1:1 Microphone Input Transformer, Jensen Transformers JT-MB-CA

Description

Jensen Transformers JT-MB-CA 1:1 Microphone Input Transformer
for Ultra-low Noise Amplifiers
Jensen Transformers JT-MB-CA 1:1 Microphone Input Transformer
The Jensen Transformers JT-MB-CA 1:1 Microphone Input Transformer features a dual Faraday shield for very high CMMR of 122 dB at 60 Hz, as well as a 30 dB magnetic shield.  The wire leads and included angle bracket mounting hardware make it perfect for DIY projects.  Also available in a PCB mounting style (cart option below).
Like all Jensen microphone input transformers, the JT-MB-CA offers legendary sonic transparency. Internal Faraday shielding virtually eliminates hum, buzz, and RF interference, while MuMETAL® magnetic shielding cans reduce hum caused by nearby magnetic fields. Optimized noise performance is ensured by matching the step-up turns ratio to you input stage design.  Extended low-frequency and Bessel-tailored high-frequency response results in the ultra-low time-domain distortion (DLP) that only Jensen offers. Insertion loss is minimal and adding phantom power is simple.
Here are some specs:
Impedance ratio: 150:150
Turns ratio: 1:1
Maximum 20 Hz input: +2dBu
THD @ 20 Hz: 0.045 %
20 Hz re:1 kHz: -0.10 dB
20 kHz re:1 kHz: -0.04 dB
This transformer is also available in a PCB mounting style as JT-MB-CPCA.
With inferior products coming from all over the world, we think it is a genuine treasure to find a company like Jensen Transformers, actually designing and manufacturing some of the finest products in the world, right here in the USA, and we are proud to be able to offer their products. The JT-MB-CA is made in the USA, is backed by the manufacturer's comprehensive one-year warranty, and has a remarkable 20-year warranty on the transformer device itself.
Jensen Transformers' Description
Jensen Transformers JT-MB-CA
Microphone Input Transformer
1:1 FOR ULTRA-LOW NOISE AMPLIFIERS
Ideal retrofit to solve problems with transformerless preamps
Dual Faraday shields provide very high CMRR: 122 dB at 60 Hz
Eliminates complex circuitry required to block 'phantom' power
Excellent frequency response and time domain performance
Low transformer related Noise Figure
This transformer is designed to couple a nominal 150 O mic to the 3 kS input impedance typical of 'transformerless' preamps. Both windings are fully balanced and either may be reversed to invert polarity. A 30 dB magnetic shield package is standard. Not recommended for mic 'splitter' applications (use JT-MB-C).
Here is a good look at the wire leads.
This shows how the included angle bracket mounting hardware works.
Here is the JT-MB-CA spec sheet.  PDF format.
Why Cable Solutions?
Cable Solutions is an Authorized Jensen Transformers Distributor, so our customers are ensured full warranty protection and technical support.  (Jensen Transformers is obligated to provide neither warranty nor technical support for products purchased from unauthorized resellers!)
We stock this item locally so that it will be ready for immediate shipment, and no one works harder than we do to get your order shipped out to you fast! On business days, orders that are funded by noon will ship the same day.  Orders funded on weekends or holidays will ship the next business day.
Customer service is our first priority.  We do our best to help you find the best solutions for your particular application. We're enthusiasts too, so we know what it's like to wait for cables and accessories that are needed to hook up new gear. We also know how important it is to be able to get a response when you need help, so you'll often find us working long hours in an effort to get you the answers that you need.
If you have had enough of outsourced support or worse yet, companies that do not even publish a phone number or a functional email address, we think you will be absolutely delighted that you found our company. We know how important it is to be able to get help when you need it. That's why we have people, right here in Texas, ready to respond to your email or answer your phone call. If English is your language of choice, you will have the simple pleasure of communicating with people whose first language is English. Granted, if you call on the phone, you may detect more than a trace of a Texas accent, but that is to be expected when dealing with a family-owned business run by native Texans. We sincerely hope that you will find our heritage of courtesy, honesty, and an ethical way of doing business to be a refreshing experience.
