Note to readers
Inasmuch as such is contrary to the goals of this effort and/or represents defacto continuation of 'guidance' by non-registered 'developers', please be advised that I will no longer be responding to email messages in regards to this series!
Moreover, email or other communication of a 'personal' nature is unwelcome in all cases!

Please note that @Aleph(0) has indicated her kind willingness to provide off-list assistance to readers demonstrating genuine privacy concerns (to her satisfaction). Said 'demonstration' including ---while not necessarily limited to--- ZERO discernible history of social media presence/participation on the part of said interlocutors! --- Be advised, however, that contributions, comments and all manner of input will be accepted from registered AAC members only! -- No exceptions!

As Regards AAC's PM feature:
Although neither of us have experienced difficulty/annoyance via said feature to date -- We nonetheless ask that all inquires, comments, error reports, suggestions, etc... are posted in public view! --- Appropriate PM messages will be limited to active discussion of future tutorials/projects, administrative/moderation matters and issues that, while germane to the series, are otherwise inappropriate for publication...

Please rest assured that public 'error reports' and 'heads ups' do not embarrass us! -- Indeed such are greatly appreciated!

@Aleph(0) as per your request:

Re: the LVPSU project -- Below is the latest draft of the bypass failure annunciation circuit -- While indeed, K1 begins saturating at E(L1) ≈ 200V Peak (i.e. ≈ 140V RMS) such is of little concern up to and including 240V (RMS) -- as will be discussed in its turn!

Best regards
HP

 

Isn't that special! You speak of 'respect'? Did it occur to you that had I wished to share an image of myself I would have done so of my own accord?

Sugarcoat it with all the cloying sentiment you like! Rationalize it as you will -- The fact remains that your unauthorized publication of my image is a dox and a dox is a betrayal in 'my book'!

HP I'm truly sorry! But this whole thing is just a huge misunderstanding! I totally thought you'd already publicly shared pix of yourself based on a post that I can't find now! It was that post between A0 and the author of ham radio books who was planing to look for you at Dayton last year! @Aleph(0) plz help! Anyway tnx for sparing me the embarrassment of bringing site Mgmt into it! I mean, as angry as you were, and had every reason to be, you treated it as a family matter! Words can't express how much that means to me!

So HP if I were u I'd definitely want to know who's on viewer list! So I say you should check JC's blog 2 see if ur on list cuz if not he's playing major league games!

There's no viewers list! I just wanted to keep it a surprise until my post! HP I swear my whole intent was just what I said! A happy reminder of last season and the coming season!

So I say JC is double f'ked up saying I thought it was Dayton AND thinking that would be fond memory of antique show when u were worried all your purchases were in path of storm!

A0 plz be fair! Ok! I misunderstood you about the location! Excuse me for being human! And how was I supposed to know there was a storm coming on? You didn't say anything about that when we were looking through the pix!

@Aleph(0)! --- Be advised that should I discover that you had foreknowledge of JC's plans to post my image

HP I swear she didn't! I wanted to keep it a surprise so I didn't tell anyone what I had in mind! So as far as A0 knew we were just sifting through the card before wiping it!

HP If you can forgive me you totally have my word! NO MORE SURPRISES! I totally mean it! Plz feel better my friend!

 

HP If you can forgive me...

@Jazz2C Enough with the drama! Puhleeze!

You are welcome to participate as a member of our on-line 'team' (which being the sole development team as per 'The New EHT Order') under the following conditions:

1) Dare to think before you do!
2) Refrain from salutation/commentary of an amative , affectionate or otherwise unduly sentimental nature.
3) Endeavor to keep at least 80% of your content on-topic.
JC? In case you didn't 'get' all that - I'm merely asking you to act your age! ...K?

As you are aware, I'll be 'scarce' prior to Tuesday week (i.e. May 21) - Be advised, however, that @Aleph(0) expects to have time here beginning Wednesday/Thursday morning...

