The R-390A Frequently Asked Questions Page

Electric Radio Magazine Articles
This page contains a bibliography of Electric Radio Magazine articles about the R-390 series of receivers and related equipment. This listing covers issues 1 through 119 of Electric Radio Magazine.

This document is a compilation of the wisdom shared by members of the online community of R-390A enthusiasts. As such, it is advice to those who endeavor to maintain and restore the R-390A family of receivers. The information is shared without warranty, expressed or implied. This information is in the public domain and can be freely copied or shared. Appropriate attribution is appreciated.

R-389 Receiver

  • "The Collins R-389/URR Receiver - Low Frequency Specialist - Part 1" by Ray Osterwald, NØDMS, ER # 85 (May 1996), Page 4

  • "The Collins R-389/URR Receiver - Low Frequency Specialist - Part 2 - Electrical design" by Ray Osterwald, NØDMS, ER # 86 (June 1996), Page 4

  • "The Collins R-389/URR Receiver - Low Frequency Specialist - Part 3 - RF design" by Ray Osterwald, NØDMS, ER # 87 (July 1996), Page 4

  • "The Collins R-389/URR Receiver - Low Frequency Specialist - Part 4 - IF Amplifier Subchasssis" by Ray Osterwald, NØDMS, ER # 89 (September 1996), Page 4

R-390 Receiver

  • "R-725, R-389, R-390 and R-391 US Military Contract List" by Tom Marcotte, N5OFF, ER # 97 (May 1997), Page 14

  • "12BW4 Rectifier Tubes in the Collins R-390/R-390A" by Dexter Francis, NØYLJ, ER # 106 (February 1998), Page 15

R-390A Receiver

    Audio
  • "REAL Audio for the R-390A" by Bill Kleronomos, KDØHG, ER # 42 (October 1992), Page 26

  • "Changes to 'Real Audio for the R-390A' in ER#42", by Bill Kleronomos, KDØHG, ER # 43 (November 1992), Page 18

  • "Real Audio for the R-390A - Revisited" by Bill Kleronomos, KDØHG, ER # 94 (February 1997), Page 34

    Contracts
  • Letter from Wally, K5OP to Ray Osterwald, NØDMS regarding R390a contract numbers, ER # 27 July 1991), Page 28

  • "R-390A Contract/Order Number Update" by Les Locklear, ER # 71 (March 1995), Page 18

  • "R-390A Contract/Order Number Update - Number 2" by Les Locklear, ER # 72 (April, 1995), Page 18

  • "R-390A Contract/Order Number Update - Number 3" by Les Locklear, ER # 78 (October, 1995), Page 10

  • Letter to the ER Editor from Tom Marcotte, N5OFF, requesting contract information from readers, ER # 79 (November 1995), Page 2

  • "R-390A Survey/Order Number List" by Les Locklear, ER # 89 (September 1996), Page 18

  • "R-390A Survey/Order Number List No. 5" by Les Locklear, ER # 104 (December 1997), Page 12 (Includes a picture of the infamous 'St. Juliens Creek' incarceration of R-390A receivers)

  • "R-725, R-389, R-390 and R-391 US Military Contract List" by Tom Marcotte, N5OFF, ER # 97 (May 1997), Page 14

    General
  • "The R390a Receiver: A Milestone in HF Communications" by Ray W. Osterwald, NØDMS, ER # 24 (April 1991), Page 22

  • Letter to the ER Editor from Ray W. Osterwald, NØDMS regarding the April, 1991 article in ER, ER# 40 (August, 1992), Page 22

  • "The R390a Receiver: A Milestone in HF Communications, Part 2" by Ray W. Osterwald, NØDMS, ER # 25 (May 1991), Page 22

  • "The R390a Receiver: A Milestone in HF Communications, Part 3 - The Competition-Grade R390a" by Ray W. Osterwald, NØDMS, ER # 26 (June 1991), Page 22

  • Letter from Dallas Lankford to the ER Editor regarding use of the unbalanced antenna connector, ER # 26 (July 1990), Page 29

  • "The Collins Linear PTO, Part one", by Ray W. Osterwald, NØDMS, ER # 30 (October 1991), Page 14

  • "The Collins Linear PTO, Part two", by Ray W. Osterwald, NØDMS, ER # 31 (November 1991), Page 20

