{"id":6122,"date":"2013-01-16T09:46:14","date_gmt":"2013-01-16T13:46:14","guid":{"rendered":"http:\/\/www.engineeringradio.us\/blog\/?p=6122"},"modified":"2023-04-08T20:17:44","modified_gmt":"2023-04-09T00:17:44","slug":"longevity","status":"publish","type":"post","link":"https:\/\/www.engineeringradio.us\/blog\/2013\/01\/longevity\/","title":{"rendered":"Longevity"},"content":{"rendered":"\n

One of the stations that we do contract work for installed a Broadcast Electronics FM20T transmitter on June 6, 2001. It is still running on the original tube, a 4CX15,000A. By my calculations, that is 11 years, 7 months, and 9 days, or 101,712 hours.<\/p>\n\n\n\n

\"Broadcast<\/a>
Broadcast Electronics FM20T transmitter<\/figcaption><\/figure>\n\n\n\n
\"BE<\/a>
BE FM20T filament meter<\/figcaption><\/figure>\n\n\n\n

The hour meter shows 101,168 hours, which accounts for some maintenance, and other anomalies.  Overall, the transmitter has a 99.5% up time. I do not think the transmitter suffered any failures, rather, things like the generator and the STL failed instead.<\/p>\n\n\n\n

\"EIMAC<\/a>
EIMAC 4CX12000A tetrode<\/figcaption><\/figure>\n\n\n\n

Almost twelve years on one tube is pretty impressive.\u00a0 I know that other Broadcast Electronics T model FM transmitters have similar tube life expectancies.\u00a0 I wonder what Broadcast Electronics’ secret is.<\/p>\n","protected":false},"excerpt":{"rendered":"

One of the stations that we do contract work for installed a Broadcast Electronics FM20T transmitter on June 6, 2001. It is still running on the original tube, a 4CX15,000A. By my calculations, that is 11 years, 7 months, and 9 days, or 101,712 hours. The hour meter shows 101,168 hours, which accounts for some … Continue reading Longevity<\/span><\/a><\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[15,106],"class_list":["post-6122","post","type-post","status-publish","format-standard","hentry","category-tech-stuff","tag-fm-transmitters","tag-tube"],"_links":{"self":[{"href":"https:\/\/www.engineeringradio.us\/blog\/wp-json\/wp\/v2\/posts\/6122","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.engineeringradio.us\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.engineeringradio.us\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.engineeringradio.us\/blog\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/www.engineeringradio.us\/blog\/wp-json\/wp\/v2\/comments?post=6122"}],"version-history":[{"count":6,"href":"https:\/\/www.engineeringradio.us\/blog\/wp-json\/wp\/v2\/posts\/6122\/revisions"}],"predecessor-version":[{"id":11462,"href":"https:\/\/www.engineeringradio.us\/blog\/wp-json\/wp\/v2\/posts\/6122\/revisions\/11462"}],"wp:attachment":[{"href":"https:\/\/www.engineeringradio.us\/blog\/wp-json\/wp\/v2\/media?parent=6122"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.engineeringradio.us\/blog\/wp-json\/wp\/v2\/categories?post=6122"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.engineeringradio.us\/blog\/wp-json\/wp\/v2\/tags?post=6122"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}