Hammond 2013 25W Push-Pull Tube Modulation Transformer
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Create Free Business AccountKey Features
- 25 W modulation transformer for push-pull modulator stages
- 10000 ohm C.T. primary impedance
- Secondary taps: 3000, 5000, 6500 and 8000 ohms
- Tapped secondary carries full class C plate current, 100 mA DC max
- Sealed "gapped" core design
- Minimum frequency response of 150-7000 Hz
- Typical tubes: 6V6, 6L6, 807, 5881, EL34
The 2013 is a 25 watt modulation transformer from Hammond's 2000 Series, designed to couple a push-pull audio modulator stage to a class C RF amplifier. Typical modulation push-pull tube types listed for it are the 6V6, 6L6, 807, 5881 and EL34, which makes it relevant to amateur radio builders and restorers of AM plate-modulated transmitters.
The primary impedance is 10000 ohms centre-tapped. The secondary is tapped for 3000, 5000, 6500 and 8000 ohms, giving a range of taps to match a variety of modulated tube types and operating conditions. The tapped secondary winding carries the full class C plate current, with a maximum secondary DC current of 100 mA.
Construction is a sealed "gapped" core modulation transformer design, and the series specifies a minimum frequency response of 150 to 7000 Hz, covering the speech range used for AM modulation.
When choosing a tap, match the secondary impedance to the load presented by the modulated class C stage; the four taps from 3000 to 8000 ohms give flexibility across tube types. Keep the DC current through the secondary within the 100 mA maximum listed for this part.
The 2013 has a shipping weight of 1.2 lbs (0.54 kg) and is listed as REACH compliant and RoHS compliant.
Ideal For
- AM plate modulation of class C amplifiers
- Push-pull 6L6, 6V6, 807, 5881 or EL34 modulators
- Amateur radio transmitter builds
- Vintage transmitter restoration
Overview
| Series | 2000 Series - Modulation Transformers |
| Part Number | 2013 |
| Long Description | Modulation transformer, 25W, primary 10000 C.T., secondary 3000, 5000, 6500, 8000 |
| Short Description | MODULATION TRANS |
Electrical
| Power Rating | 25 W |
| Primary Impedance | 10000 ohms C.T. |
| Secondary Winding | Tapped; carries full class C plate current |
| Frequency Response | 150-7000 Hz minimum |
| Secondary Impedance | 3000, 5000, 6500, 8000 ohms |
| Max. Secondary Current DC | 100 mA |
| Typical Modulation Push-Pull Tube Types | 6V6, 6L6, 807, 5881, EL34 |
Identifiers
| UPC | 623980186276 |
| UNSPSC | 39121301 |
Packaging & Shipping
| Shipping Weight | 1.2 lbs (0.54 kg) |
Construction & Finish
| Core | Sealed "gapped" core |
Compliance & Certifications
| RoHS Compliant | Yes |
| REACH Compliant | Yes |
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Frequently Asked Questions
What is the 2013 used for?▾
It is a modulation transformer for a push-pull modulator stage, with a tapped secondary that carries the full class C plate current of the modulated stage.
Which tubes is the 2013 intended for?▾
Typical modulation push-pull tube types listed are 6V6, 6L6, 807, 5881 and EL34.
What impedances does the 2013 provide?▾
Primary 10000 ohms C.T.; secondary taps of 3000, 5000, 6500 and 8000 ohms.
How much DC current can the secondary carry?▾
The maximum secondary DC current is 100 mA.
What frequency range does it cover?▾
The series specifies a minimum frequency response of 150-7000 Hz.
What does the 2013 weigh?▾
The shipping weight is 1.2 lbs (0.54 kg).
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