Valve Audio Push-pull Output Transformers

Links
[U-Clamp Style] [Frame Style] [Drop-Through Style] [Shroud with Feet Style]
U-Clamp Frame Drop-Through Shroud with Feet
  • Page Updated 04 March 2020.
  • Colour code change for secondaries will be implemented gradually:
  • Common - no change - Black
  • 3/4 ohms - was Blue - will be Grey
  • 7/8 ohms - was Brown - will be White
  • 15/16 ohms - was Red - will be Pink
  • This is being done to prevent conflict with primaries.
  • A range of Push-Pull Output Transformers for Valve Power Amplifiers.
  • Transformers are designed to match the valve data in our valve data page.
  • Alternative Ra or HT figures can be supplied. Call or Email to check feasability.
  • Various Mounting styles available.
  • Universal Push-Pull types can be used in Triode, 20% Ultra Linear and 43% Ultra Linear.
  • Multi-section interleaved windings for low leakage inductance.
  • Low flux density for low distortion and low external magnetic fields.
  • Professional quality materials.
  • Compliant with current safety requirements.
  • Impedance matched to specific valves and loudspeakers at rated RMS wattage.
  • Grain Orientated Thin Iron Cores.
  • Special versions made to order.


Order Codes and Datasheet Links. In Valve number order.

Range Codes:

  • N = Normal (Standard range for general use).
  • S = Simple (Reduced primary complexity).
Status Order Code Range Description Clamp Frame Drop Through Metal Shroud with Feet
VTP13135 range
(Previously VTP201)		 N 6L6.
RMS Power 30 Watts.
Primary Ra-a 6600 ohms.
UL taps at 20% and 43%.
Output 3 8 and 16 ohms.		 U clamp not available for this size VTP13135-1200 Data Sheet VTP13135-1300 Data Sheet VTP13135-1440 Data Sheet
VTP12566 range
(Previously VTP202)		 N 6V6.
RMS Power 15 Watts.
Primary Ra-a 8000 ohms.
UL taps at 20% and 43%.
Output 3 8 and 16 ohms.		 VTP12566-1100 Data Sheet VTP12566-1200 Data Sheet VTP12566-1300 Data Sheet VTP12566-1440 Data Sheet
New. Alternative shape VTP18737 range N 6V6.
RMS Power 15 Watts.
Primary Ra-a 8000 ohms.
UL taps at 20% and 43%.
Output 3 8 and 16 ohms.		 VTP18737-1100 Data Sheet VTP18737-1200 Data Sheet VTP18737-1300 Data Sheet VTP18737-1440 Data Sheet
VTP15671 S K ECC82 / 12AU7.
RMS Power 1.5 Watts.
Primary Ra-a 22500 ohms.
Output 8 ohms.
Suitable for the Firefly Amplifier.		 VTP15671-1100 Data Sheet Frame not available for this size Drop through not available for this size Shroud with feet not available for this size
VTP12923 range
(Previously VTP203)		 N EL34.
6CA7.
RMS Power 20 Watts.
Primary Ra-a 6600 ohms.
UL taps at 20% and 43%.
Output 3 8 and 16 ohms.
Optimised for Mullard 5-20.		 U clamp not available for this size VTP12923-1200 Data Sheet VTP12923-1300 Data Sheet VTP12923-1440 Data Sheet
VTP12925 range
(Previously VTP204)		 N K EL84.
6BQ5.
RMS Power 10 Watts.
Primary Ra-a 6600 ohms.
UL taps at 20% and 43%.
Output 3 8 and 16 ohms.
Optimised for Mullard 5-10.		 VTP12925-1100 Data Sheet VTP12925-1200 Data Sheet VTP12925-1300 Data Sheet VTP12925-1440 Data Sheet
New. Alternative shape VTP18738 range N K EL84.
6BQ5.
RMS Power 10 Watts.
Primary Ra-a 6600 ohms.
UL taps at 20% and 43%.
Output 3 8 and 16 ohms.
Optimised for Mullard 5-10.		 VTP18738-1100 Data Sheet VTP18738-1200 Data Sheet VTP18738-1300 Data Sheet VTP18738-1440 Data Sheet
VTP12225 range
(Previously VTP210)		 N 2 pair EL84 parallel
6BQ5.
RMS Power 15 Watts.
Primary Ra-a 3500 ohms (3k to 4k).
UL taps at 20% and 43%.
Output 3 8 and 16 ohms.		 VTP12225-1100 Data Sheet VTP12225-1200 Data Sheet VTP12225-1300 Data Sheet VTP12225-1440 Data Sheet
VTP12496 range
(Previously VTP228)		 N 2 pair EL84 parallel
6BQ5.
RMS Power 30 Watts.
Primary Ra-a 3500 ohms (3k to 4k).
UL taps at 20% and 43%.
Output 3 8 and 16 ohms.		 U clamp not available for this size VTP12496-1200 Data Sheet VTP12496-1300 Data Sheet VTP12496-1440 Data Sheet
VTP12557 range
(Previously VTP209)		 N EL90
6AQ5.
RMS Power 5.6 Watts.
Primary Ra-a 10K.
UL taps at 20% and 43%.
Output 3 8 and 16 ohms.		 VTP12557-1100 Data Sheet VTP12557-1200 Data Sheet VTP12557-1300 Data Sheet VTP12557-1440 Data Sheet
VTP12186 range
(Previously VTP205)		 N EL91.
RMS Power 4 Watts.
Primary Ra-a 24K.
UL taps at 20% and 43%.
Output 3 8 and 16 ohms.		 VTP12186-1100 Data Sheet VTP12186-1200 Data Sheet VTP12186-1300 Data Sheet VTP12186-1440 Data Sheet
VTP12259 range
(Previously VTP206)		 N EL95.
RMS Power 7 Watts.
Primary Ra-a 10K.
UL taps at 20% and 43%.
Output 3 8 and 16 ohms.		 VTP12559-1100 Data Sheet VTP12559-1200 Data Sheet VTP12559-1300 Data Sheet VTP12559-1440 Data Sheet
VTP12298 range
(Previously VTP222)		 N ECL80 (Not UltraLinear).
RMS Power 4 Watts.
Primary Ra-a 15000 ohms.
Output 3 8 and 16 ohms.
 VTP12298-1100 Data Sheet VTP12298-1200 Data Sheet VTP12298-1300 Data Sheet VTP12298-1440 Data Sheet
VTP12889 range
(Previously VTP207)		 N UCL82 (Not UltraLinear).
RMS Power 7 Watts.
Primary Ra-a 6600 ohms.
Output 3 8 and 16 ohms.
Optimised for Mullard AC/DC 7W.		 VTP12889-1100 Data Sheet VTP12889-1200 Data Sheet VTP12889-1300 Data Sheet VTP12889-1440 Data Sheet
VTP13186 range
(Previously VTP212)		 N ECL86.
RMS Power 10 Watts.
Primary Ra-a 8200 ohms.
UL taps at 20% and 43%.
Output 3 8 and 16 ohms.		 VTP13186-1100 Data Sheet VTP13186-1200 Data Sheet VTP13186-1300 Data Sheet VTP13186-1440 Data Sheet

© 2017 Variable Voltage Technology Ltd. Document Number DCW12705.
Issue Number: 24 - Dated: 08May2017 - FRACAS: X50480 - Release: Y11270.