Yesterday I was a little bored and I was staring to a box full of quartz cristals. I was wondering what frequency was, especially a very old one with russian marks on it. I know from an elder that the number on the Russian cristal is not the frequency but some sort of code. After I contemplate various possibilities of transistor oscillators, I came up with a simple, reliable and versatile TTL configuration, 'a classic' to say it simple.

It's a 74LS00 oscillator in series configuration, the schematics is pretty self explanatory. Now I cand measure with precision the exact frequency of my 38.9 MHz crystals which, by the way, are overtone! I will make nice filters for 12.95 MHz on long winter days! Without a quartz crystal, it self-oscillate around 50 MHz with a very nice sinus wave! Some are curious about my lab tools.

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Well, I do have some stuff collected in years. The most important tools in a electronics laboratory are the scope and the signal generator. My scope is a AGILENT DSO 1014A, a four channel 100 MHz 2GSa/s scope. Sociology A Brief Introduction By Richard T Schaefer Ebook Store. Can You Feel The Love Tonight Pdf String Quartet For Weddings. I wish it was a analog one but they are very big and expensive. Because you can use it on some measurements where a digital scope is useless due to alias issues. This scope is a nice one but, in reality, is made by RIGOL:-) Either way, it's a nice piece of equipment!

Agilent's DSO1000A Series oscilloscopes deliver the performance and features you'd expect in a big scope - and the portability and low price you require in a small one. They've redefined the economy scope by giving you more: more signal viewing, more capabilities and more productivity. Description from Agilent webpage: Capture long time periods with high resolution All models provide provide up to 20 kpts per channel of convenient acquisition memory standard. The scope will maintain high-resolution acquisitions even at slower timebase settings so you can see the details on your signals. See your signals more clearly The DSO1000A Series incorporates a bright, crisp LCD color display. You can quickly view your signal from almost any angle. Unlike conventional scopes that always require menus to be on, the entire 5.7-inch diagonal screen is available for waveform display as needed.