Heathkit Information, Modifications and Rebuilds
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I like the Heathkit SB-Line “green” styling and have made a number of new units in this style as well as modifying and completely re-engineering some others - the following projects show the results of my efforts. Some of these are relatively simple modifications and the rest are complete rebuilds in order to improve the performance for use in today’s crowded European band conditions.

IF Filters 1
Lattice Filter at 3.395MHz
IF Filters 2
Measurements on and circuits of some Heathkit crystal filters
RF Switch Box
My thoughts on aerial selection and sharing
SB-101 Modifications (U)
Addition of 160m on a new band position.
SB-101 Refurbishment
Modifications and changes to overcome component ageing.
SB-101 Rebuild (U)
Complete rebuild on a new chassis with many additional features
SB104 Modifications
Suggested modifications to an SB104/104a.
SB-301 Rebuild (U)
Complete rebuild on a new chassis with many additional featurres
SB-401 Changes
Change keying system to full break-in using grid blocked keying plus an electronic T/R switch and addition of 160m.
SB-Line Inductors
Information and measurements on some inductors
Spares and Repairs
Some suggestions for replacing broken or worn parts
Station Console
A variant on the SB-630 Console
Valve Power Supply
A multi-voltage PSU in the Heathkit style for valve peripherals
ValveTransverter
Three band transverter styled to match the SB-101
WARC/Other Bands (N)
Some thoughts on adding other bands
To follow as time allows:
Station Monitor
Panadaptor

N) = New, (U) = Updated, blank = no recent change