Iron Powder and ferrite cores, rods, cores, bobbins, chokes, kits, and price lists.

BALUNs
Balanced to Unbalanced transformers description, shopping cart and prices

UNUNs
Unbalanced to Unbalanced transformers description, shopping cart and prices

Price sheet
List of CWS ByteMark products, prices and shopping cart

Pay me securely with any major credit card through PayPal!

CWS ByteMark products consists of:

• Iron Powder Toroidal Cores for RF Applications

• Iron Powder Toroidal Cores for Power Conversion and Line Filter Applications

• Ferrite Shielding Beads for RFI / EMI Suppressions

• Round Cable and Flat Cable RFI / EMI Suppression Cores

• Iron Powder Tunable Inductor Coil Forms

• Ferrite Toroidal Cores

• Wideband Multi-Aperature BALUN Cores

• 'E' Cores for Inductors, Chokes, Power Supplies

• Ferrite Pot Cores for Inductors and Power Supplies

• Bobbin Coil Forms

• Ferrite Rods

• Molypermalloy (MPP) Toroidal Cores for Output Choke and Inductors

• Sendust / Koolmu Toroidal Cores for Chokes and Inductors

• High Flux Toroidal Cores for Chokes and Inductors

• Telephone Filters, Chokes, Antenna Balun Kits, and Experimenter Kits

• Insulating Tapes and Wires

• Accessories such as connectors

• Books for ham radio operators and experimenters

CWS ByteMark has been supplying iron powder and ferrite products to the Ham Radio communities around the world for over 30 years. CWS ByteMark's iron powder products are used in many electronic circuits in the communication industries. CWS ByteMark's ferrites are used to suppress RFI noise, and to prevent RFI due to ham radio transmission. Please click Iron Powder & ferrites Cores, Rods icons (links) on your left for more information and prices. All the items listed in the price sheet are available from stock for delivery around the world. No minimum order requirement for orders placed with credit cards. Small quantities are delivered by Air Parcel Posts. Larger quantities are delivered by U.P.S., or other courier services, Sea Freight or Air freight.

CWS ByteMark's Baluns (Balanced to Unbalanced) and Ununs (unbalanced to unbalanced) transformers are developed jointly with Dr. Jerry Sevick, W2FMI, who is known worldwide for his work on transmission line transformers. These Baluns and Ununs are probably the most efficient high power impedance matching transformers available in the world. They have an efficiency of 98% to 99%, and will enable you to achieve high signal strength in your systems. CWS ByteMark offer the widest and most comprehensive selections of these Baluns and Ununs.

Background on BALUNS and UNUNS
Baluns and ununs (unbalanced-to-unbalanced transformers) belong to a class of matching devices known as transmission line transformers. They transmit the energy from input to output by a transmission line mode instead of by flux linkages as in the case of conventional transformers. When properly designed, they can have extremely high efficiencies and very broad bandwidths. The theory of operation of these devices rests chiefly on that of chokes and transmission lines. A balun or unun is simply a choke that isolates the input from the output (thus only allowing transmission currents to flow) and a configuration of transmission lines.

A major difficulty (even today) is that this very important and popular class of matching devices is not included in the curriculums at universities. In fact, there are no standards for the specification and testing of these devices by any professional group! As a result, practically everyone still perceives these devices as conventional transformers and not transmission line transformers. To remedy this, it has been suggested that this class of transformers be called broadband transmission line matching networks.

For more detailed information, please read the following written by Dr. Jerry Sevick, and available from CWS ByteMark.

1. Transmission Line Transformers, 2nd. Ed. published by ARRL. Contains analysis, characterization, and designs of BALUNs and UNUNs. Good for students, engineers and designers.
2. Transmission Line Design Handbook . Contains 48 improved designs of BALUNs and UNUNs covering all impedance ratios. Good for do-it-yourself, hobbyists, and Amateurs.
3. Building and Using Baluns and Ununs: Practical Designs for the Experimenter. Published by CQ Communications, Inc. Jerry Sevick. The all new definitive source for his latest practical information and designs. Unique opportunity to learn about the application of baluns and ununs for dipoles, yagis, log periodics, beverages, antenna tuners, and countless other examples.

Reasons to buy BALUNs and UNUNs from CWS ByteMark

1. All units are designed and optimized for efficiency, bandwidth and cost.
2. All units are manufactured under stringent quality control procedures. Each unit is fully tested for performance before shipping.
3. Widest and most comprehensive selection of impedance ratios to meet all your requirements.
4. Custom designs to meet your specific needs.
5. All units are guaranteed for 1 year.
6. All units are available from stock for immediate shipment.
7. CWS ByteMark ships to all over the world.
8. No minimum quantity purchase.
9. VISA or MASTERCHARGE service available.
10. Complete money back guarantee. No questions asked.

Please click the BALUN and UNUN icons on your left for descriptions and prices.