valve output transformer

TYPE NUMBER 1663. THEY WILL SOUND FANTASTIC. IN GREAT CONDITION. IN GOOD WORKING ORDER AND SOUND VERY GOOD. SECONDARY IMPEDENCE, 0 - 2.3 - 15 OHMS. PRIMARY IMPEDENCE, 6 K OHMS.

8K Primary and 4, 8 and 16 ohm secondaries. Ideal for 2 X EL84 e.g. Vox AC15 or Marshall 18W. Limited number available. Renowned for excellent sound by hobby and trade amplifier builders. Hand made in the UK with UK imperial materials.

Secondary 1;- 250 Vac 25mA.

Weight 1.2kg. Rated at 3 Watts with a 60ma DC anode current. 0, 2.75ohm, 3.75ohm, 7.5ohm and 15ohm.

One out of a GECBC5445 not sure what the other was out of.

Approx 480 ohms primary with a 28 ohms tap. and secondary. 3-4ohms speaker impedence. tapped 1.1-4.8 dc ohms. was ecl82 valves but maybe could be used with others. weight 180grams each approx.

THEY WILL SOUND FANTASTIC. TYPE NUMBER 1428. IN GREAT CONDITION. IN GOOD WORKING ORDER AND SOUND VERY GOOD. SECONDARY IMPEDENCE, 0 - 2.3 - 15 OHMS. PRIMARY IMPEDENCE, 6 K OHMS.

This has been tested for continuity via the ohm reading on a DMM.

Suitable for EL84 output valve and 3 ohm Speaker. Primary DC resistance 300 Ohms.

Two required for a stereo amp. A Grid tap is provided in the primary winding for use with Ultra-Linear amplifier circuits. Primary coil resistance: around 400?. (B-P, Inductance: 25H. Power: 10W. ).

Suitable for 3 ohm Speaker. Primary DC resistance 650 Ohms.

Suitable for 3 ohm Speaker. Primary DC resistance 300 Ohms.

Size is important factor, if you would like hearing low non-distortional bass from your tube amp. These are capable transfer power more close to low end of musical diapason. Potential tube plate current up to 130 mA; nominal current 80mA;.

10 W maximum load at 40 HzPrimary inductance of 20.7 H at 1 kHz, 0.1 VTypical primary leakage inductance of 8 mH at 1 kHz, 0.1 V1.6 nF interwinding capacitance at 20 kHz. This core enables reduced distortion and stray magnetic field.

Example of tubes to use: 4212, 211, 845, DA60, DA100, RS282, RS291, GM70 & e.t.c. Size is important factor, if you would like hearing low non-distortional bass from your tube amp. These are capable transfer power more close to low end of musical diapason.

Size is important factor, if you would like hearing low non-distortional bass from your tube amp. These are capable transfer power more close to low end of musical diapason. Potential tube plate current up to 120 mA; nominal current 70mA;.

Example of tubes to use: 211, 845, DA60, DA100, RV258, RV239, RS282, RS291, GM70 & e.t.c. Size is important factor, if you would like hearing low non-distortional bass from your tube amp. These are capable transfer power more close to low end of musical diapason.

Amplifier output resistance with 300B tube - 1,6 Ohm. Material used for insulation - paper. R1 = 140 Ohm; R2 = 0,23 Ohm; resistance calculated to tube plate - 144 Ohm. Size is important factor, if you would like hearing low non-distortional bass from your tube amp.

Size is important factor, if you would like hearing low non-distortional bass from your tube amp. These are capable transfer power more close to low end of musical diapason. Potential tube plate current 150 mA, up to 220 mA MAX;.

Valve each amp : One pair 845 they are New less than 100 hours used, One ECC 82 NOS and One 6BX7GT NOS. Recently my friend upgrade 2 Silver Signal capacitor each amp, full check up by his techchian.

We will try to find a solution acceptable to all. for 3 to 8 ohm speakers, tested good.

THIS UNIQUE DESIGN MANUAL IS A GREAT VALUE-FOR-MONEY, IT CONTAINS HARD-TO-FIND INFORMATION that until now has not been available in one publication. 25 finished designs that you can wind straight away, without any calculations!