Working on getting a Pierce Oscillator to Oscillate

[duke37]

Thanks a lot CDRIVE, I will build that one later, and see how well it works. I am convinced I am doing something obviously wrong, it can't be this hard to build an oscillator, can it? They are relatively simple circuits...

They may have few components but are quite complex. The crystal and choke do not have all their parameters given so it is difficult to simulate. The gain must be adequate to compensate for losses and the phase must be right. The fact that there is a plethora of designs indicates that some solutions work in some cases only.

Many years ago I made a 100kHz crystal oscillator using a pair of transistors (red spot?) with the crystal connected between the emitters. This worked well and was consistent with the Droitwich 200kHz transmitter, slipping one cycle every 10 minutes or so. This type of oscillator was necessary because of the high resistance of the large crystal bar.

 

[Zerosum]

I think I'll try some more Colpitts circuits myself, maybe the Pierce is just a bit hit or miss?

On another note,
What do you guys think of this oscilloscope:
http://www.ebay.ie/itm/UTD2102CEL-1..._Measurement_Equipment_ET&hash=item460679d726

I am a little reluctant to spend this kind of money on something like this that I got on the internet, but the specs seems pretty good. Does this look like a decent scope?

Thanks for your help!

 

[(*steve*)]

There's a lot of digital scopes coming onto the market with specs that a few years ago would have demanded a far higher price.

What I would do is google the model number and see if there are any reviews.

If you can't understand (or perhaps doubt) the reviews, then point them to us and I'm sure someone can offer comments.

 

[CDRIVE]

I think you'll find that because of Chinese manufacturing practices there are many scopes marketed under different manufacturer names and models but they're all the same scope made by one manufacturer. This practice is, by no means, limited to scopes.

Chris