40+ years ago got my first crystal, FT-243 at 3523 kHz made by JAN... Brought many many hours of fun! Wish I could bring back the excitement of each new QSO! Dang, I'm getting old :) 73 Lasse SM5GLC 30 april 2015, wesw7zoi@gmail.com [emrfd] skrev: Hi all,
A recent post suggested that JAN crystals was still going. But their web site had nothing more than an email address. I wrote and got a reply from Monique Whan stating that they no longer manufacture crystals. She then suggested we contact International.
Nothing stays the same.... Perhaps we will have to try either India or Germany.
73, Wes w7zoi
|
Hello Wes, Thanks for doing the obvious thing and contacting them :-) There's nothing like real information. Sorry to hear that JAN is out of business - there were my go-to for 20 years, though I admit I have not ordered from them in 15 years. 73, Dana K6JQ
| 11031
| 2015-04-30 12:06:34
| cwfingertalker
| Re: JAN Crystals
|
Hello to the Group,
International Crystal is the only crystal manufacturer I found that was willing to make crystals for ham projects. However they charge a pretty penny for crystals. I explored buying crystals for an HF converter project. The price of the crystals scaled down that project. The avenue I am choosing in the future is to use a "crystal replacement" DDS oscillator. I found that solution to be a more econcomical pathway.
Bill N7EU |
| 11033
| 2015-04-30 12:27:06
| Garey Barrell
| Re: JAN Crystals
|
I guess I don't understand why we would look in 'India or Germany' when we have a perfectly good, ham family owned manufacturer right here in the USA!!! If you need a GOOD crystal, go to International Crystal Manufacturers. Your crystal
will arrive on time, (or sooner,) be ON frequency, and have a lifetime guarantee. I have ICM
crystals that are 40+ years old that are still working just fine, and well within reasonable
(better) aging limits.
If you need a hundred 'computer grade' crystals to select for a filter, yeah then eBay makes sense.
As they say about oats, it's all about the grade you want. If you don't care if they've already
been through the horse, they get real cheap! :-)
73, Garey - K4OAH
Rome, GA
Drake 2-B, 2-C/2-NT, 4-A, 4-B, C-Line
and TR-4/C Service Supplement CDs
wesw7zoi@gmail.com [emrfd] wrote:
>
>
> Hi all,
>
>
> A recent post suggested that JAN crystals was still going. But their web site had nothing
> more than an email address. I wrote and got a reply from Monique Whan stating that they no
> longer manufacture crystals. She then suggested we contact International.
>
>
> Nothing stays the same.... Perhaps we will have to try either India or Germany.
>
>
> 73, Wes
>
> w7zoi
>
> |
| 11034
| 2015-04-30 13:09:36
| Dana Myers
| DDS vs SiLabs PLLs (was Re: [emrfd] Re: JAN Crystals)
|
| 11035
| 2015-04-30 13:21:28
| David J Nushardt
| Re: DDS vs SiLabs PLLs (was Re: [emrfd] Re: JAN Crystals)
|
Hi, I would be interested in the Ad 9850 modules , if you still have them, and be happy to pay the postage.73's
Dave
N9ooq
| 11036
| 2015-04-30 13:25:32
| Dana Myers
| Re: DDS vs SiLabs PLLs (was Re: [emrfd] Re: JAN Crystals)
|
| 11037
| 2015-04-30 17:37:41
| billw77aaz
| Re: JAN Crystals
|
Crystek is alive and well. They make low phase noise crystal oscillators, UHF VCOs, voltage-tweekable xtal oscillators at 1 GHz. I do not think they make individual crystals. A book on crystal oscillators written by their Chief Engineer was released recently. W7AAZ > There was a company called Crystek that was supposedly across the street
> from JAN, but I never had a chance to deal with them.
> 73,
> Conard, WS4S
> |
| 11038
| 2015-04-30 17:51:55
| Russell Shaw
| Re: JAN Crystals
|
| 11039
| 2015-04-30 17:58:00
| billw77aaz
| Re: JAN Crystals
|
Same here Lasse, except it was 7154 KHz and 57 years ago. W7AAZ > 40+ years ago got my first crystal, FT-243 at 3523 kHz made by JAN...
> Brought many many hours of fun!
> Wish I could bring back the excitement of each new QSO!
>
> Dang, I'm getting old :)
>
> 73
> Lasse SM5GLC |
| 11040
| 2015-04-30 20:03:35
| augustinetez
| Re: DDS vs SiLabs PLLs (was Re: [emrfd] Re: JAN Crystals)
|
I did a project for Pic-a-Star rigs using an Si5351 to replace the 10.710MHz xtal as many were finding it hard to get xtals at a reasonable price. You can see it here (pcb is 20 x 30 mm):
This was used to produce one frequency. At the request of a ham from Italy, I have done a modified version that will allow up to 16 switched frequencies which can be changed on the fly. This one is here (bottom quarter of the page):
One point to note about the Si5351, is that all the output drivers share a common power rail and there is crosstalk between outputs. It will introduce unwanted products into the signal chain.
Terry VK5TM
|
| 11041
| 2015-04-30 20:15:40
| Dana Myers
| Re: DDS vs SiLabs PLLs (was Re: [emrfd] Re: JAN Crystals)
|
| 11042
| 2015-04-30 20:35:30
| Ashhar Farhan
| Re: DDS vs SiLabs PLLs (was Re: [emrfd] Re: JAN Crystals)
|
The Si570 and the Si5351 can never match up the phase noise of a well designed, simple crystal oscillator. Though a number of 'high end' rigs are using these as the local oscillators, for the best clarity in your receiver, nothing beats a free running oscillator at my shack. I am saying this as someone who has routinely applied Si570 everywhere (I have a bag of 25 of them). The Si570 LVDS version is much better (and costlier). The Si5351 is cheap and modest in terms of phase noise. I have a crystal notch filter in the works. I will post the noise figures soon. The Si5351 boards use the cheap 27 or 25 MHz microprocessor crystals as reference. One shouldn't expect very good performance from them unless an outboard, low noise crystal oscillator is used to drive them. The cross talk between the three channels is substantial (a quick scan on the specan showed this). They are best used a a single frequency devices. - f | | | | | | |