Am 01.10.20 um 17:39 schrieb Joerg:> On 10/1/20 7:45 AM, Three Jeeps wrote: >> On Thursday, October 1, 2020 at 1:09:03 AM UTC-4, Joerg wrote: >>> On 9/30/20 8:46 PM, jla...@highlandsniptechnology.com wrote: >>>> >>>> In the last week, I've been burned 6 times, shocked once, punctured >>>> (with blood) twice, and had to eat a single burger for three lunches >>>> in a row. And we are out of ice cream sandwiches. >>>> >>> Could be worse. BE-256 yeast is out of stock everywhere for months and I >>> can't brew Belgian abbaye ales. That's serious! >>> >>> :-) >>> >>> -- >>> Regards, Joerg >>> >>> http://www.analogconsultants.com/ >> https://homebrewsupply.com/fermentis-safbrew-be-256-yeast/ >> > > Nine bucks, yikes! Oh well, goes like ammo I guess. A poster in the brew > NG pointed out another place but I found that their BE-256 yeast was > quite old. > > Somehow production of this stuff must have stopped. >First google result: < https://www.hobbybrauerversand.de/Safale-BE-256-Abbaye-obergaerige-Trockenhefe-115-g > cheers, Gerhard
dangerous profession
Started by ●October 1, 2020
Reply by ●October 1, 20202020-10-01
Reply by ●October 1, 20202020-10-01
On Thu, 1 Oct 2020 08:42:40 -0700, Joerg <news@analogconsultants.com> wrote:>On 10/1/20 8:06 AM, jlarkin@highlandsniptechnology.com wrote: >> On Wed, 30 Sep 2020 22:08:54 -0700, Joerg <news@analogconsultants.com> >> wrote: >> >>> On 9/30/20 8:46 PM, jlarkin@highlandsniptechnology.com wrote: >>>> >>>> In the last week, I've been burned 6 times, shocked once, punctured >>>> (with blood) twice, and had to eat a single burger for three lunches >>>> in a row. And we are out of ice cream sandwiches. >>>> >>> >>> Could be worse. BE-256 yeast is out of stock everywhere for months and I >>> can't brew Belgian abbaye ales. That's serious! >>> >>> :-) >> >> Poor baby! That's terrible. >> >> The ice cream sandwich shortage is at least as bad. You can apply one >> directly to a burn, or eat it, and either way you feel better. >> >> I'm tuning the tempco of my Colpitts oscillator, which is tucked into >> the corner of a tallish enclosure, so it's really hard to replace 0603 >> parts; many Metcal burns. Through a modest amount of genius and a lot >> of experimenting and dumb luck, I've got the f/t curve parabolic with >> the flat at 40c, and maybe 35 ppm p-p over my operating range. I can >> tolerate +-500 before my PLL breaks. >> >> Spice only helped a little. As Mike E says, the real value of Spice >> isn't to prove anything, it's to train your instincts. >> >> Part of the compensation is, basically, an FR4 capacitor, which has a >> strong positive cap TC. The issue will be, can I get this sort of >> tempco in production? >> >> I want very constant sine wave amplitude, beginning with the first >> oscillation cycle. Holding that amplitude turned out to be tricky and >> of course tangled with the tempco issue. >> > >In production an FR4 cap can get iffy. How about a little local heat >inside a regulator loop that keeps the temperature well above max >expected but constant? The heater could be a 1206 resistor.That's interesting. The uP knows the board temp, so it could PWM a resistor or so in the oscillator region, probably on the back side of the board. I'll include that on the next PCB rev. We already tweak the fan speed to try to keep the overall PCB temperature constant, which will help a lot. That will help other circuits on the board too. The box will self-heat about 35C or so, with the fan off. The fan algorithm is simple: 10 times a second, if the temp is below 40c, jog the fan voltage down. If above 40c, jog it up. The jogs are small and it powers up slow, so there is no acoustic drama. https://www.dropbox.com/s/uf15erm1nj3tjjk/Colpitts_125.JPG?raw=1 There are varicaps and things too. Everything affects the tempco. I can tune C4 to zap the 1st order term. Worst case, every batch of PCBs could have a different value of C4. Production would *not* like that. -- John Larkin Highland Technology, Inc Science teaches us to doubt. Claude Bernard
Reply by ●October 1, 20202020-10-01
Quick bit of first-aid for soldering iron burns: Keep a few fast-food ketchup packs in a nearby freezer. (They don't freeze solid). When you burn yourself, _quickly_ fetch a ketchup pack from the freezer and hold it on the burn until it runs out of cold -- several minutes. It's the right amount of cold for the right amount of time, and the squishy pack makes good contact with the burn. Don't knock it till you've tried it.
