@Hypatia's Protege

HP I'm going 2 make this short and sweet cuz that's all I have time for right now! So I totally like your idea abt basing python Smith chart algorithm on Riemann sphere but they (by who I mean most of Alpha team and test readership) just don't get it no matter how I try 2 explain it!

HP Being totally serious I can't even make them understand that even standard _2D_ smith chart is basically just transformed Riemann plane or even how it can be extended left of axis!

HP Now I'm going to say something! So ok! b4 u even say it! I agree that expecting all newbies 2 grasp nuances of complex analysis is unrealistic! But totally basic math concepts (like derivatives) either have 2b prerequisites OR we have to teach them as part of series! o/c third way is to just say _here's the numbers_ (which I don't have huge problem with since it's like _peripheral_ to scope of series anyhow cuz being realistic, math lessons can't compete with hands-on projects in eyes of most beginners!)

So anyhow I TOTALLY AGREE tutorials are supposed 2b educational with projects as like u say 'hook' but I say it's totally imperative 2 capture their interest B4 getting so quantitative that we scare them off or put them to sleep

So HP I know u say you lack 'teacher gene' too but u have major quality I don't which is PATIENCE! So I'd totally appreciate it if you can find time to explain it 2 them cuz I've definitely done all I can!

 

Indeed! It is my experience that, properly applied, silicone dielectric gels typically achieve greater dielectric strength than available with common hydrocarbon potting oils (e.g. Shell Diala, etc) -- unfortunately, gel-dielectrics' 'Dippidy-Do' consistency significantly complicates degassing/de-aeration...

On thinking about this further. What says the at the fill has to be done completely at one time? Fill up to the lowest level of the components and vacuum. Then another fill part way up the components and vacuum again. Then do it again as many times as needed until the container is full.

 

So just FYI here's example of cut-away view of B150 style housing w tube installed

I would be very surprised if the internal vacuum in that component was pulled through the "O" ring area shown in the picture. That "O" ring is just here to keep the vacuum in the component, not the point that the vacuum was induced.

 

I would be very surprised if the internal vacuum in that component was pulled through the "O" ring area shown in the picture. That "O" ring is just here to keep the vacuum in the component, not the point that the vacuum was induced.

Shortbus ur totally correct that o-ring isn't used as check valve! Xray heads are potted by immersing whole assembly under oil in flooded VC and sealing housing AFTER processing! Whole purpose of o-rings and other housing seals is 2 keep oil in and atmosphere out once potting process is complete!

So anyhow sry for being too scarce around here So fwiw I'm fighting 2 design proper ion trap config for my latest project (which btw is nothing 2 do with EHT tutorials) but Penning/Paul setup caused unexpected and vry expensive failure cuz of MY moronic oversight So anyhow it's like HP says _where would I be w/o my hobbies 2 relieve stress_

 

I agree that expecting all newbies 2 grasp nuances of complex analysis is unrealistic!

Sad but true -- A sorry 'fact of life', I hasten to add, not exclusively endemic to 'America'....

But totally basic math concepts (like derivatives) either have 2b prerequisites OR we have to teach them as part of series!

Indeed! -- But then inasmuch as we're without requirement of (substantively) 'crossing' that particular 'bridge' prior to "Installment Three" -- it's looking like a non-issue for the foreseeable future --- Then too, it has long been my observation that fundamental concepts are not-uncommonly 'picked up' collateral to practice! -- Meanwhile, as regards appreciation of/compensation for surface-loop dynamics (attendant to, for instance, disruptive discharge) in addition to such 'early days' topics/observations as charge distribution, optical polarization and 'ion-motion' phenomena -- I'm quite content to merely 'hand them the numbers' pending proper treatment -- with the qualification that we'll happily provide 'on the spot' in-depth analysis upon request!

On thinking about this further. What says the at the fill has to be done completely at one time? Fill up to the lowest level of the components and vacuum. Then another fill part way up the components and vacuum again. Then do it again as many times as needed until the container is full.

Thank you! -- Inasmuch as dielectric gels and amorphous 'solids' are preferred for their notably reduced 'electro-cavatation'/electrostriction (by comparison to oils) and, hence, superior maintenance of effective dielectric strength under stress -- we may well 'go that route' should room-temperature 'solids' (e.g. 'waxes') prove impractical...

I would be very surprised if the internal vacuum in that component was pulled through the "O" ring area shown in the picture. That "O" ring is just here to keep the vacuum in the component, not the point that the vacuum was induced.

As per Aleph -- the function of the seals is maintenance of housing hermeticity 'in the mission field' as it we're -- The 'housing' is sealed (with attachment/closure of the expansion diaphragm) at conclusion of the potting process! --- Sincere apologies for lack of clarity on that point...

