Re: Livermore Data Systems / was Re: what is this NCR modem? what did it go to?
On 2017-11-28 7:11 PM, Brent Hilpert via cctalk wrote: On 2017-Nov-28, at 2:54 PM, Fred Cisin via cctalk wrote: On Tue, 28 Nov 2017, Brent Hilpert via cctalk wrote: I couldn't find the ebay listing for the NCR modem for some reason, either using the number or by searching by keywords. https://www.ebay.com/itm/132411929563 That works . . . forgot about composing the URL directly from the item number. Still won't show up with regular searches on ebay.com , although these do with "ncr acoustic": https://www.ebay.com/itm/NEW-ACOUSTIC-REVIVE-RTP-4-absolute-Power-supply-box-outlet-From-JP-with-tracking/252956939311?hash=item3ae568942f:g:YAgAAOSwJH1ZJosl Latest audiophool scam. Wow and only $2512.99 what a deal!
Re: Livermore Data Systems / was Re: what is this NCR modem? what did it go to?
On 2017-Nov-28, at 2:54 PM, Fred Cisin via cctalk wrote: > On Tue, 28 Nov 2017, Brent Hilpert via cctalk wrote: >> I couldn't find the ebay listing for the NCR modem for some reason, either >> using the number or by searching by keywords. > > https://www.ebay.com/itm/132411929563 That works . . . forgot about composing the URL directly from the item number. Still won't show up with regular searches on ebay.com , although these do with "ncr acoustic": https://www.ebay.com/itm/NEW-ACOUSTIC-REVIVE-RTP-4-absolute-Power-supply-box-outlet-From-JP-with-tracking/252956939311?hash=item3ae568942f:g:YAgAAOSwJH1ZJosl Latest audiophool scam.
Re: Livermore Data Systems / was Re: what is this NCR modem? what did it go to?
On Tue, Nov 28, 2017 at 3:58 PM, Brent Hilpert via cctalk < cctalk@classiccmp.org> wrote: > > Thanks for the additional datapoint. > It does suggest Model A production may likely have started in 1968. > Actual date codes in mine were 6908 to 7008. > The larger caps are also a good place to look for date codes. > > I did the schematic, if you have an interest. > Eventually I'll get a little web article up for the model. > > For the record, I'm not sure what model I have as the deteriorated foam from the top cover fell and stuck to the Livermore label between the two cups and clean up wiped off most of the info. Mine has a Motorola MC836P IC on the middle board that has a date code of 7206.
Re: Livermore Data Systems / was Re: what is this NCR modem? what did it go to?
On 2017-Nov-27, at 5:25 PM, steve shumaker via cctalk wrote: > On 11/27/2017 2:26 PM, Fred Cisin via cctalk wrote: The Livermore Data Systems modems that I sold off were from about 1964? >> >> On Mon, 27 Nov 2017, Brent Hilpert via cctalk wrote: >>> Were those the Livermore Data Systems modems in a wood box you were selling? >>> Did you have anything to ascertain the 1964 date for LDS, or were you >>> getting that date from the stuff on the web? >> . . . >>> Someone in some comments suggests LDS wasn't building these until 1968, >>> which strikes me as more plausible. >> >> Thank you! >> >> That is why I put a question mark after 1964. >> I was basing it on nothing more than verbal comment by the guy that I got >> them from. And, while I had them, I hadn't had any reason to particularly >> care. >> >> 1968 does, indeed, seem more plausible. >> >> It still serves to illustrate that 1971 is NOT too early for that NCR. >> >> -- >> Grumpy Ol' Fred ci...@xenosoft.com >> > I can add another data point to the discussion: > > My LDS Model A with SN 0491 has two TI transistors both with data code "6914" > > And for what it's worth, if you have one and have never opened it up, go do > so right now!The three small circuit boards have a 3"x4" piece of the > infamous black foam to pad the cards when inserted in the case. Of course > the foam is mostly gone now except for where it wraps around the cards and > corrodes the components that it touches! Thanks for the additional datapoint. It does suggest Model A production may likely have started in 1968. Actual date codes in mine were 6908 to 7008. The larger caps are also a good place to look for date codes. I did the schematic, if you have an interest. Eventually I'll get a little web article up for the model. I couldn't find the ebay listing for the NCR modem for some reason, either using the number or by searching by keywords.
Re: Livermore Data Systems / was Re: what is this NCR modem? what did it go to?
