Re: Late 1970s Sprauge Capacitor Markings
I do have a tester, but it also needs work. Was going to do a restoration on it, until I got to the controls where someone greased them and it turned to glue. Kind of threw it on the back burner at that point, degunking the controls is a headache in and of itself.
For now I'll just replace the caps I know are electrolytic for sure. The 25v 22ufs are already leaking so they're the first to go.
What's prompting the repairs anyway?
I already know the vertical adjustment is whack,...
Compgeke
Badcaps Veteran
Last Activity: 07-19-2020, 09:16 AM
Joined: 02-16-2014
Location: Fairfield, CA
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Last edited by Compgeke; 03-22-2020, 12:02 PM. -
Late 1970s Sprauge Capacitor Markings
Good Evening,
I'm working at getting a capacitor list together for my Tektronix 650A monitor but a few of the caps I'm iffy on whether I've decoded the value correctly or not. I'm not too familiar with the old school Sprague or even Tektronix in house markings - not generally my specialty. That's normally old Mac computers
.
I've gotten everything else figured out. Absolutely beautiful build quality as one would expect with a Tektronix .
Anyway, the caps.
Here's #1: 50v 1uf? "1-150DC"
#2: 25v 1uf non... -
Re: best cheap/free scores 1.1
Hit up the flea market yesterday. Came home with:
$10 - 2006 17" 2.16 GHz Core Duo Macbook Pro. Works great, sans battery. That's expected.
$15 - 2007 15" 2.2 GHz Core 2 Duo Macbook Pro. Motherboard seems to be dead, possibly the 8600 GT on it. Not worth the effort of fixing.
$10 - Fluke 73 III. Super greasy, cleaned up nice.
$10 - Axis Q1602 camera with Tamron M13VG288 lens and a Ram mount. Works great.
$5 - Lambda SR35-5 5V 7A PSU. Need to dig into this one, initial test I get a whole nothing from it. Verified...Leave a comment:
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Re: best cheap/free scores 1.1
That era of AVR is pretty nice for a budget 1080p surround setup really. If like me, 4k hasn't made it to your house and you don't use the TV enough to justify upgrading. Super cheap now that everyone's after 4k.
I picked up a Sony STR-DA5300ES for free a couple years back, a $1700 top of the line model back in '07. Not great for music, but pretty damn good when coupled with some decent surround speakers and a 15" home theatre sub.Leave a comment:
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Re: ALI LA 16 - MACOM [RL191 1-b] AT Power Supply
AT&T PC-6300/Olivetti M24/Xerox 6060. Being 110V, it's PC-6300 or Xerox 6060, probably a PC-6300 since those're the far more common one.
A bit of a funky computer design with two boards that connected together through the video card. Bottom of the chassis was the "motherboard" and top the ISA expansions. Even better, it had 16-bit expansion before IBM did. Predates 16-bit ISA, but a few cards were made for the 6300's interface....Leave a comment:
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Re: Power supply build quality pictorial. part 2
Picked up an 8 bay eSATA box and just had to see what was inside. Surprisingly decent looking power supply for a consumer grade box. All the electrolytic capacitors are Chemicon KY capacitors. The X and Y caps are proper safety rated. Well defined clearance (and holes) between the high and low voltage sides.
...Leave a comment:
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Re: Power supply build quality pictorial. part 2
Here's something a bit different than the normal computer PSU, a Motorola\Vesta\who knows who else "Power Module". Designed for a 911 phone system of sorts, it supplies +5V, -48V and -96V at who knows what current.
Wasn't a cheap thing new, the 2005 Motorola catalog advertises it at $2730.
Anyway, onward. It's based on some sort of all in one power modules. Who made them or what they are, I have no idea. I'd have to desolder them to find out and that's too much effort.
...Leave a comment:
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Re: best cheap/free scores 1.1
For the first time in a while, something worthy. Picked up a Mid-2010 Plastic Macbook with the 2.4 GHz Core 2 Duo, 8 gigs ram and a 750 gig HDD for $20 off Craigslist.
No issues other than the lack of a battery and the bottom of the chassis is bowed a bit around the battery area. I assume the original bloated up at some point in the past, Macbooks are great at doing that.
