Talk:Z code

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Hi, these codes were in constant use when I worked at Ongar Radio Station, a Marconi short wave station taken over by Cable & Wireless and then again by the British Post Office. I was there Sept 1965 to 1973.

The two I remember most used were

ZAL - "Alter waveLength" - used by receiving station to request a frequency change when current transmission was poor.

ZOA - "On Air" used by transmitting station to confirm transmitter operating normally (Or new frequency now "On-Air").

Typical usage (telex messages)

"ZCZC DE COLOMBO PLEASE ZAL GCQ37 GCQ37 TKS" - (request to change frequency by Colombo, Ceylon)

"DE ONGAR RADIO PLEASE MOM" - (response by Ongar Radio Station "please wait")

After a pause while the transmitter is retuned....



PAUL G3NJV —Preceding unsigned comment added by (talk) 20:28, 23 February 2010 (UTC)Reply[reply]

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