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Free: HP 64000 development systems
by Chris Loggans via Techtoolslist 05 Aug '17

05 Aug '17

I have two HP 64000 logic development systems that I'd like to pass along to someone who thinks they could use them. I got these years ago along with quite a bit of documentation but never got a chance to do anything with them. I don't have any pods that would be useful for arcade repair, but you might be able to locate them with a little searching. These are free for anyone who wants to pick them up in northern Virginia. If I don't find anyone interested locally, I'd consider shipping them but they are probably going to have to be crated so it's not going to be cheap. Thanks,-Chris _______________________________________________ Techtoolslist mailing list Techtoolslist(a)flippers.com https://pairlist7.pair.net/mailman/listinfo/techtoolslist FTP site is: ftp://ttl.arcadetech.org/TTL/Test_Equipment Archive site: http://seven.pairlist.net/pipermail/techtoolslist/

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WTB: Fluke Z8000 pod
by Ian Eure 21 Jul '17

21 Jul '17

Still looking for one of these, hit me up if you've got one you'd let go. _______________________________________________ Techtoolslist mailing list Techtoolslist(a)flippers.com https://pairlist7.pair.net/mailman/listinfo/techtoolslist FTP site is: ftp://ttl.arcadetech.org/TTL/Test_Equipment Archive site: http://seven.pairlist.net/pipermail/techtoolslist/

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Help with BK 545 circuit analyzer
by Chris Rinewalt 23 Jun '17

23 Jun '17

Sorry, this is a bit long.... I picked up a BK 545 circuit analyzer that appeared to be operating OK, but did have issues. For instance, upon first power up instead of displaying a horizontal line, it had an asymmetrical oval shape distorted along the neg Y-axis. It would display somewhat correct V-I curves for resistors and diodes, but rather than a single line, signatures were ovoid an distorted. Oddly, when I turned it on the next day, this issue was gone, but there was a fair bit of noise along the curves. I am still searching for a manual for the unit, but I was able to get the schematic and service sheet from BK, so I tried to calibrate it. It was a royal pain and some of the procedures I could not get to work properly to meet the indicated specs (more on this below), but I have it operating fairly well with two issues that I think are related. First, the 60Hz sampling frequency cannot be adjusted to spec. I followed the procedure and it just bounces all over the place (though if I engage the low pass filter on the frequency counter it does settle down). To get the clock, a TLC555 is used, with a fixed 20K Ohm resistor (R141) and a 50K ohm pot (VR105) between the output and threshold (http://imgur.com/2Ez8C6N) At 60HZ, F1 and F2 are lo, so it's just the resistor, pot and 470 pF cap (C105) in circuit with the TLC555. To attain 60HZ, VR105 is adjusted to attain an approximately 30.72KHz square wave from the output. I can adjust the pot just fine, but it only outputs an signal of approximtely 30.2Khz which gives an frequency of about 58.2Hz. Not bad, but the odd thing is adjusting the pot one way has little to no effect while adjusting the other way introduces a lot of noise into Q, which causes a noisy frequency output that bounces around. It's odd, the signal is fine, turning the pot makes a little difference for some travel and then at a certain point the square wave gets all out of whack and the output sampling frequency bounces all over the place. This happens up to about 48KHz or so (I forget the exact freq) from Q when the square wave clears up again, causing the output frequency to be about 75+ Hz, too far off. So, why is it that the Q output of the 555 is 'clean' for only two small portions of the pots travel, neither of which align with the required 59-61Hz called for in the service sheet? Then there is a second issue with the 60Hz signal. As I stated above, I had a heckuva time getting this thing spec'd. I came to realize that the 4 other pots in other circuit sections used in the calibration are pretty much dependent on one another. The noise @ 60Hz was originally so bad I figured it had to be an op-amp (TL084) or one of the other CMOS ICs. So, I pulled and tested every IC in that part of the circuit (and then some), along with the 50K pot. All tested fine, but I replaced them anyway. And still there is noise. Even if I adjust VR105 to reach a stable 30.2KHz from the 555, getting ~ 58Hz sampling freq, it still has so much noise that my counter can't lock onto it without a low pass filter as noted above. When I switch to one of the other sampling frequencies (400Hz, 1Khz, 2KHz) there are no such issues. So, here is where I am stuck. I did read somewhere that ceramic disc caps should not be used in a 555 astable oscillator circuit, but I have to assume BK engineers knew what they were doing and that is not an issue. I did test the 22uF electrolytic (C104) on the +5v line and it is OK, but I don't have anything to test the 470pF disc cap. I do know it is not shorted. R141 is in spec (19.7K). There is some noise on the triangle wave on pins 2/6 of the 555, which clear up when any sampling frequency other than 60Hz is selected. I replaced the LS390 that Q feeds into but still no change. So other than that what else in this circuit could be affecting it? _______________________________________________ Techtoolslist mailing list Techtoolslist(a)flippers.com https://pairlist7.pair.net/mailman/listinfo/techtoolslist FTP site is: ftp://ttl.arcadetech.org/TTL/Test_Equipment Archive site: http://seven.pairlist.net/pipermail/techtoolslist/

