Four States QRP Group

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4S Power Meter

Kitted and Offered For Sale By
The Four State QRP Group

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The Four-State QRP Group announces the addition of a new kit to the Four State product line, a high quality, dual meter power and SWR monitor.

This kit was conceived to fill a need within the hobby for an inexpensive, highly accurate SWR and RF power meter for QRP power levels.

The 4S Power Meter uses simple analog signal-processing circuitry to provide a set of essential measurements on two, direct reading analog meters, permitting quick and easy monitoring of your transmitter and antenna system.

High quality, double sided, printed circuit board construction is used, with solder mask and silk screened component reference designators. All components are through-hole for easy assembly.

The 4S Power Meter is recommended for builders of moderate to expert skill level. Construction time is approximately 4 hours, depending on experience level.

Specifications and Design Features

Frequency Range - 160 Meters thru 10 Meters
Meter Range - 100 mW to 10 Watts, up 10:1 SWR
Expanded scale settings for accurate low power and low SWR readings
NO calibration control required for VSWR measurements
1 dB insertion loss when operating - minimal loss when switched out.
Large, easy to read dual analog meters.
LED Status indicator alerts when VSWR is < 1.5:1 and > 2:1
Durable enclosure is made of pre-drilled silk screened PC boards.
Power from internal 9v battery, or external 9 - 14v supply into a 2.1 x 5.5mm coaxial power jack.
Dimensions: 2.5" x 5.5" x 3.5"
BNC connectors

Documentation

Assembly Manual

Schematic

Board Layout Part location (pdf)

Part List BOM (xlsx)
Part List BOM (pdf)

Posted with permission
Electronics 2000's Capacitor Identification Page
Electronics 2000's Resistor Code Graphic Calculator

Ordering Information:

• The cost of this kit is $ 125.00
with a shipping cost of $ 10.00

• DX Buyers, check HamRadioLand for availability.

• Note to Canadian Purchasers:
Due to high bank processing fees,
we can no longer accept Canadian Money Orders.

• If paying by check or money order (U.S. $ only),
please make it out to "Four State QRP Group" for the
indicated cost of each kit purchased.
Do not forget to specify the Operating Band for the radio.
Then mail your order to:

Four State QRP Group
Johnny Matlock ACØBQ
379 23rd Road
Lebo, Ks 66856

The 4S Power Meter is carefully kitted and shipped by Gary Coleman, AE4ES
Please direct shipping, kit, and part related questions to Gary Coleman

All proceeds are applied toward funding OzarkCon.
Thank you for supporting The Four State QRP Group.

The files and images on this site unless otherwise noted are copyright by
the Four State QRP Group and may not be published or used without permission.