Not Getting Emails

I have not had any emails from cctalk for 2 or 3 weeks. I went to my subscription details and saw that emails were disabled for me. I re-enabled them a few days ago but I still have not received any new emails. I can see that there is traffic by looking at the archives, and if I am not getting

RE: Not Getting Emails

> > I received this one on the list. > > I haven't had any problems with list mail. at all. > But, that doesn't mean that everybody else has been so fortunate. > > -- Thanks. I saw it appear in the archive. I have checked junk mail, but have found nothing. I don't know how to diagnose it. My

RE: Bitsavers size

> > The bitsavers archive is 267 Gbytes. > > > > So at 4.7G per DVD, it comes out to almost 60 DVD's. > > That is not totally ridiculous > > Now, if I want bitsavers on paper tape > > > My back of the envelope calculation comes to approximately 4 million miles of paper tape.

RE: Bitsavers size

> > My back of the envelope calculation comes to approximately > > 4 million miles of paper tape. > > I think you're out by a factor of 10 267*10^9 bytes, divide by 10 as > there are > 10 bytes to the inch on paper tape, and convert to miles. I get just over > 400,000 > miles. > Agreed,

RE: Logic Analyser Advice

> -Original Message- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of William > Maddox > Sent: 10 September 2016 02:41 > To: General Discussion: On-Topic and Off-Topic Posts ; > r...@jarratt.me.uk > Subject: Re: Logic Analyser Advice > > On the

RE: Reset NVRAM on DECstation 5000/240

> -Original Message- > From: Maciej W. Rozycki [mailto:ma...@linux-mips.org] > Sent: 31 July 2017 14:26 > To: r...@jarratt.me.uk; Rob Jarratt ; General > Discussion: On-Topic and Off-Topic Posts > Subject: Re: Reset NVRAM on DECstation

Anyone Have a DECstation 220?

I have gone back to check some tracks in the leak-damaged area and I am having some difficulty verifying the connections to one of the chips. Does anyone have one of these machines, preferably working, that could help me to check a few connections? Regards Rob

RE: Sperry UTS 40 on EBay - Statesboro, Georgia

> -Original Message- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Ali via > cctalk > Sent: 01 August 2017 19:00 > To: 'Bill Gunshannon' ; 'General Discussion: > On-Topic and Off-Topic Posts' > Subject: RE: Sperry

RE: Reset NVRAM on DECstation 5000/240

> -Original Message- > From: Maciej W. Rozycki [mailto:ma...@linux-mips.org] > Sent: 01 August 2017 19:38 > To: r...@jarratt.me.uk > Cc: 'General Discussion: On-Topic and Off-Topic Posts' > > Subject: RE: Reset NVRAM on DECstation 5000/240 > > On Mon, 31 Jul

RE: DECstation 220. Another Impasse

> > Some great ideas Peter, thanks! I will double check the scope, I wonder if mine > doesn't have the bandwidth to show a glitch that is occurring? I will consider > cutting the track, which is also a great idea. I really do have to hope that it isn't > the gate array, it is my last resort,

RE: DECstation 220. Another Impasse

I already did that, it looked "normal". But I will check it all again. For now I need to investigate the two pins on the gate array that appear connected to 0V on one board but not on the other. Regards Rob > -Original Message- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On

DECstation 220. Another Impasse

I have reached another impasse in my attempts to get my DECstation 220 to work. I have posted the details on my blog here: https://robs-old-computers.com/2017/08/13/decstation-220-update/ If anyone has any suggestions I would be interested to hear them. Thanks Rob

RE: DECstation 220. Another Impasse

> -Original Message- > From: Rob Jarratt [mailto:robert.jarr...@ntlworld.com] > Sent: 13 August 2017 20:31 > To: General Discussion: On-Topic and Off-Topic Posts (cctalk@classiccmp.org) > > Subject: DECstation 220. Another Impasse > > I have reached another

RE: DECstation 220. Another Impasse

> -Original Message- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Peter > Coghlan via cctalk > Sent: 15 August 2017 09:48 > To: General Discussion: On-Topic and Off-Topic Posts > Subject: RE: DECstation 220. Another Impasse > > > > > I have

Identifying Some SOT-23 Components

I am still trying to fix my DECstation 220 motherboard. It suffered damage from battery leakage and I have found that replacing a couple of components has improved matters in that the BIOS now seems to execute consistently and the processor does not keep resetting. However the BIOS seems to be in

