WELTER STANDARD AUDIO OUTPUT TRANSFORMERS

WELTER standard audio output transformers are designed to replace existing units in guitar amplifiers and for commonly used circuits, utilizing most popular tubes.

  • High quality and reliable replacement transformers for existing tube/guitar amplifiers.

  • Superior performance vs. price ratio


U 1

10-18 W Universal audio output transformer 

Ra-a: 8,0 kOhm
Output windings: 4 - 8 Ohm
I max. 40 mA
Frequency response 40Hz-28kHz +/-3db
Suitable for: 2 x EL84, 2 x 6V6, 2 x PCL 86
Dimensions: 64x53x48mm
 
Weight 0,5 kg

U 3

12-18 W Ultralinear audio output transformer for guitar and HiFi amplifiers

Ra-a: 8,0 kOhm
Output windings: 4 - 8 Ohm
I max. 50 mA
Frequency response 35Hz-30kHz +/-3db
Suitable for: 2 x EL84, 2 x 6V6, 2 x PCL 86
Dimensions: 64x53x57mm
 
Weight 0,79 kg

U 4

50 W Audio output transformer. Made to original Marshall® transformer specifications.

Ra-a: 3,4kOhm
Output windings: 4, 8, 16 Ohm
Suitable for: 2xEL34/6550
Dimensions: 98x80x93mm (dimensions to fit and replace original Marshall® transformer)
 
Weight 2,2 kg

U 4 LE

Similar to U 4, but for horizontal drop-through installation

Ra-a: 3,4kOhm
Output windings: 4,  8,  16 Ohm
Suitable for: 2xEL34/6550
Dimensions: 98x80x83mm
 
Weight 2,12 kg

U 5

200W special audio output transformer.  Made to original HIWATT® 200 specifications

Ra-a: 2,6 kOhm
Output windings: 4, 8, 16 Ohm
Suitable for: HIWATT® 200 and 6 x EL34/6550A valve amplifiers
Dimensions: 135x113x106 mm
 
Weight 6,2 kg

U 6

200-250 W special transformer. Made for PA, Guitar, Bass and HiFi amplifiers.

Ra-a: 1,7 kOhm
Output windings: 4, 8 Ohm
Suitable for: 6 x EL34/6550A/KT88
Dimensions: 135x113x106mm
 
Weight 6,3 kg

U 7

320-380 W special transformer. Like U 6, but with higher power rating.

Ra-a: 1,5 kOhm
Output windings: 4, 8 Ohm
Suitable for: 8 x EL34/6550A/KT88
Dimensions: 135x113x127mm
 
Weight 8,3 kg

U 8/1

Ampeg® SVT special transformer.  Made to original specifications.

Ra-a: 1,6 kOhm
Output windings: 2 and 4 Ohm
Suitable for: 6 x 6550A/KT88
Dimensions: 135x113x125 mm
 
Weight 8,2kg

U 8/2

Ampeg® SVT special transformer.  Made to original specifications.

Ra-a: 1,6 kOhm
Output windings: 4 and 8 Ohm
Dimensions: 135x113x125 mm
 
Weight 8,2 kg

U 9/3

UL 40-50 Watt Universal transformer

Ra-a: 3,6 kOhm
Output windings: 4, 8 Ohm
I max.  
Frequency response  
Suitable for: 2 x EL34 or 2 x 6L6GC
Dimensions: 100x80x66 mm
 
Weight 2,0 kg

U 11

200 W audio output transformer

Ra-a: 2,3 kOhm
Output windings: 4, 8 Ohm
Suitable for: 4x6550A/KT88
Dimensions: 135x113x119 mm
 
Weight 6,2 kg

U 134-8

80W Class-B audio output transformer

Ra-a: 8 kOhm
Output windings: 4, 8, 16
I max.  
Frequency response  
Suitable for: 2 x EL34 (for 690V anode voltage, 400V screen grid)
Dimensions: 102x102x89 mm
 
Weight 4,0 kg

U 134-10

80W Class-B audio output transformer

Ra-a: 10 kOhm
Output windings: 4, 8, 16 Ohm
Suitable for: 2 x EL34 (for 790V anode voltage, 400V screen grid)
Dimensions: 102x102x89 mm
 
Weight 4,1 kg

U 15

UL 100-120 W audio output transformer. Replacement for Marshall® and HIWATT® amplifiers.

Ra-a: 1,8 kOhm
Output windings: 4, 8, 16 Ohm
Suitable for: 4 x EL34/6550A/KT88
Dimensions: 125x100x90 mm
 
Weight 6,2 kg

U 16

30-40 W audio output transformer. Made to VOX®-AC30 -specification

Ra-a: 3,8 kOhm
Output windings: 4, 8, 16 Ohm
Suitable for: 4 x EL84 and 2 x EL34
Dimensions: 96x80x70 mm
 
Weight 2,1 kg

U 16-1

30-40 W audio output transformer. Similar to U 16, but for horizontal installation.

