Hammond 1650N 60W Push-Pull Parallel Output Transformer, 4.3K CT
Ships from and sold by A5 IT
Exclusive pricing and Net-30 terms. Sign in or create a free account.
Create Free Business AccountKey Features
- 60 W RMS audio, 4,300 ohm CT primary, 318 mA DC per side
- Secondary impedance 4/8/16 ohms
- Push-Pull Par. (2 or 4 Tubes); suggested tubes 6L6GC, 807, 5881, EL34, 6146B, 6550B, KT88
- Frequency response 30 Hz to 30 kHz at full rated power, +/- 1 db max
- Enclosed (shielded), 4 slot, above chassis Type "X" mounting
- Insulated flexible leads, 8 in minimum; plastic coil forms
- Dielectric strength 2000Vrms; -40 to 105C temperature range
- Made in Canada; REACH and RoHS compliant
The 1650N is a 60 W push-pull tube output transformer with a 4,300 ohm centre-tapped primary, 318 mA DC per side and 4, 8 and 16 ohm secondaries. It is listed for push-pull parallel operation with 2 or 4 tubes, and its suggested types run from the 6L6GC, 807, 5881 and EL34 to the 6146B, 6550B and KT88.
Construction follows the classic series design: the transformer is enclosed (shielded), with 4 slot, above chassis Type "X" mounting, plastic coil forms for coil support and insulation, and insulated flexible leads (8 in minimum per the part drawing). Frequency response is 30 Hz to 30 kHz at full rated power, +/- 1 db max (ref. 1 kHz) minimum. Because of the unique interleaving of the windings, both secondary windings must be engaged to meet specifications.
Dimensions from the series table are A 3.13 in (80 mm), B 4.25 in (108 mm), C 3.81 in (97 mm), D 2.50 in (64 mm) and E 2.94 in (75 mm), with 0.20 x 0.38 in mounting slots. Typical electrical data from the drawing includes a primary inductance of 134H / 59KOhm, leakage inductance of 7.72mH, a dielectric strength of 2000Vrms and a temperature range of -40 to 105C. Shipping weight is 8 lbs (3.63 kg).
The 1650N label is marked Made in Canada, and the part is REACH and RoHS compliant. The manufacturer notes that tube operating conditions change the optimum plate-to-plate load, so consult a tube manual or data sheet before choosing an output transformer.
Ideal For
- Push-pull tube hi-fi amplifiers
- Guitar amplifier output stages
- Triode, ultra-linear pentode and tetrode output
- Push-pull parallel multi-tube amplifiers
Overview
| Series | 1608-1650 Series - Tube Output Transformer, Push-Pull Audio (10-280 W) |
| Product Type | Output transformer, push-pull (classic tube type, ultra-linear) |
| Short Description | AUDIO TX 4.3K OHM 60 WATT |
Dimensions
| Dimension A | 3.13 in (80 mm) |
| Dimension B | 4.25 in (108 mm) |
| Dimension C | 3.81 in (97 mm) |
| Dimension D | 2.50 in (64 mm) |
| Mounting Slot G | 0.20 in (5 mm) x 0.38 in (10 mm) |
| Drawing Dimensions | 3.125 ±0.063, 2.500 ±0.063, 3.813 ±0.063, 4.250 ±0.125, 2.940 ±0.063 in |
| Weight (Spec Table) | 8 lbs |
| Dimension E (+/- 1/16") | 2.94 in (75 mm) |
| Mounting Slot (Drawing) | Ø0.203 x 0.375 in |
Electrical
| Operation | Push-Pull Par. (2 or 4 Tubes) |
| Test Conditions | All graphs input level 27dBu @ 1.0 kHz reference; results typical, subject to normal manufacturing and electrical tolerances |
| Audio Watts (RMS) | 60 |
| Frequency Response | 30 Hz to 30 kHz at full rated power (+/- 1 db max - ref. 1 kHz) minimum |
| Dielectric Strength | 2000Vrms |
