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Extracted text from Heathkit HD 1234 Manual 2 (Ocr-read)
Page 1
HEATHCOMPANYPHONEDIRECTORY
The foilomna telephone numbers are aired lines lo the depanmem lirted:
Kit orders and delW inlormation ...................... (616) 982541 1 Cle4n ............................................ (616) 8823661 Replacemem Pam.. ............................... (616) 982.3~1 TBChhicd Assistance RC, Aud'b, and E&onic hgans ................. (616) 982.3310 hateur Radio ................................... (616) 882-3286 Test Equipment. Slmbe Lighfs, Cdcuiatoro, CIOC~, Weather In8humenlP ........................ (616) 982.3315 Television ........................................ (616) 982-3307 Aubmme, Mame. Wliances, SBardty. &nerd Prduck.. ........................ (515) 9825496
YOUR HEATHKIT 90-DAY FULL WARRANTY
Page 2
Assembly
and
Operation
of the
COAXIAL SWITCH
MODEL HD-1234
TABLE OF CONTENl'S
Introduction ............................. 1 Parts List ............................... 2
Step-by-step Assembly ......................... 4
Installation and Applications ...................... 9 ......................... In Case of Difficulty 13 Specifications ............................. 14 Warranty ........................ Inside front cover
Customer Service ..................... Inside rear cover
INTRODUCTION
The Model HD-1234 Coaxial Switch is designed to switch one RF source or
receiver to any one of several antennas or RF loads, while grounding the unused
connectors.
The Coaxial Switch can be used in conjunction with the
Heathkit RF Load
Wattmeter for off-theair tuneup, and can then be immediately switched to an
antenna for normal transmission and reception.
A mounting bracket is provided to permit you to conveniently hang the switch
on the side of an equipment enclosure, onto a desk, or on a wall. The switch
may be used handily without the mounting bracket in any application which
suits the needs of your transmission system.
HEATH COMPANY
BENTON HARBOR. MICHIGAN 49022
Page 13
Page 12
@$b=**--4*5--3
OPERATION
Refer to Schematic Diagram, Figure 4.
ROTARY SWITCH
m
REAR WAFER ,FRONT WAFER I
When the switch knob is rotated to either the @ or the @ positions, all
output connectors are grounded except the C connector. WARNING: DO NOT
OPERATE THE TRANSMITTER INTO THE COAXIAL SWITCH WHEN THE
POINTER IS AT THE
@ OR THE @ POSITION. When the Switch is in
either of these positions, the transmitter is connected to an open circuit.
I t I I
Figure 4