Reply by ●October 1, 20202020-10-01
On Thu, 1 Oct 2020 14:58:54 -0700 (PDT), Jim MacArthur <jimbmacarthur@gmail.com> wrote:>Quick bit of first-aid for soldering iron burns: >Keep a few fast-food ketchup packs in a nearby freezer. (They don't freeze solid). When you burn yourself, _quickly_ fetch a ketchup pack from the freezer and hold it on the burn until it runs out of cold -- several minutes. It's the right amount of cold for the right amount of time, and the squishy pack makes good contact with the burn. Don't knock it till you've tried it.I think I'll keep using ice cream sandwiches. Most of the burns are little swipes off the side of a Metcal tip, very hot but small. Just did another one. Sometimes I'm holding a bus wire or a resistor lead in place while it's being soldered, and I notice it's burning my finger. Best to endure the pain and get the joint right. Fingers eventually fix themselves.
Reply by ●October 1, 20202020-10-01
On 9/30/2020 11:46 PM, jlarkin@highlandsniptechnology.com wrote:> > In the last week, I've been burned 6 times, shocked once, punctured > (with blood) twice, and had to eat a single burger for three lunches > in a row. And we are out of ice cream sandwiches. > > >Is you trying to confirm whether you're immortal or something?
Reply by ●October 2, 20202020-10-02
On 10/1/20 3:09 PM, John Larkin wrote:> On Thu, 1 Oct 2020 14:58:54 -0700 (PDT), Jim MacArthur > <jimbmacarthur@gmail.com> wrote: > >> Quick bit of first-aid for soldering iron burns: >> Keep a few fast-food ketchup packs in a nearby freezer. (They don't freeze solid). When you burn yourself, _quickly_ fetch a ketchup pack from the freezer and hold it on the burn until it runs out of cold -- several minutes. It's the right amount of cold for the right amount of time, and the squishy pack makes good contact with the burn. Don't knock it till you've tried it. > > I think I'll keep using ice cream sandwiches. > > Most of the burns are little swipes off the side of a Metcal tip, very > hot but small. Just did another one. > > Sometimes I'm holding a bus wire or a resistor lead in place while > it's being soldered, and I notice it's burning my finger. Best to > endure the pain and get the joint right. Fingers eventually fix > themselves. >At one client they recommended Southern Comfort for just about anything. -- Regards, Joerg http://www.analogconsultants.com/
Reply by ●October 2, 20202020-10-02
On 10/1/20 9:17 AM, Gerhard Hoffmann wrote:> Am 01.10.20 um 17:39 schrieb Joerg: >> On 10/1/20 7:45 AM, Three Jeeps wrote: >>> On Thursday, October 1, 2020 at 1:09:03 AM UTC-4, Joerg wrote: >>>> On 9/30/20 8:46 PM, jla...@highlandsniptechnology.com wrote: >>>>> >>>>> In the last week, I've been burned 6 times, shocked once, punctured >>>>> (with blood) twice, and had to eat a single burger for three lunches >>>>> in a row. And we are out of ice cream sandwiches. >>>>> >>>> Could be worse. BE-256 yeast is out of stock everywhere for months >>>> and I >>>> can't brew Belgian abbaye ales. That's serious! >>>> >>>> :-) >>>> >>>> -- >>>> Regards, Joerg >>>> >>>> http://www.analogconsultants.com/ >>> https://homebrewsupply.com/fermentis-safbrew-be-256-yeast/ >>> >> >> Nine bucks, yikes! Oh well, goes like ammo I guess. A poster in the >> brew NG pointed out another place but I found that their BE-256 yeast >> was quite old. >> >> Somehow production of this stuff must have stopped. >> > > First google result: > > < > https://www.hobbybrauerversand.de/Safale-BE-256-Abbaye-obergaerige-Trockenhefe-115-g > > > > cheers, GerhardSorry, 1st attempt went via PM. Quote "Ihr Shop wurde installiert. Lesen Sie in unserem Guide mehr zu ersten Schritten mit JTL-Shop, der Grundkonfiguration und dem erstem Abgleich mit JTL-Wawi". Ahm ... Anyhow, there are also a few shops in the US that still have some but it's quite old, expiration date is too close. Yeast viability is a big thing with brewers and especially so when brewing a Belgian abbaye ale. -- Regards, Joerg http://www.analogconsultants.com/