@Aleph(0) @Jazz2C @theodoravain --- Jeeeze! It would be nice to return to a completed EHT indicator construction presentation!? --- Please don't concern yourself with the improved rib mounting technique at this time -- I plan to 'up' images of the towers so modified following re-determination of optimal costal placement/intercostal separation (the slightly reduced effective costal radii being 'factored in') -- Inasmuch as the physical radii (5 cm) are unaltered, you may present construction of said ribs as per my blog and notes...

Please note:
1) All required images should be on my blog -- Failing which, please 'compose around' missing images leaving a 'place holder' for same that I may capture and 'up' said outstanding images to my blog (upon my return) from whence you may appropriately link/embed them...

2) Please see my notes as regards tools with special attention to use of a 'circle cutter' ---as opposed to--- a 'fly cutter' (seems readers prefer 'drill presses' to 'milling machines' -- go figure...)

Very best regards
HP

 

I just wanted to keep it a surprise until my post!

Mission accomplished!

 

@Jazz2C Enough with the drama! Puhleeze!

​

 

Mission accomplished!

Indeed! -- Though I daresay @Jazz2C missed the point -- to wit:

The best surprise is no surprise!

SMH
HP

 

@Aleph(0) @Jazz2C @theodoravain --- It's all yours for the 'duration'!

To our long-suffering readers and AAC-member contributors -- Please know that @Aleph(0) should return to activity here soon!

See y'all (no later than) early June...

Very best regards
HP

 

So @HP is all over me demanding I sign in for the count. So here I am! Well.. Julie will be awhile yet so.. looks like you're all stuck with me for a few. Sorry, that's life! No tears please! The benefits of lurkdom have absolved me of absolute cluelessness.

OBTW, Julie WHY are you making them find krytrons (that's krytrons not klystrons, JC!) for low energy commutation? Modern thyristors are better suited to that! Am I wrong? Educate me!

Hey Julie, I must say that the concept of "electron moderation" and "thermal electrons" is less than helpful! Yeah! I can handle analogy! But that's worse than dumbing down! It totally misses the point! Seems to me disruption of nuclei with betas requires energies very nearly approaching luminary velocity? Unless your analogy is reversing the common sense of "moderation" to mean acceleration? But what a concept! Disruption of atomic nuclei by "humble" near luminary velocity betas! Well.. Yeah! I can't say impossible! According to "Uncle Albert" even the mass of a beta equates to infinite energy at "c"! Then we could disrupt galaxies, universes even Julie? You may now thank me kindly for stopping short of the ultimate phy-sci blasphemy! Consider this my genuflection to the altars of "Uncle Albert" and "Cousin Maxwell"

Thanks!

 

I sense a cat fight in the near future.

 

OBTW, Julie WHY are you making them find krytrons (that's krytrons not klystrons, JC!) for low energy commutation? Modern thyristors are better suited to that! Am I wrong? Educate me!

Hey Julie, I must say that the concept of "electron moderation" and "thermal electrons" is less than helpful! Yeah! I can handle analogy! But that's worse than dumbing down! It totally misses the point! Seems to me disruption of nuclei with betas requires energies very nearly approaching luminary velocity? Unless your analogy is reversing the common sense of "moderation" to mean acceleration? But what a concept! Disruption of atomic nuclei by "humble" near luminary velocity betas! Well.. Yeah! I can't say impossible! According to "Uncle Albert" even the mass of a beta equates to infinite energy at "c"! Then we could disrupt galaxies, universes even Julie? You may now thank me kindly for stopping short of the ultimate phy-sci blasphemy! Consider this my genuflection to the altars of "Uncle Albert" and "Cousin Maxwell"

Thanks!

Theo? Why did you make that contextually mangled response to A0's posts on another site? And FYI @Hypatia's Protege is planing orthovoltage and EBRT projects for these EHT courses but radioactive materials and any sort of nuclear reactors are right out!

I sense a cat fight in the near future.

Not if @theodoravain starts remembering to take her meds! That's a joke but maybe it shouldn't be?

You are welcome to participate as a member of our on-line 'team' (which being the sole development team as per 'The New EHT Order') under the following conditions:

Accepted!

(seems readers prefer 'drill presses' to 'milling machines' -- go figure...)

No big mystery! IMO It's just a matter of cost! Source: I'm a student!

