I plan to fiddle around with linear power supplies in the near future and looked for a variable transformer for that purpose.
Most economic way would have been to buy a galvanic separated 240V variac and have all voltages in one box.
But that would not be TEA style.
So I found this beautiful Ruhrstrat 0-25V / 10A one, built 1981.
(....)As beautiful as it is inside, I probably would change that Selenium rectifier. Aside from sparing you the Stench when it cooks off, it would also lower output impedance and increase max voltage a bit, while lowering waste heat inside the case...Gleich riecht er!
https://www.science.org/content/blog-post/things-i-won-t-work-chalcogen-polyazides
The experimental section of the paper enjoins the reader to wear a face shield, leather suit, and ear plugs, to work behind all sorts of blast shields, and to use Teflon and stainless steel apparatus so as to minimize shrapnel. Hmm. Ranking my equipment in terms of its shrapneliferousness is not something that's ever occurred to me, I have to say. It's safe to assume that any procedure which involves considering which parts of the apparatus I'd prefer to have flying past me will not get much business in my lab, no matter how dashing I might look in a leather suit.
Isn't it nice when the seller even posts a picture of the cracked RIFA in the sale information: https://www.ebay.de/itm/194782816280
Ah yes, Mr Lowe. Recommended.
If you want to see other such droll posts, then (slightly strangely) use https://www.science.org/topic/blog-category/things-i-wont-work-withQuoteThe experimental section of the paper enjoins the reader to wear a face shield, leather suit, and ear plugs, to work behind all sorts of blast shields, and to use Teflon and stainless steel apparatus so as to minimize shrapnel. Hmm. Ranking my equipment in terms of its shrapneliferousness is not something that's ever occurred to me, I have to say. It's safe to assume that any procedure which involves considering which parts of the apparatus I'd prefer to have flying past me will not get much business in my lab, no matter how dashing I might look in a leather suit.
Isn't it nice when the seller even posts a picture of the cracked RIFA in the sale information: https://www.ebay.de/itm/194782816280
Less so the leaked SMD caps and test failures. But he gets excellent bonus points for honesty!
My bnc dust cap supply went dry.
But I found these ones on thingverse:
https://www.thingiverse.com/thing:1778219
Just printed a bunch of them.
Pat, I tried to verify that hot spot you are seeing in the A Sweep/Trigger circuit but mine is wired differently. This is an early S/N with a detachable line cord. I assume yours is probably a later S/N with a fixed line cord like my other two with the HV issues. Later this week I'm pulling out the one that still has the 5642 HV rectifiers in it to verify that the HV transformer is FUBAR. At that time I'll look and see if it's the same as yours and if yes I'll check to see if the same result as you are seeing.
My bnc dust cap supply went dry.
But I found these ones on thingverse:
https://www.thingiverse.com/thing:1778219
Just printed a bunch of them.
Oh no ... I checked the model and they do twist on. Now I know what I'll be printing today in appropriate colors.
Pat, I tried to verify that hot spot you are seeing in the A Sweep/Trigger circuit but mine is wired differently. This is an early S/N with a detachable line cord. I assume yours is probably a later S/N with a fixed line cord like my other two with the HV issues. Later this week I'm pulling out the one that still has the 5642 HV rectifiers in it to verify that the HV transformer is FUBAR. At that time I'll look and see if it's the same as yours and if yes I'll check to see if the same result as you are seeing.
Yes, mine is a later one - the easily visible 6AU8s have 68-XX date codes on them, and the serial number is 012731, so it's just a bit past the 6739/6740 S/N transition point in the manual.
I've moved it up to my main bench now that I've finished the work project that had been occupying it and have gotten a better look - had to remove the feet and lifting straps, and need to relocate my under - bench - shelf strip lighting to get a quarter inch of clearance to get it in there. I did find one cracked 6DJ8 ( ), but it's in the Alternate Sweep Switching circuit (V494), so I don't think it's causing the heating issue. I'll put a new one in regardless, but need to find my stash. Also want to rig up a higher-power voltage/current metered variac to test it further - my Sencore Powerite II is only rated for 3 A continuous and 4 A intermittent, so I was running it on the ragged edge pulling hair over 4 A with the 547 the other night.
Dead tube, tight squeeze:
Wish the bench shelf was two inches higher - would then be able to fit the scope on the lazy susan to make it easier to work on.
-Pat
You don't know what it installs.
We've lost control when MFM controller was left behind.
BTW,
Palmtronic and RAD results 1, DEG is a bit under, w/o tan() it's a bit over and w/o cos() it's 1.
BTW2,
my poor P-touch 500 doesn't even have a display.
I do because I've dumped and inspected the entire contents of the virtual drive and also connected it to a Linux machine where I can fully monitor what the USB connection is doing. It doesn't install anything.
McBryce.
They(them) will secretly inject those legit files.
And export bogus empty space.
Your disk tracks have sectors and sectors and those other sectors are reallocation zones.
So when sector is bad it is reallocated and LBA doesn't change but physical place is different.
The disk can also reallocate for what ever secret purposes it want.
It can also use unused space how ever it see fit.