  • "R390A Bits and Pieces" by Ray W. Osterwald, NØDMS, ER # 34 (February 1992), Page 16

  • Letter to the ER editor from Roger Faulstick, KD4AS, commenting on Ray Osterwald's articles, ER # 42 (October 1992), Page 35

  • "A Product Detector for the R-390A" by Bob MacDonald, N2NIR, ER # 58 (February 1994), Page 22

  • "An SSB Adapter for the R-390A" by Mike Bohn, KG7TR, ER # 96 (April 1997), Page 30

  • "Oh No, Not Another Product Detector Article!!!" by Charles Talbott, K3ICH, ER # 99 (July 1997), Page 35

  • "Calibration of the Cosmos PTO" by Thomas Marcotte, N5OFF, ER # 107 (March 1998), Page 30

  • "The R-390A RF Module ... A New Approach" by Jan Skirrow, VE7DJX, ER # 113 (September 1998), Page 36

  • "The Million Dollar radio" by Tom Marcotte, N5OFF, ER # 117 (January 1999), Page 8

    Restoration
  • "Repainting R390/390A Front Panel" by Dave Metz, ER # 37 (May 1992), Page 18

  • "R-390A Front Panel Restoration and PTO Repairs" by Ray W. Osterwald, NØDMS ER # 38 (June 1992), Page 18

    Tubes
  • "Improved Heater Regulator for the R-390 Receiver", by Bill Kleronomos, KDØHG, ER # 9 (January 1990), Page 15

  • "Radioactive Tubes" by Dave Metz ER # 43 (November 1992) Page 18

  • "More About Those Radioactive Tubes" by Walt Hutchins, KJ4KV, ER # 46 (February 1993) Page 7

  • "Updating That R-390A - An Improved Current Regulator and Noise Limiter" by Bill Kleronomos, KDØHG, ER # 70 (February 1995), Page 24

  • "The Not-So-Eternal Current Regulator 3TF7" by Reinhard Wieschhoff-van Rijn, ER # 84 (April 1996), Page 10

  • "R-390/R-390A Current Regulator Substitute" by Dale, N2DM, ER # 86 (June 1996), Page 39

  • "12BW4 Rectifier Tubes in the Collins R-390/R-390A" by Dexter Francis, NØYLJ, ER # 106 (February 1998), Page 15

R-392 Receiver

  • "The R-392/URR", by Walt Hutchins, KJ4KV, ER # 20 (December 1990), Page 4

  • "The R-392--A Minature R-390" by Eugene Senti, WØROW, ER # 38 (June, 1992), Page 28

R-725 Receiver

  • "The Uncommon R-725/URR", by Thomas F. Marcotte, P.E., N5OFF, ER # 84 (April 1996), Page 14

T-368
Transmitter

  • "The Ultimate Boatanchor" by Tony Wheeler, K9BBA, ER # 3(July 1989), Page 12

  • "T-368-C Audio Mods" by Bob Sitterley, K7POF, ER # 3 (July 1989), Page 25

  • "Favorite Military Radios" by Walt Hutchens, KJ4KV, ER # 5 (September 1989), Page 7

  • "Using the T-368 Exciter" by Dave Mills, AJ7O, ER # 21 (January 1991), Page 26

  • "The T-368 Exciter as a QRP Rig" by Albert A. Roehm, W2OBJ, ER # 52 (August 1993), Page 4

  • "T-368 Modifications" by Bill Dudan, N2KQA, ER # 53 (September 1993) Page 26

  • "Barker & Williamson T-368C/URT" by Randy Best, WA7CPA, ER # 69 (January 1995), Page 20

  • Letter to the ER Editor from Randy Best, WA7CPA regarding advice about his article printed the previous month, ER # 70 (February 1995) Page 2

  • Letter to the ER editor from Bill Braden, WC7O regarding his T-368 Transmitter, ER # 70 (February 1995), Page 2

  • Letter to the ER Editor from Bill Kipping, KE7KK, ER # 108 (APRIL 1998), PAGE 17

Other
Equipment

  • "The CV-157 SSB Demodulator", by Michael D. Runyan, KK7F, ER # 25 (May 1991) Page 14

  • "Radio Frequency Oscillator O-152/URA-13" by George Rancourt, K1ANX, ER # 86 (June 1996), Page 30

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Version: 3 - - Last revision: 2006-Oct-01