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Heathkit SB-220 - Page 23

Heathkit SB-220
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Page 18
TAKING CARE NOT TO CUT THE OUTER SHIELD OF
VERY THIN WIRES. REMOVE THE OUTER INSULATION.
f
( )
Prepare an 11-112" length of RG-58AlU coaxial cable
as shown in Pictorial 2-4, Part B. Twist the center
conductor wires together and apply
a
small amount of
solder to each end to hold the small strands together.
In a like manner, twist and solder the end of the shield
braid.
PUSH BACK THE SHIELD.THEN MAKE AN OPENING IN
THE SHIELD AND BEND OVER As sHowN.PIcK OUT
(d
Refer to Pictorial 2-4, Part
C,
and prepare a 13" length
THE INNER LEAD.
of RG-58AlU coaxial cable as shown.
(4
Refer to Pictorial 2-5 and connect the 1-114" end of
the center conductor of the 13" coaxial cable to lug
7
of wafer 1 of switch
CZ
(NS).
Connect the shield braid
REMOVE THE INNER INSULATION AND STRETCH OUT
to solder lug
DF
(NS).
THE SHIELD.APPLY A SMALL AMOUNT OF SOLDER TO
THE
END
OF
THE
SHIELD
AND
THE
INNER
LEAD.USE
I
cut each lead of a 500 volt (smailer)
.OOI
IF
disc
ONLY ENOUGH HEAT FOR THE SOLDER TO FLOW.
capacitor to a length of 314". Connect one lead of this
capacitor to lug
7
of wafer 1 of switch CZ 6-2). The
SOLDER
--
other lead will be connected later.
(JConnect the 2" end of the center conductor of the
11-112" coaxial cable to lug 1 of wafer 1 of switch CZ
(S-1).
Connect the braid to solder lug
DF
6-2).
-8)
NOTE:
The other ends of the coaxial cables will be
p-ll
-112"
SOLDER
4
connected later.
-2''-
SOLDER
/
SHIELD BRAID
314"
114"
(SOLDER)
INSULATION
SHIELD'BRAID
(SOLDER)
PICTORIAL
2-4
NOTE: When you prepare coaxial cables in the following
steps, refer to Part A of Pictorial 2-4 for the method of
removing the inside of the cable from the shield braid. Be
careful not to melt the inner insulation.
PICTORIAL
2-5

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