 

@Aleph(0)
I'm trying! I really am! So far all I've managed to do is mess the IGBTs up with the MOSFETs (IGBTs are too slow) and my socialization on other fora looks like it's gone political
Shoot me a text when you're back! Until then I better just drop out! @HP's given me a second chance. I don't want to blow it!

 

So @HP is all over me demanding I sign in for the count.

I suppose I should say thank you, but somehow...

Theo? Why did you make that contextually mangled response to A0's posts on another site? !

Why indeed?

Julie? You may now thank me kindly for stopping short of the ultimate phy-sci blasphemy! Consider this my genuflection to the altars of "Uncle Albert" and "Cousin Maxwell"

You might want to re-think that, Theo! --- No one here is an 'icon worshiper' - Nor does 'icon worship' constitute any manner of science! -- That said, we do insist upon attribution (Re: Axioms, formulae, etc... -- 'credit where credit is due' ≠ acquiescence!)

Accepted!

Sincerely, thank you!

So far all I've managed to do is mess the IGBTs up with the MOSFETs (IGBTs are too slow)

Once again -- May we please defer public discussion of future topics (in this case exciters/drivers) pending presentation of same! -- In case you hadn't noticed - this thread is sufficiently 'fragmented'!

and my socialization on other fora looks like it's gone political

@Jazz2C -- As strongly as I agree with your stance - and as much as I understand your feelings on the subject --in any event-- but moreover made highly personal owing to victimization of a member of your family by the manifestation of fascism alluded to in your post --- I must, nonetheless, point up the fact this (i.e. AAC) is not the place! --- Vital as it is to all we are as a society - indeed as a species - Human Rights constitutes a political topic --- Let's keep it light! Let AAC (and its ilk) be a place we visit to learn and teach sans intensity of emotion! Not a 'safe space' but, rather, a cordial, constructive space ...K?

Best regards
HP

PS @Aleph(0) is hoping to return next week (poor overworked girl!)

 

OBTW, Julie WHY are you making them find krytrons (that's krytrons not klystrons, JC!) for low energy commutation? Modern thyristors are better suited to that!

Not in 3.3 megavolt E-field!

Hey Julie, I must say that the concept of "electron moderation" and "thermal electrons" is less than helpful! Yeah! I can handle analogy! But that's worse than dumbing down! It totally misses the point!

Theo I say u need to apply _modified rule of basic courtesy_ to your comments! By which I mean: If u can't say something sensible, don't say anything at all! Anyhow only reason ur confused is cuz as usual you totally misunderstood what I was saying!

Theo? Why did you make that contextually mangled response to A0's posts on another site?

JC I say FOR ONCE that's a vry good question! Theo I say u need to follow advice of ancient text that I'm paraphrasing as: _Render to Provost the things that are Provost's; and to AAC the things that are AAC's_!

@Aleph(0)
I'm trying! I really am! So far all I've managed to do is mess the IGBTs up with the MOSFETs (IGBTs are too slow) and my socialization on other fora looks like it's gone political
Shoot me a text when you're back! Until then I better just drop out! @HP's given me a second chance. I don't want to blow it!

JC I say you need to GET OVER IT!


HP now I'm going to say something! I will return the second u start on EHT discussions and projects instead of peripheral topics! So I totally understand why u want to present _battery eliminator_ and EHT meter project but it totally bogs down progress on main topic! I Also say anybody who doesn't understand abjectly basic concepts of how to make a linear LV PSU and DC kV meter can't be vry interested in electronics at all!

HP so I totally understand that you need to finish those topics since u started them but it totally looks like you've been basically inactive on this thread during my absence!

Anyhow I say u need to make PUBLIC posting of your plans for future of tutorials!

 

HP now I'm going to say something! I will return the second u start on EHT discussions and projects instead of peripheral topics! So I totally understand why u want to present _battery eliminator_ and EHT meter project but it totally bogs down progress on main topic! I Also say anybody who doesn't understand abjectly basic concepts of how to make a linear LV PSU and DC kV meter can't be vry interested in electronics at all!

What happened to...