RE: Identifying Some SOT-23 Components

> -Original Message- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Al Kossow > via cctalk > Sent: 14 July 2017 00:06 > To: cctalk@classiccmp.org > Subject: Re: Identifying Some SOT-23 Components > > > > On 7/13/17 3:24 PM

RE: tape baking (Rob Jarratt)

> -Original Message- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Michael > Thompson via cctalk > Sent: 09 July 2017 15:41 > To: cctech > Subject: Re: tape baking (Rob Jarratt) > > > > > Date: Fri, 7 Jul 2017 21:19:03 +0100 > > From: "Rob

RE: tape baking

> I long to hear again the sound of the line printer that was attached to the > DECSYSTEM-20 I used to use. I think it was a drum printer but I don't know the > model (I may have some materials around that mention the model, not sure > where they are now though). I could never house one of these

RE: tape baking (Rob Jarratt)

> -Original Message- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Rich > Alderson via cctalk > Sent: 10 July 2017 20:05 > To: 'General Discussion: On-Topic Posts' > Subject: RE: tape baking (Rob Jarratt) > > From: Michael Thompson > Sent:

RE: tape baking (Rob Jarratt)

son <ri...@livingcomputers.org>; General Discussion: On-Topic > Posts <cct...@classiccmp.org> > Subject: Re: tape baking (Rob Jarratt) > > On Mon, Jul 10, 2017 at 3:38 PM, Rob Jarratt via cctalk > <cctalk@classiccmp.org> wrote: > Do you have any videos (wit

RE: tape baking

> -Original Message- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Mark J. > Blair via cctalk > Sent: 06 July 2017 17:47 > To: General Discussion: On-Topic and Off-Topic Posts > Subject: Re: tape baking > > > > On Jul 4, 2017, at 08:16, Al

RE: DEC TRAX documentation set for sale

> -Original Message- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Paul Koning > via cctalk > Sent: 06 July 2017 22:01 > To: Alan Frisbie ; General Discussion: On-Topic and > Off-Topic Posts > Subject: Re: DEC TRAX

RE: Through-hole desoldering (was Re: IBM 5110 - Where does the character set live? And other questions.)

> > A couple of years ago I bought the UK-branded equivalent of the Zhongdi ZD- > 915 desoldering station and I can quite honestly say it’s the best thing I’ve > bought for this hobby/obsession. To anyone struggling with solder wick and > manual pumps it’s worth far more in saved time than

Anyone Know Anything About This TURBOchannel Card?

I finally got something out of my newly acquired DECstation 5000/240. It contained a mystery adapter which reports itself as: 1: JV01A-AADECx0.06 TCF0 (MultiMedia Engineering) And when I got the detailed configuration it reported: 1: JV01A-AADECx0.06 TCF0 (Audio,

Looking for a TURBOchannel Extender Cable

Today I finally got the DECstation 5000/240 with a TURBOchannel Extender cable from the Mesa Electronics clearout back in May. Details here if anyone is interested: https://robs-old-computers.com/2017/07/15/decstation-5000240/ Unfortunately I didn't get a cable to connect the Extender to the

Reset NVRAM on DECstation 5000/240

I am trying to get my new 240 going. Unfortunately all the diagnostic LEDs stay lit. From when I had a previous DECstation 5000/240 I found a note that I fixed this by resetting the NVRAM with a jumper. Unfortunately I did not record which jumper where, and I can't find mention of this in any

RE: Anyone Know Anything About This TURBOchannel Card?

> -Original Message- > From: John Forecast [mailto:j...@forecast.name] > Sent: 18 July 2017 16:27 > To: r...@jarratt.me.uk; Rob Jarratt ; General > Discussion: On-Topic and Off-Topic Posts > Subject: Re: Anyone Know Anything About This

RE: Removing Pitting and Rust From an Enclosure

> -Original Message- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Chuck Guzis > via cctalk > Sent: 20 July 2017 03:34 > To: Fred Cisin via cctalk > Subject: Re: Removing Pitting and Rust From an Enclosure > > On 07/19/2017 07:13 PM, Fred

What Is This Component?

I am trying to repair my DECstation 220 after a battery leak, and making some reasonable progress. I have reached a component that is unknown to me, so I don't know how it is supposed to behave. It is connected to the inputs of a CMOS NAND gate, where I measure a steady voltage of 1.8V, but the

RE: What Is This Component?

