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 Amateur Radio RF Measurements:


  PM4 is an Infinity Group Project:

Fox Delta Project "INFINITY"

Click above image to know more about INFINITY Project Concept


 Dual Channel 500MHZ RF Meter: PM4


A Project by:

Tony / I2TZK

Frank / K7SFN 

Dinesh / VU2FD


Dual Channel 500MHz RF Meter: Graphic CPU

Graphic CPU used in PM4 is a a core of our "INFINITY" Project and is developed keeping in mind that we use same CPU/LCD/Hardware for various Purposes or Projects, saving a lot of money in hardware. 

This is important for homebrewers because  RF measurement some times, is only a one time a  month (or a year!) requirement in a Radio Room!!

PM4 is designed to work as a standalone unit. A PC program may be available in future from Tony/I2TZK.

PM4 is a dual channel 500MHZ RF Meter, designed in two parts, interconnected by a D9 Male to Male Cable (usually supplied with Graphic LCD/CPU KIT):

1. Graphic CPU and

2. Sensor unit with 2 X AD8307 Log amplifiers

PM4 Graphic CPU-0613:

Graphic CPU: 128X64

Click above picture for larger view

PM4 Sensor Board with 2 X AD8307s:

500MHZ RF Sensor with 2xAD8307

Click above picture for larger view


PM4 RF Meter Hardware Details:

"Fox Delta INFINITY" Graphic CPU with PIC18F4550
Graphic CPU hardware details:
128 x 64 Graphic LCD with Back light control  
DC12V or USB Powered 
Expansion slot for relays and alarms (FRC16)
8 DIP Switches for CPU Configuration


RF Measurement Sensor has Two AD8307s and BNC Connectors


Powder Coated Free Cases for CPU and Sensor.



 PM4:  Tech Information Documents


PM4 Tech info document PM4: 500MHZ RF POWER Meter with Graphic LCD
PM4 Graphic CPU Firmware Document by Tony/I2TZK PM4 Firmware by Tony/I2TZK
Graphic CPU-0613 Schematic JPG
Graphic CPU-0613 Tech Info Doc 0-500MHZ RF Sensor Document
Graphic CPU-0613 Kit Parts List 0-500MHZ RF Sensor Document


PM4 Sensor Board kit Parts List 0-500MHZ RF Sensor Document
PM4 Sensor Board Schematic JPG
PM4 Calibration Procedure by K7SFN

0-500MHZ RF Sensor Document

 Useful Information Documents and Links
Mini-Circuit DBm to Volt Table

DBm to Voltage Conversion Chart

 PM4 PIC Firmware User Document
PM4 User Document by I2TZK 

0-500MHZ RF Sensor Document


PM4 PIC18F4550 Firmware for Graphic CPU V1.02

Visit I2TZK Web Site


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Buy From 2CO     

PM4: GCPU-0613 and Sensor Combo Complete Kits  Being revised
GCPU-0613 complete kit with Free Case

PM4 Sensor board complete kit with 2XAD8307 and a free Case.




Graphic CPU and Sensor board are also available separately for experimenters

IN Stock
PM4 Sensor Board Kit with free case 20.00

2CheckOut.com Inc. (Ohio, USA) is an authorized retailer for goods and services provided by Fox Delta.
Sensor board kit parts list
Includes 2XAD8307 on DIP Carrier

FD-GCPU-0613 Complete Kit with Free case 55.00 Being Revised
Kit Parts List


 Buy Assembled and PCBs
PCBs and Assembled Fox Delta Kits are now available form our School Project Website: Fox Delta School Projects



2CheckOut.com Inc. (Ohio, USA) is an authorized retailer for goods and services provided by Fox Delta.


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