Now it's vry important 2 let everyone know that LVPSU and EHT meter are definitely NOT digressions! Even though they're vry basic equipment they're also vry specialized! So we definitely don't want ppl ruining their Lab SMPSUs trying to power EHT PSU or risking their health and safety trying to measure EHT with TV HV probe!

?

but it totally looks like you've been basically inactive on this thread during my absence!

Remember this?

@Aleph(0) @Jazz2C @theodoravain --- Jeeeze! It would be nice to return to a completed EHT indicator construction presentation!?

Yet not one of you so much as remarked upon said request let alone endeavoured to honour same!

Anyhow I say u need to make PUBLIC posting of your plans for future of tutorials!

Dear me! Is that what you 'say'? -- Very well then, here it is: I will be delighted to return to participation on this thread and its associated tutorials/projects the very picosecond that you, @theodoravain and @Jazz2C demonstrably indicate your collective willingness to do 'your share'! --- Such does NOT include larking about (@Aleph(0)) -- Unwelcome 'surprises' (@Jazz2C) or 'waiting in the wings' (@theodoravain)...

Stated all 'down home and American-like' the ball's in y'all's court! Got it?

Sincerely
HP

 

@Jazz2C -- remember this?

Note to readers
Inasmuch as such is contrary to the goals of this effort and/or represents defacto continuation of 'guidance' by non-registered 'developers', please be advised that I will no longer be responding to email messages in regards to this series!

'Nuff said...
HP

 

Dear me! Is that what you 'say'? -- Very well then, here it is: I will be delighted to return to participation on this thread and its associated tutorials/projects the very picosecond that you, @theodoravain and @Jazz2C demonstrably indicate your collective willingness to do 'your share'! --- Such does NOT include larking about (@Aleph(0)) -- Unwelcome 'surprises' (@Jazz2C) or 'waiting in the wings' (@theodoravain)...

Stated all 'down home and American-like' the ball's in y'all's court! Got it?

Sincerely
HP

HP I'm totally through arguing abt it! Cuz I say TIHIDI should be what it says (which is _this is how I did it_!) It definitely shouldn't mean spending forever re-doing material again and again every time someone comes up with different approach! People with ideas for alternate techniques that could be helpful or less expensive for some builders need to post them as responses on thread and comments to TIHIDIs in your blog! Cuz that way each reader can decide what suits their needs! Cuz after all whole idea of TIHIDI is to present concept w/o insisting it's only or even preferred way for everyone!

Now I totally agree that tutorials (which AREN'T TIHIDIs) are totally different matter cuz of safety of life and property issues! So suggested deviations from exact procedure has to be vry carefully considered b4 our like _endorsement_!

HP also I totally insist on moving thread to proper on-topic forum! Prolly _Power Electronics_ or _Projects_ for now and definitely _Physics_ when we get to EHT Applications discussion! So for improved _file order_ we can start new thread dedicated to developing EHT Apps tutorials when we get to them.

Now I'm 100% cool with giving this thread some more time (like ≈ 100 more posts) before move to prove we have _self discipline_ to keep it on topic! Also, I totally understand why you had it moved here 4 years ago which I say was totally appropriate at time! But since _times have changed_ and it's now part of serious effort, thread definitely needs to go back where it belongs!

HP I definitely get how my absenteeism and @Jazz2C disrespecting your privacy on here has like _taken zest out of it_ for you but I also say MAIN problem is stagnation cuz of perfectionism in totally peripheral areas!

So as example of what I'm talking abt, I agree that _bullet proof_ variable high-I unregulated linear LVPSU and versatile EHT meter are necessary prerequisite projects! But I also say you need to just present the TIHIDIs and links to viable suggestions from AAC-registered contributors and GET ON WITH TUTORIALS! Cuz right now, for a lot of readers, it must be like trying to work up to being world-class chef but never getting past washing-up crew!

Yet not one of you so much as remarked upon said request let alone endeavoured to honour same!

HP speaking just for myself I say it was rude of you asking us to basically clean up YOUR mess! It's like old joke abt someone accidentally dropping piece of valuable jewelry in toilet bowl and being too squeamish to retrieve it themself! So everyone they ask to do it for them says: _YOU dropped it in, YOU take it out!

