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Yet another ham homebrew site.

 

 

144/432Mhz 1Kw/500W Linear build

4x9 mechanical polarisation rotating array

I like building things, it is the challenges that hopefully improve my technical skills.

 

The biggest challenge being to overcome my desire to bodge things

Update October 2018

 

Built the 70cm antenna system - but so few stations I decided to move straight to 23cm.

 

I was 3/4 way through building a 2.3m dish, ( a 1.8m solid dish off ebay and extensions to 2.3m) went on holiday, fell and now I'm not going to be able to continue for a couple of months till I'm fit enough to continue working on it.

 

Since I can't get on the roof to refit the 70cm or 2m system and I took down the Offset dipole for HF, I'm off the air till probably December!

Status May 2018

 

Due to the large size of the 2m array and being in a conservaion area - I've taken down the 2m system and now moving to 70cm instead.

 

The PA parts have arrived to fit the 500W 70cm into the linear box and the H frame is completed as are is the mastheda preamp/switching box and the 4x18 element antennas are very nearly complete.

 

The good news is that the noise from the shack and nearby houses is much reduced and so I'm looking forward to completing the build and getting back on air.

 

70cm System

 

Flex 1500

10MHz GPSDO feeding flex and zlpll LO @408MHz

Elecraft XV432 using external LO from reference

W6PQL based homebrew linear limited to 400W at antenna

VHFDesignLNA: LNA-70cm-EME ( ATF-531P8 <0.4dB NF)

4x Homemade Powabeam WS781562 Antenna

 

 

 

 

An introduction

I'm Richard, a Software engineer who was trained as an Electronics engineer. As well as my main job I also design and build things for people. Odd things, things you can't buy, things that you wouldn't know where to get made. If someone can convince me it will do some good for someone and it sounds interesting and challenging I'll have a go at - as long as it covers the costs I'm up for it!

 

Nothing jumped out at me recently so I decided to try moonbounce - that meant passing the three stages of the radio license which I did in a year, and then start building stuff.

 

Having built my first 600W linear, I decided that it needed to be rebuilt, bigger and better with the lessons I learnt from the first one

 

 

I got a lot of ideas off peoples websites - so this is my payback. I'm publishing what I have learnt and any useful information I found that may help the next person along.

 

 

This site is permanently under construction!

My current projects are the linear which I'm still mucking about and altering and my latest antenna project which is a polarisation rotator for my 4x9 yagi Array.