Engl Metalmaster 20 E304, Руководство оператора

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the tubes and their function:
V 1 - ECC83 (12AX7): input stage, 2. gain stage; grade: FQ selected
V 2 - ECC83 (12AX7): Lead driver stage, 4. stage; grade: selected
V 3, V 4 - EL84 (6BQ5): power tubes, poweramp, matched set
Technical Data
Rated power: approx. 20 watts (maxium);
Input sensitivity level Input, Clean channel: -20 dB nominal.;
Input sensitivity FX Return: -20 dB, approx. 0 dB max.;
Output level FX Send, level range: -20 dB to approx. 0 dB peak;
Balanced Line Output: 0 dB peak;
Tubes: 2 x ECC 83 (12AX7);
further details see below! 2 x EL 84 (6BQ5);
Fuses:
mains fuse at 100 / 110 / 120 mains voltage 0.8 ATL (T: slo-blo);
mains fuse at 220 / 230 / 240 mains voltage 0.4 ATL (T: slo-blo);
Power Tube Fuses (internal on main PCB): 2 x 0.08 AM (80 mA, M: medium blow)
Important: Replace fuses only against same type and rating!
Power Consumption: approx. 80 watts max.;
Dimensions:
Combo (type E302, E304): approx. 42 cm x 37 (40) x 23 cm (W x H x D);
approx. 16.5" x 14.6" (15.7") x 9";
Head (type E307, E309): approx. 42 cm x 20 (23) x 23 cm (W x H x D);
approx. 16.5" x 7.9" (9") x 9";
Weight:
Combo: approx. 13.3 kg (E302); approx. 14.2 kg (E304);
approx. 29.3 lb (E302); approx. 31.3 lb (E304);
Head: approx. 8.9 kg (E307); approx. 9.2 kg (E309);
approx. 19.6 lb (E307); approx. 20.3 lb (E309);
Tube array:
Tube replacement report:
1. Replaced on: _ _ _ _ _ _ _ 20 _ _ _ Replaced by: _ _ _ _ _ _ _ _ _ _ _ _ _ _
Replaced tubes: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Reason: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
2. Replaced on: _ _ _ _ _ _ _ 20 _ _ _ Replaced by: _ _ _ _ _ _ _ _ _ _ _ _ _ _
Replaced tubes: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Reason: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
3. Replaced on: _ _ _ _ _ _ _ 20 _ _ _ Replaced by: _ _ _ _ _ _ _ _ _ _ _ _ _ _
Replaced tubes: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Reason: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Output
Transformer
Mains
Transformer
front panel
chassis viewed
from above
V 1:
ECC83
12AX7
V 3:
EL84
6BQ5
Power Soak
Connector
V 2:
ECC83
12AX7
V 4:
EL84
6BQ5
Input