Specifications

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Tune-up your linear amplifier perfectly without over-

heating, tube damage, power supply stress, arc over . . .

AMERITRON QSK-5 High Power Transmit/Receive Switch

The ATP-100

Amplifier

Saver

lets you

safely tune up

your linear amp-

lifier perfectly for full power

output and best linearity.

It protects your expen-

sive amplifier from overheating, tube dam-

age, power supply stress and arc-over dur-

ing tune-up. It prevents premature failure

and costly component replacements.

AMERITRON’s innovative pulse tun-

ing technology lets you tune your amplifier

at full peak output power for best linearity.

It keeps average power to a low safe level

to prevent overheating and power supply

stress.

“Why can’t I just tune up at low power

to reduce overheating and component

stress?” you ask yourself. Well you can . . .

but if you don’t re-tune at high power

(which causes overheating) you can create

severe splatter and abuse your tube grids

because of excessive grid current.

If your linear uses tubes that are easily

damaged by normal tune-up, the ATP-100

could extend tube life.

“Sniff-out” RFI or TVI caused by rusty

guy wires, rain gutters, clotheslines and

others by generating full peak power with-

out amplifier damage. Also use to evaluate

wattmeters and QSK systems.

Set and forget internal trimpots let you

tailor duty cycle and pulse rate precisely

for your rig and amplifier.

Plugs into your rig’s CW key jack.

Simply press Pulse Tune button and tune

your amplifier normally for maximum

power output.

Locking Pulse Tune and momentary

Carrier Tune buttons. Fully shielded all

metal case. 3

Wx1

Hx4D inches. Uses

9 Volt battery. Order ATP-100, $49.95.

ATP-102, $59.95.

Deluxe version has Duty

Cycle and Pulse Rate

Controls on front panel

for easy performance

testing of wattmeters, QSK systems and

other equipment.

ATP-100

Suggested

Retail

This

self-con-

tained

AMERITRON QSK-5 Transmit/Receive

Switch uses electronic PIN diode switching

to give you lightning fast QSK operation

from nearly any HF linear amplifier.

It lets you use your linear amplifier for

high power QSK CW, for packet, AMTOR

and any mode requiring extremely fast

switching between transmit and receive.

Installation is simple. All you do is

plug in a few cables to start enjoying QSK

-- there’s no complicated internal wiring.

The wworld’s most advanced QSK

switch has new technology that’ll make

your amplifier last longer and prevent

TVI, RFI and key clicks.

AMERITRON’s exclusive

AmpSaver

(available in QSK-5PC)

completely turns off your power amplifier

tube current between dots, dashes and

words! This new QSK technology gets rid

of unwanted power dissipation that causes

damaging heat. Your expensive amplifier

runs cooler so every component in your

amplifier lasts longer.

Our exclusive SureSwitch

handshaking

prevents “hot switching” RF power.

Prevents TVI, RFI, key clicks and possible

damage to your amp.

The QSK-5 is six times faster than a

typical mechanical vacuum relay “QSK”

switch that can just barely keep up with

QSK transceivers. As transceivers get

faster and better, mechanical switching just

won’t be able to switch fast enough.

Unlike noisy mechanical vacuum relays,

the QSK-5 is extremely quiet -- there’s no

relay chatter keeping you from enjoying QSK.

Yo u won’t have to pay for QSK again if

you buy another amplifier. Unplug the

QSK-5 and use it with your new amp.

Handles 2500 Watts PEP and 2000

Watts CW in normal amateur service when

SWR is below 1.5:1. Handles 750 Watts

on continuous carrier modes such as RTTY,

SSTV, and FM. Optional cooling fan (CF-

5, $39.95) allows sustained operation at

1500 Watts in any mode. Use with positive

voltage keying up to +25 Volts. 6Dx4Hx91/2W”.

Internal QSK Available for the follow-

ing AMERITRON models: AL-80B, AL-

1500, AL-1200, AL-82, AL-800, and AL-

800H. Contact Ameritron for installation

details on the QSK-5PC internal switch.

QSK-5

349

Suggested Retail

The ARB-704

will work with

almost any transceiv-

er without the need

of the plug-and-play

pre-wired cable.

The ARB-704

advanced interface is

compatible with all common radios and

amplifiers even though radios and ampli-

fiers do not have standardized voltages,

accessory plugs, or wiring. It’s designed to

work with any amplifier/radio combination.

The input is designed to be compatible

with any transmitter or transceiver, and the

output is compatible with AC control lines

or DC positive or negative amplifier con-

trol lines having up to 200 Volts peak open

circuit voltage and 300 mA of operating

current.

Why you need the ARB-704

Amplifiers can damage radios if the

amplifier has too much relay control

voltage, voltage spikes, or excessive

current on the relay control line. Such

damage often appears as “stuck” or

“sticky” transmit relays in exciters or

shorted transistors on transmit control

lines. In most cases where the radio is

damaged, the system transmits normal-

ly but the external amplifier stays

locked in a “transmit” mode. This prevents

receive signals from coming through the

amplifier with normal levels whenever the

amplifier is in the “ON” or “OPERATE”

position.

The ARB-704 has many electrical

advantages over conventional relay buffer

systems. The ARB-704 has no moving

parts, switches almost instantaneously. It is

noiseless, has very long life, and will not

develop dirty contacts. It operates with

negative, AC, or positive amplifier relay

control lines.

It works with any relay voltage (AC,

positive, or negative) up to 200 peak volts

and any relay current up to 300 mA. The

ARB-704 is fully compatible with conven-

tional amplifier relay systems. It is espe-

cially suited for buffering vacuum relay

QSK amplifiers, since the ARB-704 does

not affect attack or release times in a dele-

terious manner.

The ARB-704 operates with transmitters

or transceivers that pull amplifier control

lines to ground, or output a wide range of

positive or negative control voltages. The

transmitter only switches currents under

0.35 milliamperes and very low voltages

when using the ARB-704. Measures a

super compact 4

Wx1

Hx2

D inches.

PLUG-AND-PLAY CABLES

Cables are $15.95 each.

The ARB-704 is supplied with the fol-

lowing:

1. One power connector cord and plug

with red wire (+12 Volts) and black wire (-

and ground).

2. Three phono (RCA) cord with con-

nectors on each end. These cables are for

relay, ALC and amplifier control lines.

ARB-704

INTERFACE BUFFER

ARB-704I2

for IC-706 series radios

AMERITRON Amplifier-to-Transceiver Interface

Protects expensive radio from damage by keying line transients and steady state current and voltages

Model# Transceivers

PNP-8D FT-1000, (MP), 900, 767GX, 920, 990, 747GX

PNP-8M FT-890, 840, 817, 857, 897

PNP-35 FT-100, (D)

PNP-5M FT-847

PNP-7D TS-440, 690, 450, 180, 140, 950, 130, 870, 2000,

50, 120, 530, 430, 830, 949, 570

PNP-13D All models of the IC-706 series

PNP-7DK TS-930

PNP-7DK2 TS-520

PNP-8MK TS-480

PNP-5D FT-980

PNP-8DI ICOM ACC JACK

A plug-and-play cable is not

needed if your radio is not listed.