Hammond 1650H 40W Push-Pull Tube Output Transformer, 6.6K 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
- 40 W RMS audio, 6,600 ohm CT primary, 200 mA DC per side
- Secondary impedance 4/8/16 ohms
- Push-Pull (2 Tubes); suggested tubes 6L6GC, 807, 5881, EL34
- 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 1650H is a 40 W push-pull tube output transformer with a 6,600 ohm centre-tapped primary, 200 mA DC per side and 4, 8 and 16 ohm secondaries. It moves up to the larger 3.13 in frame and is suggested for two-tube push-pull stages using the 6L6GC, 807, 5881 or EL34.
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 4.00 in (102 mm), C 3.81 in (97 mm), D 2.50 in (64 mm) and E 2.69 in (68 mm), with 0.20 x 0.38 in mounting slots. Typical electrical data from the drawing includes a primary inductance of 245H / 108KOhm, leakage inductance of 10.60mH, a dielectric strength of 2000Vrms and a temperature range of -40 to 105C. Shipping weight is 6.5 lbs (2.95 kg).
The 1650H 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
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 6.6K OHM 40 WATT |
Dimensions
| Dimension A | 3.13 in (80 mm) |
| Dimension B | 4.00 in (102 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, 4.000 ±0.125, 2.688 ±0.063 in |
| Weight (Spec Table) | 6.5 lbs |
| Dimension E (+/- 1/16") | 2.69 in (68 mm) |
| Mounting Slot (Drawing) | Ø0.203 x 0.375 in |
Electrical
| Operation | Push-Pull (2 Tubes) |
| Test Conditions | All graphs input level 27dBu @ 1.0 kHz reference; results typical, subject to normal manufacturing and electrical tolerances |
| Audio Watts (RMS) | 40 |
| 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 | 200 ma. |
| DCR Primary Red-Blue | 77.0 Ohms |
| Suggested Tube Types | 6L6GC, 807, 5881, EL34 |
| DCR Primary Brown-Red | 68.0 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) | 6,600 ct |
| DCR Secondary Black-Green | 0.160 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 | 0.272 Ohm |
| Output Power (Typical, Drawing) | 40 Watts |
| Input Impedance (Typical, Drawing) | 6600 Ohms |
| Leakage Inductance @ 60Hz, 10.0V SC | 10.60mH (Primary Brown-Red) |
| Output Impedance (Typical, Drawing) | 4, 8 & 16 Ohms |
| Inductance | Impedance @ 60Hz, 10.0V OC | 245H | 108KOhm (Primary Brown-Red) |
Identifiers
| UPC | 623980301600 |
| UNSPSC | 39121301 |
| Part Number | 1650H |
Packaging & Shipping
| Shipping Weight | 6.5 lbs (2.95 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 1650H?▾
The primary is 6,600 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, in Push-Pull (2 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 1650H mounted?▾
It is enclosed with 4 slot, above chassis Type "X" mounting; the drawing shows Ø0.203 x 0.375 in slots.
How many output tubes is the 1650H intended for?▾
It is listed for push-pull operation with 2 tubes, with suggested types 6L6GC, 807, 5881 and EL34.
Related Products
Save 52%1650F — Output transformer, push-pull, 25W , primary 7,600 ct, 128 ma., secondary 4-8-16
Hammond Manufacturing · 1650F
Save 52%1650K — Output transformer, push-pull, 50W , primary 3,400 ct, 318 ma., secondary 4-8-16
Hammond Manufacturing · 1650K
Save 52%1645 — Output transformer, push-pull, 30W , primary 5,000 ct, 128 ma., secondary 4-8-16-70V
Hammond Manufacturing · 1645
Save 52%1650M — Output transformer, push-pull, 60W , primary 1,400CT/800CT, 318 ma., secondary 4-8-16
Hammond Manufacturing · 1650M
Save 52%1620 — Output transformer, push-pull, 20W , primary 6,600 ct, 158 ma., secondary 4-8-16
Hammond Manufacturing · 1620