of a Pneumatic Pump Up Mast
like the Clark SCAM
The Clark SCAM
makes an ideal mast which can support a large array of antennas.
SCAM's come in two main sizes...
12m / 40 ft called the SCAM 12 or SCAM 40
21m / 70ft called the SCAM 21.
All Scam's are
based on the same unique and very high specification design... the tubes on the
larger masts simply being longer
than those of the shorter masts !
Clark masts are
manufactured on the Isle of Wight....their web site is
(they cost several 1000's of Pounds NEW )
been used by the UK Military for many years as as such are designed to be VERY
They are frequently available on the Government Surplus Market or from Classified ads in the Radio Mags or even eBay.
As guide a fully working SCAM12 / 40 costs around £350.
SCAM's can be used in Mobile or Portable configuration if required... many Radio Contest groups use SCAM Masts mounted
on a towable trailer with a 12v compressor to extend.
This Page is aimed
at showing how to construct a simple remote control system which will allow you
and retract your mast from your radio operating position.
The diagram below
can be downloaded if you wish to save it to your Hard Drive for later use.
Right Mouse Click and select SAVE PICTURE
or Download as a PDF File HERE
If you have
a problem locating Solenoid valves try using Washing machine water
bottom section of your mast
resource on the web for SCAM users and those who wish to modify
and use a "Part Scam" can be found
on the web site of Paul Sladen.
Lots of very useful information and links to suppliers.
PAGES ON THIS WEBSITE