Electronics Forum / Equipment / September 2003

I have a pair of 'home made' Radford Monitor 1 speakers (I think they
are monitor 1s anyhow)
They have genuine Radford driver units, but the left speaker seems to
have problems with its midrange drivers.

Hi all, anyone knows if it's possible to isolate (in optical way) a
single wire or a couple of wires?
It should be something that I can put on my PCB and on one side there is
the IN-wire (comes from outside), and as output I've a wire that is

Why is there usually a capacitor connected between two connectors of
some instruments such as a voltage supply, or between the supply line
of a breadboard and its groud plate?
Thanks,

Hi I am after any older Microprocessor development boards ..usually pre
1980's based on any of the micro's from thate era 8080/8085, z80,
6800,6502,6809,68000,TMS9900, z8000 etc ..Plus any of the books on them
or intrefacing or programing/using them ..

Hi!!!
I am electronic engineer, ans I am trying to do an interface between a
PIC16F877 and a compactFlash WinTec 32MB. I am using MPLAB to do that,
but I haven't been able to write and read data from and to the

I'm hoping to save energy by replacing my current PS with one which has
Active PFC.  But before I do, I'd like to figure out if it's worth while.
How do I determine how much energy is currently being used by my computer?
The company how's product I'm interested in purchasing is ...

I am looking for a low cost GPIB controller, with USB connection to the
host. I know NI has one, but I'm looking for lower cost alternatives...
Thanks,
Robert

I have a Fluke 8012A multimeter, and it now displays "BT" and all
segments of the numeric display.  I believe it needs a new battery,
but I don't see one within the unit that's apparent.  Anyone know how
I can obtain one?  Thanks.

Has anyone tried removing the carrying handle from a Tektronix 2211
(or similar) 'scope? It's the one that just pulls out under tension,
and has a circle of lugs that locate into the main body.
I'm trying to stack my equipment up and the handle is a pain!

I have just been given a "Biddle Versapot", model 72-311.  My question is, wtf
is/does this thing do?  It's panel says "calibrator/potentiometer".  I haven't
had any luck with searching the net, so I thought I'd ask here.  Thanks.
James G. Biddle Co.   Plymouth Meeting, PA

Does anyone know of a source for the leather handles that used to adorn the
old tube-type test equipment from HP, Tektronix, etc.?  Hoping to find a few
to replace broken/missing handles on some of my instruments.  Also hoping
that if there are a few to be found, that I won't have ...

i would like to develop a dongle for pda as my school project, can
anybody give me some information about that?
if somebody can help, please let me know.
Thank you very much in advance!

On ebay: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2560905448

Recommendations for a good analog o-scope repair/calc shop in Fort
Worth, Dallas, or Waco TX?
Thank you,
Lance

I have a Tektronix 485 in the shop. The repair bill could be as high as
$300. I have been offered a B&k 1590a for $380 . I do not know the B&K
and have never owned one of their scopes. I like the 485 but it is pretty
old. What should I do-fix or buy the B&K?