Parts needed for a HR-1680

[Brickey, Peter]

Hi,

  I rrecently picked up a non-working HR-1680 receiver and discovered
that the problem was that the power supply regulator was bad.  This is
composed of a transistor (heath part #417-852, TIP31) which has a NTE
replacement and a regulator chip (Heath part #442-626, UA78MGT4C)
which I could not find a replacement for.  I have re-worked the power supply
to use a Radio Shack voltage regulator and it is now putting out the
required 13.5 volts, but I would like to try and put it back into its
original
state - anyone have a suggestion about where I might locate a regulator
chip (Heath part #442-626, UA78MGT4C)?

  The other problem is that the 15M crystal seems to be dead, I checked
all of the components around it and they are ok, so the only thing that is
left is the crystal (Heath #404-210, 29.895mHz).  All of the other bands
work just fine.

 Does anyone out there have a junker that has any of the above parts?

  73's,
           Peter

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