> > > > On 23 Jul 2017, at 23:05, Rob Jarratt via cctalk > > <cctalk@classiccmp.org> wrote I am trying to repair my DECstation 220 > > after a battery leak, and making some reasonable progress. I have > > reached a component that is unknown to me, so I

DECstation 220 Impasse Reached

Hello Everyone, As I have mentioned before I have made some progress on a DECstation 220, but I have reached an impasse. I get some signals on the data bus which I am not sure about. They look odd, but they could be normal, I just don't know. I took a picture of the scope trace, which is here:

RT-11 Distribution - Worth Saving?

http://www.ebay.co.uk/itm/292195584646

Removing Pitting and Rust From an Enclosure

The TURBOchannel extender I got has a bit of rust and quite a lot of dark pitting on the steel surfaces. I am not sure what the finish is, whether it is anodized or galvanized. In any case, does anyone have recommendations for how to remove the unsightly pitting? Bear in mind that I am in the UK,

RE: Removing Pitting and Rust From an Enclosure

> -Original Message- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Paul Koning > via cctalk > Sent: 20 July 2017 15:18 > To: Brent Hilpert ; General Discussion: On-Topic and Off- > Topic Posts > Subject: Re: Removing Pitting

RE: Removing Pitting and Rust From an Enclosure

> -Original Message- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Chuck Guzis > via cctalk > Sent: 20 July 2017 14:43 > To: Brent Hilpert via cctalk > Subject: Re: Removing Pitting and Rust From an Enclosure > > On 07/20/2017 12:02 AM, Brent

RE: Removing Pitting and Rust From an Enclosure

t; > on behalf of Rob Jarratt via cctalk <cctalk@classiccmp.org <mailto:cctalk@classiccmp.org> > Sent: Wednesday, July 19, 2017 12:52:44 PM To: General Discussion: On-Topic and Off-Topic Posts Subject: Removing Pitting and Rust From an Enclosure The TURBOchannel extender I g

RE: DECstation 220 - Out of Ideas?

> -Original Message- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Rob Jarratt > via cctalk > Sent: 28 June 2017 19:12 > To: 'shad' <shado...@gmail.com>; 'General Discussion: On-Topic and Off- > Topic Posts' <cctalk@classiccmp.org>

RE: tape baking

Yes, that was me. Regards Rob > -Original Message- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Al Kossow > via cctalk > Sent: 02 July 2017 18:04 > To: General Discussion: On-Topic and Off-Topic Posts > Subject: tape baking > > >

RE: tape baking

> -Original Message- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Noel > Chiappa via cctalk > Sent: 04 July 2017 15:53 > To: cctalk@classiccmp.org > Cc: j...@mercury.lcs.mit.edu > Subject: Re: tape baking > > > From: Al Kossow > > > You need moving air,

RE: tape baking

> -Original Message- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Al Kossow > via cctalk > Sent: 03 July 2017 20:39 > To: cctalk@classiccmp.org > Subject: Re: tape baking > > > > On 7/3/17 11:49 AM, Alan Frisbie via cctalk wrote: > > > So, what are the

RE: tape baking

> -Original Message- > From: william degnan [mailto:billdeg...@gmail.com] > Sent: 02 July 2017 18:57 > To: r...@jarratt.me.uk; Rob Jarratt ; General > Discussion: On-Topic and Off-Topic Posts > Subject: Re: tape baking > > Have you

RE: tape baking

> -Original Message- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Chuck Guzis > via cctalk > Sent: 02 July 2017 19:40 > To: cctalk@classiccmp.org > Subject: Re: tape baking > > On 07/02/2017 10:56 AM, william degnan via cctalk wrote: > > Have you also experimented

RE: tape baking

> -Original Message- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Glen Slick > via cctalk > Sent: 05 July 2017 03:12 > To: General Discussion: On-Topic and Off-Topic Posts > Subject: Re: tape baking > > After you got the TK50 tapes and the

RE: tape baking

> -Original Message- > From: Christian Corti [mailto:c...@informatik.uni-stuttgart.de] > Sent: 05 July 2017 08:48 > To: r...@jarratt.me.uk; Rob Jarratt ; General > Discussion: On-Topic and Off-Topic Posts > Subject: RE: tape baking >

RE: Line printer art: (was Re: tape baking)

> -Original Message- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Chuck Guzis > via cctalk > Sent: 06 July 2017 23:19 > To: General Discussion: On-Topic and Off-Topic Posts > Subject: Re: Line printer art: (was Re: tape baking) > > You know, I

