OT25SE-HF-3K5-UL Pair for HiFi projects    USA built version installed in FM200 End Bells - fully shielded

This was a custom order that ended up on a slightly smaller bobbin window than requested.  So we rate it 30Hz to 20KHz while capable of a 90mADC current on the larger EI 1-1/8 gapped laminated core.  Our mistake - your opportunity.

This is a new 20VA Single-Ended Tube Output transformer for tube amplifier circuit applications (30Hz to 20KHz) using large bottle power tubes. This version of the transformer is built in USA to an MPS custom design specs & is suitable for many 12 to 20VA Single-Ended HiFi amp circuits looking for a solid USA built output transformer at a reasonable price.  We are using audio grade 29M6 laminations in an E-I 112 x1.56IN  gapped core structure with bobbin wound construction.  It's a 5x interleaved winding with 2K5 Ohm input and 8 ohm output impedance. It's surface mounts by a 4-hole pattern at 2.25in x 2.38in

This is ideally suited to SE circuits looking for up to 90mADC current handling

CONSTRUCTION DETAILS-  

Laminations: 29M6 x EI-112  

Bobbin: EI-112 1 x 1.56 gapped butt stack, Nylon Glass Reinforced UL94V-0

Winding: 5 layer split interleave, perfect layer output windings 

Magnet Wire: MW80 155C or higher

Varnish-Class B 130C

Tapes: 3M #1385 & 3M 27 Glass cloth tapes 

Cover: Bahrs USA FM200 covers

Weight: 3.8 Lbs 

PERFORMANCE  

Operating Voltage 500Vdc

Maximum Output Power: 20VA (90mADC)

Designed Operating Frequency (+/-1dB): 30 to 20000 Hz

HiPot Test Ratings 1000Vac minumum

Input Impedance B+ to Plate: 2500 Ohms 

Output Impedances: 8 Ohms

Application: 12 to 20W SE Amplifiers

Dimension- per drawing

Overall- 3”W x 3.5”D x 3”H

Mounting- 4 holes at 2.25"W x 2.38"L  

Shipping weight will be 8Lb per Pair.  Use shipping calculator below to estimate cost to your location.  Will ship Worldwide. 

Note- US Domestic shipments will be sent via USPS or FEDEX  

eBay will collect US State Sales Tax where required by law.

eBay customs invoice will declare actual price paid and customer is responsible for any duties or fees associated with import to your country.

We will combine shipping for different items purchased the same day via a PayPal refund upon shipment if USPS Flat Rate packaging is used.  Send me a message if you need an estimate.

Payment via PayPal expected upon buy-it-now sale.