[sebhc] Diskette termination

Paul A. Pennington paulpenn at knology.net
Tue May 22 10:28:52 CDT 2007

    Carroll said:

>I have the drive manuals for the Siemens FD100 diskette drive. It (along 
>with the schematic) shows the termination resistor pack with 330 ohms going 
>to +5 and 220 going to ground. However the termination resistor packs that 
>were in the drives when I bought them on ebay are 150ohms to both +5 and 
> I haven't been able to find any 330/220 resistor packs in any catalog I 
> have. Does anyone know which is correct?

    The 150 ohm packs are for the more common Tandon floppies.  Somebody 
switched them.  I have several of the 220/330  packs in my parts box and 
would be glad to mail you one.  Send your snail mail address off-list.

    Part numbers on mine are:

    Beckman 899-5 R220/330
    CTS 760-5-R220/330
    A-B 314E221331
    Bourns 4114R-003-221/331
    Dale MDP-1405-221/331G

    Notice a pattern here?  :-)

    Paul Pennington
    Augusta, Georgia

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