RE: tape baking

> -Original Message- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Mark J. > Blair via cctalk > Sent: 06 July 2017 23:39 > To: General Discussion: On-Topic and Off-Topic Posts > Subject: Re: tape baking > > > > On Jul 6, 2017, at 3:34 PM,

RE: ChipQuik Troubles

> -Original Message- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Chuck Guzis > via cctalk > Sent: 05 July 2017 23:18 > To: cctalk@classiccmp.org > Subject: Re: ChipQuik Troubles > > On 07/05/2017 01:42 PM, Rob Jarratt via cctalk wrote: &g

RE: ChipQuik Troubles

hipQuik Troubles > > On 07/05/2017 03:42 PM, Rob Jarratt via cctalk wrote: > > I bought some ChipQuik recently and managed to successfully remove a > > 74LS125 with little trouble. Today I have come to trying to desolder > > another similar sized chip, but try as I might I j

RE: Reviving VT220?

> -Original Message- > From: cctech [mailto:cctech-boun...@classiccmp.org] On Behalf Of Gregory > Beat via cctech > Sent: 28 April 2017 18:28 > To: cct...@classiccmp.org > Subject: Re: Reviving VT220? > > For your education, Google search "Flyback transformer" > > There are a number of

RE: Looking for a TURBOchannel Extender Cable

> -Original Message- > From: Rob Jarratt [mailto:robert.jarr...@ntlworld.com] > Sent: 15 July 2017 22:11 > To: General Discussion: On-Topic and Off-Topic Posts (cctalk@classiccmp.org) > > Subject: Looking for a TURBOchannel Extender Cable > > Today I finally got

RE: DECstation 220 Impasse Reached

DECstation 220 Impasse Reached > > On Fri, 2017-07-28 at 18:04 +0100, Rob Jarratt via cctalk wrote: > > Anyone have any thoughts on whether those data signals look right? > > It doesn't look obviously wrong. If the vertical scale is 2V per box then the > amplitude is pro

RE: DECstation 220 Impasse Reached

Anyone have any thoughts on whether those data signals look right? Thanks Rob From: Rob Jarratt [mailto:robert.jarr...@ntlworld.com] Sent: 27 July 2017 21:18 To: General Discussion: On-Topic and Off-Topic Posts (cctalk@classiccmp.org) Subject: DECstation 220

RE: DECstation 220 Impasse Reached

gt; > > > On Jul 28, 2017, at 1:04 PM, Rob Jarratt via cctalk <cctalk@classiccmp.org> > wrote: > > > > Anyone have any thoughts on whether those data signals look right? > > It's hard to guess at signals when the horizontal and vertical scales are not > stated, nor where in the circuit the signal was found. > > paul

RE: Sperry UTS 40 on Ebay - Statesboro, Georgia

> -Original Message- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Dominique > Carlier via cctalk > Sent: 30 July 2017 12:44 > To: jim stephens via cctalk > Subject: Re: Sperry UTS 40 on Ebay - Statesboro, Georgia > > Can you tell me where the

RE: Looking for a TURBOchannel Extender Cable

> > I have not yet been able to locate one of these, although I now know > > the part number, which is 17-03335-01. > > > Andf it is even in the UK: > > http://refurb.icc4it.co.uk/parts/legacy/dec/17-03335-01 > Thanks Emanuel. Actually I have already seen that page. It looks like one of

RE: Looking for a TURBOchannel Extender Cable

> > > > I have not yet been able to locate one of these, although I now know > > > the part number, which is 17-03335-01. > > > > > > Andf it is even in the UK: > > > > http://refurb.icc4it.co.uk/parts/legacy/dec/17-03335-01 > > > > > Thanks Emanuel. Actually I have already seen that page. It

RE: DECstation 220. Another Impasse

> I was out most of this evening, but I just had a quick look again and think I have > found something significant. Comparing the gate array pins on the two boards I > have, I see that on the board where the video is corrupted, there are two pins > that appear connected to 0V that are not

This Is Such An Exciting Listing!

http://www.ebay.co.uk/itm/182707649701

RE: DEC VT125 on Schpock in Birmingham, UK

Never heard of that site before, always wanted a VT125 and certainly reachable from here. Will investigate! Regards Rob > -Original Message- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Paul > Anderson via cctalk > Sent: 19 August 2017 22:40 > To: Pete Hollobon

