July 31, 1987
HW-99							Bulletin No:
Novice CW Tranceiver					HW-99-1

	          Schematic Corrections - Oscillator Board

On the oscillator board schematic in the HW-99 Blue Book and the Assembly
Manual [PN 595-3185] make the following corrections:

	C243:   "47 pF" 	to read	"220 pF"
	C252:   "68 pF"	to read	"6.8  pF"

Mark these corrections on your shop schematics for future reference.
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			March 31, 1988
HW-99							Bulletin No:
Novice CW Transceiver					HW-99-2

	       No Audio at Headphones; Audio at Speaker Okay

In the HW-99 Assembly Manual [PN 595-3185], Illustration Booklet, page
36, Pictorial4-8 shows the labels at legs 2 and 3 of phone jack J1
interchanged; the wiring shown is correct.
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			November 28, 1988
HW-99							Bulletin No:
Novice CW Transceiver					HW-99-3

		             VFO Jumps OFF Frequency
			
If the VFO jumps off frequency when copying a station, the +12 VDC supply
may be unstable.  If so, try another 12 volt regulator at U1 [PN
442-674].
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			November 28, 1988
HW-99							Bulletin No:
Novice CW Transceiver					HW-99-4

	    Low Power On 10 Meters - Inadequate Drive From BFO
	
Within the past few months, low BFO output has been a problem with almost
every new HW-99 kit that's been reeived in Factory Service.  Replacing
Q203 [PN 417-863] and T201 [PN 52-193] in the BFO buffer circuitry on the
oscillator board has always corrected the problem.
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