Transformers - Import export

Merefields Supply a very wide range of HONGFA PARTS, please send email to liamm@merefields.com for a Quote. We have over 10 Million Lines of Components in our Supply!

Product Features: • Heavy duty (0.1" thick) aluminium base and top - for extra strength (front and back panel will not push in from mounted buttons, controls, connectors, etc). • Sides include four horizontal rows of louvers for ventilation. • Includes heavy duty (0.1" thick) aluminium raised mounting panel. Mounting surface includes 8 press nuts for mounting and a 5" (127mm) x 8.63" (219mm) area. • Front and back is recessed near the top with flange - to act as built in lifting handles. • Sold pre-assembled in a light textured - dark grey powder coat finish. • Comes with three cord grommets for front and rear holes and required assembly hardware. • Assembled with 8 self-tapping Philips head screws.

Product Features: • Single winding, does not provide isolation, for use where equipment is already isolated and only voltage change is required. • World wide applications, 50 or 60Hz. operation, step up (115VAC to 230VAC). • Input is circuit breaker protected. • Hi-pot tested to 2 KV RMS. • Input is a standard 3-wire, grounded plug (can also be used with adaptors for proper grounding). • Input is connected to a 5 foot cord and standard grounded North American plug (NEMA 5-15P). • Output - Due to U.L. changes in 2007 - New production with the European (Shuko) parts would no longer by U.L. listed. Therefore, Hammond replaced this output receptacle with a one foot long "pig tail" cord with a standard North • American 3-wire, 250V receptacle (NEMA 6-15R) for any production after the first part of 2008. • North American Mark of Safety - C UL and UL listed (File #E211544). • Indoor use only. • Remember - These units do NOT convert line frequency.

Product Features: • Heavy duty design with plastic shell and double wipe contacts. • Indoor use only. • Allows for ground connection between equipment and international power sources. • With a set of all 4 adaptors, they will accept equipment with plugs from virtually every country except South Africa. • Adaptors do not affect voltages, they are a mechanical device only to match foreign "pin-outs" of receptacles and/or plugs.

Product Features: Primary 120VCA, 50/60 Hz., Secondary 240VAC. Provided circuit isolation. • Torodial transformer for high isolation, low noise, light weight cool operation and low profile. • 50 or 60 Hz. operation, step up (120VAC to 240VAC). • Standard 3-wire, grounded plug (can also be used with adaptors for proper grounding). • Input (primary) connected to a 5 foot cord and standard North American plug (NEMA 5-15P). • Output (Secondary) connected to a standard North American duplex - 3 wire grounded receptacle (NEMA 6-15R). • Transformer Hi-Pot test of 4,000V RMS between primary and secondary. • Features include ventilated black steel case with rocker lighted on-off switch and circuit breaker protected output. • North American Mark of Safety - C UL and UL listed (File #E211544). • Indoor use only. • Remember - These units do NOT convert line frequency.

Product Features: • Primary 240VAC, 50/60 Hz., Secondary 120VAC. • Provides circuit isolation. • Toroidal transformer for high isolation, low noise, light weight, cool operating and low profile. • World wide applications, 50 or 60 Hz. operation, step down (240VAC to 120VAC). • Standard 3-wire, grounded plug (for use with adaptors for proper grounding). • Input (Primary) connected to a 5 foot long cord and standard 250V 2 pole, 3 wire - North American plug (NEMA 6-15P). • Output (Secondary) connected to two standard - 3 wire grounded receptacles (NEMA 5-15R). • Features include ventilated black steel case, rocker lighted on-off switch and circuit breaker protected output. • North American Mark of Safety - C UL and UL listed (File #E211544). • Indoor use only. • Remember - These units do NOT convert line frequency.

Product Features: • Primary 240VAC, 50/60 Hz., Secondary 240VAC. • Provides circuit isolation. • Toroidal transformer for high isolation, low noise, light weight, cool operation and low profile. • World wide applications, 50 or 60 Hz. operation (240VAC to 240VAC). • Standard 3-wire, grounded plug (for use with adaptors for proper grounding). • Input (Primary) connected to a 5 foot long cord and standard North American Plug (NEMA 6-15P). • Output (Secondary) connected to a standard - 3 wire grounded duplex receptacle (NEMA 6-15R). • Features include ventilated black steel case, rocker lighted on-off switch and circuit breaker protected output. • North American Mark of Safety - C UL and UL listed (File #E211544). • Indoor use only. • Remember - These units do NOT convert line frequency.