| Maximum DC Per Side | 318 ma. |
| Suggested Tube Types | 6L6GC, 807, 5881, EL34, 6146B, 6550B, KT88 |
| DCR Primary Blue-Brown | 82.5 Ohms |
| Measurement Instruments | dScope Series III Audio Analyzer; Wayne Kerr 3255B with 3265B Inductance Analyzer; HP 4192a LF Impedance Analyzer; Keithley 2010 DVM |
| Primary Impedance (Ohms) | 4,300 ct |
| DCR Secondary Black-Green | 0.230 Ohm |
| Secondary Connection Note | Both secondary windings must be engaged to meet specifications (unique interleaving of the windings) |
| Secondary Impedance (Ohms) | 4-8-16 |
| DCR Secondary Black/Yel-Yel | 0.370 Ohm |
| Output Power (Typical, Drawing) | 60 Watts |
| Input Impedance (Typical, Drawing) | 4300 Ohms |
| Leakage Inductance @ 60Hz, 10.0V SC | 7.72mH (Primary Brown-Red) |
| Output Impedance (Typical, Drawing) | 4, 8 & 16 Ohms |
| Inductance | Impedance @ 60Hz, 10.0V OC | 134H | 59KOhm (Primary Brown-Red) |
Identifiers
| UPC | 623980301808 |
| UNSPSC | 39121301 |
| Part Number | 1650N |
Packaging & Shipping
| Shipping Weight | 8 lbs (3.63 kg) |
Construction & Finish
| Leads | Insulated flexible leads, 8" min. (part drawing) |
| Mounting | 4 slot, above chassis Type "X" mounting |
| Enclosure | Enclosed (shielded) |
| Coil Forms | Plastic coil forms for coil support and insulation |
Environmental & Protection
| Temperature Range | -40 To 105C |
Compliance & Certifications
| RoHS Compliant | Yes |
| REACH Compliant | Yes |
Purchasing this for your business?
Business account holders get access to exclusive pricing, volume discounts, and dedicated support. Create a free account to get started.
Frequently Asked Questions
What are the primary and secondary impedances of the 1650N?▾
The primary is 4,300 ct ohms and the secondary offers 4-8-16 ohm taps.
Which tubes is it suggested for?▾
Suggested tube types are 6L6GC, 807, 5881, EL34, 6146B, 6550B, KT88, in Push-Pull Par. (2 or 4 Tubes) operation. The manufacturer advises consulting a tube manual or data sheet first, since operating conditions change the optimum plate-to-plate load.
Do I need to connect both secondary windings?▾
Yes. Due to the unique interleaving of the windings, both secondary windings must be engaged to meet specifications; see the hook-up diagrams.
How is the 1650N mounted?▾
It is enclosed with 4 slot, above chassis Type "X" mounting; the drawing shows Ø0.203 x 0.375 in slots.
What is the difference between the 1650N and the 1650P?▾
Both are 60 W. The 1650N has a 4,300 ohm CT primary, 318 mA DC per side and is listed for 2 or 4 tubes in push-pull parallel; the 1650P has a 6,600 ohm CT primary, 200 mA DC per side and is listed for 2 tubes.
Related Products
Save 52%1650M — Output transformer, push-pull, 60W , primary 1,400CT/800CT, 318 ma., secondary 4-8-16
Hammond Manufacturing · 1650M
Save 52%1650P — Output transformer, push-pull, 60W , primary 6,600 ct, 200 ma., secondary 4-8-16
Hammond Manufacturing · 1650P
Save 52%1650K — Output transformer, push-pull, 50W , primary 3,400 ct, 318 ma., secondary 4-8-16
Hammond Manufacturing · 1650K
Save 52%1650R — Output transformer, push-pull, 100W , primary 5,000 ct, 318 ma., secondary 4-8-16
Hammond Manufacturing · 1650R
Save 52%1650H — Output transformer, push-pull, 40W , primary 6,600 ct, 200 ma., secondary 4-8-16
Hammond Manufacturing · 1650H