G4BAO.COM

Microwave Amateur Radio Station, Waterbeach. 8km North Of Cambridge JO02cg

To Contact me:

Skype johng4bao

ON4KST Microwave Chat

E-mail john at g4bao dot com

QTHR

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Downloads

 Click on the link to download.

3 Watt 70cm Amplifier

(500mW DATV Amplifier)

PCB kits are available for this amplifier. see For sale page

A copy of the article and build instructions can be downloaded below.

Article

Build instructions

PD85004 version 

Latest AFT05MS004N version  

2.5Watt 23cm Amplifier

(300mW DATV Amplifier)

PCB kits are no longer available for this amplifier. 

A copy of the article and build instructions can be downloaded below.

Article (Zip file)

Build Instructions

 

 

 

 

 

G4BAO LDMOS PA Archive    

Wideband Amplifier Archive       

Relay Driver

PCB pdf     

 

Presentations

GHz Bands EME from a “challenging”
location

The Bodger's Guide to QO-100 / Es'hailSat

Moving up to 23cms

A Deeper understanding of Meteor Scatter

VHF Propagation

The Bodger's Guide to Patio Moonbounce

Optimising a REALLY small microwave EME system

Modifying 1900MHz SSPas for 13cm

My EME2012 presentation

The Bodger's Guide to Amateur Microwaves

Talk given to the Cambridge University Wireless Soiciety 2/2/2012

Orebro EME convention 2011 - LDMOS PAs

A re-working of some earlier talks on LDMOS PAs for the Swedish EME convention

The Bodger's Guide to Solid State QRO at VHF

A pdf of my RSGB Convention 2010 presentation   

The Bodger's Guide to Scattering parameters

A PDF of my presentation at RAL on the 18th of April 2010

The Bodger's Guide to LDMOS Power Amplifiers

A PDF of my presentation at RAL on the 26th of April 2009

Bodger's Guides (or application notes if you prefer)

#1 LDMOS Power Amplifiers

#2 Using ceramic flange devices in the G4BAO PA PCB

#3 Using Surplus AFL 900MHz hybrids at 23cms

#4 Recycling the Mini circuits ZAPD1 as a DC- >4GHz splitter

#5 A 40 Watt power amplifier for 2320MHz using the MRF19085 in a G4BAO 1296MHz board

Ionica "Pizza box" PIC code 

Some code to play with for programming the synthesisers in Ionical equipment

Backscatter errata

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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