Reply by ●October 2, 20202020-10-02
On 10/1/20 9:30 AM, jlarkin@highlandsniptechnology.com wrote:> On Thu, 1 Oct 2020 08:42:40 -0700, Joerg <news@analogconsultants.com> > wrote: > >> On 10/1/20 8:06 AM, jlarkin@highlandsniptechnology.com wrote: >>> On Wed, 30 Sep 2020 22:08:54 -0700, Joerg <news@analogconsultants.com> >>> wrote: >>> >>>> On 9/30/20 8:46 PM, jlarkin@highlandsniptechnology.com wrote: >>>>> >>>>> In the last week, I've been burned 6 times, shocked once, punctured >>>>> (with blood) twice, and had to eat a single burger for three lunches >>>>> in a row. And we are out of ice cream sandwiches. >>>>> >>>> >>>> Could be worse. BE-256 yeast is out of stock everywhere for months and I >>>> can't brew Belgian abbaye ales. That's serious! >>>> >>>> :-) >>> >>> Poor baby! That's terrible. >>> >>> The ice cream sandwich shortage is at least as bad. You can apply one >>> directly to a burn, or eat it, and either way you feel better. >>> >>> I'm tuning the tempco of my Colpitts oscillator, which is tucked into >>> the corner of a tallish enclosure, so it's really hard to replace 0603 >>> parts; many Metcal burns. Through a modest amount of genius and a lot >>> of experimenting and dumb luck, I've got the f/t curve parabolic with >>> the flat at 40c, and maybe 35 ppm p-p over my operating range. I can >>> tolerate +-500 before my PLL breaks. >>> >>> Spice only helped a little. As Mike E says, the real value of Spice >>> isn't to prove anything, it's to train your instincts. >>> >>> Part of the compensation is, basically, an FR4 capacitor, which has a >>> strong positive cap TC. The issue will be, can I get this sort of >>> tempco in production? >>> >>> I want very constant sine wave amplitude, beginning with the first >>> oscillation cycle. Holding that amplitude turned out to be tricky and >>> of course tangled with the tempco issue. >>> >> >> In production an FR4 cap can get iffy. How about a little local heat >> inside a regulator loop that keeps the temperature well above max >> expected but constant? The heater could be a 1206 resistor. > > That's interesting. The uP knows the board temp, so it could PWM a > resistor or so in the oscillator region, probably on the back side of > the board. I'll include that on the next PCB rev. > > We already tweak the fan speed to try to keep the overall PCB > temperature constant, which will help a lot. That will help other > circuits on the board too. The box will self-heat about 35C or so, > with the fan off. > > The fan algorithm is simple: 10 times a second, if the temp is below > 40c, jog the fan voltage down. If above 40c, jog it up. The jogs are > small and it powers up slow, so there is no acoustic drama. >That only works if there are no other major variable heat producers far away from the oscillator.> https://www.dropbox.com/s/uf15erm1nj3tjjk/Colpitts_125.JPG?raw=1 > > There are varicaps and things too. Everything affects the tempco. I > can tune C4 to zap the 1st order term. > > Worst case, every batch of PCBs could have a different value of C4. > Production would *not* like that. >Whenever I had something like that I'd always use a varicap and some sort of algorithm. The production guys didn't even have to know it was there. Of course, there is the other option of running the whole board in transformer oil :-) -- Regards, Joerg http://www.analogconsultants.com/
