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Quote from: beanflying on March 28, 2021, 01:09:41 amA very complete one for the AVO nuts out there too. eBay auction: #233944670135 $15 AUD post to me and on shipping at cost ENABLING available to non locals This is starting to lose its appeal - even with no shipping and a cupful of fuel.Four days to go and we have two bidders bouncing back and forth a couple of times. Bound to be more bouncing ... and then there's the sniper unknown.Anyone want to take a punt at the final price?
A very complete one for the AVO nuts out there too. eBay auction: #233944670135 $15 AUD post to me and on shipping at cost ENABLING available to non locals
Ah.... We're back!That was a long few days.Unfortunately, SWMBO noticed my lack of focus and I fell into a strange world activity which I had not experienced for such an extended period of time. Damn I got a lot of stuff done around the house!I fear this may have repercussions....
Quote from: Brumby on April 02, 2021, 11:17:41 amQuote from: beanflying on March 28, 2021, 01:09:41 amA very complete one for the AVO nuts out there too. eBay auction: #233944670135 $15 AUD post to me and on shipping at cost ENABLING available to non locals This is starting to lose its appeal - even with no shipping and a cupful of fuel.Four days to go and we have two bidders bouncing back and forth a couple of times. Bound to be more bouncing ... and then there's the sniper unknown.Anyone want to take a punt at the final price?$134.50 Aussie pesos. Way more than I would have thrown at it.
Quote from: Robert763 on April 08, 2021, 07:03:26 amWhat was I saying about using "the cloud" for everthing last week....The cloud would have survived this. This would have been an "availability zone failure" which is easy to architect around. In fact I spent a week about 2 weeks ago actually just pulling plugs metaphorically speaking with no side effects at this level.What happened here is "lowest bidding hoster had a massive shit show" not "the cloud".And just remember that the guys running the "lowest bidding hoster" know more than the average person.Your stuff is safer in the cloud. If you do it properly.And the data security argument is void. What you post on a public forum is public. What you post in a private S3 bucket in AWS is not.Edit: I notice the forum is running like shit now as well. Another problem easily resolved by upping the instance size transparently rather than buying another physical machine
What was I saying about using "the cloud" for everthing last week....
Quote from: McBryce on April 08, 2021, 11:05:56 amAh, ok. I've (the company I worked for) already had massive problems that cost millions due to lost cloud data.I've read about 50 case studies where that happens and it's always someone doing something stupid, a low ball provider, or PaaS, or Atlassian IaaS cloud = win.
Ah, ok. I've (the company I worked for) already had massive problems that cost millions due to lost cloud data.
Talking of OXCO's I've been putting one of my HP 10811Ds into a case and fired it up for the first time on Tuesday. Frequency was fine with No EFC and the mechanical trimmer untouched since it was removed ftom a 8922 cell test set abou 4 years ago and has been in a storae container for at least a couple of years the error to GPS was 0.052Hz. Overall I'm pretty pleased. I made one difficult decision to use a DC-DC converter so it can run off mains or 9-18V DC. I'm seeing a little bit of nise from the DC-DC on the output. It goes up with the oven current and appears to be short bursts of noise. It's good enough as a frequency reference but not to multiply up to microwavs frequencies. I'll have to do a bit of work and see if I can knock it down a bit further.
Just as when the microwave oven craps out and makes you acutely and painfully aware of how you rely on it, you don't realize how frequently you pop in here to take a quick look until popping in here no longer works. Good to see that the forum has returned - that was a long couple of days.-Pat
Quote from: Robert763 on April 08, 2021, 12:50:41 pmTalking of OXCO's I've been putting one of my HP 10811Ds into a case and fired it up for the first time on Tuesday. Frequency was fine with No EFC and the mechanical trimmer untouched since it was removed ftom a 8922 cell test set abou 4 years ago and has been in a storae container for at least a couple of years the error to GPS was 0.052Hz. Overall I'm pretty pleased. I made one difficult decision to use a DC-DC converter so it can run off mains or 9-18V DC. I'm seeing a little bit of nise from the DC-DC on the output. It goes up with the oven current and appears to be short bursts of noise. It's good enough as a frequency reference but not to multiply up to microwavs frequencies. I'll have to do a bit of work and see if I can knock it down a bit further.Aye, there's the rub. Now I'm mucking about with building frequency standards I'm beginning to feel I need an SA. Woe is me, it just looks like I'll have to start looking for one.
