Heathkit RF-1U

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For more information, see this article's corresponding Wikipedia page: https://www.radiomuseum.org/r/heathkit_signal_generator_rf_1u_rf.html.
Heathkit RF-1U
Preliminary Information
Release Year 1973?
Mounting Technology Point to Point
Capacitor Types Aluminum Electrolytic, Paper and foil, mica
Destructive Entry No
Power Requirements
Input Voltage 240V 50Hz

Known Issues

This unit was exhibiting mains voltage on the output jack when the unit was switched off.

Causes

  • Across the line caps were shorted and the protective earth wire wasn't hooked up
  • Low B+

Solutions

  • Replaced the across the line caps and wired up the earth wire.
  • Replaced the main filter can.

Disassembly Notes

This unit uses valve technology so contains high voltages 150V+

To remove the outer case two flat head screws are located on the back.

Original Parts

Whole unit

Capacitor Specifications and Footprint Information
RefDes Qty Capacitance Voltage Mount Diameter/Size Height Lead Spacing Temp Type Brand Series
C17A, C17B, C17C 3 20 µF 350v Twist mount Multi section can
C19 1 0.05 uF 250v Axial Tubular paper
C12 1 0.1 uF 250v Axial Tubular paper

Replacement Parts

Whole unit

Capacitors
RefDes Qty Compatible Part Number Order Links
C17 A,B,C 3 EGXF351ELL200MJ25S / EKXG401ETD220MK20S DigiKey Mouser LCSC
C19 1 473MWR250K / 473MWR630K DigiKey Mouser LCSC
C12 1 104MWR400K / 104MWR250K / MEA104K250D01 DigiKey Mouser LCSC

If parts are not available or different selection is preferred, you can use the values in the Original Parts section to perform a parametric search.

Kits

Related Links

References