LL1620, LL1623, LL1627, LL9202
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Tube Amplifier Output Transformers
LL1620 , LL1623, LL1627, LL9202
The LL1620, LL1623, LL1627 and LL9202 are output transformers for tube amplifiers. All transformers are based on the
same core size, winding structure and secondaries, but differ in number of turns (and thus impedance level) of primaries.
The transformers are highly sectioned with harmonically sized sections, which results in a minimum leakage inductance.
This, combined with a low capacitance coil winding technique results in a wide frequency range.
The transformers have a special audio C-core of our own production, which is gapped for desired DC current.
The transformers are of open frame type suitable for mounting inside an amplifier housing.
Physical dimensions, pin and mounting hole layout for LL1620, LL1627 (all dimensions in mm)
Physical dimensions, pin and mounting hole layout for LL1623, LL9202 (all dimensions in mm)
R031020
Secondary connections
Bottom view
Primary connections
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
4 x M4
Mounting holes
110
53
90
78
85
1
2
3
4
5
6
7
8
Secondary connections
Bottom view
Primary connections
3
1
2
4
7
5
6
8
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
4 x M4
Mounting holes
110
53
90
78
85
LUNDAHL
TRANSFORMERS
Tibeliusgatan 7
International
Domestic
S-761 50 NORRTÄLJE
Phone
+46 - 176 13930
0176-13930
SWEDEN
Fax
+46 - 176 13935
0176-13935
