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| subject: | Re: Dead system |
-=> ROY J. TELLASON wrote to RUSSELL TIEDT <=- RJT> For that price I'd buy one too. But my cartridge isn't of the magnetic RJT> variety, it's ceramic, so what preamp is needed is just a matter of RJT> impedance matching more than anything else. Ceramic is HV high impedence IIRC so a pair of op-amps one for each channel ought to do the trick. You need to scale down the input by selecting the proper input and and feedback resisors that meet at the summing point. Inverting op-amp configeration. Sorry my copy of the OP-AMP Cookbook didn't manage the last move with me. RJT> But first I gotta get the software working! RT>> Right now I'm in the middle of browsing a whole mess of README RT>> and HOWTO files plus there are assorted doc files that came with RT>> the burner, pdfs and all sorts of other stuff. Perhaps tomorrow RT>> if I get the energy I'll be able to get some hardware swapped RT>> around and at least make a start on geting the software side of RT>> things going... Right now I've a sea of loose computer bits and pieces strewn all over the place. Hey I've found an _advantage_ to software modems and sound cards!!! They just sit there dead in their PCI slots not in the least interfering with the Win 3.1 software and leaving everything accessable to my ISA cards :-) RT> Got the hardware part of it done, anyhow. Hardware is easy. I need to put that suspect RAM stick into the old 486 box and see what it posts to extended memory and see where that problem was from. I may in future depending on the result of above procedure try removing the HS UART from this MB's serial port and putting it into the old board. Don't know if my current skills and eyesight are up to the task however do know I'll need a solder sucker. RJT> Yeah. Now all I need to do is figure out why it won't run! :-( Details, work for the government and this isn't a problem ;-) --- MultiMail/PBellDOS v0.42* Origin: FidoTel & QWK on the Web! www.fidotel.com (1:275/311) SEEN-BY: 633/267 270 @PATH: 275/311 10/345 379/1 633/267 |
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