Re: [time-nuts] Bye-Bye Crystals

Hi If your application is happy with 0.1% accuracy, you use a simple crystal that costs < 10 cents. If your application requires <0.001% accuracy, you probably are better off using a packaged oscillator. Bob > On Mar 13, 2017, at 8:11 PM, Hal Murray wrote: > > >

Re: [time-nuts] Bye-Bye Crystals

Hi If you are not to picky, you can buy crystals in bulk for < 5 cents each. Why make them from scratch? Best guess is that in small volume, they will cost you > $20 each to make. Labor cost something …. Bob > On Mar 13, 2017, at 9:09 PM, Adrian Godwin wrote: > > I'm

Re: [time-nuts] Bye-Bye Crystals

Hi …. ummm …… errr ….. 10 MHz sweet spot is a fiction. Roughly speaking the Q of a crystal is inversely proportional to the frequency. Drop the frequency 2:1 and the Q doubles. That assumes you don’t run into size constraints. If your package is a bit larger, the sweet spot is 2.5 MHz. If

Re: [time-nuts] Bye-Bye Crystals

I'm not after quality - I do have an application in mind but it doesn't need to compete with mass production. Just wondering if it's feasible to make something crude that will resonate. On 14 Mar 2017 1:00 a.m., "Hal Murray" wrote: jim...@earthlink.net said: > what

Re: [time-nuts] Bye-Bye Crystals

On Mon, 13 Mar 2017 15:01:39 +, you wrote: >What minimal equipment would you need to make your own crystals ? There was a WWII era "how they spend your war bonds" film that showed the process pretty well. Diamond saws to cut the raw quartz, X-ray diffraction to find the proper axes prior to

Re: [time-nuts] Bye-Bye Crystals

Making a finished crystal, especially a high-Q one of a target frequency far removed from the 8-10 Mhz sweet spot, is definitely one of those projects that is a lot harder than you would think it is. I was down at ICM a few years back when we were building some high-Q 70 Mhz VHF crystals for a

Re: [time-nuts] Bye-Bye Crystals

jim...@earthlink.net said: > what about cheap crystals for microcontrollers.. I think the Arduino, for > instance, uses a crystal (and the oscillator electronics are inside the > Atmel part) I assume you can save a few pennies if you use a raw crystal rather than an oscillator. That

Re: [time-nuts] Bye-Bye Crystals

Hi > On Mar 13, 2017, at 7:12 PM, jimlux wrote: > > On 3/13/17 3:19 PM, Bob Camp wrote: >> Hi >> >> …. ummm …. errr … Add to that: >> >> X-ray gear to work out the orientation of the (possibly natural) bar you are >> sawing >> Lapping gear to get the blanks flat (as

Re: [time-nuts] Bye-Bye Crystals

On 3/13/17 2:59 PM, Alan Melia wrote: .and some micro-soldering kit to attach the plated unit to the lead frame. Our factory used homemade hot air jets, I have no idea what the solder was prob LMP. Lapping a single blank is difficult, one tends to get rounded edges(even with the best

Re: [time-nuts] Bye-Bye Crystals

On 3/13/17 3:19 PM, Bob Camp wrote: Hi …. ummm …. errr … Add to that: X-ray gear to work out the orientation of the (possibly natural) bar you are sawing Lapping gear to get the blanks flat (as optically flat) Automated / sorting X-ray gear to figure out what’s what after they are lapped

Re: [time-nuts] Bye-Bye Crystals

On Mon, Mar 13, 2017 at 6:05 PM, Jim Harman wrote: > Some of the Arduino boards, the Leonardo for example, use ceramic > resonators, Sorry, the Leonardo does have a crystal. The original Uno had a resonator. -- --Jim Harman

Re: [time-nuts] Bye-Bye Crystals

actually the process started as Statek started to etch the crystals http://www.statek.com/corporateoverview.php in 1970, and produces high quality crystal since than. 73 Alex KJ6UHN On 3/13/2017 11:05 AM, Richard Solomon wrote: I don't think it's as much the manufacturing process as it is

Re: [time-nuts] Bye-Bye Crystals

Hi …. ummm …. errr … Add to that: X-ray gear to work out the orientation of the (possibly natural) bar you are sawing Lapping gear to get the blanks flat (as optically flat) Automated / sorting X-ray gear to figure out what’s what after they are lapped Rounding equipment to turn the square

Re: [time-nuts] Bye-Bye Crystals

On Mon, Mar 13, 2017 at 4:53 PM, jimlux wrote: > I think the Arduino, for instance, uses a crystal (and the oscillator > electronics are inside the Atmel part) You're right. Some of the Arduino boards, the Leonardo for example, use ceramic resonators, which make them