 

HP I'm totally through arguing abt it! Cuz I say TIHIDI should be what it says (which is _this is how I did it_!) It definitely shouldn't mean spending forever re-doing material again and again every time someone comes up with different approach! People with ideas for alternate techniques that could be helpful or less expensive for some builders need to post them as responses on thread

---Emphasis Added---

Isn't that how we've been conducting it?

and comments to TIHIDIs in your blog!

Re: my blog entries -- Reader-suggested 'alternate approaches' will (and are) included via 'copy and paste' (to assure verbatim reference and full attribution)! Directly posting comments upon the blog entries themselves is neither welcome nor allowed - lest said 'forum' take on the principal negative attribute of 'Quora' -- a largely well-conceived venue but for the irksome tendency of 'the discussion' to 'devolve' to the 'comments' at not-inconsiderable cost to the 'host thread' proper!

Now I totally agree that tutorials (which AREN'T TIHIDIs) are totally different matter cuz of safety of life and property issues! So suggested deviations from exact procedure has to be vry carefully considered b4 our like _endorsement_!

That much goes without saying...

HP also I totally insist on moving thread to proper on-topic forum! Prolly _Power Electronics_ or _Projects_ for now and definitely _Physics_ when we get to EHT Applications discussion! So for improved _file order_ we can start new thread dedicated to developing EHT Apps tutorials when we get to them.

Now I'm 100% cool with giving this thread some more time (like ≈ 100 more posts) before move to prove we have _self discipline_ to keep it on topic!

I have no argument with that...

HP I definitely get how my absenteeism and @Jazz2C disrespecting your privacy on here has like _taken zest out of it_ for you

TOO BLOODY RIGHT IT HAS! To date it seems I've done at least 80% of the work and received 200% of the agro!

HP speaking just for myself I say it was rude of you asking us to basically clean up YOUR mess!

Here we've a comparatively 'trivial' --nonetheless 'telling'-- example of my point! -- To wit: Re: said project - I've captured 100% of the images, composed 100% of the text (save for the alternate-approach contributions) but am now receiving blame for its non-publication from one who has been, for all intents and purposes, absent from these fora for over two months!

As previously stated -- the 'if and when' of this series' continuation is your call!

Sincerely
HP

 

HP I definitely get how my absenteeism and @Jazz2C disrespecting your privacy on here has like _taken zest out of it_ for you

TOO BLOODY RIGHT IT HAS!

HP I wish you could try 2b more sensitive to JC's feelings on this! Cuz now he's like totally _devastated_ abt ruining EHT tutorials on here! Anyhow like I've been saying series isn't necessarily ruined just on hiatus until we (by who I basically mean you and I) can come to agreement abt like _work load_ sharing!

I've captured 100% of the images, composed 100% of the text (save for the alternate-approach contributions) but am now receiving blame for its non-publication from one who has been, for all intents and purposes, absent from these fora for over two months!

HP I'm calling foul on that! Cuz even though my absence has been like _contiguous_ I don't see how that's any different or worse than your SOP of _fragmented absenteeism_!

As previously stated -- the 'if and when' of this series' continuation is your call!

HP you totally know my call is to continue! But b4 we can do that, we definitely need more _structure_ and a definite plan TO MOVE THREAD BACK TO ON-TOPIC FORUM once we're _up to speed_!

So cuz of VPN, I can't reliably upload pix, so that's definitely your dept! Now I'll be totally happy to compose my fair share of the _TIHIDIs_ but since it's YOU who insists that main tutorials have _single voice_ I say you elected yourself to that _post_ (pun totally intended)!

HP I say main thing is we need structured, assignment-based SYSTEM cuz like FEMA PSA says _winging it isn't a plan_!