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Fluke RAM upgrade on eBay
by Ian Eure 21 Jun '17

21 Jun '17

There was a 9100 RAM upgrade with some 4.1 floppy disks & a 1.4 service disk which sold on eBay overnight. Did someone here pick it up? I put in an offer so I could archive the disks, but someone hit BIN overnight. If someone here got it, I'd love to borrow the disks so I can make proper archival copies of them. _______________________________________________ Techtoolslist mailing list Techtoolslist(a)flippers.com https://pairlist7.pair.net/mailman/listinfo/techtoolslist FTP site is: ftp://ttl.arcadetech.org/TTL/Test_Equipment Archive site: http://seven.pairlist.net/pipermail/techtoolslist/

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Gottleib System 1 and Rockwell PPS4 stuff
by John Robertson 20 Jun '17

20 Jun '17

Anyone here with an interest in making an adapter for some Fluke pod for the 9010 or 9100 can have free access to my library of PPS4 files - I have just run them through Adobe so they are searchable and posted on the TTL library. ftp://ttl.arcadetech.org/TTL/Test_Equipment/Rockwell_PPS4_files/ I never found the time to do an interface and with moving my shop and everything else I doubt I can do anything for a few years so why not toss it out there! Have fun. John :-#)# -- How to subscribe or unsubscribe from TTL http://seven.pairlist.net/mailman/listinfo/techtoolslist _______________________________________________ Techtoolslist mailing list Techtoolslist(a)flippers.com https://pairlist7.pair.net/mailman/listinfo/techtoolslist FTP site is: ftp://ttl.arcadetech.org/TTL/Test_Equipment Archive site: http://seven.pairlist.net/pipermail/techtoolslist/

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ICT-101 RAM/ROM test feature, anyone have it?
by Tony Jones 02 Jun '17

02 Jun '17

My ICT-101 lacks the ROM/RAM test. According to the manual (thanks again to Pat/John for making the scan happen) - G, "RAM TEST/ROM TEST INACTIVE - Without the RAM/ROM Test Options installed (available from Micro Sciences), the ICT-101 in its - standard configuration is unable to test memory chips. Thus, without the appropriate option - installed in the ICT-101, the above message(s) will be displayed. I uploaded some pics of my ICT: https://postimg.org/gallery/2sv3lagbu/ I'm curious how it differs from anyone's who has the RAM/ROM test feature present. I'm not sure if it's one of the missing chips on the upper board, or within the potted contents of the lower pcb Any help gratefully appreciated. Thanks Tony _______________________________________________ Techtoolslist mailing list Techtoolslist(a)flippers.com https://pairlist7.pair.net/mailman/listinfo/techtoolslist FTP site is: ftp://ttl.arcadetech.org/TTL/Test_Equipment Archive site: http://seven.pairlist.net/pipermail/techtoolslist/