So anyhow it's like HP says _where would I be w/o my hobbies 2 relieve stress_

Ain't it Du... Ahem... Da-Truth!

Very best regards
HP

 

@Hypatia's Protege

plz e me when ur back to work on here cuz there's just nothing for me to do on here b4 that!

 

@Hypatia's Protege

plz e me when ur back to work on here cuz there's just nothing for me to do on here b4 that!

---Emphasis added---

And I submit that you might 'fill the empty spaces' of your days via proofreading (and, where indicated, amendment) of my blog content via transferring 'troublesome' entries to your blog for 'edit access'? -- But then I 'spose we all have our problems

To the team and all interested parties: I believe I've found an acceptable EHT potting solution sans requirement of vacuum pumps/chambers or dielectric gasses --- You may expect a detailed, illustrated description of said process (posted here) as soon as I find time for thorough 'in vivo' evaluation of same! (another week to 10 days 'oughta' do it)

Very best regards
HP

 

And I submit that you might 'fill the empty spaces' of your days via proofreading (and, where indicated, amendment) of my blog content via transferring 'troublesome' entries to your blog for 'edit access'? -- But then I 'spose we all have our problems

HP we've been all through this b4! So AFAIC there's just two ways!

◊Share your password with me so I can edit content like u say _in situ_ in your blog
◊Or expect my help when you are back on here on regular basis!

Your busy off-line schedule is NOT my problem cuz I have my life too!

 

Sounds like some one needs a midol.

 

◊Share your password with me so I can edit content like u say _in situ_ in your blog

As previously discussed, sharing of our users (accounts) is not a good idea on credibility grounds -- we can hardly ask/convince readers to make significant investment of time and resources all the while appearing (in your words) 'Like a lot of FB kids putting on a Punch and Judy show' (possible paraphrase)...

Had I my 'druthers' we'd adopt your original idea whereby my blog would be transferred to a third user (entitled 'EHT_TutDev' or similar) to be shared by you, Theo, JC, myself and any other core Dev team members (deigning to first register their own private AAC accounts) -- Said 'development account' would be used solely for blog entries/edits and all activity signed and dated -- Moreover, the account 'signature' would reflect the nature of said account.

Inasmuch as site rules are ambiguous as regards 'shared users' taken with the fact that 'administrative assistance' is required to (legitimately) bypass the 'new member' (i.e. low post count) restrictions - I am uncomfortable proceeding with said course sans affirmative leave from site administration -- While a 'direct appeal' (via PM) may elicit a 'go/no go' response - I hesitate to tender a request prior to 'stabilization' of my schedule (such that any effort on our behalf will not have been in vain...)

◊Or expect my help when you are back on here on regular basis!

Fair enough...

Your busy off-line schedule is NOT my problem

Indeed not -- So, then... Why are you making it your problem?

Sounds like some one needs a midol.

Yikes! Acetaminophen is a bad agent! -- I somehow doubt Aleph(0)'s 'sunny disposition' would be augmented via hepatic injury -- But who knows? T'would be compelling motivation not to drink...

Best regards and TTFN
HP

 

Yikes! Acetaminophen is a bad agent! -- I somehow doubt Aleph(0)'s 'sunny disposition' would be augmented via hepatic injury -- But who knows? T'would be compelling motivation not to drink...

That was meant as a joke to her. She was also being PMS in another thread. But then I may have over stepped the boundaries yet again. But like I tell my wife, I'm suffering from 'dumbhizers' now that I'm getting older.

 

That was meant as a joke to her. She was also being PMS in another thread. But then I may have over stepped the boundaries yet again. But like I tell my wife, I'm suffering from 'dumbhizers' now that I'm getting older.

Shortbus I say you didn't overstep line at all cuz ur absolutely right abt me being too _snippy_ on fora cuz of bad mood from offline agro (which is no excuse at all).

But who knows? T'would be compelling motivation not to drink...

HP Just 2 say I don't mind your well meaning jokes at my expense as long as u take care to not give impression I'm actual alky! Cuz it's like what u said to that _even tempered gent_ on _Why Vote_ thread, anyone who wants to can easily figure out our real world identities just based on info in our posts on here plus our _ringer_ avatars aren't helping our anonymity either So I say it's good idea 2b careful abt giving wrong impressions with unqualified jokes!

 

Shortbus I say you didn't overstep line at all cuz ur absolutely right abt me being too _snippy_ on fora cuz of bad mood from offline agro (which is no excuse at all).


