Various articles
Power rectification design
I found this old application note below highly useful and educative. The note is a reprint from the Mullard Technical Communications Vol. 7, No. 68, January 1964 issue, and does not seem to be available anywhere, so I thought I'd better make a scan for others to enjoy...
I found this old application note below highly useful and educative. The note is a reprint from the Mullard Technical Communications Vol. 7, No. 68, January 1964 issue, and does not seem to be available anywhere, so I thought I'd better make a scan for others to enjoy...
mullard_-_power_rectification_with_silicon_diodes_1964_-_komprimeret.pdf | |
File Size: | 7213 kb |
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Kalundborg frequency reference
Below, you will find the two out of three sections I have of an article series from 1974, in Danish, describing the construction of a receiver for the Kalundborg long-wave service in Denmark, operating back then at 245 kHz governed by a rubidium reference. Later, the frequency was changed to 243 kHz. The transmitter was taken out of service in 2007, but in 2011 the service was reassumed, though only for a limited period of time each day. The schedule is found under https://www.dr.dk/radio/oversigt (check DRLB). Update: The link does no longer includes the schedule for the longwave service, but there's a generic overview at https://dr.custhelp.com/app/answers/detail/a_id/2076/~/hvilke-programmer-sender-dr-på-langbølge%3F
The design is rather typical for the era, and is guaranteed to perform rather poorly, the reasons being too numerous to cover here. However, for the purpose of studying the design, and to perhaps get inspired to make better designs, and for other frequencies, the articles serve a purpose.
Below, you will find the two out of three sections I have of an article series from 1974, in Danish, describing the construction of a receiver for the Kalundborg long-wave service in Denmark, operating back then at 245 kHz governed by a rubidium reference. Later, the frequency was changed to 243 kHz. The transmitter was taken out of service in 2007, but in 2011 the service was reassumed, though only for a limited period of time each day. The schedule is found under https://www.dr.dk/radio/oversigt (check DRLB). Update: The link does no longer includes the schedule for the longwave service, but there's a generic overview at https://dr.custhelp.com/app/answers/detail/a_id/2076/~/hvilke-programmer-sender-dr-på-langbølge%3F
The design is rather typical for the era, and is guaranteed to perform rather poorly, the reasons being too numerous to cover here. However, for the purpose of studying the design, and to perhaps get inspired to make better designs, and for other frequencies, the articles serve a purpose.
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