Summary of the NERG Meeting 12^th September 2002

This meeting was held in the Greenhills Community House and was well attended with about 30 members present.

Well-known NERG, Gerhard VK3EWM, gave a well-received talk on German Spy Radios. Gerhard presented a little background history of the 2nd world war from his own perspective (first in nappies, then in air raid shelters!) and showed us circuits and photos of some of the equipment being used at the time by covert radio operators. Amongst these were several valve transmitters and receivers that used the least possible number of components (strictly CW!). The circuits were quite ingenious and were often potentially lethal (no mains isolation transformers here!). A puzzle remains however as to why all the writing on the German radios were written in English? Was it to confuse the enemy, or had they been added after the war by British collectors?

I thought the modification to a standard receiver that consisted of a plug-in adaptor for the 6L6 audio tube which made the unit into a transmitter was very cunning.

| NERG Home | Meeting Reports |