HQ-180 Alignment Problem

[Dave Franklin]

All,

I am having a problem aligning my HQ-180. The IF alignment worked OK. On
the RF Alignment, bands 1 & 2 tuned up with no problem. On the rest of the
bands the low end adjustment tuned up OK but the high end setting will not
align to the high end of the dial.  The oscillator frequency will not go
high enough with the adjustment capacitors at the end of their range.  It
is about 500 kHz low.

The only thing common to the problem bands is the bandspread.  The
bandspread capacitor seems to be in good condition (plates OK, connections
good).

I have changed the tubes and checked the resistors.  The voltages on the
6C4  oscillator tube are:

        Should be       Measured

Plate   130 V           149 V
Cathode  0               0
Grid   -6.0              0

Any ideas or suggestions will be greatly appreciated.

Thanks,
Dave Franklin
Cornelius, NC