Product Features: • Primary 120VAC, 50/60 Hz., Secondary 120VAC. • Provides circuit isolation. • Toroidal transformer for high isolation, low noise, light weight, cool operation and low profile. • World wide applications, 50 or 60 Hz. operation, step down (120VAC to 120VAC). • Standard 3-wire, grounded plug (for use with adaptors for proper grounding). • Input (Primary) connected to a 5 foot long cord and standard North American plug (NEMA 5-15P). • Output (Secondary) connected to two standard - 3 wire grounded receptacles (NEMA 5-15R). • Features include ventilated black steel case, rocker lighted on-off switch and circuit breaker protected output. • North American Mark of Safety - C UL and UL listed (File #E211544). • Indoor use only. • Remember - These units do NOT convert line frequency.

Product Features: • Single winding, does not provide isolation, for use where equipment is already isolated and only voltage change is required. • World wide applications, 50 or 60 Hz. operation, step down (230VAC to 115VAC). • Input is circuit breaker protected. • Hi-pot tested to 2 KV RMS. • Input is a standard 250V North American, 3-wire, grounded plug (can also be used with adaptors for proper grounding). • Input on "-NA" version - connected to a 5 foot cord and grounded North American 250V plug (NEMA 6-15P). • Output connected to a one foot long "pig tail" cord with standard North American 115V - 3 wire grounded receptacle (NEMA 5-15 R). • North American Mark of Safety - C UL and UL listed (File #E211544). • Indoor use only. • Remember - These units do NOT convert line frequency.

Product Features: • Primary 230VAC, 50/60 Hz. Secondary 115VAC. • Circuit breaker in primary. • Provides circuit isolation and steps down primary voltage. • Hi-pot tested to 2 KV RMS. • Electrostatic shield between primary and secondary. • Input (Primary) connected to a 5 foot long cord and European (Schuko) grounded plug - note: Old inventory only. • Input - due to U.L. changes in 2007 - New production with the European (Shuko) parts would no longer be U.L. listed. Therefore, we have replaced this input plug with a standard North American 3-wire, 250V plug (NEMA 6-15P). • Output (Secondary) connected to a 1 foot long cord and standard North American 3-wire grounded receptacle (NEMA 5-15R). • North American Mark of Safety - C UL and UL listed (File #E211544). • Indoor use only. • Remember - These units do NOT convert line frequency.

Product Features: • Primary 115VAC, 50/60 Hz., Secondary 115VAC. • Provides complete circuit isolation. • Electrostatic shield between primary and secondary to greatly attenuate • surges and noise. • Hi-pot tested to 2 KV RMS. • Circuit breaker in primary. • Standard 3-wire, grounded plug and receptacle. • Input (Primary) connected to 5 foot long cord and standard North American plug (NEMA 5-15P). • Output (Secondary) connected to a foot long "pig tail" cord, 3-wire, standard North American grounded receptacle (NEMA 5-15R). • North American Mark of Safety - C UL and UL listed (File #E211544). • Indoor use only. • Remember - These units do NOT convert line frequency.

Product Features: • Single winding, does not provide isolation, for use where equipment is already isolated and only voltage change is required. • Flexible world wide applications, 50 or 60 Hz. operation, step down (230VAC to 115VAC) or step up (115VAC to 230VAC). • Totally enclosed rear case, includes handy internal grounding bolt. • Extra vacuum varnish for use in high humidity. • Includes a rear mounted (but not wired), standard 115VAC, 3-wire receptacle. • Enclosed case with convenient knockouts and includes two cable clamps allowing for easy wire connections. • Models 170SE, 170AW, 170BE, 170CE and 170DE are CSA certified (209651). • Connection by flexible leads, 8" minimum length. • Remember - These units do NOT convert line frequency.

Product Features: • Single winding, does not provide isolation, for use where equipment is already isolated and only voltage changed is required. • Flexible world wide applications, 50 or 60 Hz. operation, step down (230VAC to 115VAC) or step up (115VAC to 230VAC). • Connections by flexible leads, 8" minimum length. • Models 170A, 170B, 170C and 170D are CSA certified (209651). • Remember - These units do NOT convert line frequency.

