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Solid State 3TF7 Ballast tube for Collins R-390 and others
Solid State 3TF7 Ballast tube for Collins R-390 and others

Solid State 3TF7 Ballast tube for Collins R-390 and others

$ 16.36

Availability: 69 in stock
  • Condition: New
  • Type: 3TF7
  • MPN: 3TF7
  • Model: R-390
  • Country/Region of Manufacture: United States
  • Brand: AE

    Description

    Offered here is a solid state current regulator to replace the 3TF7 ballast tube in the R-390 and other receivers.  It regulates AC heater current to a nearly constant 300 mA using a modern linear regulator IC.   the I've sold many of these in the past and have recently started building them again due to a recent  request.