- Source for 784 MHz crystals? - 7 Updates
- Faulty SMPSU. - 1 Update
| "Peter W." <peterwieck33@gmail.com>: May 21 10:50AM -0700 Just to help out - here are one-off suppliers of crystals active today: http://www.quartslab.com/ (England) https://www.euroquartz.co.uk/ (England) https://www.laptech.com/index.php (Canada) http://lokoselectronics.com/brands/anderson-electronics-llc/ (USA) https://www.frequencymanagement.com/ (USA) https://www.transko.com/ (Possible - USA) https://abracon.com/brands/fox?utm_source=foxonline.com&utm_medium=301 (USA) http://bomarcrystal.com/ (USA) https://www.ctscorp.com/ (Possible, USA) http://www.krystaly.cz/en/ (Czech Republic) I am sure with a bit more searching I could find some more. Peter Wieck Melrose Park, PA |
| Phil Allison <pallison49@gmail.com>: May 21 03:11PM -0700 Rob wrote: > (these companies work with stock crystals that they etch towards the > requested frequency so you can only order frequencies for which they > have the suitable starting point) ----------------------------------------------------------------------------- ** People here cannot *read posts* for the actual meaning !!!!! FYI: I posted my remark to the OP (John Crane) not the group. I told him that if he Googled his topic, many others have tried to source a suitable 784kHz crystal and found there simply is NO new part source. Likely never has been either. I also told him where to find used ones - in old HP-55s. He has no real need in any case - purely a whim. So he ain't about to pay a *whole bunch of money* for one. My advice was solid. ...... Phil |
| Clifford Heath <no.spam@please.net>: May 22 10:30AM +1000 On 22/5/21 12:47 am, Rob wrote: > However, I looked up a company where I have ordered before and it seems > that this particular frequency is a problem. They provide two ranges, > 30-100 kHz and another starting at 800 kHz. 30-100KHz will be a tuning fork. From 800MHz up will be a rock, ground smaller for higher frequencies. It's kinda difficult to grind them bigger though. Put an Si5351 and an ATTiny on a little board and it'll probably be smaller than your broken rock, and cost a fraction of the price. CH |
| Phil Allison <pallison49@gmail.com>: May 21 06:40PM -0700 Clifford Heath wrote: ================ > Put an Si5351 and an ATTiny on a little board and it'll probably be > smaller than your broken rock, and cost a fraction of the price. ** The OP needs an actual crystal. The mod he wants uses the existing circuit by replacing an RC network directly. The Si part use a lot of current for a battery operated device, about 35mA. .... Phil |
| Rob <nomail@example.com>: May 22 10:08AM > ** People here cannot *read posts* for the actual meaning !!!!! > FYI: > I posted my remark to the OP (John Crane) not the group. There is no need to be that offensive, Phil. This is usenet, threads have a tree structure where people reply to replies and not direct to the original posting. When you cannot handle that, you should not be here. |
| Phil Allison <pallison49@gmail.com>: May 22 04:43AM -0700 Rob wrote: ========= > > FYI: > > I posted my remark to the OP (John Crane) not the group. > There is no need to be that offensive, Phil. ** FFS did you *fucking* read the vile shit that was posted about me by the resident moronic assholes here ???? Are you totally BLIND !!!!!! > This is usenet, threads have a tree structure where people reply to > replies and not direct to the original posting. ** FYI I have posting on usenet for over 20 years - so I damn well know the rules. My comment was to *one* person, hoping he would reply in order to explain himself. Which he has not - as I expected. > When you cannot handle that, ** Get a grip on yourself pal. ...... Phil |
| "Peter W." <peterwieck33@gmail.com>: May 22 08:03AM -0700 > ** FYI I have posting on usenet for over 20 years - so I damn well know the rules. And you are eternally glad that you are hiding behind a keyboard - as you would never behave as you do around people. Peter Wieck Melrose Park, PA |
| T i m <news@spaced.me.uk>: May 22 10:30AM +0100 On Mon, 17 May 2021 15:43:12 -0700 (PDT), whit3rd <whit3rd@gmail.com> wrote: <snip> >That's the likely culprit, probably will need to be desoldered to find the part >number, and will be easy-ish to test. Sometimes there's two diodes, center >pin common, in this form factor. Coming back to this before buying / replacing the switcher, I tested it out of circuit on my DMM (diode test, all ways etc) and it seemed to check out ok? Whilst rummaging though my spares last night I came across a similar looking device (with the two diodes facing the centre pin marked on the case) so assuming the spec checks out similar (at least 12V etc), should I try swapping that in and see what happens, in case the other is breaking down in use? FWIW I measure about 10V DC on the output (no load) and only about .5V on the AC range (ripple / noise)? Cheers, T i m |
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