RE: DECstation 220. Another Impasse

> -Original Message- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Noel > Chiappa via cctalk > Sent: 19 August 2017 23:26 > To: cctalk@classiccmp.org > Cc: j...@mercury.lcs.mit.edu > Subject: Re: DECstation 220. Another Impasse > > > From: Rob Jarratt > > >

RE: DEC VT125 on Schpock in Birmingham, UK

> -Original Message- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Rob Jarratt > via cctalk > Sent: 19 August 2017 23:33 > To: 'Paul Anderson' <used...@gmail.com>; 'General Discussion: On-Topic and > Off-Topic Posts' <cctalk@classiccmp

RE: DECSystem 3100 (broken) for free

You need to tell people where you are located. Regards Rob Sent from my Windows 10 phone From: Lukas Kaminski via cctalk Sent: 15 May 2017 11:40 To: cctalk@classiccmp.org Subject: DECSystem 3100 (broken) for free Hello list, does anybody need a broken MIPS-Server? The battery leaked and

DECstation 220 - Out of Ideas?

As I mentioned in an earlier email, I have been trying to fix a DECstation 220. I have made what I think may be some progress, but I am out of ideas now. The problem appears to be that the 80286 CPU is shutting down and then the Olivetti chip is RESETting it repeatedly. The reason for this

RE: DECstation 220 - Out of Ideas?

> -Original Message- > From: cctech [mailto:cctech-boun...@classiccmp.org] On Behalf Of shad > via cctech > Sent: 26 June 2017 21:57 > To: cct...@classiccmp.org > Subject: RE: DECstation 220 - Out of Ideas? > > Hello Rob, > if you are uncomfortable with soldering, I can replace the IC

RE: DECstation 220 - Out of Ideas?

> -Original Message- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Pete > Turnbull via cctalk > Sent: 25 June 2017 16:12 > To: cctalk@classiccmp.org > Subject: Re: DECstation 220 - Out of Ideas? > > As soon as I saw "74LS125" I thought, "Oh, yes, another one".

RE: DECstation 220 - Out of Ideas?

> Thanks Ian. Unfortunately I don't know of any schematics. I suspect you are > right about it being a wire-OR because the documentation for the P82C206 says > its output is tri-state. As everything is soldered on rather than socketed > (except > the ROMs) I am not sure I can measure any

RE: DECstation 220 - Out of Ideas?

> When replacing components on an SMD board, I prefer to use a low-temp > fusible alloy such as "Chip Quik": > > http://www.chipquik.com/store/ > > A nice kit, but really, any low temp fusible alloy will work. I use > Cerrobend as a > powder, packed around the IC. > >

RE: DECstation 220 - Out of Ideas?

> -Original Message- > From: Dave Wade [mailto:dave.g4...@gmail.com] > Sent: 25 June 2017 20:26 > To: r...@jarratt.me.uk; 'Rob Jarratt' ; 'General > Discussion: On-Topic and Off-Topic Posts' > Subject: RE: DECstation 220 - Out of Ideas?

RE: DECstation 220 - Out of Ideas?

> -Original Message- > From: Ian S. King [mailto:isk...@uw.edu] > Sent: 25 June 2017 01:07 > To: r...@jarratt.me.uk; Rob Jarratt ; General > Discussion: On-Topic and Off-Topic Posts > Subject: Re: DECstation 220 - Out of Ideas? > >

Datasheet for Olivetti GA099-B?

I am trying to get a DECstation 220 working again. It looks like the 80286 is being constantly reset. The reset signal seems to come from an Olivetti GA099-B chip. I have not been able to find a datasheet for this online. Does anyone have one, or know where I might find one? Thanks Rob

RE: FTGH clear-out at Mesa Electronics, Richmond, CA, USA

Oh dear. I hope it is fixed soon and not too costly. I think we all appreciate your effort to help save this equipment. Regards Rob Sent from my Windows 10 phone From: Anders Nelson via cctalk Sent: 24 May 2017 23:20 To: General Discussion: On-Topic and Off-Topic Posts Subject: Re: FTGH

RE: FTGH clear-out at Mesa Electronics, Richmond, CA, USA

Aaron/Anders, Aaron lives relatively close to me, my parents live in the same city. So if there is anything that Aaron wants that is still available then perhaps we could combine it into one package and share a bit of the shipping cost. I could get it to Aaron later. Regards Rob >

