Custom frequency Crystals - where do you order? - Page 1
Forum section: electronics / projects

author: tkamiya
author_rank: Super Contributor
timestamp: September 18, 2018, 08:49:19 pm
content: I used to order custom crystals from JAN Xtals. It is sort of local.But I understand they are out of business. Calls do not go through and email goes unanswered. I contacted someone else and I received a very strange response. They do custom. There is no price. $100 minimum order. If you want one, it's $100. She'll only give me the price IF I place an order, and doesn't even give me an idea as to how many $100 will get me. That's very rude. So I discounted them as viable source.Does anyone know a reasonable source in United States? Or elsewhere that will do custom frequencies and prices right?If this doesn't work, I may have to start thinking of making a small DSP board that is customizable.

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: September 18, 2018, 09:25:11 pm
content: There are a lot of programmable MEMS oscillators around now that may be worth a look if you need an oddball clock frequency

author: tkamiya
author_rank: Super Contributor
timestamp: September 18, 2018, 10:09:11 pm
content: I did not know ANYTHING about this.Truth be told, last time I was active in DIY electronics was in 80s. I recently reappeared. Repairing ham radio equipment, a big surprise was, there were no longer Crystals in odd frequencies.I'll have to read up on this. Do you suggest good site for this? I read through WIKI but it really does not talk about programmable ones.

author: oPossum
author_rank: Super Contributor
timestamp: September 18, 2018, 10:15:29 pm
content: The Silicon Labs programmable oscillators are quite popular with hams for DIY projects.https://www.silabs.com/products/timing/oscillators

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: September 18, 2018, 10:17:12 pm
content: Just look at Digikey, under "programmable oscillators"e.g.https://www.digikey.co.uk/product-detail/en/sitime/SIT8008BI-71-XXX-000.FP0000E/1473-1525-2-ND/61881291-110MHz with 6 decimal place programmability and stability to 20ppmI think Digikey offer preprogramming on some ranges

author: tkamiya
author_rank: Super Contributor
timestamp: September 18, 2018, 10:22:11 pm
content: Wow.... This is exciting.Prices are reasonable for eval kits as well. I'll have to try this for myself.Folks, thank you VERY MUCH.

author: edavid
author_rank: Super Contributor
timestamp: September 18, 2018, 10:26:34 pm
content: Quote from: mikeselectricstuff on September 18, 2018, 09:25:11 pmBut they usually have too much phase noise for radio applications.

author: tkamiya
author_rank: Super Contributor
timestamp: September 18, 2018, 10:39:05 pm
content: Looking at suggested applications, manufacturer does not seem to think so. Only negative for me is, they are all surface mount. So I will have to create a daughter board and make it into through hole.

author: oPossum
author_rank: Super Contributor
timestamp: September 18, 2018, 10:39:41 pm
content: A few HF radios using Silicon Labs programmable oscillators. There are *many* more. It is the easiest way to get a stable tunable local oscillator.http://fivedash.com/index.php?main_page=product_info&cPath=1&products_id=17http://fivedash.com/index.php?main_page=product_info&cPath=1&products_id=7http://www.hfsignals.com/index.php/ubitx/

author: drussell
author_rank: Super Contributor
timestamp: September 18, 2018, 10:50:06 pm
content: FromRyanG's "Odd Frequency Crystal" thread:(https://www.eevblog.com/forum/repair/odd-frequency-crystal/)Quote from: drussell on April 21, 2018, 09:00:15 pm

author: tkamiya
author_rank: Super Contributor
timestamp: September 18, 2018, 10:51:10 pm
content: Thank you Mr. Rodent!Yes, we hams, need something like this. Making one transistor transmitter used to be easy with Crystals. Now it's not, unless use of something like this.Again, thanks!

author: tkamiya
author_rank: Super Contributor
timestamp: September 18, 2018, 10:55:06 pm
content: By now, someone must be rolling his/her eyes, why I don't do "google". I am having a bit of problem making that a difficult task. So, I appreciate everyone playing along with me.