ATLAS 210 transceiver is a nice gear still quite compact even to
according standards .However to use it in portable you need some
adding devices such as reflectometer and this add both weight and
volume in your bag . It is quite easy not to bring such a device if you
make the following modification .It will not cost a fortune to make it
as you only need a switch and an adjustable resistor
||By chance ATLAS 210 as a built in SWR measurement system which is use to prevent overdriving the power amplifier in case of mismatch of the antenna .The modification consist of taking the voltage generated and to apply to the front end Ammeter .|
|The schematic is outlined herewith .The first thing to do is to locate the signal feeding the SWR REFLECT INPUT of PC500 Board .Generally is is a green wire .A wire is soldered which goes in serie with an adjstable resistor (10 k ohm) to the double circuit switch as shown .In normal position you continue to read on the front ammeter either the Power Amplifier current or signal strength .In opposite postion when you are transmitting you read a current proportionnal to the reflected power|
|The double circuit switch can be put in place of the noise blanker hole if the noise blanker is not installed in your rig . If it is not the case you will have to drill a hole in the front panel . The value f the resistor in serie has to be adjusted to have a decent reading on the ammmeter.If you have made the expansion box modification it is a good idea to make the resistor adjustable from the front panel||Tuning
the antenna becomes easy and does not require a SWR meter .
You adjust your manual tuner so as to have a minimum
reading on the ammeter .