Iron Powder Cores

NEW PRODUCT ALERT

BULLET™ END FED ANTENNAS - 80-6 Meter - 100/500/1500 Watts

SHORTER, SAFER, MORE BANDS THAN EFHW

Bullet end fed antennas are shorter than conventional dipoles, yet deliver superior performance on many bands using the radiating coax as part of the antenna. They come in a variety of power levels, and work great for portable or permanent installations. Thousands in use world-wide! Selected models available at Ham Radio Outlet and all available on company website where full details on these antennas and many accessories are shown.

BULLET-2006 Antenna (Click for more info)

BULLET 2006 Configuration 08162023 png - Iron Powder Cores

BULLET-4006 Antenna (Click for more info)

PAL EFOCF4006 Confiburations 12032023 png - Iron Powder Cores

BULLET-8006 Antenna (click for more info)

BULLET 8006 Configuration 09272023 png - Iron Powder Cores

Palomar Engineers Antenna Info Sheet


Popular Categories


HF Wire Antennas - End Feds, Off Center Fed, Loop, T2FD/BBTD, Dipoles and Zepps, 160-6 Meters, Wire, Hardware and Instructions for you.


Ferrite Products - Rings, Snap On, Slip On, useful from 150KHz - 2 GHZ, Mixs 31, 43, 52, 61, 75

RFI Solutions - Consumer Electronics, Computer, Audio/Home Theater, Wall Warts, Solar and more!

Baluns/Ununs/Chokes (1:1-81:1 ratios) for RX, 100/500/1500/5000 Watts including Hybrids (with choke) and Multi-Ratio

Radio Transceiver/Linear Amplifier RFI Kits - All Brands, VLF, HF to UHF

Noise Filters - Coax, AC and DC power 100 KHz - 150 MHz, up to -48 dB noise suppression - hear DX again!



Palomar Engineers® products are over engineered to outperform the competition without being over priced!

Buy DIRECT, on eBay or at Ham Radio Outlet stores nationwide, HRO Product List HERE

QUICK and EASY RFI Solutions for Consumer Electronics - FREE RFI Tip Sheet

All Palomar manufactured items made in USA!

Featured Products

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2833412803 - Iron Powder Cores
Garage Door Opener RFI Kit
Garage Door Opener RFI Kit
SKU RFI-GDO
List price $49.95
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$39.95
IRON POWDER TOROID CORES-xx

Iron Cores 150x150 - Iron Powder CoresIron powder cores are more stable than ferrites and do not saturate as easily so they are best for tuned circuits, filters, and high power inductors. They come in different “Mixes” for use at different frequencies. For best “Q” use the Mix specified for your frequency.To find the number of turns to give the desired inductance for your coil use the formula below:

 

Turns = 100 x iron core formula 300x14 - Iron Powder Cores

Toroid Dimensions

tcolorcode - Iron Powder Corestcore - Iron Powder Cores

 

To order specify core size and mix (e.g. T200A-2). Available in sizes that have µH per 100 turns shown in table.

All iron powder cores are special orders.  Please allow one week for shipment after order received.

The iron powder cores shown in the above tables are primarily used for either high power feed line chokes for common mode current reduction or for 4:1  and 9;1 very high power transmission line transformers.

For high power feed line chokes, choose the inside diameter of the iron powder core closest to the transmission line outside diameter and use 6-20 cores at the junction with the antenna feed.

For 4:1 (50/200 or 75/300 ohm) transmission line transformers in the range of 1.8-30 Mhz, select the size appropriate for the power level as follows:

T200A x 2 = 1.5KW

T300A x 2 = 2.5KW

T400A x 2 = 5KW

Use Mix 2 for all the above transmission line transformers.  Fully assembled and enclosed units are available for each of the power levels.  Click HERE for information.

4:1 transmission line transformers using iron powder cores are typically used for ladder line to 50 ohm coax connections

For .1 – 2 Mhz wide band transformers use Mix 26 which has a higher permeability and requires less turns to achieve a given inductance. Mix 2 has almost constant permeability from 1-30 Mhz.  Mix 26 has an initial permeability of 75 at .1 Mhz and gradually decreases to about 10 at 30 Mhz.  For high power AM broadcast range (.5-1.7 Mhz) transformer, use Mix 26 to reduce the turn count.

Minimum order for iron powder cores is $50  

Shipping on larger cores in quantity may be more than $10 – email/call for quote.