Design excellence, high quality materials, meticulous workmanship, and superior service...put it all together and you get a superior product. Don't get stuck with bad advice, poor service, slow shipment or an inferior product. If you want the best, here it is.
Shipping/Handling
USA Customers
We are offering free shipping via USPS Priority Mail, an air service that provides one to three day delivery to USA addresses.
If you need even faster delivery, we also offer Express Mail, which provides overnight delivery to most (but not all) USA addresses.
If you are more comfortable with private carriers, we are also offering UPS.
Please refer to the Shipping and handling section to see the exact services, rates and transit times.
International Customers
This item will ship via eBay GSP (Global Shipping Program). This is a premium shipping service where your total cost, including import duties and taxes, are known and paid during checkout. eBay assumes full responsibility for the safe delivery of your shipment.
Please refer to the Shipping and handling section for calculated rates and transit times to your country.
Warranty
Manufacturer's Warranty Statement
For a period of 1 YEAR after purchase, Jensen Transformers, Inc. will, free of charge, repair or replace any part of an ISOMAX® product that fails due to defective materials or workmanship.
For a period of 20 YEARS after purchase, Jensen Transformers, Inc. will, free of charge, repair or replace any Jensen OEM transformer or any Jensen transformer contained in an ISOMAX® product that fails due to defective materials or workmanship.
Both limited warranties are subject to the following limitations:
1. Defects that are, in the sole judgment of Jensen, the result of accident, misuse, abuse, neglect, mishandling, misapplication, faulty installation, unauthorized repair, modification, or acts of God will not be covered by this warranty.
2. In the absence of proof of date of purchase, the date of manufacture (as determined from lot numbers of internal parts and the records of Jensen Transformers, Inc.) shall be used in its place.
3. There are no express warranties except as listed above.
4. JENSEN TRANSFORMERS, INC. SHALL NOT BE LIABLE FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES RESULTING FROM THE USE OF THIS PRODUCT OR ARISING OUT OF THE BREACH OF THIS WARRANTY. Duration of implied warranties, if any, is limited to 12 months.
If a problem develops with this product during the warranty period, call or write us before attempting any repair. We can help you identify specific problems, and possibly solve the problem, before the unit is returned to us for repair or replacement. In any case, DO NOT RETURN THE UNIT WITHOUT AUTHORIZATION and instructions from us. Jensen cannot be responsible for damage due to shipping or improper packaging.
Warranty Assistance
USA Customers
Jensen Transformers typically does a very fine job of handling warranty issues, but if you prefer to deal with Cable Solutions, we will be pleased to handle the matter for you.
International Customers
Please notice that most of our electronic equipment carries a USA warranty, so all international warranty issues must be handled by Cable Solutions.  This means that you must return the item to Cable Solutions for all warranty repair or replacement issues. You will be responsible for all shipping/handling expenses.
All Customers
Return Merchandise Authorization (RMA) is required for all returns handled by Cable Solutions. Please contact us for authorization and instructions.
Return Policy
eBay-Managed Returns
Unless otherwise noted, all returns are governed by the terms of the eBay-managed return process, as described in eBay's portion of this item page.
The following information applies only to items that are not governed by the eBay-managed return process:
Defective Merchandise
Defective merchandise will be repaired or replaced as described above.
Non-defective Merchandise
All non-defective returns are subject to restocking fees.  Here are some examples of the fees:
Un-opened merchandise
All un-opened returns are subject to a 10% (minimum) restocking fee.
Opened merchandise
B-Stock or "open box" electronic devices - 15% (minimum)
New electronic devices - 20% (minimum)
Manufactured cables that are packaged in a reusable container - 15% (minimum)
Manufactured cables that are packaged in a non-reusable container - 20% (minimum)
Shipping/handling fees are not refundable and you will be responsible for all shipping/handling expenses related to the return.  In the case of items with "free shipping", customary shipping/handling fees will be added to your restocking fees.
In order to qualify for the rates shown above, we must receive your return within the first 14 days following the day you receive your order.  In cases where the item is returned incomplete, or in less than perfect condition, we will evaluate the restocking fees on a case by case basis.
Return Merchandise Authorization (RMA) is required for all returns.  Please contact us for authorization and instructions.
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