Heathkit HO-5404 Schematic

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SCHEMATIC OF THE
HEATHKIT®
STATION MONITOR
MODEL HO-5404
NOTES:
1. Component numbers are arranged in he follawing groups:
1— 99 Parts mounted on the chassis.
401—199 Parts mounted on the main circuit board.
41-299 Parts mounted on the demodulator clreult board.
2. All resistors are rated at 1/4-wall and havo a tolerance of 6% unless
'otherwise noted. Resistor values are In ohms (k = 1000; M =
5,000,000).
3, Capacitor values less than 1 ara in F (mlerofarads). All other capacitor
values are in pF (picofarads) unless otherwise noled,
4. Tho folowing symbols indicato DC voltages measured under varying
conditions; generally, ihe RTTY pushbutton ls dopressed, no signal
input, spots contored on the screen:
Tis symbot indicates a normal D6 voltage.
'This symbol Indicates voltages that vary with tho gotting of
'the balance controls,
'This. symbo! indicates voltages that vary with the settings of
the position controls,
This symbol indicates voltages measured with the Trap
pushbutlon depressed, no AF signa! input.
This symbol indicates vollages that vary with sottings of the
'Swoop and rango (100, 10 k, 100 k) pushbutton, SSB pushbut-
ort dD OND
ton dopressed.
5. This symbol indicates a crcult board ground.
6 'This symbol indicates chassis ground,
7 'This symbol indicatos a circuit board connection.
a This symbol indicates a component that is shown within the
'ircult board outline thats actually located on the chassis.
9. * (Q201) This voltage may vary trom 0 to -9 VOC, depending upon
the AF level prosent atthe Antenna input sockets.
10. Switches SW3, SW6, and SW9 aro shown in thelr depressed (In) posi:
tions, Switches SW4, SW5, SW7, and SW8 are shown in thelr releasod
{0ut) positions,
41. Pins P1 through PS are for connoction of the optional Pan Adaptor
'Module, Mode! HOA-5404-1,
12. Tho part within the shaded area Is critical to product safely. Replace
itonly with the proper Heath part or he exact equivalent,
13, Waveforms wore takon with the SSB and 1 kHz pushbutton depressed,
and the SWEEP control fully clockwise. The oscilloscope was set for
.2ms/DIV (pulse spacing varies with the salting of the SWEEP control).
Copyright © 1985,
Heath Company
Allights Reserved
Part of 595-3374-01 Printed inthe United Statos of America,