as many posters have pointed.
2 problems - the goo & dry joints.
the goo can be removed carefully with tweezers etc, the dry joint can easily
be found by using freezer spray or lighter gas.
the joint will show the ring quite nicely & it makes it easier to see with a
bright light (goes dull)

not only the 440, some 430's & the 930's suffer the same.

i have known the VCO varicap diode to be trouble some aswell.

mike

"Tom Tillander" wrote in message
...
My Kenwood TS440S is beginning to present symptoms (frequency drift and
intermittent dots in the display) of PLL unlock. Service Bulletins at
Kenwood.net suggest that replacing a fist full of diodes with new diodes
of
any of these types : 1S2588,1SS91S, BA282 will cure the problem.
Additionally, I have heard that 1S1587 diodes can be used. However, I
have
been unable to find a source for these parts that will send or sell me
just
a fist full. I haven't tracked down the manufactures of all the parts.
However, the BA282 seem to be made by Vishay.

Can any of you recommend a supplier for any of these parts? Thanks