document. This is a PDF document and is the same as the
PDF contained in the EME2012 DVD. All versions of the
VLNA are now included in one document. It replaces all
previous versions of the VLNA PDF. If you notice any
omissions, please let me know
. There are a
few known errors that I will update next time I access. For
now please note. VLNA9 L1 coil details have changed and are
shown correctly on page 24, in the section on VLNA9 coil
details! L1 should be 12mm long, not 9mm............And,
yes, I know there is no figure 17c....yet.
VLNA kits are £50 each.
This price does not include postage and
packaging. Please note that UK postal rates
increased in April 2012. Rates will depend on
where in the world the VLNA has to be shipped and,
of course, what quantity you need.
For orders over £100 I recommend
International Signed For service, where available.
All band kits
are the same price plus postage and
For payment, I can accept Paypal,
cheque (UK bank only), or Bank Transfer.
E-mail me for details. My e-mail address is in
the graphic near the foot of this page.
Link to pre-amplifier articles Includes
a 'must read' by Sergie, RW3BP
SPF5043Z amplifier. The SPF5043Z amplifier article
appeared in the July 2011 issue of Scatterpoint, the
newsletter of the UK Microwave Group. This is a
slightly updated version of that amplifier article.
It includes some new figures and details of
the kits that are available from me. For readers in
the USA, similar kits are available from WA5VJB.
In October 2012 I received
another batch of PCBs. This has allowed me to
rationalise the kit types available.
There are now only two PCB types available for
the SPFAMP. These both use ARLON 030 board
material. The two types are SMA
through-board connector and the slightly smaller
PCB with cable termination pads. The FR4 types
and the edge connector PCBs are discontinued.
kits (either PCB), together with an SPF5043 and
passive components are available from G4DDK at
£12 each. E-mail me for details of post and
packaging and payment details. My e-mail address is
shown in the graphic at the bottom of this page.
PGA AMP kits
As mentioned in DUBUS and Radcom here are the PGA Amp kits. Using HEMT MMIC technology the PGA103+ devices were designed
for use in cellular base station mast head
preamplifiers and feature low noise, broad bandwidth, high
dynamic range with excellent input and output
return loss. They are usuable from below 30MHz to
Typical performance is 0.5dB noise figure at 144MHz
and 0.55dB at 432MHz with input third order
intercept (IIP3) of +10 to +12dBm. Gain is
typically 25-26dB. Power requirement is +5V at
The initial kits offered using the PCB shown. It is
35 x 16 x 0.79mm FR4 material with plated
through holes. Kits for the SMA connector version of
the PCB and boards with provision for adding input
and output RF filter components will be added soon.
I already have limited numbers of these boards if
you are desperate for an alternative version of the
Each kit contains the device, PCB and passive
components. The filtered PCB versions will NOT
contain any filter components as these are likely to
vary according to intended use.
The kits cost just £12.00 each. Inquire for
payment and postage details at the e-mail address
shown at the bottom of the page.