///////Here's off-topic delimiter//////

HP, @theodoravain was asking me abt old indoor TV antenna (which she bought at SF to re-purpose for 2m xcvr) called _bunny ears_! And original setup is even stupider than its name! Cuz it's open dipole (which o/c has theoretic resonant Z of 84.47∠30.21° (so 73Ω+j42.5Ω rectangular) Anyhow once reactive part is _nulled out_ by slight shorting antenna it gives good resistive termination in area of 73Ω (now actual Z is lower than free space ideal but it's good approximation). So anyhow STUPID part is there's no BALUN at antenna! Just 300Ω balanced lead from antenna elements to 75Ω unbalanced front end of typical old TV tuner! So it's already 4X impedance mismatch (so abt 2dB attenuation!) plus no provision against common mode currents!

So anyhow I told her how to wind 75Ω to 50Ω BALUN for use with her 2m rig and be happy! (Now actually my solution is unun+balun combo cuz I'm crazy OCD abt it!).

So anyhow my question is WHY did manufacturer connect ≈75Ω balanced antenna to ≈ 75Ω unbalanced receiver front end with 300Ω balanced transmission line? Even if TV has internal 4:1 BALUN (so ant. terminals are 300Ω unbalanced) I still say BALUN belongs at antenna (to prevent Ant to line mismatch)! NOT receiver (which is 'load' in this case)!

OBTW, HP I swear one 'peep' abt _common mode currents aren't big deal_ will make me VERY hard 2 get along with!

 

The best approach is removal of the subsidiary winding and its associated (transfixing) cylinder followed by 're-mounting' of the EHT tyre, as it were...

FYI: The lug carrying the horizontal sweep amplifier's anode lead likewise carries two leads from the windings, one being the 'cold' end of the EHT winding and the other, the 'top' of the subsidiary winding (which being connected to all other taps) -- the process involves separation of the EHT return, 'evisceration' and removal of the subsidiary winding assembly and construction of a 'hub' fashioned of polypropylene and CPVC sleeves and electronics grade silicone adhesive.

Should you desire a 'step by step' I'll gladly oblige but please be sincere! --- Immersion in dielectric oil is problematic inasmuch as oil contamination and bunting material degradation will likely occur --- A 'quick and dirty' workaround merely disconnects the EHT return from the subsidiary winding then isolates same with petroleum 'wax'... Such an arrangement should allow upwards of 20KV (sufficient for the proposed dual transformer implementation) -- Be warned, however, that even moderate heating will melt the 'wax' resulting in failure --- While a similar expedient may, of course, be had with adhesives possessed of more acceptable thermal properties -- such is inadvisable for complications attending the essentially permanent nature of said applications...

Below are images of a fully reconstructed transformer... As with the transformer shown in post #4 this is now 'good' to 50kV+ --- Details upon request...

View attachment 89244

View attachment 89245


As I said, no pressure intended! Just wanted you to know that I may not be able to get the info prior to early Aug...


It's your fantasy! You tell me...


Say what?! -- I don't know whether to suggest a translator or a detox center!


Because you are not an idiot you know the answer to that question!



http://www.mouser.com/ProductDetail/WIMA/MKP1O133306F00KYSD/?qs=sGAEpiMZZMv1cc3ydrPrFyY4BahsFf0/Qzy2qHcK3r8=

Do yourself a favor and buy several of them!

Best regards
HP

PS I apologize for cursory nature of this post -- Know also that I am absolutely sincere in my offer of further details upon request

As for me, I am perpetually incapacitated by Aleph(0)'s unspeakable pulchritude. *sigh*

 

HP, @theodoravain was asking me abt old indoor TV antenna...

@theodoravain may jolly well make her inquiries for herself! --- Whereupon I will be delighted to offer a considered reply --up to and including a 'treatise' upon antenna theory-- if so desired!

HP I say main thing is we need structured, assignment-based SYSTEM cuz like FEMA PSA says _winging it isn't a plan_
!

Good deal! -- Might we be privy to the details of your proposed 'plan of action', as it were?

my call is to continue!

Be it known that such represents my genuine desire as well...

As for me, I am perpetually incapacitated by Aleph(0)'s unspeakable pulchritude. *sigh*

Oh my! Seems @Aleph(0) has her own 'JC'? -- Heaven grant he doesn't --in like fashion-- adorn @cmartinez's photo thread with her real image --- But then 'unspeakable' is seldom - and, I'm bound to opine, rather curiously, applied to affirmation Hmm....

Best regards
HP