Free stuff, collection only, Loughton Essex UK - Page 1
Forum section: electronics / general

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: April 24, 2018, 04:48:16 pm
content: Having bit of a clearout - some free stuff forcollection only.Alesis stereo PA amplifier board & heatsink (see pic) - looks to be from a 3U rackmount amp, guessing around 800-1000W total with transformer - was working last time I used it. I think the transformer winding for the preamp may be a little high and needs regulating down.1000W xenon discharge lamp from projector with igniter and fan housing (see pic) - needs beefy DC supply to run. Probably not many hours on the lamp but enough for messing about with.From this projector :Mailroom x-ray cabinet - fully working but needs camera focussing/aligning. Potential for use with an SLR and cassette screens ( some included). Needs at least an estate car to move.

author: TopLoser
author_rank: Unknown
timestamp: May 02, 2018, 04:18:22 pm
content: Mailroom x-ray cabinet accidentally fell into the boot of my car earlier today.Thanks Mike, now to try and make it fall out...

author: Acecool
author_rank: Regular Contributor
timestamp: May 03, 2018, 02:43:27 am
content: The glue gunk is probably from a warranty / repair of the unit.... Instead of replacing the entire board - which can be expensive, they simply rerouted the broken segment through a new piece... Cheaper, and it works.... The customer would get their unit back quicker, and if they're using it commercially then that means less down-time, less money lost... so it doesn't surprise me they did it that way...Now, why didn't they just replace the board - well, new units at $40,000 - not many of them were made, and there probably weren't many spares made as a result... Typically a small percentage of production is set aside for replacements... They could've run out, or they could've simply not made any and the customer needed it right away.... Or replacing the board would've been really expensive and the customer opted to do the hack fix instead... Maybe the customer did it themselves...There are many viable options as to why it is the way it is..If you can look at the others which have that area exposed, then look at what was added - see if the piece added reflects a segment below - that'll confirm it was a repair...Honestly, if you're giving this away - I love keeping things for collections... I have several tec/k/?tronic wax printers at my Charleston home... I tried fixing them a while back but I didn't possess the hardware knowledge I do now, but mechanically they were perfect - but some of the electronics had an issue causing mischief... or the rubber dried up so it was feeding too many sheets, or not picking them up until later...The printers are really cool - they print a reverse image onto a large silver spindle and then they press them onto the paper as they come out - the image quality is quite good - not quite photo-quality, but really good for ads, etc.... The thing though, since they print in wax, you can scrape part of it off and it then looks like someone drew the ad, photo, or whatever, using crayon... The wax is high-heat so there isn't really an issue of it melting - and we had 100 degree weather so...If you're parting the units out, I'd hate to see them parted out, but if that's the case I'd love to have some of the blower fans, and a DLP chip or setup and prisms - they'd be fun to play around with... the motors wouldn't be a bad idea because I am working on a project / design for a new 3D printer design.....But - PLEASE DON'T part them out - if you can help it..... Right now they may not be worth much because things have moved on, but I guarantee in 50 years or so someone will want to go back to basics / roots and will want one - or I wouldn't be surprised if a technology evolution museum is opened somewhere and they'd want it...I don't know if I have enough room to host one of these contraptions ( actually above my TV there is a deep shelf I could put one in for storage if you wanted a place to hold it )... But I am in Hendersonville NC at the moment..As much as I'd enjoy it - I'm sure there's an enthusiast on this site which specializes in projectors ( and despite my running a projector in our theater in Canada when we fired our projectionist for cheating hours when I was a kid - film / platter - 3 platters... it was really easy to splice the movie together, take it apart, etc.. and run the film through the projector - In short, I'm not really an enthusiast specializing only in Projectors - I try to learn as much as possible all around )... In short - I think someone else would be incredibly thrilled to own it - much more so than me, especially as I don't have the time to play around with it and I'd hate for it to collect dust or go neglected.......Question - the arc bulbs - how do they fail? The bulbs we used went off like a shotgun being fired if they were left to run until death.... Also any fingerprints would cause the finger-oil to boil and break the bulb...The x-ray however would be an interesting thing - but it already found a home :-) - I have a broken neck, back and severe nerve damage - so I'd use it irresponsibly and point it at myself to see exactly what happens when especially since going to doctors is hell just to get an image....Anyway- thanks for posting these!