[Icom] AH-4 malfunctioning...

[Cletus W Whitaker]

de WB2CPN South Central Pennsylvania   2002.06.10

You could disconnect the antenna terminal on the AH-4, and attach
a 50 Ohm dummy load instead.  Use 2 inch wire for the antenna terminal,
and about 10 inches to the coax ground inside the AH-4.  Then see if
it will tune all the bands.  Then, instead of the wires,  add a few 
feet of coax, six or so, between the AH-4 and the dummy load.  This
will place additional capacity on the output of the AH-4.  See if it
will tune all the bands.   Important:  whatever kind of wire you use
for an antenna, make sure it's OK.  You didn't mention a balun, so I
guess you're using a random long wire, if so, how do you get a ground
wire up on the roof?       73  Clete