Janaury 13, 1975
HO-10						Bulletin No::
Monitor Scope					HO-10-1

                                                     	  "Hot"
Chassis"

Some transformers [PN 54-130] have been found to break down after about
five hours of use.  The the primary shorts to the high voltage secondary,
raising the chassis approximately 1000V above the line voltage.

If a new power transformer has been installed, be sure to let the unit
operate for a while before returning it to the customer.

The vendor has been notified, and corrections will be made in replacement
stock
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			October 21, 1980
HO-10							Bulletin No:
Monitor Scope						HO-10-2

		     Replacing the Power Transformer

+ + + + Information not yet available + + + +
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			December 9, 1981
HO-10							Bulletin No:
Monitor Scope 						HO-10-3

		     Replacing the Power Transformer

(Supercedes SB HO-10-2}

+ + + + Information not yet available + + + +
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			June 24, 1988
HO-10							Bulletin No:
Monitor Scope						HO-10-4

	              0.15 uf, 1.6 kV Capacitor [PN 23-94] NLA

The .15 uf, 1.6 kV capacitor [PN 23-94] at C30 and C31 are no longer
available from Heath Parts Replacement.  A .1 uf, 1.6 kV capacitor [PN
23-62] and a 0.047 uf, 1.6 kV capacitor [PN 23-91] is used as a
substitute.  Connect these two capacitors in parallel with the banded
ends in the same direction.
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