Talking of OXCO's I've been putting one of my HP 10811Ds into a case and fired it up for the first time on Tuesday. Frequency was fine with No EFC and the mechanical trimmer untouched since it was removed ftom a 8922 cell test set abou 4 years ago and has been in a storae container for at least a couple of years the error to GPS was 0.052Hz. Overall I'm pretty pleased. I made one difficult decision to use a DC-DC converter so it can run off mains or 9-18V DC. I'm seeing a little bit of nise from the DC-DC on the output. It goes up with the oven current and appears to be short bursts of noise.
Quote from: mnementh on April 04, 2021, 07:02:24 pmQuote from: McBryce on April 04, 2021, 05:25:26 pmQuote from: mnementh on April 04, 2021, 04:34:57 pmQuote from: bd139 on April 04, 2021, 12:07:54 pmDefinitely worked out better than doing spreadsheets. You can see your neighbors; they're too fucking close. mnemcurrent mood: dickwiseI suppose Canadians aren't used being able to see their neighbours, even if they and their neighbours are standing on the roof of their houses. McBryce.P.s. AND STOP MAKING ME WANT TO BUY A CASIO EDIFICE!!LOL... I've been this way since long before I ran away to Canuckistan... I inherited that attitude from my grandparents. mnemEevblog down... nothing to repair... Yeah, I went and bought a Casio Edifice. McBryce.
Quote from: McBryce on April 04, 2021, 05:25:26 pmQuote from: mnementh on April 04, 2021, 04:34:57 pmQuote from: bd139 on April 04, 2021, 12:07:54 pmDefinitely worked out better than doing spreadsheets. You can see your neighbors; they're too fucking close. mnemcurrent mood: dickwiseI suppose Canadians aren't used being able to see their neighbours, even if they and their neighbours are standing on the roof of their houses. McBryce.P.s. AND STOP MAKING ME WANT TO BUY A CASIO EDIFICE!!LOL... I've been this way since long before I ran away to Canuckistan... I inherited that attitude from my grandparents. mnem
Quote from: mnementh on April 04, 2021, 04:34:57 pmQuote from: bd139 on April 04, 2021, 12:07:54 pmDefinitely worked out better than doing spreadsheets. You can see your neighbors; they're too fucking close. mnemcurrent mood: dickwiseI suppose Canadians aren't used being able to see their neighbours, even if they and their neighbours are standing on the roof of their houses. McBryce.P.s. AND STOP MAKING ME WANT TO BUY A CASIO EDIFICE!!
Quote from: bd139 on April 04, 2021, 12:07:54 pmDefinitely worked out better than doing spreadsheets. You can see your neighbors; they're too fucking close. mnemcurrent mood: dickwise
Definitely worked out better than doing spreadsheets.
The black soldermask looks OK. How about a shot with grazing light (i.e. trying to catch a reflection of the light source in the soldermask) so's we can all get a proper feel for it? Pretty please?
Quote from: AVGresponding on April 08, 2021, 09:14:19 amQuote from: mnementh on April 08, 2021, 04:04:00 amQuote from: Vince on April 04, 2021, 09:34:06 pmQuote from: mnementh on April 04, 2021, 09:26:31 pmIs this enough fine control of wattage...? They make these for putting lots of cheap LED floodlights in the garage; I've used one with appliance bulbs to fine-adjust max current on my dim-bulb tester. Costs $10-15 on Amazon: https://www.amazon.com/s?k=bulb+splitter+7+in+1Interesting ! However no it still does not cut it. It makes it more practical to adapt the wattage to the DUT, but still is an on/off safety device. I was talking about fine control as far as ramping up the voltage slowly. A dim bulb tester is no help for this, no matter how fancy one makes it.Yeah, I'd still want one of these inline with a variac, myself. A lot of the time you'll find that once things start turning on in a SMPS, especially the older designs, that's when a short appears. The scariac doesn't stop the magic smoke from coming out then, but rather encourages the switcher transistor to try and sink more current to make up for the lower voltage.mnem I don't think I'd try to soft start an SMPS with a variac; an SMPS is a constant power device, it'll just draw more current at lower voltages...Once it's up and running, yes. But most of the inrush current at start-up is charging the DC rail capacitor(s), that is going to be voltage dependant (a simple lumped component model would be an RC circuit and some diodes). Somewhere there's a crossover point where the steady state current exceeds the inrush current. It's all theoretical though, because for most off-line SMPS the minimum voltage that it will start up at is going to be pretty close to the rated minimum input voltage. If you've got an off-line SMPS rated for 90-265 V rms input the wiggle room at the bottom end is going to be pretty small because at some point you'll hit the duty cycle limit of the buck regulator - despite the usage of every bloody sports commentator and every overblown drill sergeant in the world, you can't "give it 200%".