Product Features: • Primary 115VAC, 60 Hz., Secondary 115VAC. • Electrostatic shield between primary and secondary. • Connection by flexible leads, 8" minimum length. • Perfect for circuit isolation or "Classic" bias power supply. • CSA certified (209651).

Product Features: • Primary 115VAC, 60 Hz. • Secondary taps @ 90, 100, 110, 115, 120 and 130 VAC. • Electrostatic shield between primary and secondary. • Connection by flexible leads, 8" minimum length. • Perfect for critical line voltage needs (examples: Older "Classic" tube equipment or Japanese 100V equipment). • CSA certified (#LR3902) - except 169J. • Remember - These units do NOT convert line frequency.

Product Features: • Single winding, does not provide isolation, for use where equipment is already isolated and only voltage change is required. • Flexible world wide applications, 50 or 60 Hz. operation, 115VAC input. • Output taps @ 85, 95, 105, 110, 115 and 125VAC. • Ideal for manual line voltage adjustment for electronic equipment or small appliance operation. • Models 168B, 168C and 168D are CSA certified (209651). • Connection by flexible leads, 8" minimum length. • Remember - These units do NOT convert line frequency.

Product Features: • Used to measure the voltage of 120 VAC systems with 5 Volt full scale A.C. voltmeters. • 50/60 Hz. operation. • Choice of chassis mount or P.C. board pin mount. • High accuracy windings (1%). • VA rated for 0.020 VA.

Product Features: • Toroidal design. • Supplied with 24" insulated secondary leads, terminated with crimped ring connectors. • Suitable for use with bare (uninsulated) primary conductor in circuits up to 600 V (4 KV Hi pot); or at higher voltage when a suitably insulated conductor is used. • All units have 5 A secondary for use with standard AC ammeters with 5 A movements. • Two hole mounting bracket on all models. • UL E227616 volume #1 file number X0DW2

Product Features: • "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). • Insulated flexible leads 8" min. • For maximum versatility, all units (except the 1642SE and 1638SEA do NOT include this screen tap as they were designed principally for high impedance triode tubes. • High quality laminations, (M6) grain oriented silicon steel. • Core is gapped to reduce core saturation in Class-A tube amplifier circuits.

Product Features: • Designed for push-pull tube output circuits. • Units are designed to provide ample "headroom" at bass frequencies (note the weight of each transformer). • All models have a secondary tapped fro 4, 8 or 16 ohm outputs. • Enclosed (Shielded), 4 slot, above chassis Type "X" mounting. • Manufactured with plastic coil forms for coil support and insulation. • Frequency response 30 Hz. to 30 Khz. at full rated power (+/- 1 db max. - ref. 1 Khz.) minimum. • Insulated flexible leads 8" min. • All units (except the 1650G) include 40% screen taps for Ultra-Linear operation (if desired). • Typical applications - Push-Pull: triode, Ultra-Linear pentode, pentode and tetrode connected audio output. The 1650G does NOT have primary screen taps and will not support "Ultra Linear" applications.

Product Features: • Designed for push-pull tube output circuits. • Enclosed (shielded), 4 slot, above chassis Type "X" mounting. • Frequency response 30 Hz. to 30 Khz. at full rated power (+/- 1 db max. - ref. 1 Khz.) minimum. • Insulated flexible leads 8" min. • Manufactured with plastic coil forms for coil support and insulation. • Typical applications - Push-Pull: triode, Ultra-Linear pentode, pentode and tetrode connected audio output. • Due to the unique interleaving of the windings BOTH secondary windings must be engaged to meet specifications.

Product Features: • Small, economical, open, two hole horizontal bracket mount. • Insulated, colour coded flexible leads, 4" long minimum (143, 144 and 145 Series) or 3" long minimum (146 Series). • Frequency response 150 Hz. to 15 Khz. (+/- 1 db, reference 1000 Hz.). • When operating at impedances below nominal, power capability and the frequency spectrum are proportionately lower, conversely, at higher impedances power capability and frequency spectrum will be proportionately higher. • Net weight: 0.5 oz. (143, 144, 146 Series) and 1.4 oz. (145 Series).

