Re: recapping 2445A - this did not go well
Raymond,I have seen this happen several times, so many times I remember the number designations without looking them up.? But I make mistakes, so I look them up anyway.? I wish there was a way to
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machineguy59
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#150094
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Re: Wow Radio Shack desoldering Iron Best review ever, Re: [TekScopes] 466-464 stray wire
I have had that same Metcal MX desoldering system for years, and I found that being connected with a fairly long air hose (25 feet?) limited the air pressure available to the desoldering gun used to
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tom jobe <tomjobe@...>
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#150093
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Re: recapping 2445A - this did not go well
Had one, not sure why, since it was a LONG time ago, explode. Seriously, two little wires and aluminum confetti all over the lab. Decided at that point to avoid selenium rectifier voltage supplies
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Harvey White
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#150092
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Re: recapping 2445A - this did not go well
Hi Ron, Glad that you remembered and took the effort to describe the details. This time, I'll store them where I can find them... Raymond
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Raymond Domp Frank
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#150091
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Re: recapping 2445A - this did not go well
Its likely that you did nothing wrong and the fix is easy.? First, the markings for C1115 and C1132 are mixed up in all Tektronix documentation.? You almost certainly put C1115 (a 35 to 60 volts
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machineguy59
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#150090
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7L5 early version (SN below B069999) Mod FB for 7854 compatibility
Hi Everybody, Chance had it that most of the time I spent on my 7L5 went into fixing, calibrating, adapting... rather than actual use. But this is about to change as I'm (hopefully) done with all the
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Nenad Filipovic
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#150089
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Re: Wow Radio Shack desoldering Iron Best review ever, Re: [TekScopes] 466-464 stray wire
Yes, the good venturi models have much better suction (high volume) and it's instant. I've got a Metcal MX-DS1, it's awesome. Totally agree on the rest of your points also. Clogged nozzles will make
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EricJ
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#150088
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Re: Wow Radio Shack desoldering Iron Best review ever, Re: [TekScopes] 466-464 stray wire
I couldn't get tips for soldering irons while stationed at a remote army base, so I asked the base engineers for some scrap brass welding rod pieces the right size. I borrowed a die, to thread the
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Michael A. Terrell
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#150087
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Re: recapping 2445A - this did not go well
It would be relatively foolish to remove all of the capacitors before putting them back. I recap 2465 supplies a lot for my customers, and I still remove/replace them in blocks of all the same type.
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Chuck Harris <cfharris@...>
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#150086
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Re: recapping 2445A - this did not go well
When recapping the 2465 family power supplies, you will find that all of the electrolytic capacitors are oriented so that their polarity markers point in the same direction. The only possible
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Chuck Harris <cfharris@...>
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#150085
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Re: recapping 2445A - this did not go well
If the 2445 has the same ps as the 2465 than C1115 and C1113 are mixed-up in the component layout..... There are threads about this somewhere. Un saludo, Leo
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satbeginner
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#150084
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Re: recapping 2445A - this did not go well
Wasn't this Power Supply known for wrong PCB markings for at least one Cap? Raymond
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Raymond Domp Frank
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#150083
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Re: recapping 2445A - this did not go well
I'd be inclined to go with what Barry said - it's fairly easy to inadvertently put a two-leaded cap in backwards, which would cause immediate failure on power-up. I'm sure it's happened to all of us
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Ed Breya
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#150082
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Re: recapping 2445A - this did not go well
Hi Marc, Sorry to hear about the exploding cap. Any chance it was installed backwards (polarity-wise)? Thanks, Barry - N4BUQ
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n4buq
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#150081
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recapping 2445A - this did not go well
Hi group, hope you don't mind a newbie question. I took the plunge and decided to recap my 2445A power supply. Ordered Rubycons but the first thing I noticed that the caps are all very much smaller
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marc.nijssen@...
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#150080
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Re: Soviet sampling system, and more
Hi Chris, Being a CIA or NSA technical intelligence during cold war, would have been a great job for you :) Please keep us updated, especially with photos and documentations. I'm really curious about
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Ke-Fong Lin
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#150079
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Re: Wow Radio Shack desoldering Iron Best review ever, Re: [TekScopes] 466-464 stray wire
It's easy. You take the cartridge heater technology that JBC and Hakko have and put that around a desoldering tip. http://dangerousprototypes.com/forum/download/file.php?id=11012&mode=view (just make
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stefan_trethan <stefan_trethan@...>
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#150078
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Re: Wow Radio Shack desoldering Iron Best review ever, Re: [TekScopes] 466-464 stray wire
Ok thanks, normal joints are ok at about 300 Deg c but I¡¯ve tried up to 360 for something with a plane but it¡¯s difficult always seems cold Thanks Kevin
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Kevin Clark
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#150077
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Re: Wow Radio Shack desoldering Iron Best review ever, Re: [TekScopes] 466-464 stray wire
How would you modify the existing tools? Harvey One reason why I favor the metcal shaped tips for desoldering where possible. H.
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Harvey White
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#150076
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Re: Wow Radio Shack desoldering Iron Best review ever, Re: [TekScopes] 466-464 stray wire
I'd put it above the melting point of the solder, but not too much more. The joint needs to be hot enough to melt the solder, but that's more a matter of heat capacity than temperature. You'd have to
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Harvey White
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#150075
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