So when disk is nearly full they say it has troubles but why.
Obviously because it must relocate all the spy stuff.
So that's how they did it in the last century! Neither my PC nor the label printer has disks or sectors. They're completely solid state. Or are you telling me that you don't use USB sticks for fear that the manufacturer will install spyware? How can you use a PC at all with that view?
McBryce.
You can save tape by typing in more than one label title in at a time. Like the "FUSES" label. Type it in and then add more label titles like this -
FUSES RESISTORS CAPACITORS
Put spaces between words (maybe 8 - 10 spaces) and then print it all out at once. Then cut between the label titles with scissors. Then you won't have all that waste at the front and back of each label.
I use continuous printing or words to that effect in the Brother PC software to avoid the leading and trailing waste.
Also, for that bug with the posting images display corruption, it is a known thing (I thought it was resolved?) AFAIK the easy work around is to not use the first slot when uploading images, start from the second slot and then upload as usual.
You don't know what it installs.
We've lost control when MFM controller was left behind.
BTW,
Palmtronic and RAD results 1, DEG is a bit under, w/o tan() it's a bit over and w/o cos() it's 1.
BTW2,
my poor P-touch 500 doesn't even have a display.
I do because I've dumped and inspected the entire contents of the virtual drive and also connected it to a Linux machine where I can fully monitor what the USB connection is doing. It doesn't install anything.
McBryce.
They(them) will secretly inject those legit files.
And export bogus empty space.
Your disk tracks have sectors and sectors and those other sectors are reallocation zones.
So when sector is bad it is reallocated and LBA doesn't change but physical place is different.
The disk can also reallocate for what ever secret purposes it want.
It can also use unused space how ever it see fit.
So when disk is nearly full they say it has troubles but why.
Obviously because it must relocate all the spy stuff.
So that's how they did it in the last century! Neither my PC nor the label printer has disks or sectors. They're completely solid state. Or are you telling me that you don't use USB sticks for fear that the manufacturer will install spyware? How can you use a PC at all with that view?
McBryce.
But those solids are still using blocks and FATs and what not.
Man, they are emulating.
And you don't even know how much space it really has or what it has inside of inside, like those secret chip in board things.
You don't know what it installs.
We've lost control when MFM controller was left behind.
BTW,
Palmtronic and RAD results 1, DEG is a bit under, w/o tan() it's a bit over and w/o cos() it's 1.
BTW2,
my poor P-touch 500 doesn't even have a display.
I do because I've dumped and inspected the entire contents of the virtual drive and also connected it to a Linux machine where I can fully monitor what the USB connection is doing. It doesn't install anything.
McBryce.
They(them) will secretly inject those legit files.
And export bogus empty space.
Your disk tracks have sectors and sectors and those other sectors are reallocation zones.
So when sector is bad it is reallocated and LBA doesn't change but physical place is different.
The disk can also reallocate for what ever secret purposes it want.
It can also use unused space how ever it see fit.
So when disk is nearly full they say it has troubles but why.
Obviously because it must relocate all the spy stuff.
So that's how they did it in the last century! Neither my PC nor the label printer has disks or sectors. They're completely solid state. Or are you telling me that you don't use USB sticks for fear that the manufacturer will install spyware? How can you use a PC at all with that view?
McBryce.
But those solids are still using blocks and FATs and what not.
Man, they are emulating.
And you don't even know how much space it really has or what it has inside of inside, like those secret chip in board things.
OK I am back from the offcie supplies store, got a tape printer.
I got fooled, stupid me... I checked the web site of that store thinking they wold have everything in stock... but nope.
The cheaper printers I was targeting, around 30/35 Euros, had to be ordered ! No stock in the store !
I didn't want to wait, I want some labeling action right now, not in 3 or 5 days.
So out with the Brother D210... instead I got, for 20 Euros more, 55 Euros total. a Brother D400.
Thermal transfer on laminated tape like the D210, so it's good, but it looks much better. Hated the black and faux carbon fiber treatment of the D210
D400 is white, looks so much better, more appeasing to the eye, and brightens up the lab.
Also has a better LCD screen so you can better see what the label will look like.
Also has a wider form factor, which allow for a better keyboard, with more keys, more intuitive to use.
Proper intuitive scroll down menu system, navigation keys and Esc/OK button cluster at the right, it's a joy to use, it's like a little baby computer of back in the day, an early word processing machine or something.
K/B is rubbery, feels nice to the touch, quiet to use, lovely.
Good build quality.
Also can do wider tapes as well, not just 6/9/12mm. It can also do 18mm ! It's quite big... comes with an 18mm tape, so bought 12 and 9mm tapes to make sure I could get something that works for the drawer fronts.
However not yet expensive enough to enjoy a USB connector to download custom graphics, oh well.... was not really an essential feature was it
Does have lots of built-in icons/ cliparts though, including a dozen EE related ones believe it or not... there are ground and earth symbols, AC, DC, filament lamp, fuse, stuff like that.
Lots of nice looking fonts too, 13 total IIRC.
It's really a lovely bit of kit, I am very happy I bought it, worth the money.
