VFO Filter


Updates (SBM-104-2)

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SB-104 => 85-1516-1


PC Board

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HW-104 85-1633-1 is electrically identical.
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X-Ray

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Schematic

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HW-104 => 85-1633-2


Heathkit Changes (June 18, 1976) from HW/SB-104-47

A change in screening is being made on the VFO filter board, changing the board from PN 85-1516-1 to PN 85-1516-2 (and 85-1633-1 to 85-1633-2). Components will be deleted from the new board and the remaining components are being re-numbered, as follows:
[Old Board]
85-1516-1
85-1633-1
[New Board]
85-1516-2
85-1633-2
Value
R-1255R-1252150 ohms
R-1254R-125168 ohms
R-1266R-125368 ohms
C-1254C-1252105 pf
C-1256C-1254105 pf
C-1253C-1251.01 uf
C-1255C-1253 620 pf
The new board will be incorporated in all future productions runs.

PC Board

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X-Ray

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Schematic

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Filter Plot

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SB-104A => 85-1930-1


PC Board

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X-Ray

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Schematic

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Filter Plot

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