Lots of tubed 74xx, memory, PALS etc plus boxes of pulls to clear - Page 1
Forum section: electronics / general

author: woodchips
author_rank: Frequent Contributor
timestamp: December 11, 2016, 10:37:36 am
content: This is a collection of chips bought from a place I worked at 25 years ago when it closed down.It is a wide range of types and technologies, LS, F, S, HC etc.Collection of PALs, 22V10, GAL20V8 but mostly bipolar ordinary and A types.Lots of memories, EPROM, SRAM, DRAM, FIFO etc. Largest is only 1Mx1 or 256Kx4, lots of 1K bit and similar.Many processor chips, mainly from the 6800/68000 families but did see Zilog and Intel families in there.Far too many to count; for example there are 40 tubes of 32K and 256K bit fast SRAM for caches; 50 tubes of PALs. Let me hasten to add that many tubes are not full, this is a working collection of chips!All the chips but a few percent date from the 80's, did see some from the 70's, also a few from the 90's such as the GALs. All the chips are DIL, odd zig-zag but mostly predates PGA and similar.All the chips to the best of my knowledge are new and unused, but many of the fast SRAMs have been soldered, also sure the GALs are pulls.There are 14 boxes of varying size, at a guess there are 1,000 tubes of chips, if only half full then that is 10,000 chips.More chips, this is the boxes of pulls removed from various test equipment over the last 10 years. This selection is far more eclectic, basic TTL but also many processor chips, Z80, 6800, 6502, and peripherals. Also lots of analogue from op amps to ADC and DAC modules, Philbrick amps etc. Apart from processors, modules and similar they are all pin in hole. Can't begin to guess how many, 20,000? I have stored many of the digital parts in antistatic foam but still many loose. The analogue parts tend to be in plastic bags, fewer of each part number. The only unsoldered parts are interesting ones like 9511's.At £0.10 each that is £3000! Yours for £1000 but you will need to collect.

author: ebclr
author_rank: Super Contributor
timestamp: December 11, 2016, 11:04:50 am
content: Do you really expect to sell this ?What is the buyer profile you have in mind ?

author: philpem
author_rank: Frequent Contributor
timestamp: December 11, 2016, 03:05:58 pm
content: I'll echo ebclr's comment...Unsorted job lots tend not to sell for high prices - much less £1k.Fact: Pulls have zero value unless they're tested good. Desoldered pulls even more so.PALs are one time programmable. If they're programmed, they're scrap.GALs at least can be erased, but if the PES is scrambled, they're scrap.10,000 curated, sorted, arranged, 80s vintage chips - with datasheets and a database saying "these chips are in this box"? That could be £1k of value -- because the added value is in "I'm not having to sort through this mass of stuff". Might only want one or two parts, but you know the part you want is in there, and crucially where to find it.£1000 is fanciful. My opinion? It's worth whatever a scrap dealer will give you. Or maybe someone who works with old tech (arcade / vintage computer repair guy?)I'd maybe go as far as £100-200 for something like this if I knew there were parts I wanted in there, but going in completely blind with the possibility of getting a ton of 74xx and a few decent parts?Well, If this were an auction I wouldn't be putting much more than £60 on the line.And that's not thinking of the weekends spent sorting it all out...

author: grumpydoc
author_rank: Super Contributor
timestamp: December 13, 2016, 09:19:26 am
content: Quote from: philpem on December 11, 2016, 03:05:58 pm+1Much as I like 80's electronics and do a few repairs I would echo the comments aboveUnsorted, soldered pulls - scrap, the only use for anything in that pile would be if there is something really unobtainable but as it is we don't know.74 series is generally still available.QuoteYes, I think I'd be willing to charge only £200 to take the lot of your handsI just don't have the room.

author: nctnico
author_rank: Super Contributor
timestamp: December 13, 2016, 11:23:24 am
content: I can't recall the last time I soldered a chip in a DIP package. Also how good is a chip after 25 to 30 years? It is not like chips don't age due to metal migration and moisture being absorbed into the packages. I'd sell them on Ebay for gold scrap.

author: eugenenine
author_rank: Frequent Contributor
timestamp: December 13, 2016, 01:08:19 pm
content: Separate out by processor family or something. Sell all the eproms together, sell the ram together, sell the 68000's as one bunch, sell the 6800's as one bunch, etc

author: Cliff Matthews
author_rank: Unknown
timestamp: December 13, 2016, 02:42:19 pm
content: It might help if you can post some hi-res pics linked to a photo-share site. Tubes of gold ADC's tend to perc interest...

author: nctnico
author_rank: Super Contributor
timestamp: December 13, 2016, 02:51:51 pm
content: Quote from: eugenenine on December 13, 2016, 01:08:19 pmBut that would have to be done in an ESD safe environment. I'd rather stay away from sorted parts.

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: December 13, 2016, 11:33:27 pm
content: 25 years old - unless you have some obsolete rare in-demand nuggets in there I doubt it's worth £100, let alone £1000. And that's after it's all catalogued.

author: TerraHertz
author_rank: Super Contributor
timestamp: December 18, 2016, 10:22:40 am
content: I too have cubic meters of NOS chips in original rails. Some really high quantities of some types, the rest a few tubes or part-tubes of each.The differences:a. It was all free originally - being dumpstered as obsolete stock at a manufacturer I worked at over a decade ago.b. I know there's no point trying to sell it. Just not worth the hassle, and probably no interest anyway.c. I like to keep it - every now and then I need some part, and usually it's in there somewhere.d. If I ever did need to get rid of it, I'd offer it for free, just pickup in person and take the lot.One thing I'm short of, is ECL. Considering that a lot of old gear uses ECL, my tiny box of ECL spares is pathetic.HC too.

author: Jay1011
author_rank: Contributor
timestamp: December 18, 2016, 06:03:09 pm
content: Just a thought for those with stocks of 80s era parts looking to get rid of them -- the guys who repair 1980s-era arcade games (the ones in the big cabinets you paid $0.25 a play for (in the US) when you were a teenager, like Donkey Kong or Defender) seem to have a need for this kind of stuff. Most of those games are built from DIP parts, mainly 74xx series that still would be available but perhaps expensive due to low volume, but also some less common SRAM, EEPROM, and other types of parts that I suspect are not easy to come by these days but might be in your collection.