Recent content by Alsilisk

Its also worth noting that some high end machines (IBM really liked it) use ferroresonant transformers with a capacitor winding as a first stage of the power supply, these do depend on line frequency and if powered with the wrong frequency it could very possibly damage your later stage...

I am looking to get rid of one of my IBM AS/400s specifically a 9404 model. No charge other than you have to come and get it, I am located in south England near Portsmouth. It is cosmetically reasonably acceptable. It comes with a full complement of cards and one disk drive as well as a tape...

If you want to make useful dumps, do not convert them to ASCII. It is a one way process. So great for looking at but useless if someone else wants to use them on a machine that uses EBCIDIC. If you are going to stick them somewhere for someone else, please provide dumps in both EBCIDIC and ASCII.

Hi all, I am looking for an IBM terminal controller that can interface to coax devices with the type B standard. These would be 3272, 3274, 3271 controllers. Thanks, Al

Hi all, I need some bus and tag cables for a project of mine, due to the weight I only want them if they are being shipped from the UK, the US will be too expensive. Ideally I need 4 cables, two of bus and two of tag. If you have even one cable lying around please do let me know and we can...

Hi all, I recently picked up an IBM 2671 paper tape reader and I am slowly restoring it. One thing that is not right with it is one of the switches on the front panel it is broken and very rusted (to the point where the actual switching function of it does not work) . If anyone has a spare...

hi, I just have an empty compact mac case with its CRT tube and that is it. No screws or metal chassis. Ideal if you want a donor unit for a CRT transplant. PM for more details. I am giving this away for free, provided you come and pick it up. (south England) thanks, Al

found this and thought it would be interesting: https://www.ebay.com/itm/265064917329

Hi, Looking to sell one IBM AS/400 9404. This is the deskside version and has a nice complement of cards. The only issue is the power supply is not functional but it is only a RIFA issue so can be fixed very easily. It comes with one drive and it doesn't appear to have an OS on it when I test...

Hi, My friend gave me an HP 175a oscilloscope to repair. But this isn't what I specialise in and not really keen on playing with this stuff at such high voltages. He did have a crack at it and gave me a few spare parts which he had, capacitors and spare tubes mostly. This is a hybrid scope...

hello all, I was just wondering if anyone wanted to shift a keypunch in the UK area. I am expecting an 029 if anything as 129s are rare and 026s are less rare but still not all too common. I don't mind either way. If you want to sell yours PM me. Another note of discussion. What did happen to...

Hi, How much would people pay for a 21-MX these days? fully working and it has ECC memory (512KW) and a decent complement of IO cards. I bought it in 2016 and prices for things have changed a lot recently, so just curious about it. Thanks, Al (sorry if you shouldn't do price checks here)

Hello, I recently picked up some AS/400s from WBST and have been reasonably successful. However I am new to the AS/400 series and have no real idea of what each card does and how they should be formatted in the cage other than how they came. Not to mention the fact that it fails its self test...

hi, Just looking for a copy of SEL 810A/810B OS for a friend if anyone has a copy or a link PM me. I don't expect much it is a pretty obscure computer but you never know with these forums. thanks, Al

Hello, While I understand that is frowned upon and for that I am sorry. Some background: I have been collecting for a while mainly HP minicomputers and similarly sized systems and this is all thanks to my grandfather who inspired me to do this, as he was a 1401 and later 360 operator and...