Front End Circuit Board - Heathkit HR-1680 Manual

Geegrimarexirs
KEY HEATH QTY. DESCRIPTION
CIRCUIT
KEY HEATH QTY. DESCRIPTION
CIRCUIT
No,
Part No.
Comp. No.
No. Part No.
Comp. No.
Inductors (cont'd.)
Diodes-Transistors (cont'd.)
Cé 40-1786 1 13 wH toroid L106
C8 40-487
1 300 nH peaking coll
RFC102
3. Part number and type number.
(orange-black-brown)
4. Part number with a type number other than the one
C3 45-82
1 350 4H RF choke
RFC101
listed.
C9 40-1888 1 3.395 MHz trap TC101
E2 417-863 3 MFE131 transistor Q107, Q102,
Q103
D103, Dios, MISCELLANEOUS
Oro. ane Hi 432-121 4 PCB pin
D114, D115,
D116, D117, N15 254-4 2 #6 lockwasher
Die. ' N18 © 255-142 2 6-32 x 5/8" spacer
NOTE: Transistors may be marked for identification in any of
the following four ways:
1. Part number.
2. Type number.
Page 9
PART FROM PACK #5
85-2072-1 1 Front end circuit board
against the following list.
KEY HEATH QTY. DESCRIPTION CIRCUIT
No. Part No. Comp. No.
RESISTORS
NOTES:
1. Resistors may be packed in more than one envelope.
Open all of the resistor envelopes in this pack before
you check them against the following list.
2. The following resistors have a tolerance of 5% unless
otherwise noted. 5% is indicated by a gold fourth band.
1/4-Watt
Al 6-470-12 3. 47 2 (yellow-violet- R237, R248,
black) R249
"KEY HEATH QTY. DESCRIPTION CIRCUIT
1/4-Watt (Cont'd.)
Ai
6-101-12
7 100 © (brown-biack-brown)
R203, R205,
R221, R222,
R229, R245,
. R253
Al
6-2370-12
1-287 11, 1% (red-orange-
R201
violet-black)
brown)
At 6+122-12 1 1200 2 (brown-red-red) R232