Some of my late fathers (Martyn Lindars) articles:
The Lindars ‘ CM.7rsquo; Rotatory Impulse Transmitter and Transistorized Counter
"Back to square one"Interesting article on the 6S3T
by C.M.Lindars - Radio Bygones No.57
"The excellent Radio Constructor Magazine articles in Oct 1970 and in March/April 1971 by Martin Lindars
covered extensive modifications ..." written by the Vintage Radio Group.
Please take a look at their excellent forum:UK Vintage Radio Repair and Restoration https://www.vintage-radio.net
This is the main page of H.A.C. Short-Wave Products kits pages, simple and inexpensive
short wave receiver kits for the beginning listener. ... for their permission to reproduce the H.A.C.
Short-Wave Products article written by Mr C.M. Lindars.
OTHER INTERESTING LINKS:
The really interesting web site of G6OHM http://g6ohm.webs.com/
A Great Web Site by G4YDM please have a look https://g4ydm.wordpress.com/
Ashton in Makerfield Amateur Radio Club http://www.aimarc.co.uk/
MY LOCAL CLUB IN YEOVIL: http://yeovil-arc.com/