Wow, think I found an interesting one here !
Just starting on sorting 60 or so DIL8 packages here.
I found an IL300-F ... an opto-coupler. OK no big deal but... that's no ordinary photo-coupler, look at the datasheet, that's one hell of a fancy one !
Just search this forum for IL300 for quite a lot of information on this device. I use it all the time for isolating audio. See schematic with some real data.:
(Attachment Link)
Now I think or it, one big advantage of punches is that you can make any shape you want, not just round holes... so it opens up an entire new world of possibilities
You could make a hole with a flat, to fit pots and keep them from spinning round and round, or anything... as long as someone somewhere sells the shape that you want...
They used to be quite common - you could get punches for the classic potentiometer with flat, D connectors, IEC inlets, and so on. Last time I bought some sheet metal punches the ones for anything other than purely round and rectangular holes seemed to have disappeared off the lists of the moderately priced manufacturers and I didn't look at the extortionately priced ones.
Made obsolete in industry by laser cutting and CNC routing.
I've bought a 2mm laser cut panel with D shaped holes for less than a blank panel by the equipment case OEM
Geez, I take a day out (Sunday) to attend an air show and when I get back I find you guys have generated 5 whole pages of input to wade through . Air show was OK but could have been better, the best part of an hour just to gain entrance to the show ground caused by bad event planning Flying started at 14:00, so we had 5 hours to kill before the display and all the time the sun was shining nicely. Just after the show started, it became very overcast with black storm clouds photography became a waste of time, then it started to rain, so we went and sat in the car and watched the Grand Prix on the car's inbuilt TV. The Grand prix was just 30 mile west of our location, and they had a beautiful but drama filled day.
Now I think or it, one big advantage of punches is that you can make any shape you want, not just round holes... so it opens up an entire new world of possibilities
You could make a hole with a flat, to fit pots and keep them from spinning round and round, or anything... as long as someone somewhere sells the shape that you want...
They used to be quite common - you could get punches for the classic potentiometer with flat, D connectors, IEC inlets, and so on. Last time I bought some sheet metal punches the ones for anything other than purely round and rectangular holes seemed to have disappeared off the lists of the moderately priced manufacturers and I didn't look at the extortionately priced ones.
Made obsolete in industry by laser cutting and CNC routing.
I've bought a 2mm laser cut panel with D shaped holes for less than a blank panel by the equipment case OEM
Ah yeah, laser cutting... but I hope prices have come down at least, at least an order of magnitude for x1 quantities / prototype since I last looked 15 years ago, where some German company wanted 100 Euros for a small piece of sheet aluminium with a square cut in it for an LCD, and a couple holes for knobs, forthe project I was working on... and they dared bragging about how "affordable" they were, at that !
Depends how many posts people deleted
Revisionist bastards!Oh right, and you haven't played that game...... how's your halo hanging these days ?
Now I think or it, one big advantage of punches is that you can make any shape you want, not just round holes... so it opens up an entire new world of possibilities
You could make a hole with a flat, to fit pots and keep them from spinning round and round, or anything... as long as someone somewhere sells the shape that you want...
They used to be quite common - you could get punches for the classic potentiometer with flat, D connectors, IEC inlets, and so on. Last time I bought some sheet metal punches the ones for anything other than purely round and rectangular holes seemed to have disappeared off the lists of the moderately priced manufacturers and I didn't look at the extortionately priced ones.
Made obsolete in industry by laser cutting and CNC routing.
I've bought a 2mm laser cut panel with D shaped holes for less than a blank panel by the equipment case OEM
Ah yeah, laser cutting... but I hope prices have come down at least, at least an order of magnitude for x1 quantities / prototype since I last looked 15 years ago, where some German company wanted 100 Euros for a small piece of sheet aluminium with a square cut in it for an LCD, and a couple holes for knobs, forthe project I was working on... and they dared bragging about how "affordable" they were, at that !
Imagine you were employed at this company and working at this laser cutter station and want to get paid good money for your work ...
Also, this was 15 years ago, Laser cutters were much more expensive and not so sophisticated as they are nowadays.