Reply by ●October 2, 20202020-10-02
On 2020-10-01 11:39, Joerg wrote:> On 10/1/20 7:45 AM, Three Jeeps wrote: >> On Thursday, October 1, 2020 at 1:09:03 AM UTC-4, Joerg wrote: >>> On 9/30/20 8:46 PM, jla...@highlandsniptechnology.com wrote: >>>> >>>> In the last week, I've been burned 6 times, shocked once, punctured >>>> (with blood) twice, and had to eat a single burger for three lunches >>>> in a row. And we are out of ice cream sandwiches. >>>> >>> Could be worse. BE-256 yeast is out of stock everywhere for months and I >>> can't brew Belgian abbaye ales. That's serious! >>> >>> :-) >>> >>> -- >>> Regards, Joerg >>> >>> http://www.analogconsultants.com/ >> https://homebrewsupply.com/fermentis-safbrew-be-256-yeast/ >> > > Nine bucks, yikes! Oh well, goes like ammo I guess. A poster in the brew > NG pointed out another place but I found that their BE-256 yeast was > quite old. > > Somehow production of this stuff must have stopped. >You can't culture your own? The monks didn't buy yeast from Amazon. ;) Cheers Phil Hobbs -- Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC / Hobbs ElectroOptics Optics, Electro-optics, Photonics, Analog Electronics Briarcliff Manor NY 10510 http://electrooptical.net http://hobbs-eo.com
Reply by ●October 2, 20202020-10-02
On 10/2/20 2:10 PM, Phil Hobbs wrote:> On 2020-10-01 11:39, Joerg wrote: >> On 10/1/20 7:45 AM, Three Jeeps wrote: >>> On Thursday, October 1, 2020 at 1:09:03 AM UTC-4, Joerg wrote: >>>> On 9/30/20 8:46 PM, jla...@highlandsniptechnology.com wrote: >>>>> >>>>> In the last week, I've been burned 6 times, shocked once, punctured >>>>> (with blood) twice, and had to eat a single burger for three lunches >>>>> in a row. And we are out of ice cream sandwiches. >>>>> >>>> Could be worse. BE-256 yeast is out of stock everywhere for months >>>> and I >>>> can't brew Belgian abbaye ales. That's serious! >>>> >>>> :-) >>>> >>>> -- >>>> Regards, Joerg >>>> >>>> http://www.analogconsultants.com/ >>> https://homebrewsupply.com/fermentis-safbrew-be-256-yeast/ >>> >> >> Nine bucks, yikes! Oh well, goes like ammo I guess. A poster in the >> brew NG pointed out another place but I found that their BE-256 yeast >> was quite old. >> >> Somehow production of this stuff must have stopped. >> > > You can't culture your own? > > The monks didn't buy yeast from Amazon. ;) >Sure you can and I do that to some extent. I harvest yeast from previous batches. For example, because of BE-256 being expensive and now almost unobtanium I stagger my Belgian beers. A Paterbier is mild and takes one pouch. Then I siphon off trub but for more 2x the initial number of yeast cells. Then I brew a Tripel or Quadrupel which needs a high dose of yeast. Later I siphon that and make a Porter with it. The rest of the trub doesn't go to waste either because we bake bread with it. However, so far I've never dared to go past 4th generation with yeast. Mutations can result in off-flavors or worst case a ruined batch. Considering that 4-5h of work go into each batch that would not be cool. -- Regards, Joerg http://www.analogconsultants.com/
