Most of the articles below require Adobe Acrobat 4.0 or later to read. 

The Acrobat reader is available free:

TechTalk Articles

1. A New Approach to Restoring the R-390A RF Module

2. Adapting "Found" Meters to the R-390A

3. Current Inrush Limiters (see also Other Articles below)

4. Improving the R-390A Audio Response

5. The Collins CU-168/FRR Antenna Multicoupler

6. Cooling the RCA CU-5069/FRD-10A(V) Multicoupler

7. Cooling the Collins HF-2050

8. Refinishing the R-390A Front Panel

9. A Programmable Crystal Substitute

10. A SSB Detector for the R390A

11. Using the HP Z3801 GPS Discipline Receiver As A Lab Frequency Standard New!!!

12. Building a Direct Digital Synthesis VFO  New!!!

Other Articles

Inrush Current and Voltage Spike Limiters - Exchange of Views

Jan Skirrow
Copyright © 1998 to 2005 All rights reserved.
Revised: October 07, 2005 .