Talk:Z code

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....

"DE ONGAR RADIO GCQ37 NOW ZOA ZOA 0917z +++++"

I HOPE THIS IS A USEFUL CONTRIBUTION

PAUL G3NJV —Preceding unsigned comment added by 95.149.126.208 (talk) 20:28, 23 February 2010 (UTC)

External links modified
Hello fellow Wikipedians,

I have just modified one external link on Z code. Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:
 * Added archive https://web.archive.org/web/20120906015123/http://jcs.dtic.mil/j6/cceb/acps/acp131/ACP131F.pdf to http://jcs.dtic.mil/j6/cceb/acps/acp131/ACP131F.pdf

When you have finished reviewing my changes, you may follow the instructions on the template below to fix any issues with the URLs.

Cheers.— InternetArchiveBot  (Report bug) 22:09, 15 December 2017 (UTC)