Interstage, headphone and line output transformers
Model | Turns Ratio | Comments | Price USD |
1+1:1+1 | Noninverting interstage / anode choke | 106.00 | |
1+1:1+1 | Interstage. Preferably push pull to push pull. The LL1635 are an old designs and not well suited for SE applications. We recommend LL1635/5mA for push-pull preamplifier stages where some DC imbalance might occur. The LL1635 data sheet is updated to reflect some limitations in it's use. | 112.00 | |
1+1:1+1: 2.5+2.5 | Interstage and line output. | 115.00 | |
LL1660NC | 1+1:1+1: 2.5+2.5 | Interstage and line output with nanocrystalline core | 284.00 |
2.5+2.5:2+2 | SE - PP and PP - PP Interstage. Internal Faraday shields for improved balance. | 138.00 | |
LL1660SNC | 2.5+2.5:2+2 | SE - PP and PP - PP Interstage. Internal Faraday shields for improved balance with nanocrystalline core. | 307.00 |
LL1660SAM | 2.5+2.5:2+2 | SE - PP and PP - PP Interstage. Internal Faraday shields for improved balance. Amorphous core. | 289.00 |
LL1660SAg | 2.5+2.5:2+2 | SE - PP and PP - PP Interstage. Internal Faraday shields for improved balance. Silver wire. | 2981.00 |
LL1660SAgAM | 2.5+2.5:2+2 | SE - PP and PP - PP Interstage. Internal Faraday shields for improved balance. Silver wire and amorphous core. | 3204.00 |
LL1660AM | 2.5+2.5:2+2 | SE - PP and PP - PP Interstage. Internal Faraday shields for improved balance. Amorphous core. | 266.00 |
LL1660Ag | 2.5+2.5:2+2 | SE - PP and PP - PP Interstage. Internal Faraday shields for improved balance. Silver wire. | 2947.00 |
LL1660AgAM | 2.5+2.5:2+2 | SE - PP and PP - PP Interstage. Internal Faraday shields for improved balance. Silver wire and amorphous core. | 3171.00 |
1+1+1+1:2+2 | High current interstage | 112.00 | |
LL1671AM | 1+1+1+1:2+2 | High current interstage, amorphous core | 266.00 |
LL1671NC | 1+1+1+1:2+2 | High current interstage, with nanocrystalline core | 281.00 |
1+1+1+1:4+4 | High current interstage transformer (For 300B driving tube). | 122.00 | |
LL1677NC | 1+1+1+1:4+4 | High current interstage transformer (For 300B driving tube) with nanocrystalline core | 291.00 |
1.75+1.75:1+1+1+1 | Interstage transformer. Compromise between the LL1660 and the LL1671. | 115.00 | |
LL1692ANC | 1.75+1.75:1+1+1+1 | Interstage transformer. Compromise between the LL1660 and the LL1671, with nanocrystalline core. | 284.00 |
LL1692AAM | 1.75+1.75:1+1+1+1 | Interstage transformer. Compromise between the LL1660 and the LL1671, amorphous core. | 266.00 |
LL1692AgAM | 1.75+1.75:1+1+1+1 | Interstage transformer. Compromise between the LL1660 and the LL1671, silver wire and amorphous core | 2947.00 |
1+1:2+2 | Stepup 1:2 interstage transformer, designed for two stage amplifiers. | 150.00 | |
LL2746AM | 1+1:2+2 | Stepup 1:2 interstage transformer, designed for two stage amplifiers, amorphous core | 329.00 |
LL2746Ag | 1+1:2+2 | Stepup 1:2 interstage transformer, designed for two stage amplifiers, silver wire | 3941.00 |
1+1:1+1 | For single end to single end application | 150.00 | |
LL2753AM | 1+1:1+1 | For single end to single end application, amorphous core | 329.00 |
LL2753Ag | 1+1:1+1 | For single end to single end application, silver wire | 2949.00 |
1+1:1+1 | For single end to single end applications. High impedance version compared to LL2753. | 156.00 | |
1+1:1+1 | Modified 1660 for SE to SE applications | 115.00 | |
LL2762NC | 1+1:1+1 | Modified 1660 for SE to SE applications with nanocrystalline core | 284.00 |
LL2762AM | 1+1:1+1 | Modified 1660 for SE to SE applications, amorphous core | 266.00 |
LL2762Ag | 1+1:1+1 | Modified 1660 for SE to SE applications, silver wire | 2594.00 |
LL2672AgAM | 1+1:1+1 | Modified 1660 for SE to SE applicationssilver wire and amorphous core | 2818.00 |
Our tube amplifier transformers are built to order in our dual coil single C-core style and can be ordered with a choice of core air-gap for Push-Pull or Single-Ended applications. For the comprehensive list of sub-types, please click here.
