{"id":8218,"date":"2014-11-29T11:37:50","date_gmt":"2014-11-29T15:37:50","guid":{"rendered":"http:\/\/www.engineeringradio.us\/blog\/?p=8218"},"modified":"2023-03-26T09:21:48","modified_gmt":"2023-03-26T13:21:48","slug":"transmitter-haiku","status":"publish","type":"post","link":"https:\/\/www.engineeringradio.us\/blog\/2014\/11\/transmitter-haiku\/","title":{"rendered":"Transmitter Haiku"},"content":{"rendered":"\n

I wrote a little Haiku<\/a> about Thanksgiving dinner:<\/p>\n\n\n\n

\n

Telephone rings
Old transmitter beckons
Dishes get cold<\/p>\n<\/blockquote>\n\n\n\n

Not exactly the 5\/7\/5 of a traditional haiku, but close enough.\u00a0 This year, it was the nearly 30-year-old Broadcast Electronics FM35A at WEBE.\u00a0\u00a0 A set of readings from the remote control reveal; zero forward power, zero plate current, and 12.8 KV plate voltage.\u00a0 My first assumption was some sort of drive issue; a failed exciter or IPA driver.\u00a0 After starting the backup transmitter and making sure that it was running stably, I spoke with the program director and told him we would be out the next morning.<\/p>\n\n\n\n

Upon arriving at the transmitter site, I found the BE transmitter had no filament voltage.\u00a0 An obvious clue, I began working backward from the tube socket until I found this:<\/p>\n\n\n\n

\"Broadcast
Broadcast Electronics FM35A filament voltage regulating transformer<\/figcaption><\/figure>\n\n\n\n

This is the auto-transformer that regulates the filament voltage.  Schematically, it is noted as T204 and it is in series with one side of the filament transformer.  This one is burned open.  The bad news;  Broadcast Electronics does not stock this part, it is a special order item, the replacement part costs $2,800 dollars and it will take a few weeks to get here.  The good news, after digging through our stock of old transmitter parts, I found an exact replacement:<\/p>\n\n\n\n

\"Replacement
Replacement part, T204, BE FM35A<\/figcaption><\/figure>\n\n\n\n
\"Replacement
Replacement part nameplate, T204, BE FM35A<\/figcaption><\/figure>\n\n\n\n

We will be installing it on Monday morning.<\/p>\n","protected":false},"excerpt":{"rendered":"

I wrote a little Haiku about Thanksgiving dinner: Telephone ringsOld transmitter beckonsDishes get cold Not exactly the 5\/7\/5 of a traditional haiku, but close enough.\u00a0 This year, it was the nearly 30-year-old Broadcast Electronics FM35A at WEBE.\u00a0\u00a0 A set of readings from the remote control reveal; zero forward power, zero plate current, and 12.8 KV … Continue reading Transmitter Haiku<\/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":[256,46,189],"class_list":["post-8218","post","type-post","status-publish","format-standard","hentry","category-tech-stuff","tag-fm-transmitter","tag-repair-work","tag-webe"],"_links":{"self":[{"href":"https:\/\/www.engineeringradio.us\/blog\/wp-json\/wp\/v2\/posts\/8218","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=8218"}],"version-history":[{"count":5,"href":"https:\/\/www.engineeringradio.us\/blog\/wp-json\/wp\/v2\/posts\/8218\/revisions"}],"predecessor-version":[{"id":11228,"href":"https:\/\/www.engineeringradio.us\/blog\/wp-json\/wp\/v2\/posts\/8218\/revisions\/11228"}],"wp:attachment":[{"href":"https:\/\/www.engineeringradio.us\/blog\/wp-json\/wp\/v2\/media?parent=8218"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.engineeringradio.us\/blog\/wp-json\/wp\/v2\/categories?post=8218"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.engineeringradio.us\/blog\/wp-json\/wp\/v2\/tags?post=8218"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}