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AlanP
Joined: Mar 11, 2014 Posts: 746 Location: New Zealand
Audio files: 41
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Posted: Fri Jun 09, 2017 3:33 pm Post subject:
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Cfish wrote: | Anouther good practice with mains power is after insuring the power is off with a meter, turn your eyes away and short it with an insulated screwdriver. |
When working with valve amps, it's a good idea to solder up a 2W bleeder resistor with alligator clips wired to each end. (I vaguely remember that just shorting it all the time is not good for some component, but I don't recall what.)
Make a habit of the first thing you do when the amp is showing it's guts, is to clip one end of the bleeder onto ground, and the other end onto the HT node, and leave it there until you want to power it up for testing. |
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gabbagabi
Joined: Nov 29, 2008 Posts: 651 Location: Berlin by n8
Audio files: 23
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Posted: Sun Aug 13, 2017 9:27 am Post subject:
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i recently found out that staples are an endless source of bridges for breadboard action,
watch out for coated staples they are not conducting |
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PHOBoS
Joined: Jan 14, 2010 Posts: 5591 Location: Moon Base
Audio files: 705
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gabbagabi
Joined: Nov 29, 2008 Posts: 651 Location: Berlin by n8
Audio files: 23
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Posted: Sat Dec 23, 2017 11:35 am Post subject:
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if u are in the situation of
spending christmas soldering on a remote island
with no elecrtonicshop on spot -
and ur soldertip has gone
to where all soldertips will go one day -
a piece of fix copper wire will do the job
until the next ship will bring u home.
tested with 2,5mm².
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gasboss775
Joined: Jan 02, 2016 Posts: 217 Location: Scotland
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Posted: Sat Dec 23, 2017 1:59 pm Post subject:
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g.gabba wrote: | if u are in the situation of
spending christmas soldering on a remote island
with no elecrtonicshop on spot -
and ur soldertip has gone
to where all soldertips will go one day -
a piece of fix copper wire will do the job
until the next ship will bring u home.
tested with 2,5mm².
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Sounds like the kind of thing I'd have done when I was 15, just to see if it would work! What did you use to power your DIY soldering iron? |
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gasboss775
Joined: Jan 02, 2016 Posts: 217 Location: Scotland
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Posted: Sat Dec 23, 2017 2:06 pm Post subject:
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Probably an obvious tip, but some have said I lack common sense...
When soldering onto a PCB or onto a pot or jack, etc make sure the object is secure prior to commencing soldering, otherwise the result could be quite messy
PHOBoS wrote: | when you drill a hole in a plastic enclosure with a 0.7mm drill bit
don't put your finger behind it. |
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gabbagabi
Joined: Nov 29, 2008 Posts: 651 Location: Berlin by n8
Audio files: 23
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Posted: Sun Dec 24, 2017 1:20 am Post subject:
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no no!
only the tip!
only!
the rest should be prefabricated!
otherwise u risc to feel like him |
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Cfish
Joined: Feb 24, 2016 Posts: 477 Location: Indiana
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Posted: Sun Dec 24, 2017 11:21 am Post subject:
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I have not been on in a while. Ya all have no idea how good it made me feel to see people still posting on this thread.
Merry Christmas everyone. |
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PHOBoS
Joined: Jan 14, 2010 Posts: 5591 Location: Moon Base
Audio files: 705
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gasboss775
Joined: Jan 02, 2016 Posts: 217 Location: Scotland
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Posted: Mon Dec 25, 2017 3:37 am Post subject:
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Seasons greetings all!
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gabbagabi
Joined: Nov 29, 2008 Posts: 651 Location: Berlin by n8
Audio files: 23
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Posted: Mon Dec 25, 2017 11:46 am Post subject:
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merry christmas from summerrainy africa @25°
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gabbagabi
Joined: Nov 29, 2008 Posts: 651 Location: Berlin by n8
Audio files: 23
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Posted: Wed Jan 17, 2018 7:48 am Post subject:
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how to make pcb with Lochmaster
means u could make a stripboarddesign same time a pcb
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Ayab
Joined: Oct 27, 2015 Posts: 180 Location: London, UK
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Posted: Sat Aug 03, 2019 6:00 pm Post subject:
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Am working on a method of using radiator paint to iron a "silkscreen" parts placement image onto diy pcb's
Have had some success but have run into issues with the paint melting into the holes on a board where I put too much paint on
- I will have to drill the paint out of the holes
Am currently frustrated that some of my printed parts placements that were correctly sized (by overlapping on the pcb foil printouts) have changed size (and several even became blank!?) just because I am going from illustrator format to pdf. Going to forget it for now and try another day. |
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Ayab
Joined: Oct 27, 2015 Posts: 180 Location: London, UK
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Posted: Sat Aug 17, 2019 2:02 pm Post subject:
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Laser print onto radiator paint with cheap chinese yellow transfer paper is quite reliable. With the right heat of iron for the right time (short as possible but so the transfer still works - obviously).
