T-4 Plus & T-4G Plus

T-4-500 "Low Profile Line Isolator™"

"The RFI Quick Fix™"

"The Ground Loop Solution™"


T-4G Plus is shown; the T-4 Plus does not have the ground strap.

How does the Line Line Isolator system work?

A graphical explanation





T-4-500

T-4 Plus & T-4G Plus

Type

Current

Current

Design Impedance

50 ohms in and out

50 ohms in and out

Operating Bandwidth

160 - 6 m

160 - 6 m

Power Loss, dB

Nil

Nil

Saturation Resistant

Yes

Yes

Internal Transmission Line Z

50 Ohms

50 Ohms

Core Type

Ferrite

Ferrite

Power Rating @ 3.5 MHz

500 PEP watts PEP if SWR < 2:1, SSB/CW duty cycles *

> 1500 watts if SWR < 3:1, SSB/CW duty cycles *

Phase Delay Unspecified

6.2 degrees @ 3.5 MHz

Load Variation Tolerance

Excellent

Excellent

Input connector

SO-239

SO-239

Output Connector

SO-239

SO-239

Size 1.75" x 4.75"

2.3" x 8"

* Not rated for AM, RTTY or other high duty-cycle modes.

The T-4 Plus and the T-4G Plus are identical to the former T-4 and T-4G respectively but now have increased bandwidth.

The T-4-500 has an isolation factor that is higher than the standard models. They are far smaller in size and weight, too. the power rating is 500 watts PEP SSB/CW service. This makes them perfect for interconnecting a transceiver and a linear amplifier. In low power installations, considerable space can be saved using the T-4-500.

Applications: Top-of-the-line, maximum isolation Line Isolators. Replaces 4KRF-LI, 4KV-LI and T-3 with specifications exceeding those it replaces. Use in all RFI applications and as a retrofit device following standard baluns used in antenna already fitted with a balun.


The Big Gun weapon in the fight against RFI

The RFI Quick Fix™

High isolation
Break up ground loop more effectively
Stop RFI
End RF feedback problems
Does not affect signal path or antenna matching


For really tough RFI and RF feedback problems, you can't beat the new T-4 Plus and T-4G Plus Line Isolators™. The T-4G Plus shunts stray RF directly to ground with its built-in ground strap. Stray RF hasn't got a chance, yet signal attenuation is zero!

Use the T-4 Plus when a direct ground path is not possible.

The T-4 Plus is perfect for use with Vertical Antenna system. Install at the antenna's feedpoint. If you can install a T-4G Plus you have the ultimate in Vertical antenna feedline isolation.

If you have one of the new rigs which covers HF + 6 meters, then the T-4 Plus or T-4G Plus are the ideal choices.

Install the T-4 Plus between transmitter and linear. If you have ground loop problems, there is no more effective way to break them up than with the incredible isolation of the T-4 Plus.

Install the T-4 Plus between the transmitter or linear amplifier and your tuner. Use single-point ground at the tuner (all equipment ground go to the tuner ground as does the ground wire to your ground system) in combination with the T-4 Plus and you're tuner works like it's supposed to and so does your linear.

Using a T-4 Plus following the balun supplied with your beam and produce a measurable improvement in F/B and F/S ratios. There is no better way to eliminate feedline radiation.

If you are using a coil of coax as a choke balun, the T-4 Plus or any of our Line Isolators™ will be far more effective.


RADIO WORKS'™ WEB STORE

Available at the RADIO WORKS'™ Web Store

T-4 Plus Line Isolator™ 160-6m, 1500 W $49.95
T-4G Plus grounded Line Isolator™ 160-6m, 1500 W $53.95
T-4-500 Line Isolator™ 160-6m, 500 W $42.95
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You'll need a jumper cable to connect Line Isolators™ between equipment.

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