Re: Restoring a VT50 (VT52 actually) .

söndag 24 december 2017 skrev Chuck Guzis via cctalk : > On 12/23/2017 07:24 PM, Chris Elmquist wrote: > > > I’m not sure you can smell the difference between failed selenium > rectifiers and lutefisk... > > It probably doesn't get interesting until you toss in a can of >

Re: Help Identifying Components

On 12/24/2017 10:27 AM, Rob Jarratt via cctalk wrote: > > 1. The component with two wide pins that looks like an IC > approximately in the middle of the board. It is marked M106 (or it might be > AA106) and 91813 underneath. I think it may be a resistor, but I am not > sure. > > 2.

RE: Help Identifying Components

> My guesses are as follows. > > 1. That "AA" or "M" looks to me like a Motorola logo. The fact that this > device > is polarized leads me to suspect that it's a diode. > > 2. I suspect that this thing is a fuse. > > 3. Almost certainly transistors. The center pin is usually the

Re: Help Identifying Components

On 12/24/2017 11:15 AM, Rob Jarratt wrote: > I think the orange components are capacitors (they are taller than the > browner ones), but their markings don't seem to hint at the values, some are > marked "AA4", which does not seem to correspond to any marking scheme I have > been able to find.

Re: Help Identifying Components

If you could wait, getting one of those ‘unknown component testers’ would help you! David Collins > On 25 Dec 2017, at 5:27 am, Rob Jarratt via cctalk > wrote: > > I am continuing work to reverse engineer the schematic for my H7826 PSU. I > have removed one of the

Help Identifying Components

I am continuing work to reverse engineer the schematic for my H7826 PSU. I have removed one of the daughter cards in order to draw its schematic, but I can't identify some of the surface mount components on it. I have posted a picture of it here:

Re: Argh--my old faithful HP16C is failing!

Maybe this got missed. HP16C - PC software http://www.wrpn.emmet-gray.com/ Keven Miller - Original Message - From: "Curious Marc via cctech" To: ; Sent: Sat 23 Dec 2017 10:27 PM Subject: Re: Argh--my old faithful

Re: SM EVM A131-10 advice

On Sun, Dec 24, 2017 at 10:58 AM, Greg Smith via cctalk < cctalk@classiccmp.org> wrote: > Hi, I'm brand new to vintage computing and would love any advice. I'm > thinking of putting together a SM EVM A131-10 and would appreciate any > advice/knowledge on the unit. > Learn to read Russian?

RE: Help Identifying Components

> -Original Message- > From: David Collins [mailto:davidkcolli...@gmail.com] > Sent: 24 December 2017 22:07 > To: r...@jarratt.me.uk; Rob Jarratt ; General > Discussion: On-Topic and Off-Topic Posts > Subject: Re: Help Identifying

Re: Help Identifying Components

On 2017-Dec-24, at 10:27 AM, Rob Jarratt via cctalk wrote: > I am continuing work to reverse engineer the schematic for my H7826 PSU. I > have removed one of the daughter cards in order to draw its schematic, but I > can't identify some of the surface mount components on it. I have posted a >

Re: Help Identifying Components

On 2017-Dec-24, at 12:01 PM, Chuck Guzis via cctalk wrote: > On 12/24/2017 11:15 AM, Rob Jarratt wrote: > >> I think the orange components are capacitors (they are taller than the >> browner ones), but their markings don't seem to hint at the values, some are >> marked "AA4", which does not

RE: Help Identifying Components

> > > > My guess is capacitors also. > > > Noting they are paralleling resistors, they're probably just noise/AC bypass, on > the order of 0.01 uF, and not overly consequential to understanding the basic > circuit. > > Again, one can draw it out with the above presumption and then assess >

Re: Restoring a VT50 (VT52 actually) .

> From: Mattis Lind > Unfortunately I am not having any lutfisk this year. The rest of the > family is not very fond of it. I"m glad to see there are _some_ non-crazy people there! :-) Anway, I can way top that - the tradition Bermudian Christmas dish is cassava pie: make that wrong

SM EVM A131-10 advice

Hi, I'm brand new to vintage computing and would love any advice. I'm thinking of putting together a SM EVM A131-10 and would appreciate any advice/knowledge on the unit.