Now I think or it, one big advantage of punches is that you can make any shape you want, not just round holes... so it opens up an entire new world of possibilities
You could make a hole with a flat, to fit pots and keep them from spinning round and round, or anything... as long as someone somewhere sells the shape that you want...
They used to be quite common - you could get punches for the classic potentiometer with flat, D connectors, IEC inlets, and so on. Last time I bought some sheet metal punches the ones for anything other than purely round and rectangular holes seemed to have disappeared off the lists of the moderately priced manufacturers and I didn't look at the extortionately priced ones.
Made obsolete in industry by laser cutting and CNC routing.
I've bought a 2mm laser cut panel with D shaped holes for less than a blank panel by the equipment case OEM
Ah yeah, laser cutting... but I hope prices have come down at least, at least an order of magnitude for x1 quantities / prototype since I last looked 15 years ago, where some German company wanted 100 Euros for a small piece of sheet aluminium with a square cut in it for an LCD, and a couple holes for knobs, forthe project I was working on... and they dared bragging about how "affordable" they were, at that !
took a few years, but my addiction won
WELCOME TO 5000!
...
I think this is probably a good point to call it a night. mnem
Hi Dwagon, Did you see my posts
https://www.eevblog.com/forum/testgear/test-equipment-anonymous-(tea)-group-therapy-thread/msg4275517/#msg4275517
and
https://www.eevblog.com/forum/testgear/test-equipment-anonymous-(tea)-group-therapy-thread/msg4275556/#msg4275556
Looks like same video scheme as the 892x series a Gondbes 8220 video converter would be my next stop.
Yup, sure did; and followed that rabbit-hole down to that LCD mod. Very tidy!
Problem is that the models we have tech ref on... the ones we've been talking about... are all proper non-greyscale monochrome monitors. Also, this family of monitors are all "1000 line" resolution (IIRC, I read that they "use" ~960 lines), so not too sanguine aboot dropping down to 800x600 resolution.
There's a CDM-7SX191 monitor on eBay right now for $80... I've been meaning to get into one of these Chinesium video scan converters as a diag tool for a while, so that might still happen... but I think that if I were going to fix this scope, I'd prolly bite the bullet and buy that monitor.
This of course is all dependent on how my dispute resolves out. I wanted to spend a little time tinkering just to see if there were signs of life; I was hoping it might be easy to mod the CDM-7SF191 I have in that 54600A so it thinks it's a CDM-7SX191.
I may instead try remoting into it over the RS-232 instead... in which case I'll soon be hunting down that software you posted and firing up the old WinXP Toughbook.
mnem
More CRT types needed.
54600A Pixel_data and Marker_dots are already 32 levels internally, but only 2nd and 4th of Pixel_data are used externally.
So taking out all five is pretty simple but the situation should also be very clearly visible in the monitor.
Old Intensity reference pot can grant its pins.
54600A Pixel_data goes through U37 74LS194 and then HB goes to U30 74ALS08, FB does the same but first ORing Marker_dots in U31 74F32, so either will do a final FB.
All gates are used so extra chip must be added, no idea when the device is designed but 5 TTL monitor pins feels a bit too much.
nixiefreqq's neck board has 1 FET and 3 BJTs, I'd say that 5 TTL pins are not there.
Since 74S03 is the earlier model my guess is that later monitors became better and external data level reference was not needed anymore.
So comparing two datalines will tell how the situation is.
Testing with an extra *old* computer monitor should also be pretty easy, if one is available.
One gate chip is needed, old display modes were selected by swapping sync polarities.
Using only green as data is also fine.
Functional monitor is not needed if vertical line movement is possible, since its color value is different it should be very visible.
Maybe duplicating buttons of two side by side machines can do settings.
Resolution
255 V x 500 H 54600B
256 V x 500 H 54615B
54620-series
255 vertical by 1000 horizontal points (waveform area)
32 levels of gray scale
Is it really 1000 pixels?
Vertical is the same as before so monitor is probably also pretty same as before.
I tried to find some tube info but everything was too old.
So no real idea of physical resolution of those 7" mono tubes.
But it can be checked, just compare those old and new 546xx horizontal lines, 1000 res has half the pixel length.
If shorter pixel length is there then different CRT must be also present, if that is the key.