The paint sometimes melts into the holes & some have to be drilled out again.
But I really like to have a components guide.
Maybe if I got more used to not having a "silkscreen" on etched boards it would be better. Maybe it saves time. I don't really know but it was kind of fun trying (?!)
And needed longer in tinning solution! All the traces are fine just not showing well in picture if they are not tinned enough.
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gabbagabi
Joined: Nov 29, 2008 Posts: 651 Location: Berlin by n8
Audio files: 23
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Posted: Sun Aug 18, 2019 2:06 am Post subject:
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looks good,
ive never heard about "Laser print onto radiator paint with cheap chinese yellow transfer paper"
is this completly new? or you have some links to read or watch about? |
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Ayab
Joined: Oct 27, 2015 Posts: 180 Location: London, UK
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Posted: Mon Aug 19, 2019 5:47 am Post subject:
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Thanks for the kind words. I did not see it anywhere but was inspired by the acetone transfer method - which is ok but does not always result in a very clear 'silkscreen'.
So I thought white paint on the back of the pcb would help toner transfer to stick and be nice and clear. I tried radiator paint as it should be more heat resistant.
Toner transfer onto radiator paint with just normal laser printer paper was ok but the paper did not rub off so easily. I tried the cheap yellow transfer and it was much better. Make sure you tape the cheap yellow paper onto a sheet of normal laser printer paper as "carrier paper" or it gets caught up in your printer (as I discovered)
(Only drawback is the paint can melt, into some holes, when ironing the transfer on but I reckon it is possible to do it to just avoid melting into holes).
Let me know if you want further details and I am happy to describe the method. It is very easy. |
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AlanP
Joined: Mar 11, 2014 Posts: 746 Location: New Zealand
Audio files: 41
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Posted: Mon Aug 19, 2019 6:31 pm Post subject:
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I've also heard of using shiny magazine paper for toner transfer, too. Probably cheaper, since people usually throw that stuff away. |
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PHOBoS
Joined: Jan 14, 2010 Posts: 5591 Location: Moon Base
Audio files: 705
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Posted: Tue Aug 20, 2019 5:23 am Post subject:
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Magazine paper can work if you get some thick glossy stuff but it can transfer more than you'd like.
The yellow transfer paper is very cheap though, if you are willing to wait for shipping.
Although last time I ordered it they send it folded which is a bit annoying as it's creased now.
Quote: | Make sure you tape the cheap yellow paper onto a sheet of normal laser printer paper as "carrier paper" or it gets caught up in your printer (as I discovered) |
Yep, and use tape that is heat resistant! I prefer painters tape myself. Also only secure it at the (top)side that feeds into the printer.
I usually print it first on paper and then tape the tranfer paper to that print so I know the position and don't have to use a whole sheet. _________________ "My perf, it's full of holes!"
http://phobos.000space.com/
SoundCloud BandCamp MixCloud Stickney Synthyards Captain Collider Twitch YouTube |
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gabbagabi
Joined: Nov 29, 2008 Posts: 651 Location: Berlin by n8
Audio files: 23
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Posted: Tue Aug 20, 2019 9:52 am Post subject:
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phobos the master of perf is even etching his own perfboards?!?! |
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PHOBoS
Joined: Jan 14, 2010 Posts: 5591 Location: Moon Base
Audio files: 705
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Ayab
Joined: Oct 27, 2015 Posts: 180 Location: London, UK
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Posted: Fri Aug 23, 2019 1:41 pm Post subject:
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Now that is a good looking Rings panel right there!
I have tried the glossy paper and agree that using that is probably a better idea. But I had some of the yellow stuff from pcb etching and it works ok. For pcb's I like the blue press and peel although it is a bit expensive. |
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Grumble
Joined: Nov 23, 2015 Posts: 1294 Location: Netherlands
Audio files: 30
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gabbagabi
Joined: Nov 29, 2008 Posts: 651 Location: Berlin by n8
Audio files: 23
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PHOBoS
Joined: Jan 14, 2010 Posts: 5591 Location: Moon Base
Audio files: 705
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Ayab
Joined: Oct 27, 2015 Posts: 180 Location: London, UK
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Posted: Sat Feb 22, 2020 2:27 pm Post subject:
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I use a rubber band doubled over a few times works well.
A rubber band works amazingly well to open difficult jars to (sorry for the girly tip! :oops) |
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