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General Electric tube tester YTW-1
by Chris Mann 31 May '17

31 May '17

I am looking for an instruction manual and schematic diagram for the GE YTW-1 tube tester. Any help would be gratefully appreciated,and all expenses paid. Many thanks. _______________________________________________ Techtoolslist mailing list Techtoolslist(a)flippers.com https://pairlist7.pair.net/mailman/listinfo/techtoolslist FTP site is: ftp://ttl.arcadetech.org/TTL/Test_Equipment Archive site: http://seven.pairlist.net/pipermail/techtoolslist/

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WTB : American Reliance AR-90LMC logic comparator
by Fabrizio Vasile 31 May '17

31 May '17

Hi all, I'm looking for the AR-90LMC logic comparator by American Reliance (working or not working).Thanks. Regards --- Questa e-mail è stata controllata per individuare virus con Avast antivirus. https://www.avast.com/antivirus _______________________________________________ Techtoolslist mailing list Techtoolslist(a)flippers.com https://pairlist7.pair.net/mailman/listinfo/techtoolslist FTP site is: ftp://ttl.arcadetech.org/TTL/Test_Equipment Archive site: http://seven.pairlist.net/pipermail/techtoolslist/

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Looking for BK Precision 545 circuit analyzer manual
by Chris Rinewalt 23 May '17

23 May '17

Hello all, I've been reading the archives and such for a while now, enjoying all the information that is available. As it turns out, I have a request. Does anyone have a BK 545 circuit analyzer manual that they'd be able to scan and upload, or possibly sell if scanning is not an option? Also, is there any need for a scan of the American Reliance AR-90LMC logic comparator/monitor manual? If so, I could scan and upload. Thank you, Chris _______________________________________________ Techtoolslist mailing list Techtoolslist(a)flippers.com https://pairlist7.pair.net/mailman/listinfo/techtoolslist FTP site is: ftp://ttl.arcadetech.org/TTL/Test_Equipment Archive site: http://seven.pairlist.net/pipermail/techtoolslist/

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Fluke 9100 Floppy archive
by Ian Eure 17 May '17

17 May '17

I've added many more disks to my 9100 disk image archive, thanks to Chris Loggans. There are now 41 disk images in total. Newly added, imaged from factory media: System V6.0 - System disks 1-3, Master user disks 1 & 2, Programmer system disk, IEEE 488 feature disk, and the demo/trainer userdisk. System V6.1 - System disks 1-3, Master user disks 1 & 2, IEEE 488 feature disk. Programmers Disk Set V6.1 - Programmer system disk, demo/trainer userdisk. IEEE feature disk V6.1 Z80QT pod user disk V1.0 9132A 68HC11 master user disks V1.1 (appears to be missing one disk) 9132A 80C186/80C188 master user disks V1.1 9132FT 68020 master user disks V2.1 The V6.0 and V6.1 system disk sets are complete and have no installation restrictions. I was able to format my 9100A and install V6.1 on it from duplicates created from the images. I verified that the V6.0 images also booted the machine, but I didn't do a full install test. I also added the V1.4 and V6.0 service disks. These are second- generation images, so not archival quality, but it's convenient to have them in the same place. There are also two user-created disks, one for troubleshooting Gottlieb System 80 UUTs, and a training work disk. All the images are in the same place: https://github.com/ieure/ If anyone would like to loan more disks for archival, please reach out. I'd be happy to pay shipping and/or return your disks with physical copies of any disks you might need. -- Ian _______________________________________________ Techtoolslist mailing list Techtoolslist(a)flippers.com https://pairlist7.pair.net/mailman/listinfo/techtoolslist FTP site is: ftp://ttl.arcadetech.org/TTL/Test_Equipment Archive site: http://seven.pairlist.net/pipermail/techtoolslist/

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