Electronics Forum / Equipment / January 2004

Anyone know where I can find a Philips IC
#OQ 0049 ? It's out of a Philips pm3267 scope.
Phil J

I'm looking to buy any "Electronic Experimenter's Handbook" magazines.
These where published twice a year by PE (Popular Electronics) between
the 60's, 70's and 80's.
If anybody has some of these laying on the shelf collecting dust, no

I want to pipe music throughout a building using a 70-volt,
"constant-voltage" PA system. The amplifier has mono inputs and outputs.
I want to use a standard stereo CD-player as the source.
What is the simplest way to mix the two channels into one so as to avoid

HP 6236B Triple Output Power Supply for sale (USA only).
0 - 6V @ 0 - 2.5A and 0 -/+ 20V @ 0.5A.
Separate meters for voltage and current.
Real nice test bench power supply.

Greetings all.
Can anyone recommend a source (preferably U.S.) for tips for a Weller
MLR-20 soldering pencil?  
I got this from a surplus dealer with a WECP-20 base station.  The set

Hi all ,
I need a used spectrum analyzer . I am looking for a tektronix 2710 or
Tektronix 492 SA .
I will use it to design and test RF equipment for radio astronomy

Hi - I'd like to get a soldering station. Unfortunately - I'm a student so
I have very little spare cash lying around. I was looking at the Hakko 936
soldering station: http://www.kiesub.com/hakko936.htm. What do you think?
And is it necessary to get an ESD safe one? Most of the ...

I think I understand the purpose of PA wiring: increase impedance and voltage
over the speaker runs to minimize the loss percentages. I'm unsure, however,
how to adjust relative volume at each speaker due to difference distances
from the amplifier.

When I record TV programmes, the only way I can have both pictures and
sound on the tape is to leave the TV on, tuned to the desired channel
and recording using Line 1 input of the VCR. If I try to record using
the channel pre-set in the VCR, all I get is the picture. I just moved

I'm sorry for crossposting, but I need fast infos if available.
I've the opportunity to acquire for a good price a not so young
Rohde&Schwartz spectrum analyzer :
Polarad 632C-1

To do hi pot test on IT equipment such as Desktop PC, Monitor etc..what
leakage current limit should I set?
And for Arc setting as well.
I had a machine that failed Arc at about 1KV DC and when I reduced the

I have some trouble with an old Tektronix 326 oscilloscope. The problem
seems to be around the CRT.
Any information or better the scheme of this area of the scope will be very
appreciated

I recently evaluated half a dozen low cost pcb softwares and purchased
Circuit Creator.  In less than 3 weeks, I have successfully designed
couple boards.  The software demo can be downloaded or software can be
purchased from following site.

I bought a HP 721 PS on Ebay for thirty something incl S&H, does a
whopping quarter amp at 30VDC, and uses all germanium devices, even
the rectifiers, which are 1N91s I believe (they're not the original
GEs, but they're marked SD 91, and are in the old top hat package).  I

I got two Power Designs PS-2005A Precision sources from two different
sellers on Ebay, and they both work, somewhat.  They put out up to
20VDC at a half amp, so they can serve as a power supply.  They're
real old, made back in the early '70s so they're an all discrete