Quote from: mnementh on April 08, 2021, 04:04:00 amQuote from: Vince on April 04, 2021, 09:34:06 pmQuote from: mnementh on April 04, 2021, 09:26:31 pmIs this enough fine control of wattage...? They make these for putting lots of cheap LED floodlights in the garage; I've used one with appliance bulbs to fine-adjust max current on my dim-bulb tester. Costs $10-15 on Amazon: https://www.amazon.com/s?k=bulb+splitter+7+in+1Interesting ! However no it still does not cut it. It makes it more practical to adapt the wattage to the DUT, but still is an on/off safety device. I was talking about fine control as far as ramping up the voltage slowly. A dim bulb tester is no help for this, no matter how fancy one makes it.Yeah, I'd still want one of these inline with a variac, myself. A lot of the time you'll find that once things start turning on in a SMPS, especially the older designs, that's when a short appears. The scariac doesn't stop the magic smoke from coming out then, but rather encourages the switcher transistor to try and sink more current to make up for the lower voltage.mnem I don't think I'd try to soft start an SMPS with a variac; an SMPS is a constant power device, it'll just draw more current at lower voltages...
Quote from: Vince on April 04, 2021, 09:34:06 pmQuote from: mnementh on April 04, 2021, 09:26:31 pmIs this enough fine control of wattage...? They make these for putting lots of cheap LED floodlights in the garage; I've used one with appliance bulbs to fine-adjust max current on my dim-bulb tester. Costs $10-15 on Amazon: https://www.amazon.com/s?k=bulb+splitter+7+in+1Interesting ! However no it still does not cut it. It makes it more practical to adapt the wattage to the DUT, but still is an on/off safety device. I was talking about fine control as far as ramping up the voltage slowly. A dim bulb tester is no help for this, no matter how fancy one makes it.Yeah, I'd still want one of these inline with a variac, myself. A lot of the time you'll find that once things start turning on in a SMPS, especially the older designs, that's when a short appears. The scariac doesn't stop the magic smoke from coming out then, but rather encourages the switcher transistor to try and sink more current to make up for the lower voltage.mnem
Quote from: mnementh on April 04, 2021, 09:26:31 pmIs this enough fine control of wattage...? They make these for putting lots of cheap LED floodlights in the garage; I've used one with appliance bulbs to fine-adjust max current on my dim-bulb tester. Costs $10-15 on Amazon: https://www.amazon.com/s?k=bulb+splitter+7+in+1Interesting ! However no it still does not cut it. It makes it more practical to adapt the wattage to the DUT, but still is an on/off safety device. I was talking about fine control as far as ramping up the voltage slowly. A dim bulb tester is no help for this, no matter how fancy one makes it.
Is this enough fine control of wattage...? They make these for putting lots of cheap LED floodlights in the garage; I've used one with appliance bulbs to fine-adjust max current on my dim-bulb tester. Costs $10-15 on Amazon: https://www.amazon.com/s?k=bulb+splitter+7+in+1
Quote from: Cerebus on April 08, 2021, 11:37:22 amQuote from: bd139 on April 08, 2021, 10:47:13 amAnd the data security argument is void. What you post on a public forum is public. What you post in a private S3 bucket in AWS is not.Unless you you leave your S3 bucket credentials on Github. You've probably done something wrong if that matters ...1. Your access credentials shouldn't survive long enough for that to be an issue (temporary creds always)2. IAM role should have a trust policy saying where you can access the bucket from (least priv)3. Your account shouldn't have the ability to do that anyway or make the bucket public (least priv)4. Require MFA for console access so if you lose your login, meh (mfa)5. Actually look at the complaining Trusted Advisor does (audit/analyse)If you skipped all that then it's your own fecking fault
Quote from: bd139 on April 08, 2021, 10:47:13 amAnd the data security argument is void. What you post on a public forum is public. What you post in a private S3 bucket in AWS is not.Unless you you leave your S3 bucket credentials on Github.