It is entirely possible I misremembered the line count on this monitor and conflated the numbers with those above. We know that the 54645A is using a PAL combi chip, so up to 625 lines (I can't remember if that's interlaced or not) to play with; so yeah, I can see those numbers being legit.
54645A and 54600A both use the same DataRay CDM-7SF191 part number. I've attached some pics. The main and CRT PCBs appear identical, even though the older CDM-7SF191 in my 54600A uses a Panasonic M18JCB34GH CRT vs the Toshiba E9054B31-CDHT CRT in my 54645A. That Toshiba CRT, however, is the same as the in the 54621D, so the CRTs in all 3 models must be interchangeable?
I'm thinking now that my original surmise is correct... provided nothing wrong with the mainboard, we should be able to get something useful on the screen with the 54621D and the CDM-7SF191 from my 54600A. Just need to see how they're modulating the brightness to get those greyscales. I guess my next step will be a breakout PCB.
For now, tho, I've had to put it away; wifey has requested I look at the AC in our old Saturn.
mnem
Now I think or it, one big advantage of punches is that you can make any shape you want, not just round holes... so it opens up an entire new world of possibilities
You could make a hole with a flat, to fit pots and keep them from spinning round and round, or anything... as long as someone somewhere sells the shape that you want...
They used to be quite common - you could get punches for the classic potentiometer with flat, D connectors, IEC inlets, and so on. Last time I bought some sheet metal punches the ones for anything other than purely round and rectangular holes seemed to have disappeared off the lists of the moderately priced manufacturers and I didn't look at the extortionately priced ones.
Made obsolete in industry by laser cutting and CNC routing.
I've bought a 2mm laser cut panel with D shaped holes for less than a blank panel by the equipment case OEM
Ah yeah, laser cutting... but I hope prices have come down at least, at least an order of magnitude for x1 quantities / prototype since I last looked 15 years ago, where some German company wanted 100 Euros for a small piece of sheet aluminium with a square cut in it for an LCD, and a couple holes for knobs, forthe project I was working on... and they dared bragging about how "affordable" they were, at that !For the life of me I couldn't imagine chassis punches were obsolete so fished out an old Farnell catalogue and there they were under Hole Punches !
Take your pick:
https://nz.element14.com/c/tools-production-supplies/tools-hand-workholding/punch-tools/prl/results/2?st=hole%20punch
https://nz.rs-online.com/web/c/hand-tools/measuring-marking/punch-die-kits/?pn=1&searchTerm=Hole+punch
Nobody said they were cheap.
[..]
Well my options were:
1. Trying to drive wonky GP-IB cables and devices from Visual Basic through a hooky ISA card that only worked with 16-bit windows so I had to write drivers for NT for it in a room with no natural light other than 30 minutes at lunch time as it was dark in the morning and dark in the evening. The only break being writing CoCreate workmanager's mutant version of BASIC that sort of half ran on Solaris and half on Windows. Or munging bits of Perl on a manky Ultra 2 desperately trying to replace an S390 batch job before they had to pay IBM another vat of kidneys.
2. Get paid 3x that for a trendy job at a web app startup which involved doing 2 hours of work a day in a swanky well lit windowed office in the city and spend the rest of the time pissing around, getting drunk after work and getting into the more interesting kinds of trouble
I chose well
I can make any hole with a step drill and a beer
Disclaimer: may not be straight or in the right place.
[img width=6°°]https://www.eevblog.com/forum/testgear/test-equipment-anonymous-(tea)-group-therapy-thread/?action=dlattach;attach=1528393;image[/img]Boy, do I loooooveee hole punches, waayyy better than nasty holesaws.
I don't understand... must have misread your previous post... though this amp was just a very vague long term project... and now you present us with a chassis... could you have been lying to us.... no, you would not do that.
Looks very clean/professional indeed... but what machine did you use that had enough force to punch through that metal, smoothly, i a controlled manner ? Surely a flick of a hammer won't do it... do you have a press ? That would be to just as interesting to see as the resulting holes... because I sure am interested as well.... links/costs etc....
Ha, I used a sheet metal punch, to cut the holes in a chassis I've had ready and waiting for a while.
Wow a simple screw is enough for the job and get that clean a result ?!
That's great !
No need for a bulky expensive press than... hmm .... how appealing....