...Leave a comment:
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Re: Say you got a free PSU from outside... and it was raining
If there's no rust\corrosion, just let it dry out and it'll probably be fine. Electronics get washed in the manufacturing process (albeit, cleaner water than rain) but there's not a lot that'll go "bad" from some moisture.Leave a comment:
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Re: best cheap/free scores 1.1
Just been lurking a while but figured this was worthy of a post.
Went thrift store searching today and found myself an HP Z420 for $95. Complete with a Xeon E5-1650 (3.2 GHz, 6C, 12T, 12M Cache), 8 gigs ram, 250 gig HDD, Radeon HD 2400.
CPU alone is worth $95, the rest is a bonus. Also supports ECC ram so it looks like I'm going to up it to 64 gigs and short my mostly unused server some ram.
Also in the cheap/free: 12x 8 GB DDR3 10600R from a friend who was decommissioning servers. 8'll go into this for proper...Leave a comment:
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Re: best cheap/free scores 1.1
12x Samsung 8 gig DDR3 ECC modules for the low low price of free. Someone I know was decommissioning servers at their worksite and got to strip some parts before they went to scrap, part of that was a bunch of ram. [url]http://i.imgur.com/pkmZLKB.png[/url]Re: best cheap/free scores 1.1<br />...m/pkmZLKB.png[Leave a comment:
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HP 6632A Power Supply Fan Silencing Guide
Recently I picked up an HP 6632A quite cheaply, under $75 shipped. The thing works great with the slight exception of the fan being loud, but let's change that.
The factory fan is a 60mm Papst TYP 612. It's a 12V, 24 CFM fan rated for 40dB noise. In addition to all that, the HP has no fan control, full speed all the time.
So, obviously we need something quieter but we don't want to reduce air flow and have it overheat. It should have thermal protection but I don't feel like burning it up to find out if it works.
That's where... -
Re: best cheap/free scores 1.1
Got a PS2 SCPH-30001 with a controller, power cord and the A/V cable for free. Been wanting to get another PS2 for the last 9 years or so, finally did it.Leave a comment:
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Re: Test equipment using variants of the UNIX operating system
A lot of HP logic analyzers and such are based on a PA-RISC processor with a variation of HP-UX running on them. They even often came with additional features\programs on floppy disks you could install to the internal IDE or SCSI hard drive. I believe there's a way to exit out and get to a terminal but I wouldn't know personally, my fanciest gear is Tek and it's proprietary OS.Leave a comment:
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Re: best cheap/free scores 1.1
Stopped at the County Surplus sale and grabbed a $10 Optiplex 780. Core 2 Duo E7500, 4 gigs ram, 250 gig HDD and the original Windows 7 disk.
Also grabbed an Impact Lighting VA903 from a thrift store for $12. Two bulbs are burnt out but it does have the diffuser and reflector. Same light is $190 from B&H Photo.Leave a comment:
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Re: best cheap/free scores 1.1
My brother brought home an GTCO Calcomp Interwrite 1040 board his school was throwing out. Works fine, even has a giant carrying case. Only downside is the thing's tiny and 4:3 meaning it's a pain to get a projector aligned and focused.
[url]http://i.imgur.com/9bqFE8k.jpg[/url]Re: best cheap/free scores 1.1<br />...et a projectorLeave a comment:
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Re: The ghetto mod thread
Figured I might as well update with Revision 2 of the hacked up LC PSU. Works fine and far less sketchy than the original, despite still being sketchy as hell.
...Leave a comment:
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Re: 70's stereo reciever (Monteverdi?) with flaking green ceramic disk capacitors
The hum is just going to be a result of the amp design itself. It's very common on low end amps and such, caps won't fix it....Leave a comment:
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Re: The ghetto mod thread
I don't have the original PSU for my Macintosh LC. Gotta make due with what I've got.
Using an old Antec 300W PSU with some wires shoved in the 20 pin ATX connector. All it needs is ground, +5V, +12V and -5V so it's no problem.
And yes, it works.
Bought a 20 pin extension cable so soon I'll have a far prettier solution than just wires shoved in a connector....Leave a comment:
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Re: best cheap/free scores 1.1
Won a ZTE Z987 (aka Grand X Max+) for $6 at the local county surplus store. Fairly recent 6" Phablet.
While picking that up I grabbed an Optiplex 755 with a 2.93 E8300, 4 gigs ram and HD2400 for $10.Leave a comment:
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