Re: [time-nuts] Bye-Bye Crystals

.and some micro-soldering kit to attach the plated unit to the lead frame. Our factory used homemade hot air jets, I have no idea what the solder was prob LMP. Lapping a single blank is difficult, one tends to get rounded edges(even with the best machine) which affect the activity. See

Re: [time-nuts] Bye-Bye Crystals

On 3/13/17 11:29 AM, Tim Shoppa wrote: With a chunk of raw crystal material and a lapidary saw, blanks can be cut. Typical FT-243/U crystal construction technology up through the 1950's:

Re: [time-nuts] Bye-Bye Crystals

actually the process started as Statek started to etch the crystals http://www.statek.com/corporateoverview.php in 1970 and produces high quality crystal since than 73 KJ6UHN On 3/13/2017 11:05 AM, Richard Solomon wrote: I don't think it's as much the manufacturing process as it is

Re: [time-nuts] Early 5065A

Pete, Those are very nice pictures and I always appreciate detail ones. Those caps are ugly but easily replaced and not to much damage that I could see. Now with Corby's insights your in even better shape to revive the unit. Best of luck. Paul WB8TSL On Mon, Mar 13, 2017 at 2:30 PM,

Re: [time-nuts] Bye-Bye Crystals

On 3/13/17 10:09 AM, Richard (Rick) Karlquist wrote: A complete oscillator consists of the crystal integrated with the electronics. A loose crystal is just a resonator, and the buyer has to supply his own electronics. You rarely see the latter any more in applications other than oven

Re: [time-nuts] Bye-Bye Crystals

On 3/13/17 8:01 AM, Adrian Godwin wrote: The article mentions that the business started in his father's garage. What minimal equipment would you need to make your own crystals ? Lapping compound and a hunk of glass/polished granite? You can probably buy blanks that are approximately the right

Re: [time-nuts] Bye-Bye Crystals

On Mon, 13 Mar 2017 15:01:39 + Adrian Godwin wrote: > What minimal equipment would you need to make your own crystals ? The equipment is quite minimal: * A diamond precision saw to cut the crystals * Some tool to check the accuracy of the cut (orientation and thicknes)

Re: [time-nuts] Bye-Bye Crystals

I work for a company that builds electronics products, low volume, highly complex units. It used to be that you bought a crystal and then made an oscillator that would use that crystal. Or you had a single chip micro that used a crystal for the time base, in the early days you might have to

Re: [time-nuts] Bye-Bye Crystals

With a chunk of raw crystal material and a lapidary saw, blanks can be cut. Typical FT-243/U crystal construction technology up through the 1950's: http://www.rfcafe.com/references/popular-electronics/after-class-Quartz-Crystals-january-1957-popular-electronics.htm It was very common for hams

Re: [time-nuts] Bye-Bye Crystals

I don't think it's as much the manufacturing process as it is procuring the raw material. 73, Dick, W1KSZ Sent from Outlook From: time-nuts on behalf of Adrian Godwin Sent: Monday,

[time-nuts] Early 5065A

Pete, That is a VERY early unit. Those early ones did not have the TED device. I have only seen one unit with an earlier SN! Ohm the lamp oven windings to the threaded post protruding from the end of the optical unit. (should be open) Also check across the oven winding (50 Ohm) If the

Re: [time-nuts] Bye-Bye Crystals

A complete oscillator consists of the crystal integrated with the electronics. A loose crystal is just a resonator, and the buyer has to supply his own electronics. You rarely see the latter any more in applications other than oven oscillators. The same thing happened in SAW resonators.

Re: [time-nuts] Bye-Bye Crystals

The article mentions that the business started in his father's garage. What minimal equipment would you need to make your own crystals ? On Mon, Mar 13, 2017 at 2:11 PM, Van Horn, David < david.vanh...@backcountryaccess.com> wrote: > > Probably true for many things. My current design has six

Re: [time-nuts] Bye-Bye Crystals

Probably true for many things. My current design has six crystals, and exactly none of them could be replaced by an oscillator module. Power and space considerations mostly. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

Re: [time-nuts] Bye-Bye Crystals

Hi There also was an intermediate phase between channel frequency -> crystal frequency -> you buy a crystal and synthesizers. My early fun and games at Motorola involved designing TCXO’s and OCXO’s that had non-replicable crystals in them. We shipped them as a fully sealed unit. The

Re: [time-nuts] Bye-Bye Crystals

sorry, what do you mean by "complete oscillator" have outnumbered loose crystals? -=Bryan=- From: time-nuts on behalf of Richard (Rick) Karlquist Sent: March 12, 2017 4:38 PM To: Discussion of precise time

Re: [time-nuts] Early 5065A

Hi Pete, very nice condition for this early unit, It show low usage . You have a problem on oven controller, I suggest you to verify the heather coils, the power transistors and the oven controler board. Luciano timeok www.timeok.it Da "time-nuts"