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About IIfx

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  • Location
    VA, USA
  • Interests
    Computers, Telecommunications, Photography, Aviation

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  1. Were all of the axial caps replaced with high quality japanese caps? My IIfx wasn't quite right until those were replaced as well as the SMD caps. The IIfx is the only Mac I know of with dual sets of pads for every cap; axial has SMD underneath, SMD electrolytic have a 2nd set of pads for SMD tantalum.
  2. Unfortunately there is no System 7 MP3 player that can use the DSP's. From my understanding no such thing exists because there is little to no documentation regarding how to develop of the Radius implementation of the AT&T DSP. The effort to build such an app would be tremendous. Running a regular MP3 player on a Rocket results in system crashes due to the weird issues Rockets have with sound. I can scan/photograph the SCSI StageII booster for you; I have been very busy lately but will try to remember to do that.
  3. Late reply, but I will explain. The prior owner of my IIfx was a power user. I had obtained a large number of Radius Rocket cards in that lot. This was the haul: I decided that it was irresponsible for me to hoard all of the Rocket cards for myself, given the rarity. If something were to happen to my collection due to a natural disaster or theft the cards would be lost for good. So I sold some off to members here who appreciate them as much as I do. Trash80 got my only other SCSI-II boosted Rocket. I had 2. I still have 1 StageII with SCSI booster, 1 StageII with DSP, and a plain 33mhz Rocket with DSP.
  4. IIfx

    Mac II // IIfx info

    The IIfx PDS card was never really used in a major way. There is an unobtanium 040 accelerator upgrade that required a motherboard chip replacement to work. There is also a SCSI card for the IIfx PDS if I can remember right, but good luck finding one. That slot was an evolutionary dead end, unlike the rest of the II series with PDS slots.
  5. I managed to get by with a single iron and desoldering via desoldering braid. Remove the solder on one side of the component, then heat the other and gently pull once the solder is liquid on the remaining side. Works every time.
  6. It appears to me to be a Vishay 10uf 16v tantalum cap. 10uf 16v is a common Mac logic board cap value. It's a little worrying to see all these recent spectacular tantalum failures. The meme of "tantalum is good forever" isn't holding up.
  7. If your worried about fire, an arc fault interrupt breaker may be of value. These trip if an arc condition is detected in the circuit.
  8. Centris 650 is a middle-high end machine, a Quadra without the FPU and clocked at 25mhz. In all other ways it is the same as a Quadra 650 or a Quadra 800. Not junk. Q800 was high end, Quadra 650 was the upper portion of the middle high end. Q840AV - Highsst end once released in 1993 Q950/Q800 - Top end in 1993 Q650 - Middle high Q610 - Middle Q605 - Lower middle
  9. I killed a Quadra 800 motherboard with a MacClip 40mhz overclock. The CPU survived but the SCSI controller failed.
  10. IIfx

    Macintosh IIFX

    No difference between the ADB on button and the logic board on button. The IIfx requires two good PRAM batteries to start up, otherwise you will need to perform a "jump start" procedure by shorting a certain pin off of the power supply. I cannot recall which pin is the one you need to short to jumpstart without fresh PRAM batteries. That Mac has a very sad story attached to it; was the hobbyist a member here perchance?
  11. IIfx

    Macintosh IIFX

    The Apple 8*24GC is a very nice video card. It's actually designed to go with the IIfx and supposedly has some special speed advantages when used in one. I have been looking for one for a while. For now my IIfx has an Apple 8 24 AC which is a rebadged Radius Precisioncolor card. Be sure to replace the two PRAM batteries on the logic board and inspect the capacitors for leaking. The two SMD electrolytic caps on the back right corner of the logic board tend to leak. Most IIfx boards are 90% tantalum capacitors, but some may have a higher ratio of electrolytic caps. I had to recap mine to make it run stable.
  12. IIfx

    Macintosh IIFX

    The Macintosh IIfx shipped from the factory with 1 or 2 1.44mb Superdrives only. Are you sure that IIfx has an 800k disk drive? If so it's probably a retrofit original Macintosh II with a Macintosh IIfx logic board. Normally the upgrade from a II to a IIfx or IIx would include a new 1.44mb Superdrive. If it has an 800k drive then it was probably a hobbyist retrofit. If it indeed is a IIfx with an 800k drive you can swap it back to a 1.44mb Superdrive no problem. Do you have any photos of the machine on craigslist? A IIfx with an ethernet card can talk to modern systems via FTP, or even HTTP. So there is another avenue to moving files over beyond floppies or other disks.
  13. Interesting that a Toby card is being used in a Q700. It belongs more in a Macintosh II, IIx, or IIcx. Such a fast Mac like a Q700 should have a nice Quickdraw accelerated card occupying a nubus slot! The mounting for the speaker looks identical to the IIcx/IIci.
  14. IIfx

    IIci processor replacement

    You will need to replace some clock crystals to get the CPU to run at 33mhz. No guarantee that the motherboard will be able to handle other components linked to the CPU clock crystal at 33mhz.
  15. IIfx

    Revenge of the Clones

    The clones were indeed slowly killing Apple. Instead of taking the low end the clone machines were killing the margins Apple had on the high end. Letting clone manufacturers build machines nearly exactly the same as the top end Macintosh lineup was foolish. There was little differentiating the clones and the Apple originals. Often the clones had better cases than the awful brittle plastic ones Apple used at the time. Steve did the right thing. It hurt the clone partners but it had to be done.