equivalent to the original Western Electric historical tubes. Our tubes feature a series connected filament for both diodes together. The series connection makes the middle of the filaments to be virtually grounded, when using a filament supply winding with a center tap. This tube is can supply 140mA with a normal C-L-C filter.
The 274A and 274B are designed specially for Audio purposes, and is optimized for use with a small size first capacitor. With this tube, you will have only normal rectification current flowing in the rectifier circuit, and no heavy current spikes. This will result in less hum radiation into of the preamplifier, an improved sound compared to low impedance rectifier tubes for industry applications, or solid state rectifiers. Also the 274 is specially suited for applications with relatively high DC voltage. The new ceramic sockets we use, are a good help for this, since these give no leakage, and do not age under high voltage.
Made In Czech
Price : HKD 3600.00 / pc
Features
- Soft rubber suspended tube base
- Hard metal Construction (Note1)
- Extra large getters
- Hand blown Glass bulb
- These tubes are shipped in a high quality dual box
- Tube printing with real gold (metal), red color is glass burned into the glass
- Gold Plated, black ceramic socket
Guarantee program for first owner.
At EML we have the normal guarantee. In addition to that, the first owner can register the tube within 4 weeks after receival, at the Emission Labs® website, to participate in the 5 years guarantee program.
