Sam's Microwave Page

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G4DDK  / W5DDK
Loc: JO02PA

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




Anglian 144MHz high performance transverter module
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 V1.1
Kits are available at 125 each plus shipping.

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.

EME2014 Presentation added as PDF

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


They're back!

Have run out of PGA Amp kits because of lack of PCBs I have updated the kit to use the alternative PCB. The original  PGA Amp article is still here. 
The new version is called the PGA Amp v2 or PGAV2 for short.
The PGAV2 Amp features the facility for an output LPF or BPF as well as facilities to power the amplifier over the output coax feed.
The amplifier features the same low noise figure and high dynamic range as the version 1 (original) but on a marginally longer PCB. By changing some of the component the optimum performance can be moved up in frequency from VHF to UHF. Components for the filters are available separately. Currently these are 75 and 150MHz LPF and 70 and 144MHz BPF.
The basic PGAV2 kit is 13 + shipping. The filter kits are 1.50 or 2.0 for the LPF and BPF respectively.


PGA144 Build article - provisional info


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!




                                                                   ANTENNA

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.




Contents
The UK Microwave Group
RSGB
Tech stuff
WA5VJB Antennas

About G4DDK
Links  
G4DDK Blog Spot




Change history:-




29/10/2014
EME2014 Anglian talk added

Update on availability of Anglian transverters

19/11/2014
PGAV2 added

28/11/14
PGA Amp article restored!

19/12/14
PGA144Build article added




Email address
email


This page last given some TLC
19/12/2014

Page first established November 1997