RE: FTGH clear-out at Mesa Electronics, Richmond, CA, USA

> -Original Message- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of classiccmp-- > - via cctalk > Sent: 22 May 2017 03:32 > To: cctalk@classiccmp.org > Subject: Re: FTGH clear-out at Mesa Electronics, Richmond, CA, USA > > Regarding the thread started by Peter

RE: Re: Directory of old computer collectors

> -Original Message- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Randy > Dawson via cctalk > Sent: 24 May 2017 07:47 > To: jim stephens ; steven stengel ; > General Discussion: On-Topic and Off-Topic Posts

RE: FTGH clear-out at Mesa Electronics, Richmond, CA, USA

> -Original Message- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Pontus > Pihlgren via cctalk > Sent: 22 May 2017 12:58 > To: classic...@crash.com; General Discussion: On-Topic and Off-Topic Posts > > Subject: Re: FTGH clear-out at Mesa

RE: Anybody has Control Data (CDC) disk packs for 841 and 844 disk drives to spare with?

> -Original Message- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of jim > stephens via cctalk > Sent: 04 June 2017 21:41 > To: Chuck Guzis via cctalk > Subject: Re: Anybody has Control Data (CDC) disk packs for 841 and 844 disk > drives to

RE: Anybody has Control Data (CDC) disk packs for 841 and 844 disk drives to spare with?

> -Original Message- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Al Kossow > via cctalk > Sent: 03 June 2017 18:49 > To: cctalk@classiccmp.org > Subject: Re: Anybody has Control Data (CDC) disk packs for 841 and 844 disk > drives to spare with? > > > > On 6/3/17

RE: Anybody has Control Data (CDC) disk packs for 841 and 844 disk drives to spare with?

> -Original Message- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of jim > stephens via cctalk > Sent: 04 June 2017 22:43 > To: General Discussion: On-Topic and Off-Topic Posts > Subject: Re: Anybody has Control Data (CDC) disk packs for 841 and

RE: dd-equivalent for VMS

I have had multiple interesting and useful answers. Thanks everyone. I checked on VMS 7.3 and there is no COPY/IMAGE there. BACKUP/IMAGE had been my first thought, but it won't accept a tape as the source of the image data unfortunately. I have a TZ30, so I will try that on Ultrix. I will also

RE: dd-equivalent for VMS

> -Original Message- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Rick > Murphy via cctalk > Sent: 17 June 2017 14:06 > To: cctalk@classiccmp.org > Subject: Re: dd-equivalent for VMS > > On 6/17/2017 4:04 AM, Rob Jarratt via cctalk wrote: &g

dd-equivalent for VMS

Is there a dd equivalent for VMS? Background: I am trying to recover some TK50 tapes that were written on Ultrix. I have a MIPS machine with Ultrix 4.5 on it and a TK50Z drive. I have been able to read some tapes but they all seem to get an I/O error after a while of reading. I think

RE: DEC archives

> I have therefore come to the conclusion that people don't want my scans (for > whatever reason). And I am not going to waste my time scanning manuals as a > result. So no Philips P800 schematics, etc. > I would suggest that it is not a waste of time at all. If BitSavers won't have them

RE: FTGH Large amount of DEC/Misc Classic computer hardware

A pity this is the wrong the side of the pond and shipping is so expensive, otherwise I would love to get a 5000/240 or 5000/260 and some 5" drives. Regards Rob > -Original Message- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Guy > Sotomayor Jr via cctalk > Sent:

RE: FTGH Large amount of DEC/Misc Classic computer hardware

> I’ve been told about reship.com who I guess are like a US equivalent of > parcel2go over here. You pay domestic US shipping to them and they add a > surcharge to forward it over to you, presumably by boat. What I don’t know is > how that affects import duty etc but it might be worth looking

RE: EMI filter in PDP-11/23

I had a failure of a Corcom filter in my Rainbow, it was a different model to yours though, it too had failed short. I found a Power Entry Module on the Farnell site and made a crude panel for it to mount it, just like the socket you are talking about. I would just look at the datasheet to get the

H7878 Fails Under Even Moderate Load

I have been doing more work on my H7878 PSU for my DECstation 5000 Model 240. It looks like if I put the +5V or -12V outputs under any kind of load then it stops working. I have posted more details here: https://robs-old-computers.com/2017/09/17/decstation-5000-model-240-psu-fail