On 11/27/2017 2:26 PM, Fred Cisin via cctalk wrote: The Livermore Data Systems modems that I sold off were from about 1964? On Mon, 27 Nov 2017, Brent Hilpert via cctalk wrote: Were those the Livermore Data Systems modems in a wood box you were selling? Did you have anything to ascertain the 1964 date for LDS, or were you getting that date from the stuff on the web? . . . Someone in some comments suggests LDS wasn't building these until 1968, which strikes me as more plausible. Thank you! That is why I put a question mark after 1964. I was basing it on nothing more than verbal comment by the guy that I got them from. And, while I had them, I hadn't had any reason to particularly care. 1968 does, indeed, seem more plausible. It still serves to illustrate that 1971 is NOT too early for that NCR. -- Grumpy Ol' Fred ci...@xenosoft.com I can add another data point to the discussion: My LDS Model A with SN 0491 has two TI transistors both with data code "6914" And for what it's worth, if you have one and have never opened it up, go do so right now! The three small circuit boards have a 3"x4" piece of the infamous black foam to pad the cards when inserted in the case. Of course the foam is mostly gone now except for where it wraps around the cards and corrodes the components that it touches! Steve
Re: Livermore Data Systems / was Re: what is this NCR modem? what did it go to?
On 11/27/2017 2:26 PM, Fred Cisin via cctalk wrote: The Livermore Data Systems modems that I sold off were from about 1964? On Mon, 27 Nov 2017, Brent Hilpert via cctalk wrote: Were those the Livermore Data Systems modems in a wood box you were selling? Did you have anything to ascertain the 1964 date for LDS, or were you getting that date from the stuff on the web? . . . Someone in some comments suggests LDS wasn't building these until 1968, which strikes me as more plausible. Thank you! That is why I put a question mark after 1964. I was basing it on nothing more than verbal comment by the guy that I got them from. And, while I had them, I hadn't had any reason to particularly care. 1968 does, indeed, seem more plausible. It still serves to illustrate that 1971 is NOT too early for that NCR. -- Grumpy Ol' Fred ci...@xenosoft.com
Re: Livermore Data Systems / was Re: what is this NCR modem? what did it go to?
The Livermore Data Systems modems that I sold off were from about 1964? On Mon, 27 Nov 2017, Brent Hilpert via cctalk wrote: Were those the Livermore Data Systems modems in a wood box you were selling? Did you have anything to ascertain the 1964 date for LDS, or were you getting that date from the stuff on the web? . . . Someone in some comments suggests LDS wasn't building these until 1968, which strikes me as more plausible. Thank you! That is why I put a question mark after 1964. I was basing it on nothing more than verbal comment by the guy that I got them from. And, while I had them, I hadn't had any reason to particularly care. 1968 does, indeed, seem more plausible. It still serves to illustrate that 1971 is NOT too early for that NCR. -- Grumpy Ol' Fred ci...@xenosoft.com
Livermore Data Systems / was Re: what is this NCR modem? what did it go to?
On 2017-Nov-26, at 2:38 PM, Fred Cisin via cctalk wrote: > On Sun, 26 Nov 2017, couryho...@aol.com wrote: >> does the 71 sate seem early? > > No, a 1971 date does not seem too early. > > The price seems steep, even for a "relatively" early modem. > > Bell 103 (300bps) dates from 1962. > The Bell 101 (110 baud) was 1958. > > SCROTUS "Carterfone" was 1968 (ruling permitting direct connect) > > Bell 212A (1200bps) came out in 1976. > > The Livermore Data Systems modems that I sold off were from about 1964? > ... Were those the Livermore Data Systems modems in a wood box you were selling? Did you have anything to ascertain the 1964 date for LDS, or were you getting that date from the stuff on the web? There's stuff reffed all over the web and youtube of some guy stating the LDS Model A (in the dovetailed wood box) as 1964 and maybe 1963, his unit is serial # 279. http://www.phreakmonkey.com/2009/05/1964-livermore-data-systems-model-modem_31.html etc. He seems to be basing the claim on an LDS Model B unit (once at UCDavis, now at CHM) http://www.computerhistory.org/collections/catalog/102630200 which claims circa 1965, and 'thus the model A should be at least a year earlier'. I have an LDS Model A, serial # 858, the dates codes on the components are 1969 to 1970. I'm a little skeptical the model was being made as early as 1964. I wish the guy would, or knew to, simply open the unit and look at the date codes rather than guessing. Someone in some comments suggests LDS wasn't building these until 1968, which strikes me as more plausible.
