There are three, and possibly, four steps involved in expanding the frequency range of the Alinco DJ-S41T. Earlier models required just the removal of the back of the case including the battery holder. Then a '0' ohm resistor had to be removed, and the case reassembled.

This removal is most easily done with a very thin-tipped soldering iron, and a probe to get the part out of the way, Solder wick should then be used to remove any leftover solder on the pads.

On some of the later and most recent models, the 'VCO coil' must also be adjusted. This is done by taking a very small screwdriver (like a Greenie) and ever so slightly, spreading apart the turns on the VCO coil. This coil is located into a shiny metal can on the PC board, and the coil may be adjusted through the hole in the top. The 'goo' on the top of the coil is pliable, so the adjustment is not that difficult.

When the project is complete, there should be just smooth surfaces on the old pads where the '0' ohm resistor was. The case is reassembled, the batteries reinstalled, and the radio tested.

A couple of points: This radio has virtually NO front end Image rejection. When you expand the operating range, you are likely to hear all sorts of signals on wierd frequencies. Don't panic, it just means the input is on the wrong side of the Local Oscillator.


Also - please remember that it is illegal to transmit out of the band for which the radio is type accepted !!

The finished product, ready to RECEIVE on the RPU Band...


Yes, the Alinco DJ-S41T will transmit on this frequency.
But it's not type-accepted; it hasn't passed the spectral purity. stability, or deviation tests required for the RPU bands. For this reason, please don't abuse the rules by operating it in a mode for which it was not designed or intended.


Copyright 2005 by Vital Sounds - ALL RIGHTS RESERVED