Manley Labs 50/50 owner manual Output B+ Mains, Iec Mains, Fuses, Input, Tube Bias Adjust Points

INPUT	OUTPUT B+ MAINS	IEC MAINS
RCA	FUSES	IN

TUBE BIAS ADJUST POINTS
1	2	3	4
	6414	6414
1	2		3	4
	12AT7	12AT7

Amplifier Overhead View

with top cover removed

OUTPUT TUBES:4 x RUSSIAN 6CA7/EL34

The 6CA7's used are the Russian up-rated 6CA7's. This has been proven to be the rugged and reliable of this type and we strongly emphasize that only the RUSSIAN 6CA7's should be used in this amplifier. The MANLEY DIRECT INPUT 50/50 has been thoroughly optimised around this tube. Use of unapproved tube types can and will void your warranty.

DRIVER TUBES: 2 x 6414

The 6414 is an American military uprated version of the 12BH7A with increased current drive.

INPUT TUBES: 2 x 12AT7WA

The 12AT7WA has several equivalent numbers, (12AT7, 12AT7A, 6201, ECC81, etc.) Any of these types may be used. We have selected this 12AT7WA very carefully for noise, microphonics, and constancy. Replacement tubes of premium quality are always available from MANLEY LABORATORIES.