Sam's Microwave Page


Loc: JO02PA

Web page established November 1997
Don't forget my amateur radio and travel blog, also established many years ago!

From the 1st February 2016 distribution the DG8 2m masthead preamp kits will transfer to G4HUP (G4HUP.COM). Dave will be offering the short kit and as a new feature he will be introducing a fully assembled and tested PCB. You will still need to do some mechanical work and make decisions about connecting cables, but no more scrabbling about looking for SMD parts or that short length of PTFE cable! This should address the problem raised by a few builders regarding obtaining SMD parts
. Until February 1st I will continue to stock and sell the short kits at 19 each.
There will be more information on the changes on G4HUP's web page very soon.
My contact details are in the graphic at the foot of this page.

60W PA kits
Many of you will already know that the Anglian 2m and 4m transverters are capable of directly driving the 30 and 60W versions of the Mitsubishi module to their rated output. Unfortunately, the existing 8W PA PCB has the wrong pin spacing for the larger H2S and H2M size modules. GM3SEK has designed a new PCB that accepts the larger Mitsubishi modules and in addition includes provision for the optional input attenuator, PTT, variable bias and a higher power-rated low pass filter at the output. Ian has kindly allowed me to include the new PA as part of the Anglian line-up.
PCBs are already available and after some further testing short kits for the higher power PA will be made available. These will include all the SMD parts and MIGHT even include the PA module for a complete kit ( except heatsink). Contact me for PA details. See graphic at the footer of this page for my e-mail address.

Anglian 144MHz high performance transverter module

Anglian 2m transverter

This is a high performance 144/28MHz transverter module featuring a ready-assembled PCB. There is now no SMD soldering required.
The kit comprises a tin plate box, connectors ( SMA) feed-through capacitors, tuneable coils, crystal ( 116MHz by Krystaly) and a few other parts needed to complete the build.
The PCB has been updated to the 'Gold' version. A number of small errors have been corrected. These are explained in the accompanying paperwork. Why 'Gold'? The new PCBs have gold plated pads!
A comprehensive PDF of the transverter assembly is here. Updated to V1.2 This covers a mod to improve transmit receive switching speed.
Kits are available at 125 each plus shipping.

Anglian 144MHz 8W power amplifier short kit
A 144MHz version of the 70MHz amplifier using the Mitsubishi RA08H1317M module is described in this article.
PCB short kits are available at 8 each. The Mitsubishi module is not included. Mitsubishi power modules are available from GH Engineering in the UK and from AngliaLive in Wisbech.

EME2014 Presentation added as PDF

4m 7W PA similar to the 2M 8W PA
Anglian 70MHz high performance transverter module
A limited number of fully assembled 4m transverter boards are now available. Unlike the Anglian 2m kits, the Anglian 4m kit is supplied as a built and working PCB. You will still need to box the Anglian and make input, output and control/power connections to the PCB.
Originally these were bare board 2m kits, I need to add the 4m parts, test and then align the board, so from order to posting will take approximately 1 week to 10 days.
The built board is 110
Tinplate box, 6 feedthrough capacitors, 5 SMA connectors and a power diode costs 20

The Anglian 7W 4m power amplifier short kit
A 7W Mitsubishi module type RA07H0608M available from GH Engineering in the UK as well as AngliaLive in Wisbech
PCB kits for this module are available from the author. Suitable wire for the LPF as well as the passive components ( not the Mitsubishi module) can also be obtained from the author. E-mail to the address in the graphic at the bottom of the page for price and availability.
A full document detailing construction of the PA module is here.

Short kits are available at 8 each. Contact me for details.


Nacton 70MHz  high performance transverter module.
No longer available!

Brief details of the Nacton are archived here and more detailed information as well as construction and alignment details for the transverter here.

Several modifications have been made to the original Nacton following further work on the 2m version. These modifications are here
and now include the ones from the previous modifications document. Now version 0.2


PGA144MHz preamplifier
If you want a low cost, high performance preamplifier to go with your Anglian then the PGA144 might be just want you are looking for.
A 144MHz high dynamic range, low noise preamp based on the earlier PGA Amps, but now incorporating an input high pass filter, band pass output filter, adjustable gain, on-board voltage regulator and provision for power feed over the the output coax. The preamp kit is supplied with tinplate box, long reach SMA female connectors and power feedthrough capacitor.
Short spec:
Noise figure 0.6dB
gain 2 to 20dB
Input two tone, third order intercept (IIP3) greater than +6dBm
Input return loss better than 9dB

The kit costs 35 plus shipping. I can accept Paypal. .
Contact me for details at the e-mail address at the bottom of this page

Low Noise preamplifier (LNA) kits. Fully documented assembly instructions.
for 70cm, 23cm, 21cm* ( Hydrogen line - radio astronomy), 13cm, 12cm, 9cm.

VLNA kits are available for all these bands. The price for a full kit is just 50. This includes the tinplate box, connectors and all components.
Complete and working VLNAs ( including for 21cm Hydrogen line) are available from The DX Shop
For orders over 100 I recommend International Signed For service, where available.
I can accept Paypal, cheque (UK bank only), or Bank Transfer.
A number of the kits are available fromWA5VJB
in the USA. Contact Kent at  Kent's web page for details of price and delivery.
  My e-mail address is in the graphic near the foot of this page.
VLNA Information and assembly document. This has been updated to include a few small changes for the 70cm version.
Link to pre-amplifier articles Includes a 'must read' by Sergie, RW3BP


The  PGA Amp article is still here. 
PGAV2 kits are currently unavailable. Details of the  PGAV2 Amp  are here for those who still need them. More PCBs expected soon.
The  PGA kit is 13 + shipping.

Micro X PCBs
Recently added. Micro X PCBs from WA5VJB. These boards accept MMICs and discrete devices in the popular Micro X package style e.g. ERA, MSA/MAR.
The boards are available in 'panels' of two at 5 pair. The material is 0.79mm FR4. Termination is cable, although a few SMA through hole boards are also available.

PCB Antennas
Kent Britain, WA5VJB's, wide range of PCB antennas have become virtual industry standards, widely copied at higher prices in Europe! These are the original and best PCB antennas, developed over a long period of time and used as OEM antennas by many commercial, monitoring and test houses in the USA and elsewhere.
I carry a wide range of these antennas, so if you see something in the list below that you want or on  Kent's web page  ask me first!

Kent will also shortly be offering Multicopter/quadcopter/drone antennas. I expect to have these available in the UK when they are released.


Log periodic yagis for 400MHz to 1000MHz, 850 to 6500MHz and 2 GHz to 11 GHz 
Vivaldis for 5 - 25 GHz, Big Wheels for 1296 and 2400MHz,
1.3GHz 3 element and 2.4GHz 5 element yagi antennas and 4 element patch antennas for 5.8GHz and more. Check Kent's web page for list.
Further details and prices by contacting the address in the graphic at the bottom of the page.

The UK Microwave Group
Tech stuff
WA5VJB Antennas

About G4DDK
G4DDK Blog Spot

Change history:-

Product changes announced
Email address

This page last given some TLC

Page first established November 1997