Depends how many posts people deleted
Revisionist bastards!Oh right, and you haven't played that game...... how's your halo hanging these days ?
Oh I buried that halo 40 years ago
mnem
What... is it crooked again...?
New video with all digits operational:
-Pat
Now I think or it, one big advantage of punches is that you can make any shape you want, not just round holes... so it opens up an entire new world of possibilities
You could make a hole with a flat, to fit pots and keep them from spinning round and round, or anything... as long as someone somewhere sells the shape that you want...
They used to be quite common - you could get punches for the classic potentiometer with flat, D connectors, IEC inlets, and so on. Last time I bought some sheet metal punches the ones for anything other than purely round and rectangular holes seemed to have disappeared off the lists of the moderately priced manufacturers and I didn't look at the extortionately priced ones.
Made obsolete in industry by laser cutting and CNC routing.
I've bought a 2mm laser cut panel with D shaped holes for less than a blank panel by the equipment case OEM
Ah yeah, laser cutting... but I hope prices have come down at least, at least an order of magnitude for x1 quantities / prototype since I last looked 15 years ago, where some German company wanted 100 Euros for a small piece of sheet aluminium with a square cut in it for an LCD, and a couple holes for knobs, forthe project I was working on... and they dared bragging about how "affordable" they were, at that !For the life of me I couldn't imagine chassis punches were obsolete so fished out an old Farnell catalogue and there they were under Hole Punches !
Take your pick:
https://nz.element14.com/c/tools-production-supplies/tools-hand-workholding/punch-tools/prl/results/2?st=hole%20punch
https://nz.rs-online.com/web/c/hand-tools/measuring-marking/punch-die-kits/?pn=1&searchTerm=Hole+punch
Nobody said they were cheap.
Depends how many posts people deleted
Revisionist bastards!Oh right, and you haven't played that game...... how's your halo hanging these days ?
Oh I buried that halo 40 years ago
mnem
What... is it crooked again...?Its his secret signal to all the available redheads that he is on the prowl again
Now I think or it, one big advantage of punches is that you can make any shape you want, not just round holes... so it opens up an entire new world of possibilities
You could make a hole with a flat, to fit pots and keep them from spinning round and round, or anything... as long as someone somewhere sells the shape that you want...
They used to be quite common - you could get punches for the classic potentiometer with flat, D connectors, IEC inlets, and so on. Last time I bought some sheet metal punches the ones for anything other than purely round and rectangular holes seemed to have disappeared off the lists of the moderately priced manufacturers and I didn't look at the extortionately priced ones.
Made obsolete in industry by laser cutting and CNC routing.
I've bought a 2mm laser cut panel with D shaped holes for less than a blank panel by the equipment case OEM
Ah yeah, laser cutting... but I hope prices have come down at least, at least an order of magnitude for x1 quantities / prototype since I last looked 15 years ago, where some German company wanted 100 Euros for a small piece of sheet aluminium with a square cut in it for an LCD, and a couple holes for knobs, forthe project I was working on... and they dared bragging about how "affordable" they were, at that !For the life of me I couldn't imagine chassis punches were obsolete so fished out an old Farnell catalogue and there they were under Hole Punches !
Take your pick:
https://nz.element14.com/c/tools-production-supplies/tools-hand-workholding/punch-tools/prl/results/2?st=hole%20punch
https://nz.rs-online.com/web/c/hand-tools/measuring-marking/punch-die-kits/?pn=1&searchTerm=Hole+punch
Nobody said they were cheap.Yeah, I think those were "the extortionately priced ones" C was talkin' aboot.
Jeezballs... Especially compared to the prices on that AliEx store.
Even if you only get one hole per punch, still money ahead with the Chinesium ones.
mnem
y'all got me playing with my 54622d ....
y'all got me playing with my 54622d ....
You horrible tease! No pics of the component side, or the main PCB... or the component side of the main PCB...
mnem
*toddles off to polish his wood*
y'all got me playing with my 54622d ....
You horrible tease! No pics of the component side, or the main PCB... or the component side of the main PCB...
mnem
*toddles off to polish his wood*
did that back on page 5002.
things move fast on this thread.
(not great pics. but i am not a camera guy)