Emission Labs EML 274A / 274B Mesh Rør

Pris er for 1 stk. rør!

Guarantee

The first owner can register the tube at the Emission Labs ®website, to participate in the 5 years guarantee program.
DescriptionThis 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.

FeaturesSlow Start ( 2...7 seconds)
Filaments are series connected, for best symmetry of the two diodes inside.
Two extra large getters
Each tube is numbered, inside the bulb with a metal Tag
Two extra large getters, flashing the complete tube bottom
These tubes are shipped in a high quality box
Tube printing with real gold (metal), red color is burned into the glass

Filament Ratings
Filament Voltage
5 Volt (AC or DC)
Tolerance on filament voltage
5%
Filament Current
2 Ampere

Maximum ratings.
NOT possible simultaneously
Take one maximum number, you must de rate another
READ all notes at the bottom of this Data sheet.
AC input voltage
550Volts
First capacitor,  connected to Anodes
4uF
DC output current
160mA

Mere information HER

Varenr. 274A: 110-027-45 / 274B: 110-029-85