Electronics Forum / Equipment / January 2004

I allways wondered how dc/ac power inverters work ?
Do you really get more power than what you put ?!
I saw inverters that's supplied with a 12VDC and will give 7000 W !! How come ?

I found some replacement lamps for the neon lamps that are in the HP
power supplies that I got off Ebay.  They're distributed by Linrose,
the company that has those lousy LED displays at Fry's.  I bought a
regular red neon for $3 something, but the green neon is about $5, and

I just purchased a 1990 Pace Arrow motor home and discovered a problem
with the Onan GenSet.  The first night I tried to start it it wouldn't
start -- slow turn over.  This morning I hooked up a DVM to the
batteries and it was about 12.03V without any load and with the shore

I have several doubts regarding subwoofer and its amplifier
-1- What is the basic difference(in construction,working and
performance) between a subwoofer and an ordinary woofer ?
-2- When was sub woofer first introduced ?(And who introduced it ?)

I just sent them my 21st request to stop sending me catalogs. I started
requesting them to stop somewhere around 10 years ago.  If you ever get
on their catalog list, they will send you anywhere from 5 to 10 copies
of each issue.  They're apparently braindead.

Yet another scope in trouble ...
HP 1222A. Has always been working fine, but recently (after a longer
pause) it suddenly has developed a "sawtooth" baseline.
- periodicity ~9 ms, int'y ~1 graticule

I have a UMAX Astra 2200 scanner that has stopped working. The power LED
flickers,
but won't stay on solid. The User's Manual says this might be caused by
failure of the

I am preparing for a mobile, mid-range RFID project. It involves
reading up to a dozen or so tags with a portable or hand held device
in a range upto 2-3 meters. The data transmission doesn't have to be
fast, but there may be more than one readable tag within reading zone.

Hi there, I am trying to understand more about High Frequency RF
measurements of Bipolar Transistors.  I have a question about
measuring Ft.
Ft is defined as the frequency for which the magnitude of the AC

I am looking for an HP frequency counter for my work bench.
I would like to find an HP 5328A or similar in good working condition with
the 500 Mhz or better prescaler / channel C option.  Pluses would
be the high stability option and the DVM.

Does anybody know where the VGA cable gets connected (and the pinout)
inside the monitor? Thanks.

Looking for Service manual for Singer SG-1000 Signal generator
remove the _nospam_ in your reply

Does anyone have a reference/service/maintenance manual available for
the 6-digit DMM "Solartron 7150" (Schlumberger, ca. 1989)?
Specifically, I'm looking for the following information:
(1) function of the "special" keys on the keypad

Hey, I am in desperate need of the service and the operators manual for the
Tek 2465B scope, Mine started flashing an error code last week and all
atempts to find the original manual have failed, dont it make you mad when
you loose your stuff! anyway, please help! I need it in a bad ...

alright here's what I am wanting to do I want to put leds of different
colors in the bezel of my computer case I want them to randomly flash and if
possible to be powered by the 5v output on my power supply I am not sure how
to do this if anyone has any ideas could you email me and ...