SX-9 Super SKYRIDER by the hallicrafters
Short Wave Radio
The UPS Store in Eureka, MO did a great job in packaging the radio. It was double boxed with a bushel of peanuts.
The radio was bubble wrapped and padding was placed inside to protect the tubes.
Radio "strip-tease" as the bubble wrap is slowly removed.
The magnificent condition of this 80 year-old radio exceeded my wildest expectations!
The black hammer-tone case appears to have been nicely repainted. The cheap, brown lamp-cord needs to be replaced.
Many of the old metal tubes have grid caps on top. This connection provides input signal to the tube.
The two round cylinders are 8 Mfd. electrolytic condensers used to filter hum from the power supply. These have been damaged and removed from the circuit. However they remain for cosmetic authenticity.
The short shiny tube at top right is a 465 Kilocycle quartz crystal filter. It helps to sharpen the tuning selectivity.
The tall square boxes are housing for the IF transformer coils. These transformers are used to couple the signal from one tube to the next, while sharpening the tuning.
This variable condenser provides fine tuning (bandspread). A six volt light bulb provides illumination through the rotating translucent disk. Power transformer is at bottom left corner.
MFGR No. 1731
Serial No. 655810
The company struggled with patent issues in the early years.
Large variable condenser provides course tuning. Switch at top right has been installed by someone but not used.
Two orange cardboard condensers have been installed to replace the older metal ones above.
Condensers are 40 Mfd, rated at 450 volts. Actual measurement shows voltage levels approximately 300 volts.
Speaker appears to have been replaced. Speaker uses old-fashioned high voltage electric magnet.
Test instruments include signal generator and strength meter.
Multi-wafer band switch is surrounded by adjustable mica trimmer condensers.
Note the old fashioned wax covered paper condensers.
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