I know this information has appeared here, but I haven't been able to find it. Which are the "bad" Eimac 3-500Z date codes? I have a pair that appear to be unused that have the code 8240. Does this mean they were manufactured on the 40th day of 1982? -- 73, Vic, K2VCO Fresno CA http://www.qsl.net/k2vco/