1640SE Hammond Manufacturing, 1640SE Datasheet

1640SE

Manufacturer Part Number

1640SE

Description

TRANSFRMR AUDIO 1.25K IMED 25W

Manufacturer

Hammond Manufacturing

Series

1600r

Datasheets

1.1642SE.pdf (2 pages)

2.164D24.pdf (2 pages)

Specifications of 1640SE

Transformer Type

Single Ended Audiophile, Ultra-Linear - Tube Output

Current

200mA

Impedance

1.25K Primary, 4-8-16 Secondary

Insertion Loss

±1dB

Mounting Type

Chassis Mount

Product

Audio Output Transformers

Lead Free Status / RoHS Status

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Single Ended

•

1640SEA

1627SEA

1630SEA

1628SEA

1629SEA

1638SEA

Number

triode tubes.

1642SE

"Over designed" for high-fidelity, single ended, Class-A, tube output circuits (triode, tetrode or pentode tubes).

Enclosed (shielded), four slot, chassis Type "X" mounting.

Frequency response at least 20 Hz. to 20 KHz. at full rated power (+/- 1 db max., ref. 1 Khz.)

Units are designed to provide ample "headroom" at bass frequencies (note the weight of each transformer).

All models have a secondary tapped for 4, 8 or 16 ohm outputs.

Insulated flexible leads 8" min.

For maximum versatility, all units (except the 1642SE & 1638SEA) include a 40% screen tap for Ultra-Linear,

tetrode/pentode operation (if desired).

The 1642SE & 1638SEA do NOT include a screen tap as they were designed principally for high impedance

High quality laminations, (M6) grain oriented silicon steel.

Core is gapped to reduce core saturation in Class-A, tube amplifier circuits.

For general purpose or replacement use in single ended, tube output circuits see our 125 "SE" series.

Part

St. Laurent, Quebec (514) 343-9010

Cheektowaga, NY (716) 630-7030

Guelph, Ontario (519) 822-2960

Audio

Watts

CANADA

Impedance

10,000

USA

1,250

2,500

3,500

5,000

6,500

Audiophile - Tube Output (1627-1642 Series)

"CLASSIC" TUBE OUTPUT - ULTRA-LINEAR

Max. DC

Primary

200 ma.

160 ma.

135 ma.

120 ma.

300 ma.

100 ma.

90 ma.

Bias

Inductance

www.hammondmfg.com

Henrys

SINGLE-ENDED

40% Primary

Ultra-Linear

Tap

Yes

(VRMS)

Hipot

2,000

3,500

2,000

Test

3.75 4.95 4.56 3.00 3.90 .203 x .375

3.75 4.50 4.56 3.00 3.13 .203 x .375

3.75 4.98 4.65 3.00 3.90 .203 x .375

3.75 4.50 4.56 3.00 3.13 .203 x .375

4.38 7.50 5.25 3.50 5.88 .203 x .375

3.75 4.50 4.56 3.00 3.88 .203 x .375

3.75 4.50 4.56 3.00 3.13 .203 x .375

Queenstown, Australia 61-8-8240-2244

Dimensions (Inches)

Basingstoke, UK 01256 812812

AUSTRALIA

EUROPE

Slot

Lbs.

Wt.

Related parts for 1640SE

1640SE Summary of contents

Page 1

... Core is gapped to reduce core saturation in Class-A, tube amplifier circuits. • For general purpose or replacement use in single ended, tube output circuits see our 125 "SE" series. Primary Part Audio Max. DC Number Watts Impedance Bias 1640SEA 30 1,250 200 ma. 1627SEA 30 2,500 160 ma. 1630SEA 30 3,500 135 ma ...

Page 2

... Single Ended Audiophile - Tube Output (1627-1642 Series) Part No. 1640SEA 1627SEA 1630SEA 1628SEA 1642SE 1629SEA 1638SEA Note: The above examples of possible combinations are to help you narrow down the choices of transformers for your favorite tube types. How you operate the tubes (ultra-linear, bias, plate voltage, operating points etc.) will change optimum plate load impedance ...

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