[NLRS] Icom IC-251A Low Power Mod?

[John Oehlenschlager]

I have a 251 with the split T/R.  The receive connection at the junction of
C202 and R194 was rerouted to J11 and the connection to the three diodes was
routed to J12.  I don't use a split IF so I just have a jumper between J11
and J12.

As for power, I use a 30 dB attenuator since my 903 transverter can use up
to a watt.  You might try pulling the driver final plug and see what output
you get.

If you were to go to the attenuator route, get a 3 dB and a 30 dB  5 watt
attenuator from MiniCircuits.  These units are rated for 5 w continuous.
Use the 3 dB unit directly out of the transmitter, then the 30 dB unit from
the 3dB to the transverter.  In this configuration the 5 watt rating is not
exceeded for either unit, especially considering SSB average power.  This
attenuator configuration is very common in radar testing and other high
power systems.

John O.   K0JO