Трансформатор LUNDAHL LL1668. Инструкция на английском языке

Tibeliusgatan 7                        International    Domestic
S-761 50 NORRTALJE          Phone    +46 - 176 13930   0176-13930
SWEDEN                      Fax      +46 - 176 13935   0176-13935
Tube anode chokes
LL1667 and LL1668
The LL1667 and LL1668 are anode chokes for tube amplifiers. The chokes are built with two coils and are using our
own special audio C-core. The coils is made using a low capacitance coil winding technique. The two coil structure
greatly reduces the risk of picking up hum caused by external magnetic fields from e.g. mains transformers.
The LL1667 and LL1668 are available with different core airgaps resulting in different inductance-DC current
combinations on request.
Winding schematics, physical dimensions, pin and mounting hole layout (all dimensions in mm)
36
4     3   2    1         3    4   2  1
4 x M3
Mounting holes
56
73
Bottom view
45
63
LL1667          LL1668
Weight:                                                  0.78 kg        0.78 kg
Static resistance of each winding                        1.2 kW          340 W
Max DC current per winding, all applications             40 mA           80 mA
Isolation between windings and core:                      4 kV           4 kV
Type         Approx. inductance     Standing         Saturating    Max signal voltage @
(windings in series)   DC current     DC current           30 Hz
LL1667 / 15mA          270 H              15 mA            25 mA           390V RMS
LL1668/ 25 mA          100 H              25mA             40 mA           235V RMS
Usage:
Single-end                                         Push-pull
V +                                                  V +
1                                                    1
LL1667                                               LL1667
2                                                    2
or                                                   or
3   LL1668                                           3   LL1668
4                                                    4
NOTE! In previous shipments (and datasheet) of LL1667 and LL1668 (labeled "Choke
R001106
LL166…"), the core air gap were incorrectly set.
From Nov 1, 2000, airap is corrected and the chokes are labeled  "Anode Choke…"