And the data security argument is void. What you post on a public forum is public. What you post in a private S3 bucket in AWS is not.
Quote from: Robert763 on April 08, 2021, 07:03:26 amWhat was I saying about using "the cloud" for everthing last week....The cloud would have survived this. This would have been an "availability zone failure" which is easy to architect around. In fact I spent a week about 2 weeks ago actually just pulling plugs metaphorically speaking with no side effects at this level. What happened here is "lowest bidding hoster had a massive shit show" not "the cloud". And just remember that the guys running the "lowest bidding hoster" know more than the average person.Your stuff is safer in the cloud. If you do it properly. And the data security argument is void. What you post on a public forum is public. What you post in a private S3 bucket in AWS is not.Edit: I notice the forum is running like shit now as well. Another problem easily resolved by upping the instance size transparently rather than buying another physical machine
Not that you NEED another scope eBay auction: #154405003584
Now, what was I saying before I was interrupted by someone sneeking off behind the generator shack for a quick fag? Oh yes, OCXOs.So, my batch from what turned into a distributed group purchase took 9 days door to door. Ordered two and like BD, got twice as many for my money. Desoldering turned out to be relatively easy for a part on a 10 layer board - just desoldered each pin with Chem-Wik (that stuff's good) and went around the board with a small screwdriver for a lever and gave each pin a lift while heating it with the old Metcal. No application of 60/40, chip-qwik or anything similar needed. All four survived the ordeal of having the board next to them violently cut and being desoldered. Here's how they all performed: Sorry for the laziness of a screenshot, but converting to SMF's table notation is too much of a fag. Readings taken with my TTi TF930 that was last adjusted against GPS a year ago. All with enough range left to be steerable to 10.000 000 00 MHz at an appropriate EFC voltage with room to spare for future ageing (i.e. GPSDO fodder). None good enough to be used "out of the box" as a 10 MHz reference without trimming, unless you were more interested in stability than accuracy. I tried a few random selections for stability, using another known good uncalibrated 10 MHz OCXO as reference input to the TF930, and they stayed stable at the limit of the counter's resolution (10 mHz or 1 ppb) for as long as I was prepared to wait - several hours in one case.Conclusion: £13.90 well spent.
Quote from: Robert763 on April 08, 2021, 12:50:41 pmTalking of OXCO's I've been putting one of my HP 10811Ds into a case and fired it up for the first time on Tuesday. Frequency was fine with No EFC and the mechanical trimmer untouched since it was removed ftom a 8922 cell test set abou 4 years ago and has been in a storae container for at least a couple of years the error to GPS was 0.052Hz. Overall I'm pretty pleased. I made one difficult decision to use a DC-DC converter so it can run off mains or 9-18V DC. I'm seeing a little bit of nise from the DC-DC on the output. It goes up with the oven current and appears to be short bursts of noise.I went overboard with mine: capacitance multiplier, 723 regulator (since the diode is low noise), and ferrites/caps. I may be able to provide a screenshot later
Ah.... We're back! That was a long few days. Unfortunately, SWMBO noticed my lack of focus and I fell into a strange world activity which I had not experienced for such an extended period of time. Damn I got a lot of stuff done around the house! I fear this may have repercussions....
Quote from: bd139 on April 08, 2021, 11:07:46 amQuote from: McBryce on April 08, 2021, 11:05:56 amAh, ok. I've (the company I worked for) already had massive problems that cost millions due to lost cloud data.I've read about 50 case studies where that happens and it's always someone doing something stupid, a low ball provider, or PaaS, or Atlassian IaaS cloud = win.I second that. IaaS == you are free to move elsewhere and change provider.