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721A US version

721A ; Hewlett-Packard, HP; (ID = 1633826) Equipment 721A ; Hewlett-Packard, HP; (ID = 1633827) Equipment
721A ; Hewlett-Packard, HP; (ID = 1633828) Equipment 721A ; Hewlett-Packard, HP; (ID = 1633829) Equipment
721A ; Hewlett-Packard, HP; (ID = 1633830) Equipment
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721A ; Hewlett-Packard, HP; (ID = 1633826) Equipment
Hewlett-Packard, HP;: 721A [Equipment] ID = 1633826 933x773
Select picture or schematic to display from thumbnails on the right and click for download.
For model 721A US version, Hewlett-Packard, (HP); Palo Alto, CA
Country:  United States of America (USA)
Manufacturer / Brand:  Hewlett-Packard, (HP); Palo Alto, CA
Year: 1959 Category: Service- or Lab Equipment
Semiconductors (the count is only for transistors) 7:
Wave bands - without
Power type and voltage Alternating Current supply (AC) / 50 to 60 cycles, 115V or 50 to 60 cycles, 230 Volt
Loudspeaker - - No sound reproduction output.
Power out
from Model: 721A [US version] - Hewlett-Packard, HP; Palo Alto
Material Metal case
Shape Tablemodel, with any shape - general.
Dimensions (WHD) 7 x 4.375 x 5.25 inch / 178 x 111 x 133 mm

The Hewlett Packard 721A is an AC operated DC power supply.  Has a variable output from 0 to 30VDC and a full load current of 150mA. Has output overload protection.  Input power can be changed from 115V to 230V operation by changing jumpers on the power transformer.

The Schematic and complete manual located here:

NOTE: There is another Hewlett Packard model HP-721A but it is a completely different unit distributed in Europe.

Net weight (2.2 lb = 1 kg) 4 lb 0 oz (4 lb) / 1.816 kg
Literature/Schematics (1) see notes for link to schematic and manual

Model page created by William Noble. See "Data change" for further contributors.

All listed radios etc. from Hewlett-Packard, (HP); Palo Alto, CA
Here you find 356 models, 322 with images and 123 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.