WLIM%MIT-XX@sri-unix.UUCP (10/20/83)
From: Willie Lim <WLIM@MIT-XX> I am trying to replace one of my Tandon TM100-1's on my PC with two new "slim-line" Tandon TM55-2's (aka TL55-2 ???). However there are two problems. I don't have the accessories for mounting them one on top of the other. There seem to be enough clearance to mount them that way (height of TM55-2 is 1 9/16 in. and that of the TM100-1 is 3 9/16in.). However I have to be careful to leave enough clearance between them to accommodate the microprocessor that is on the top of each drive. The other problem is that the power surge of the TM55-2 might be too much for the PC power supply. Tandon suggested that I use the TM50-2 instead since it is directly compatible with the TM100-2 in functionality and power supply requirement. Has anyone out there installed the TM55-2's on their PC/XT? I'll be interested in your solutions. Replies will be posted. Willie -------
WLIM%MIT-XX@sri-unix.UUCP (10/21/83)
From: Willie Lim <WLIM@MIT-XX> Here is what I got from the local Tandon sales office. The TM55-2 (which uses a Hall effect motor) has a current surge of 1.4 A for 50msec. The person I talked to said that it can be as high as 2 A. For the TM50-2, the current surge is 1.3 A. and he said that it is probably less (around 1 A). The steady state current for the TM55-2 is 900 mA and for the TM50-2 it is 800 mA. I got these numbers over the phone, the data sheet is being sent to me. He made a claim that two TM55-2's draw as much current (not sure if it is surge or steady state) as a Winchester. So his advice is: if your power supply can handle a Winchester then it can handle two TM55-2's. I don't have the numbers for the power supply of the PC and hence cannot say if he is right. Regarding mounting the TM55-2 one on top of the other, his advice is to use two side screws on one side only instead of on both sides of the disk drives. Brackets (costing about $3.00 a pair) are available from mail order places for mounting them. There is enough clearance in the PC for mounting them with a small (guess: 1/4 in. to 1/2 in.) gap separating them. This is important if you have the TM55-2 since the microprocessor on top of it prevents two of them to be stacked directly on top of one another. Rumor: He also said that the trim-lines will be used in the Peanut. It'll probably be the TM50D (or was it TM55D?) a direct drive version of half-height disk drives. The TM50's and TM55's are currently belt driven. Willie