Sam's Microwave Page


Loc: JO02PA

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

Anglian 144MHz high performance transverter module
The Anglian 144MHz transverter modules are now available ( quantities are limited for the moment).
This is a high performance 144/28MHz transverter module featuring a ready-assembled PCB so that the amount of SMD soldering is minimised. 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.
A comprehensive PDF of the transverter assembly is here. Updated to V1.1
Kits are available at 125 each plus shipping.
For those who prefer to build their own Anglian and save some money, a short kit consisting of the PCB, crystal, tuneable coils, MMICs and ( maybe) mixer will be available.
A separate hardware kit consisting of the tinplate box, SMA connectors and 1500pF Tusonix feedthrough capacitors will also be made available. Just add SMD parts!
Prices to be announced.

Anglian 144MHz 8W power amplifier
A 144MHz version of the 70MHz amplifier using the Mitsubishi RA08H1317M module is described in this article.
Short kits are available at 8.

Nacton 70MHz  high performance transverter module.
A few kits are still available in spite of my previous posting!
The Nacton 4m amateur band transverter module was awarded a 'Highly Recommended' at the 2013 RSGB  Centenary
Convention Construction Contest ( Designer category).
Among the judges were Joe Taylor, (K1JT) and Eben Upton ( Raspberry Pi Foundation).

Brief details of the Nacton are available 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

The NACTON 4m power amplifier
Is a 7W Mitsubishi module type RA07H0608M available from GH Engineering in the UK.
PCBs 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.

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

New. Now reduced to 50 once again as a result of bulk purchase of some components!
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.

E-mail me for Europe. My e-mail address is in the graphic near the foot of this page.
VLNA 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

Available again 
kits are again available at 12 each plus shipping

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!


Log periodic yagis for 400MHz to 1000MHz, 850 to 6500MHz, 900 - 2600MHz and 2 GHz to 11 GHz 
Vivaldis for 9 - 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
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:-

7W PA info added

Anglian PDF added

Nacton availability notice

VLNA kits from WA5VJB added

144MHz 8W amplifier added

Updated Anglian PDF added
Short kit version of the Anglian added
Amp availability info added

Email address

This page last given some TLC

Page first established November 1997