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290MX is listed in the Power Transformers range at ChipApex. The manufacturer field lists Hammond Manufacturing. Its product description is PWR XFMR LAMINATED CHAS MT. Review the specifications below when checking this part for your BOM.
Power Transformers specifications for 290MX
- Description：PWR XFMR LAMINATED CHAS MT
- Series：290
- Mfr：Hammond Manufacturing
- Package：Box
- Type：Laminated Core
- Voltage - Primary：120V, 240V
- Voltage - Secondary (Full Load)：550V, 6.3V, 5V
- Current - Output (Max)：230mA, 6A, 3A
- Primary Winding(s)：Dual
- Secondary Winding(s)：Triple
- Center Tap：Yes
- Power - Max：-
- Mounting Type：Chassis Mount
- Termination Style：Wire Leads
- Size / Dimension：63.50mm L x 71.55mm W
- Height - Seated (Max)：77.80mm
- Voltage - Isolation：-
- Weight：7 lbs (3.2 kg)
Power Transformers datasheet and documents for 290MX
Power Transformers Overview
The Hammond Manufacturing 290MX is a power transformer designed for tube guitar amplifiers, specifically serving as a replacement for Vox models. It operates at 50 Hz/60 Hz with a single primary winding rated for 117VAC input. The unit features triple secondary windings providing 260VAC CT and lower voltage outputs. Rated current is 170mA for the high-voltage section. It utilizes pin terminal connections and is intended for chassis mounting.
Power Transformers Feature Summary
- Designed as a direct replacement for Vox guitar amplifier power transformers
- Features triple secondary windings to support tube circuit requirements
- Utilizes pin terminal connections for secure board integration
- Constructed for chassis mounting in industrial control applications
Power Transformers Applications
- Replacement power supply for Vox tube guitar amplifiers
- Audio equipment requiring specific tube filament and plate voltages
- Industrial control systems utilizing tube-based components
Power Transformers Procurement Notes
Verify that the target application requires the specific 260V AC CT output and 170 mA current rating documented for this part number. Confirm that the pin terminal interface matches the existing circuit board layout. Ensure the operating frequency aligns with the 50 Hz or 60 Hz specification. Cross-reference the physical dimensions against the available chassis space before procurement.
Power Transformers Selection Notes
Select this component when replacing failed units in Vox amplifiers where original specifications are critical for tone and safety. Consider the triple secondary configuration if multiple voltage rails are needed. Evaluate the pin terminal style against through-hole assembly requirements. Compare against other 290 series variants only if electrical parameters match exactly.
Power Transformers Part Context
This component belongs to the Hammond 290 series of audio and signal transformers. It is categorized under industrial control transformers and tube application power supplies. The series includes various models tailored for different musical instrument manufacturers, ensuring compatibility with legacy audio equipment designs while meeting modern manufacturing standards.
Power Transformers Replacement Considerations
- 290XXA
Power Transformers FAQ
What is the primary voltage rating?
The primary winding is rated for 117 VAC.
Does this transformer have shielding?
No, the 290MX is an unshielded transformer.
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