The use of C-cores with well-defined air-gap results in an almost constant inductance throughout the whole operating voltage range. For SE transformers, the primary inductance variation due to signal level is less than 7%.
Most of the transformers below are available with amorphous iron C-cores. The amorphous cores are considered to have sonic advantages, but the signal level capability with amorphous core is about 30% less than with a conventional silicon-iron C-core.
Interstage Transformers
Line Output
Model | Turns Ratio | Comments | Price USD |
7.2+7.2:1+1 | Line output, primarily for push pull drive. The LL1630 are an old designs and not well suited for SE applications. We recommend LL1630/5mA for push-pull preamplifier stages where some DC imbalance might occur. | 141.00 | |
9+9:1+1+1+1 | Line output transformer based on the UTC LS-27 specifications | 136.00 | |
9+9:1+1+1+1 | Line output transformer based on the LL1660 size and structure | 130.00 | |
LL1689AM | 9+9:1+1+1+1 | Line output transformer based on the LL1660 size and structure, amorphous core | 281.00 |
LL1689Ag | 9+9:1+1+1+1 | Line output transformer based on the LL1660 size and structure, silver wire | 2970.00 |
LL1689AgAM | 9+9:1+1+1+1 | Line output transformer based on the LL1660 size and structure, silver wire and amorphous core | 3194.00 |
5.8+5.8:1+1 | Mu metal core transformer for DC free (parafeed) line output | 69.00 | |
1+1:1+1 | Low impedance line output transformer | 112.00 | |
2.8+2.8: 1+1+1+1 | Line output | 130.00 | |
LL2745 | 2.8+2.8: 1+1+1+1 | Line ouptut with nanocrystalline core | 299.00 |
2+2:1+1+1+1 | Small size low impedance line output transformer, normally used 1:1 | 106.00 | |
4+4:1+1+1+1 | Line output transformer based on the LL1660 size and structure. Available in copper or silver wire versions. Price here is for copper. | 130.00 | |
LL2763 | 4+4:1+1+1+1 | Line output transformer based on the LL1660 size and structure. Available in copper or silver wire versions with nanocrystalline core. Price here is for copper. | 299.00 |
LL2763AM | 4+4:1+1+1+1 | Line output transformer based on the LL1660 size and structure. Available in copper or silver wire versions. Price here is for copper, amorphous core. | 281.00 |
LL2763Ag | 4+4:1+1+1+1 | Line output transformer based on the LL1660 size and structure. Available in copper or silver wire versions. Price here is for copper, silver wire. | 2580.00 |
LL2763AgAM | 4+4:1+1+1+1 | Line output transformer based on the LL1660 size and structure. Available in copper or silver wire versions. Price here is for copper, silver wire and amorphous core. | 2804.00 |
4+4:1+1+1+1 | Line output transformer with Nanocrystalline C-core, suitable for preamps, phono stages etc | 422.00 |
Model | Turns Ratio | Comments | Price USD |
1+1:1+1 | For low impedance sources | 112.00 | |
6+6:1+1 | Primary impedance approx. 5k with 32, 150 or 600 ohm headphones | 130.00 | |
" | Same as the LL2765 above but with an Amorphous core | 310.00 | |
" | Same as the LL2765 above using silver wire | 3142.00 | |
" | Same as the LL2765 above using silver wire as well as an Amorphous core. | 3410.00 | |
6.8+6.8: 1+1+1+1 | For 3k primary impedance to 16, 64 and 300 ohms | 127.00 |
Headphone Output Transformers
To place an order, please click here