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EL84 10W Output transformer – Mullard 5-10 etc
8000 Ohm primary. 43% Ultra linear taps for improved distortion.
Price range: £82.56 through £119.26
A high quality 10W at 20Hz Push pull ultra linear output transformer. Designed for the Mullard 5-10 amplifier but may be used in any single ended design with a valve having an output impedance of 8000 Ohms anode to anode, such as an EL84.
This is similar to our 6600 Ohm 20% ultra linear tap design, but results in an improvement in distortion of around 0.1% as described in the Mullard “Circuits for amplifiers” book.
Multi section winding, for reduced leakage inductance.
Inductance 35H at 25Hz.
Leakage inductance 3mH
Wide bandwidth, 10-50KHz. (-1dB)
Output impedance 4,8 and 16 Ohms.
High quality Grain Orientated M6 0.35mm.
Hand laminated for the best stacking factor, and accuracy.
Double coated Grade 2 enamelled copper wire.
Wound using CNC winders for highly accurate wire placement and turns count.
Layer wound for excellent wind consistency and alignment resulting in reduced leakage inductance.
High quality PVC 600V
Primary : 24AWG UL1015
Secondary : 20 AWG UL1015
Frame, Drop through or stand up versions, all with flying leads.
1.6Kg
| Weight | 1.6 kg |
|---|---|
| Mounting type | Stand up, Drop through, Frame |
| Output Impedance | 4, 8 & 16 Ohms, 4 Ohms, 8 Ohms, 16 Ohms |
| Ultra linear tap | 43% |
Here are dimensional diagrams for this transformer.
Please refer to the relevant key below for the dimensions.
shroud_with_feet.pdf
frame.pdf
drop_through.pdf
| Label | Description | Dimension (mm) |
|---|---|---|
| A | Width | 64 |
| B | Height | 78 |
| C | Depth | 83 |
| D | Mounting depth | 48 |
| E | Mounting width | 57 |
| F | Hole width | 5 |
| Label | Description | Dimension (mm) |
|---|---|---|
| A | Width | 79 |
| B | Height | 67 |
| C | Depth | 70 |
| D | Mounting height | 54 |
| E | Mounting width | 54 |
| F | Mounting depth | 54 |
| G | Overall depth | 70 |
| H | Mounting hole width | 5 |
| Label | Description | Dimension (mm) |
|---|---|---|
| A | Width | 64 |
| B | Length | 76 |
| C | Height | 60 |
| D | Cutout width | 58 |
| E | Cutout length | 61 |
| F | Fixing length | 64 |
| G | Fixing width | 51 |
| H | Mounting hole diameter | 4.1 |
Only logged in customers who have purchased this product may leave a review.
Gabriel Schembri (verified owner) –
I’ve bought 2 for my stereo armstrong 220, essentially a mullard 5-10 with an ecc83 at the front end. They worked with the stock circuit values, producing a good square wave, no ringing and a good frequency response. They replaced 2 “guitar amp grade” transformers that were smaller, and which required changes to the lead and lag compensation values to stop ringing and overshoot, with a consequential loss of HF.
Buying two of these (stand up version) got me a 20% discount.