Categories

Categories

Additional Information

Additional Information

Account Navigation

Account Navigation

Currency - All prices are in AUD

Currency - All prices are in AUD
 Loading... Please wait...

Categories

Categories

MFJ-974B 3.5 TO 54MHz Balanced Balance Line 300W Antenna Tuner

$199.99

MFJ

MFJ-974B 3.5 TO 54MHz Balanced Balance Line 300W Antenna Tuner

$199.99
Condition:
Used
Shipping:
$25.00 (Fixed shipping cost)
For International Shipping, Please contact me for a Quote before check out
Quantity:
Share

Product Description

This MFJ-974B 3.5 TO 54MHz Balanced Balance Line 300W Antenna Tuner, is in Excellent Condition. It was only used a few hours and is very clean with only one small scratch on the top which is hard to see. NOTE: This consignment item is being sold for a fellow Amateur, and is being sold as is as described. MFJ-974B 3.5 TO 54MHz 300W MANUAL TUNER ?3.5MHz to 54MHz ?Handles 300W PEP, 150W CW ?Fully balanced 'T' match network ?1:1 current balun ?Cross needle SWR/Wattmeter 30/300W ranges ?Matches 600 Ohm open wire, 450, 300 Ohm ladder lines, 300/72 Ohm twin, coax & random wires High-Q air wound tapped inductor ?4 gear 1000V air variable capacitors ?3 tuning controls ?12V DC illuminated meter ?Size 190 x 152 x 203mm approx. The MFJ-974B is a fully balanced true balanced line antenna tuner. It gives you superb current balance throughout its very wide matching and frequency range. For decades, the Johnson Matchbox has been the standard of comparison for balanced line tuners. But, it had a severely limited matching range and covered only 80, 40, 20, 15 and 10 Meters. The MFJ-974B is its successor. It meets todays needs and even surpasses the Johnson Matchbox outstanding performance. The MFJ-974B gives you excellent current balance, very wide matching range(12-2000 Ohms) and covers 3.5 MHz through 54 MHz continuously including all WARC bands, 6 Meters and the new 60 Meter band. Handles 300 Watts SSB PEP and 150 Watts CW. Tuning is fast and easy - - just three tuning controls. You can even adjust for highly efficient broadband low-Q operation or use higher Q when you encounter extreme loads.A large three-inch lighted Cross-Needle SWR/Wattmeter lets you read SWR, peak or average forward and reflected power all at a glance on 300 or 30 Watt ranges. A ground post is provided to ground one output terminal so you can also tune random wires and coax fed antennas.The MFJ-974B tunes any balanced lines including 600 Ohm open wire line, 450/300 Ohm ladder lines, 300/72 Ohm twin lead - - shielded or unshielded. Superb current balance minimizes feedline radiation that can cause troublesome TVI and RFI, painful RF bites, mysterious RF feedback problems and radiation pattern distortion.The MFJ-974B is a fully balanced wide range T-Network using four gear driven 1000-Volt air variable capacitors and high-Q air wound tapped inductor for 80-10 Meters and separate inductor for 6 Meters. The tuning components are mounted symmetrically to insure electrical balance. A 1:1 current balun is placed on the low impedance 50 input side to convert the balanced T-Network to unbalanced operation. The balun is made of 50 ferrite beads on RG-303 Teflon coax to give exceptional and efficient isolation. It stays cool even at maximum power. I am very proficient in packing and shipping this type of heavy radio gear. I have been packing and shipping this type of gear for nearly 20 years.The unit will be double boxed and packed properly so it should arrive in good shape but will be shipped at the risk of the buyer, for any damage not covered by insurance. I provide the heavy shipping cartons and packing material to assure the safest shipment possible. Please consider that the shipping price includes professional packing that you will not get at even the most expensive packaging facilities.

Product Reviews

Find Similar Products by Category