Ra-a: 3,8 kOhm
Output windings: 4, 8, 16 Ohm
Suitable for: 4 x EL84 and 2 x EL34
Dimensions: 96x80x70 mm
 
Weight 2,1 kg

U 16-2

30-40 W audio output transformer. Similar to U 16, but for vertical installation and with bell-ends.

Ra-a: 3,8 kOhm
Output windings: 4, 8, 16 Ohm
Suitable for: 4 x EL84 and 2 x EL34
Dimensions: 96x80x70 mm
 
Weight 2,1 kg

U 17

120-150 W audio output transformer. Made to meet original Sound-City® specifications.

Ra-a: 1,25 kOhm
Output windings: 4, 8, 16 Ohms
Suitable for: 6 x EL34/6550A/KT88
Dimensions: 126x100x100 mm
 
Weight 5,0 kg

U 18

35/70W audio output transformer. Replacement for Music-Man® amplifiers

Ra-a: 10 kOhm
Output windings: 4, 8 Ohm
Suitable for: Music-Man® 450/740V-35/70W. Class-B-operation for 2xEL34
Dimensions: 98x80x93 mm
 
Weight 2,4 kg

U 19

UL 100-135 W audio output transformer. Made to original Fender® specifications.

Ra-a: 2,5 kOhms
Output windings: 4, 8 Ohms
Suitable for: 4 x 6L6GC/5881
Dimensions: 96x80x86 mm 
 
Weight 2,8 kg

U 21/12

UL 50-60 W audio output transformer. Replacement for Fender® and Mesa-Boogie®-Amps.

Ra-a: 4,4 kOhm
Output windings: 4, 8 Ohm
Suitable for: 2x6L6GC/5881
Dimensions: 100x80x71mm
 
Weight 2,2kg

U 22

60/120 W Music-Man® audio output transformer.

Ra-a: 3,0 kOhm
Output windings: 4, 8 Ohm
Suitable for: 4x6L6GC/EL 34. 350/700V 60/120 W operation.
Dimensions: 98x80x104 mm
 
Weight 2,9 kg

U 23

Fender®-Bassman 100 -audio output transformer replacement.

Ra-a: 2,75 kOhm
Output windings: 4, 8 Ohm
Suitable for: 4 x 6L6GC. Fender®-Bassman
Dimensions: 125x100x105mm
 
Weight 5,1 kg

U 24/25

Fender®/Peavey® audio output transformer

Ra-a: 4,6 kOhms
Output windings: 4, 8 Ohms
Suitable for: 2x6L6GC / 5881. Fender Bandmaster / Tremolux (022848-125A6) or Peavey Classic (70500184-P165). May be used in other guitar amplifier designs as well.
Dimensions: 82x65x58 mm
 
Weight 1,2 kg

HT 20

0,8-1,5 W Reverb transformer for guitar and keyboard amplifiers

Output winding: 10-20 Ohms
Suitable for: 1 x ECC81 parallel (350-400V anode voltage).
Dimensions: 45x35x33 mm
 
Weight Almost unnoticeable
 
 
 

PRICES 2006

Item Reference Price EUR / each VAT 22%
U 1 10-18 W Universal audio output transformer 49,00
U 3 12-18 W Ultralinear audio output transformer for guitar and HiFi amplifiers 60,50
U 4 50 W Marshall® Audio output transformer 95,00
U 4 LE Similar to U 4, but for horizontal drop-through installation 95,00
U 5 200W special audio output transformer. HIWATT® 200 specifications 193,50
U 6 200-250 W special transformer. Made for PA, Guitar, Bass and HiFi amplifiers. 196,50
U 7 320-380 W special transformer. Like U 6, but with higher power rating. 220,00
U 8/1 Ampeg® SVT special transformer.  Made to original specifications. 215,00
U 8/2 Ampeg® SVT special transformer.  Made to original specifications. 215,00
U 9/3 UL 40-50 Watt Universal transformer 59,70
U 11 200 W audio output transformer 195,00
U 134-8 80W Class-B audio output transformer 120,00
U 134-10 80W Class-B audio output transformer 108,00
U 15 UL 100-120 W audio output transformer. Replacement for Marshall® and HIWATT® amplifiers. 115,00
U 16 30-40 W audio output transformer. Made to VOX®-AC30 -specification 84,00
U 16-1 30-40 W audio output transformer. Similar to U 16, but for horizontal installation. 93,00
U 16-2 30-40 W audio output transformer. Similar to U 16, but for vertical installation and with bell-ends. 102,00
U 17 120-150 W audio output transformer. Made to meet original Sound-City® specifications. 148,00
U 18 35/70W audio output transformer. Replacement for Music-Man® amplifiers 106,00
U 19 UL 100-135 W audio output transformer. Made to original Fender® specifications. 122,00
U 21/12 UL 50-60 W audio output transformer. For Fender® and Mesa-Boogie® amps. 84,00
U 22 60/120 W Music-Man® audio output transformer. 120,00
U 23 Fender®-Bassman 100 -audio output transformer replacement. 143,00
U 24/25 Fender®/Peavey® audio output transformer 75,00
HT20 0,8-1,5 W Reverb transformer for guitar and keyboard amplifiers 25,00
 

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