50 ohm coaxial load shown here is a water cooled device that I
picked up some time ago.
(the $/£ rate was
favourable at the time)
I am convinced that this
load will last me for ever, and I'll no longer need worry about
off air tests when running up a new or existing amplifier.
The RF input is the 3 &
1/8 coaxial connection at the top of the load. In this picture I
have an adapter that is fitted with the 7/16 socket that can
just be seen at the top.
The water inlet is the
bottom connection (covered by the blue plastic cap) The
water outlet is the connection facing outwards, or, towards you
just below the yellow warning sign)
It's simple enough; Water
flow has to be confirmed, then use the load as you would any
I've no need to get anywhere near
the rated RF capacity, and so I use normal tap water 'from the
drain' gives me a good enough flow rate.
Please note: Tap water
where I live is 'soft' and low in impurities compared to that
say or London, or Manchester.