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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
By Harvey White · #150092 ·
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
By Raymond Domp Frank · #150091 ·
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
By machineguy59 · #150090 ·
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
By Nenad Filipovic · #150089 ·
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
By EricJ · #150088 ·
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
By Michael A. Terrell · #150087 ·
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.
By Chuck Harris <cfharris@...> · #150086 ·
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
By Chuck Harris <cfharris@...> · #150085 ·
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
By satbeginner · #150084 ·
Re: recapping 2445A - this did not go well
Wasn't this Power Supply known for wrong PCB markings for at least one Cap? Raymond
By Raymond Domp Frank · #150083 ·
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
By Ed Breya · #150082 ·
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
By n4buq · #150081 ·
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
By marc.nijssen@... · #150080 ·
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
By Ke-Fong Lin · #150079 ·
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
By stefan_trethan <stefan_trethan@...> · #150078 ·
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
By Kevin Clark · #150077 ·
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.
By Harvey White · #150076 ·
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
By Harvey White · #150075 ·
Re: Wow Radio Shack desoldering Iron Best review ever, Re: [TekScopes] 466-464 stray wire
Even if you can adjust the temperature, it's not much use. The danger of lifting pads increases exponentially with temperature and a hot setting can not really make up for a decent thermal path and
By stefan_trethan <stefan_trethan@...> · #150074 ·
Re: Wow Radio Shack desoldering Iron Best review ever, Re: [TekScopes] 466-464 stray wire
I can adjust temp on mine, what should it be at? Thanks Kevin Thanks Kevin
By Kevin Clark · #150073 ·