HP Just 2 say I don't mind your well meaning jokes at my expense as long as u take care to not give impression I'm actual alky! Cuz it's like what u said to that _even tempered gent_ on _Why Vote_ thread, anyone who wants to can easily figure out our real world identities just based on info in our posts on here plus our _ringer_ avatars aren't helping our anonymity either So I say it's good idea 2b careful abt giving wrong impressions with unqualified jokes!

Aleph ... from the bottom of my heart, please don't ever change, nor try to become someone different from what you're already are. You're one of the most authentic, and likable, characters I've ever met... cheers!

 

Aleph ... from the bottom of my heart, please don't ever change, nor try to become someone different from what you're already are. You're one of the most authentic, and likable, characters I've ever met... cheers!

Cmartinez HUGE tnx for kind thoughts and words and sincere DITTOs 2 you!

 

Aleph I also second C's sentiments. Like you I can't change who I am. But will continue to apologize if I go past an imaginary line. Who and how I am online is exactly who and how I am in person. Can't seem to get a grip on people who portray themselves different online.

 

Aleph I also second C's sentiments.

Shortbus HUGE tnx!

Who and how I am online is exactly who and how I am in person.

Shortbus believe it or not that's basically true for me too except that if you met me in person I'd prolly be easier 2 take seriously! So just thinking on it, my _on line_ persona is less inhibited and so closer to the _real me_ than in real life so IDK if that's good or bad.

Can't seem to get a grip on people who portray themselves different online.

Shortbus I say seriously trying to assume faux on line persona is mostly just a _kid thing_ FWIW most ppl I personally know are same on and off line

So just FYI my silly _Shirley Temple-cum-Fleur Bennett_ mode of expression is end-product of what basically started as joke I was playing on @Hypatia's Protege but I couldn't help like _drifting_ toward true type So for comparison plz look on my early posts where I was doing vry poor impression of ESL speaker So like HP says I basically _Andy Kaufmanized_ myself back then! So I say important thing is I am who I am here! Just with more mature real life verbal skill

 

--- Place Holder ---

 

Note that the supplied thermostat is unacceptable (for its wide 'hysteresis'/full on-off thermal regulation scheme) and, hence, will be discarded in favor of a 'continuous' (albeit non-active) 'regulation' approach...

HP I totally agree we need 2 control temp by adjusting current through resistor _element_ instead of just switching it on and off which would definitely get it hot enough to pyrolyse wax near resistor even though average temp is ok! So I totally say your idea is perfect except just one suggestion which is to connect variac 2 skillet through its t-stat set on like 180°C (so abt 360°F) as failsafe! That way if like u say _stuff happens_ only loss will be wax (cuz of contamination with carbon flecks cuz of charring over resistor area) which I say is way better that burning wax and molten Al!

a 1kW ferroresonant (Spec: 'constant voltage') transformer

A full-wave 'phase-control' circuit may be substituted for the variac.

So just for ppl wanting 2 do it on the cheap, required pwr is 500W MAX so since element is pure resistive load just a 500VA FR transformer with standard 600W light dimmer for phase ctrl will totally be enough!

Of course I don't expect anyone to 'stand guard' over the several hours' long process -- merely to keep it in view - This does not mean via 'WIFI cams' and their ilk (all of which have a 'proclivity' for 'silently' 'freezing' and thus presenting a 'stale' image of the monitored scene)...

HP I say solution for that is 2 have constantly moving object in camera's fov (like clock with sweeping second hand) that way ppl can tell if it's live image!

Also I say is good idea to put ionization (but definitely not totally WORTHELESS photoelectric!) smoke detector above pan! Then slightest smoking from wax will totally set it off!

 

Or a slow cooker could be used.

 

Or a slow cooker could be used.

Shortbus that would definitely solve problem of fire risk and charring wax cuz resistance of element is too high to get that hot even w/o thermostat so it also heats up nice and even w/o _hot spots_! So anyhow only problem is it doesen't get hot enough for wax cleaning phase (which needs 2b at least 160°C) cuz cooker maxes out at abt 110°C) so temp could prolly be kicked up using variac connected for boost but element might not take it and ceramic liner could break! So anyhow HUGE tnx for suggestion cuz if skillet doesn't work out we'll definitely be investigating your _Crock Pot_ idea!

@Hypatia's Protege just to say looking on your blog there's problem with _group pic_ of skillet potting equipment cuz of fringe on barrier booth curtain causing long λ filter artifact on upper left! So even though it doesn't block view of equip I knew you'd want heads up b4 attaching it to post! Also I say instead of putting pix on separate post you can just delete post 1187 and repost it in new post with pix attached!