UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - 4 Metre Converter

John KC0G · 2nd Dec 2017, 6:48 pm

The design in the 4th edition of the RSGB handbook originally appeared in the October 1962, December 1962 and February 1963 issues of the RSGB Bulletin. The design came from the RSGB Technical Development Sub-Committee.

There was "A Low Noise Convertor for 70 Mc/s" by Paul Harris, G3GFN, in the April 1964 issue of the RSGB Bulletin. it used 2 * 6CW4, 1 * EF91 and 1 * ECC81 valves. The layout was different from the picture above. There were additional notes in the May 1965 issue.

There was "A High Performance Nuvistor Convertor for 70Mc/s, by M. Gibbings, G3FDW in the June 1966 issue of the RSGB Bulletin. This is not the one.

I looked in the indexes up to December 1970. I wonder if it could have appeared in the "Four Metres and Down" or "Technical Topics" columns.

I also looked at the Short Wave Magazine indexes from Mar. 1959 to Feb 1965, and found nothing appropriate.

2nd Dec 2017, 6:48 pm	#5
John KC0G Hexode Join Date: Mar 2009 Location: Minneapolis, Minnesota, USA. Posts: 278	Re: 4 Metre Converter - but which design? The design in the 4th edition of the RSGB handbook originally appeared in the October 1962, December 1962 and February 1963 issues of the RSGB Bulletin. The design came from the RSGB Technical Development Sub-Committee. There was "A Low Noise Convertor for 70 Mc/s" by Paul Harris, G3GFN, in the April 1964 issue of the RSGB Bulletin. it used 2 * 6CW4, 1 * EF91 and 1 * ECC81 valves. The layout was different from the picture above. There were additional notes in the May 1965 issue. There was "A High Performance Nuvistor Convertor for 70Mc/s, by M. Gibbings, G3FDW in the June 1966 issue of the RSGB Bulletin. This is not the one. I looked in the indexes up to December 1970. I wonder if it could have appeared in the "Four Metres and Down" or "Technical Topics" columns. I also looked at the Short Wave Magazine indexes from Mar. 1959 to Feb 1965, and found nothing appropriate.