Alan FS5951 is a temperature controlled crystal oscillator. My shortform Cathodon catalogue describes it as follows: Freq stability: 0.1x10-6 0 to 60C Osc supply: 5 volts 300 mW Oven supply: 9 volts 1.2 W (at 25 C) Warm-up time: 4 minutes to 0.2 x 10-6 Output: FS5951-01 TTL drive; FS5951-02 0.8v p-p Frequency adjustable via trimmer capacitor
The 5953 models had varicap diodes to allow phase locking but it doesn't look like the 5951 has this facility. Models were also available with alternative oven voltages of 5, 12, 15, 18, and 24 volts DC. There is no information listed for the FS5970 Although there is a photo of the case shown there is no pin-out information in the catalogue I have Pete ZL3UBW ----- Original Message ----- From: Alan Melia To: time-nuts@febo.com Sent: Wednesday, May 30, 2007 9:27 AM Subject: [time-nuts] Cathodeon oscillators Hi all, I have had a quick search but can't find any archive so I am probably going to ask a question that has been asked last week and last month and ....groan. If so please accept my apologies. I have been interested in time measurement for many years but not done a great deal in that area. I recently acquired a couple of Cathodeon High Quality oscillators type FS5951 and FS5970 these are, preversely 5MHZ and 10MHz respectively. The case is 1 in x 1.4in x 1in tall with 8 holes in the case but only 4 pins at the corners. Frustratingly this firm once lived at Linton just outside Cambridge (UK) just 50 miles up the road from me, and I have some data on some of their products but not on these items. I am suspecting from the size that they have a good quality crystal inside and are probably temperature compensated. With 4 pins it is also possible they are voltage adjustable. Though there an access hole in the top of the case to a trimmer. The voltage adjust would be useful for considering locking to GPS or Loran-C. Can anyone provide, or point me at, data sheets for Cathodeon oscillators ....Google does not help these days as Cathodeon "stopped trading" or probably was wound up, as they were owned by Philips, in 1992. Thanks Alan ( G3NYK ) _______________________________________________ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts -- Internal Virus Database is out-of-date. Checked by AVG Free Edition. Version: 7.1.411 / Virus Database: 268.17.33/678 - Release Date: 9/02/07
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