Product Features: • Designed for general purpose or replacement use in Push-Pull tube output circuits. • Frequency response: 150 Hz. - 15 Khz at full rated power (+/- 1 db max. ref. 1 Khz). • Open style with minimum 5" long primary leads. • Secondary solder lugs for convenient secondary connections (except 125B - uses minimum 5" secondary leads). • Primary impedances from 1,200 to 25,000 Ohms. • Secondary impedances from 1.5 to 15 Ohms.

Product Features: • Designed for drop in replacement of original units. • Physically, parts were designed to look similar to original factory units (where possible). • Material used and design specs. were kept as close as possible to the original part to preserve the stock "tone". • Output transformers marked UPGRADE allow for more versatility by added secondary connections that did not exist on the original units.

Product Features: • Designed for push-pull tube output circuits. • Enclosed in a drawn steel case, the transformer is completely potted in epoxy. • Frequency response 30 Hz. to 30 Khz. at full rated power (+/- 1 db max. ref. • 1 Khz) minimum. • Lead connection is via 10 bottom mounted lugs. • All units include 40% screen taps for Ultra-Linear operation (if desired). • Finished in a black powder paint (to match the 300P Series power transformers). • Typical applications - Push-Pull: triode, Ultra-Linear pentode, pentode and tetrode connected audio output.

Product Features: • Designed with nickel alloy cores for high performance and Wide Bandwidth. • Frequency Response: 20 Hz - 20 kHz ±0.35 dB, (ref. @ 1 kHz). • Low distortion at levels up to +27 dBu @ 20 Hz. • Excellent Shielding - Mu Metal Enclosures. • Line Output Transformers are open style (not Mu Metal).

Product Features: • Deep-drawn steel case with tin plated finish, with two convenient 6-32 mounting studs with mounting hardware. • Sealed case and wax potted core internally for stable characteristics and long life. • Wide frequency response +/- 0.5 db max. from 20 Hz. to 20 Khz. (except units over 5K ohms impedance, amy be down 1 db @ 20 Khz.). • Insertion loss of apx. 1 db. • Maximum power level +15 dbm. with specified characteristics, or higher levels with reduced low frequency performance. • Distortion is apx. 1.5% @ 20 Hz. under full power. • Electrostatic shield between pri. and sec. connected to the green lead. • Humbucking construction. • Balanced split windings on pri. and sec. for circuit versatility. Primary may be used as a secondary and vice vera for impedance matching. • Includes mounting hardware. • Lead length: Min. 4". • Shipping weight 0.4 lb. (0.18 kg).

Product Features: • Deep-drawn steel case with tin plated finish, with two convenient 6-32 mounting studs with hardware. • Includes wire leads (minimum length of 4"). • Frequency response +/- 0.5 db max. from 50 Hz. to 15 Khz. • Insertion loss of apx. 1 db. • Maximum power level +15 dbm. (except 841A, 842A and 844A which are +20 dbm) with specified characteristics, or higher levels with reduced low frequency performance. • Electrostatic shield between prim. and sec. • Humbucking construction. • Balanced split windings on pri. and sec. for circuit versatility. Primary may be used as a secondary and vice versa for impedance matching. • Overall dimensions 1.75" (44.5mm) wide x 1.25" (31.8mm) deep x 2.56" (65mm) high max. • Shipping weight 0.5 lbs (0.2 kg).

Product Features: • Rugged black epoxy potted case with 9 pin connections (.025" square by 0.5" long). • Frequency response minimum @ 0 dbm +/- 1 db max. (+/- 0.5 db is typical) of 30 Hz. to 30 Khz., except 560Q which is 30 Hz. to 15 Khz. • Higher signal levels possible with reduced low frequency performance. • Insert loss of 1 db maximum. • Electrostatic shield between primary and secondary connected to core and brought out to pin "SH". • Humbucking construction. • Balanced split windings on pri. and sec. for circuit versatility. • Primaries and secondaries can be reversed for impedance matching. • Overall dimensions 1.64" (41.7mm) x 1.33" (33.8mm) x 0.85" (21.6mm) high max. • Shipping weight 4 oz. (0.1 kg).