RE: H7878 Fails Under Even Moderate Load

Many thanks for all the suggestions. I will go through them all, although it may take me a while On your last point, at first I thought that there isn't any feedback from the machine. However, apart from a DC OK (which will be an output), there is a wire labelled "Warning", which could

RE: Rainbow Disk Imager

> There's no Linux systems, no C compilers, emulators or weird hardware > available. > > But I do have a Rainbow which is the console to the 11/73 > And the Rainbow isn't "weird hardware"? :-)

RE: H7878 Fails Under Even Moderate Load

Thanks for that. The slow start one sounds like an interesting avenue to explore. I have been told some of the capacitors on these tend to be bad. Finding the capacitor (if it does indeed do a slow start) will be a challenge for me. I have been reverse engineering the schematic a bit, but some

RE: DEC RRD40-44 Caddy Needed

> -Original Message- > From: cctech [mailto:cctech-boun...@classiccmp.org] On Behalf Of Robert > Adamson via cctech > Sent: 13 October 2017 21:05 > To: cct...@classiccmp.org > Subject: DEC RRD40-44 Caddy Needed > > Does anyone (UK preferably) have a caddy for a DEC RRD44 CDROM drive >

RE: PSU Input Rectifier Question

> That is absolutely the classic circuit. I assume the AC terminals of the > bridge > rectifier come from the mains input, possibly via fuse,switch,filter. > > To understand it, draw the bridge as 4 separate diodes. Now assume the triac > is > turned off (open-crcuit) and it's just a standard

RE: PSU Input Rectifier Question

apley, Mark' <mtap...@swri.edu> > Subject: RE: PSU Input Rectifier Question > > On Tue, 29 Aug 2017, Rob Jarratt via cctalk wrote: > > > Not really no. The base of the capacitors is actually touching the > > board, so I can't get under it to cut anything anyway, whi

RE: PSU Input Rectifier Question

> -Original Message- > From: Maciej W. Rozycki [mailto:ma...@linux-mips.org] > Sent: 30 August 2017 09:21 > To: r...@jarratt.me.uk > Cc: 'General Discussion: On-Topic and Off-Topic Posts' > ; 'Tapley, Mark' > Subject: RE: PSU Input Rectifier

RE: PSU Input Rectifier Question

> -Original Message- > From: Maciej W. Rozycki [mailto:ma...@linux-mips.org] > Sent: 30 August 2017 19:30 > To: r...@jarratt.me.uk > Cc: 'General Discussion: On-Topic and Off-Topic Posts' > ; 'Tapley, Mark' > Subject: RE: PSU Input Rectifier

RE: PSU Input Rectifier Question

(s). Once all the pins are broke free, you can extract it. On Tue, Aug 29, 2017 at 5:41 PM, Rob Jarratt via cctalk <cctalk@classiccmp.org <mailto:cctalk@classiccmp.org> > wrote: Good idea to drain them first, I will do that. Having never encountered snap-ins before I don't know, but f

What Is The Spec of This Capacitor?

I have found a leaked capacitor on my DECstation 5000 Model 240 PSU. The markings on it are not absolutely clear to me as it is simply marked 10 25. It looks to be connected to the 12V output, so I *think* this is a 10uF 25V capacitor. Can anyone confirm this for me from the following pictures?

RE: RIP Jerry Pournelle, the first author to write a novel on a computer Early adopt

> -Original Message- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Dave Wade > via cctalk > Sent: 11 September 2017 10:28 > To: 'Chuck Guzis' ; 'General Discussion: On-Topic and Off- > Topic Posts' > Subject: RE: RIP Jerry

Tips For Soldering a Surface Mount PLCC Socket

I want to replace a PLCC84 surface mounted chip and take the opportunity to socket it. I have looked at some YouTube videos to see how others have done this. I am thinking that the best way is going to be to pre-solder the pads on the socket, place the socket on the board and then heat the

RE: Tips For Soldering a Surface Mount PLCC Socket

Thanks for all the suggestions, I am still a little undecided on what to do, so I have a few follow-up questions 1. Pete, you said to use solder paste and associated flux. I had a look on the Farnell site and there seem to be quite a few different types. I don't really understand the

RE: H7878 Fails Under Even Moderate Load

Just to let everyone know, I have now fixed this PSU. The final write up is here: https://robs-old-computers.com/2017/10/01/decstation-5000-model-240-psu-fixed/ Thanks everyone for all the help. Now back to the DECstation 220, a ZX Spectrum, and then the daunting task of fixing the

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