Heathkit 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 and the following projects show my efforts at modifying and ‘improving” some of the original designs. Some of these are relatively simple modifications and the rest are complete rebuilds in order to improve the performance in today’s crowded European band conditions.

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
Complete rebuild on a new chassis using 7360/6AR8 mixers, additional modes and full break-in on CW with all electronic change-over, transverter and linear amplifier interfaces.
SB104 Modifications
Suggested modifications to an SB104/104a.
SB-301 Rebuild
Complete rebuild on a new chassis with 7360 mixers, all HF bands including WARC, solid state detectors and AF sub-systems, full break-in on CW and addition of FM.
SB-401 Changes
Change keying system to full break-in using grid blocked keying plus an electronic T/R switch and addition of 160m.
Spares and Repairs
Some suggestions for replacing broken or worn parts
Station Console
A variant on the SB-630 Console
ValveTransverter
Three band transverter styled to match the SB-101
To follow as time allows:
Station Monitor
Panadaptor