I see it as an investment... it's gear, that I need and will be useful.. it's not like I wasted 55 Euros on petrol to drive the car around aimlessly, or to buy alcohol or cigarettes or shit like that
Obviously I would prefer to be like some here, that get printers for free ! Failing that, I am OK coughing 55 Euros for that one, it's good vale for money to me.
OK so let's get printing then !
EDIT : looks like the forum is having trouble with the pic thumbnails... the one for the first pic depicts a picture I posted yesterday ! But if you click on it, you do get the correct picture... it's only the thumbnail itself that is corrupt.
EDIT #2 ; I spoke too soon ! I reloaded the page and now BOTH the thumbnail AND the full size pic are corrupt ?!
EDIT #3 : I re-uploaded the troublesome pic... seems to work now, the forum behaves... for how long I don't know, crossing fingers !
You can save tape by typing in more than one label title in at a time. Like the "FUSES" label. Type it in and then add more label titles like this -
FUSES RESISTORS CAPACITORS
Put spaces between words (maybe 8 - 10 spaces) and then print it all out at once. Then cut between the label titles with scissors. Then you won't have all that waste at the front and back of each label.
Yeah but I do want some "wasted" space.. I mean I want all the lable to be the same width, the width of the drawer fronts, regardless of how long the character strings are for a given label.... just a bit of OCD there I admit ! It would look all over shop and untidy to me if the labels were all different sizes and didn't match perfectly the drawer width. OK think what you want of my OCD...
You can save tape by typing in more than one label title in at a time. Like the "FUSES" label. Type it in and then add more label titles like this -
FUSES RESISTORS CAPACITORS
Put spaces between words (maybe 8 - 10 spaces) and then print it all out at once. Then cut between the label titles with scissors. Then you won't have all that waste at the front and back of each label.
Yeah but I do want some "wasted" space.. I mean I want all the lable to be the same width, the width of the drawer fronts, regardless of how long the character strings are for a given label.... just a bit of OCD there I admit ! It would look all over shop and untidy to me if the labels were all different sizes and didn't match perfectly the drawer width. OK think what you want of my OCD...
Vince you're hopeless ...
Well, so am I.
Tonight's work: Removing all the nasty, crappy Texas Instruments IC sockets from my Tek SG503 Levelled Sine Wave Generator and replacing them with nice gold plated turret sockets.
I also found a bunch of the TI IC's had corroded through the plating on their legs and had started to rust the metal underneath, a couple has legs that were barely holding on...
Seems TI didn't really have a good run for a while there...
Tonight's work: Removing all the nasty, crappy Texas Instruments IC sockets from my Tek SG503 Levelled Sine Wave Generator and replacing them with nice gold plated turret sockets.
I also found a bunch of the TI IC's had corroded through the plating on their legs and had started to rust the metal underneath, a couple has legs that were barely holding on...
Seems TI didn't really have a good run for a while there...
So tomorrow it's off to Akihabara to find some new chips on the way in to work.
You don't know what it installs.
We've lost control when MFM controller was left behind.
BTW,
Palmtronic and RAD results 1, DEG is a bit under, w/o tan() it's a bit over and w/o cos() it's 1.
BTW2,
my poor P-touch 500 doesn't even have a display.
I do because I've dumped and inspected the entire contents of the virtual drive and also connected it to a Linux machine where I can fully monitor what the USB connection is doing. It doesn't install anything.
McBryce.
They(them) will secretly inject those legit files.
And export bogus empty space.
Your disk tracks have sectors and sectors and those other sectors are reallocation zones.
So when sector is bad it is reallocated and LBA doesn't change but physical place is different.
The disk can also reallocate for what ever secret purposes it want.
It can also use unused space how ever it see fit.
So when disk is nearly full they say it has troubles but why.
Obviously because it must relocate all the spy stuff.
So that's how they did it in the last century! Neither my PC nor the label printer has disks or sectors. They're completely solid state. Or are you telling me that you don't use USB sticks for fear that the manufacturer will install spyware? How can you use a PC at all with that view?
McBryce.
But those solids are still using blocks and FATs and what not.
Man, they are emulating.
And you don't even know how much space it really has or what it has inside of inside, like those secret chip in board things.
Wow, you're really on the paranoid juice. So how do you use a computer at all? They could hide spyware anywhere and you wouldn't know it! Anything that can save executable data is a threat? USB Sticks, printers, scanners, webcams? Even a mouse or keyboard via USB is a threat if you use that logic.
Sad story time: I had a similar discussion recently with someone who had read that webcams could be activated by hackers etc, etc and wanted me to check if his computer had been infected by such viruses. I entered his livingroom to find an Alexa sitting right in the middle of the room. Why bother with spyware/virus scanners on a PC at all, when you are willing to pay for a spying device right in the middle of your livingroom? Case closed.
McBryce.
Just added tinfoil to the shopping list, my old hat wearing out.
https://www.science.org/content/blog-post/things-i-won-t-work-chalcogen-polyazides
Yea, the S/N of the one I checked today is B002646 so it's an early one. The other two are S/N B008570 and B010425 so they should match yours.
If you need a 6DJ8 let me know.