Anybody have any OP-05, OP-17, or HA2-2600 they want to sell, or know of anybody
who does?  I need the versions in the "can" preferably.

Thanks.

Syd
ana…@logwell.com

After I found the mythical LM321 Precision Preamplifier in the National Semi
book, I was browsing through a 1992 TI analog book and came across the TL010
Adjustable Current mirror.  Another very interesting part, I thought.  TI
disclaims any knowledge of it on their website today.

Was it ever manufactured or was the data sheet a trial balloon to see if
they’d get any orders for it?

Are there any other manufacturers who make (fixed or adjustable) 3- or
4-terminal current mirror ICs?  Yes, I’m fully aware that it’s trivial with
a dual transistor (or two discretes or two transistors in an IC array), but
this one — and the fixed ratio counterparts TL011, TL012, TL014, and
TL021 — has well matched transistors with obvious good thermal tracking.

    Norm

Another interesting item I found in the old data books was the LM13600 Dual
Operational Transconductance Amplifier (OTA) which looked like it could be
used to make some useful circuits.  According to National Semi’s web site,
it’s been obsoleted [I didn't even know that obsolete was a verb!].  Are
there any other manufacturers making anything like this?

Norm

I’ve been working on a project that would recharge the battery of my Honda
Insight (a hybrid vehicle) while I’m parked at work using a solar panel.
The Insight’s battery pack averages around 165V during usage.  Currently I
have the solar panel constantly charging a 12V battery with an appropriate
charge controller.  The battery is then connected to a 12Vdc to 120Vac
inverter, which is connected to a 120Vac to 220Vac converter, which is in
turn rectified to 220Vdc.  I actually only get 200Vdc in the end, I guess
just due to inefficiencies.

I’m trying to design a current limiter that would only allow as much power
into the 165V battery as is coming in from the solar panel.  The panel is
80W, so after it’s been stepped up to 200V, the output current is 0.4Amps
(200V * .4A = 80W).  Thus, I want to implement a current limiter that will
only allow 0.4A into the 165V battery.

The main issue I’m dealing with right now is understanding how two power
sources interact with each other in the same circuit.  Specifically, I have
a 200V source charging a 165V battery with 0.4Ohms internal resistance.  So
is that exactly equivelent to setting up a circuit with a 35V source
(200V-165V = 35V) and a 0.4Ohm resistor?  I set that circuit up in PSpice,
but it doesn’t seem to account for the two DC sources interacting with each
other.  Any thoughts?

Hi,
   2 Motorola transistors(output transistors on Power amp) of my very
old Tandberg audio amplifier TR2025 MB – M 651 BD610 , M 641 BD609 are
spoilt.? A technician tells me that the production of these are
stopped and to not put replacement(of chinese make?) as they blowout
soon. Is he right…i should dump my amp?
  Or is it possible to get OK replacements?I listen to rock music at
fairly low/med. Volume.Thanks
Ed

I used the AMD TAXIchip some ~14 years ago, but it seems to
have been obsolete for some time now. Is there a current
equivalent? I was looking to replicate 8 LED indicators
and it would be nice to use fewer than 8 interconnect wires
over the distance with a one-chip solution at each end.
I don’t actually need anything like the frequency response
of the TAXIchip — 10-20Hz per LED would be enough.

–
Andrew Gabriel

If anyone is interested in obtaining MK-484 AM/SW radio receiver ICs,
they can be obtained from Amazon Electronics
(http://www.electronics123.com) for 90 cents a piece, and from
http://www.angelfire.com/electronic2/index1/index.html for about $1.50
a piece.

If this helps anyone, please pass this posting on to other relevent
newsgroups.

Thanks.

Art

 I’m looking for an RF amplifier module that can deliver
 2 to 3 watts into 50 ohms, over a 20 to 80MHz (or 120
 or 150MHz…) range.  Variable gain isn’t required, but
 would be a plus.  My budget price is $100 but higher
 is OK.  I’ll get 5 pieces to start, more if necessary.

–
 Thanks,
    – Win

 (email: use hill_at_rowland-dotties-org for now)

I had to change my GPIB card from a 9914 to a 7210.
Need to rewrite all my 9914 bit-bang control software
for the 7210.  I have both the chip specs, but there are always
gotchas.

Is there a cookbook to help with this process?
As I recall, I spent weeks on the 9914 code tripping over
details that I thought were outside the scope of the tiny
subset of GPIB that I implemented.  I’d like to avoid this
on the conversion.

Also looking for a reference design for an RS-232 to GPIB converter.
Again, only need a tiny subset of GPIB and want to add some
additional data pre-processing while I’m at it.  Buying a commercial
box won’t let me do that.

Thanks, mike
—
Return address is VALID.
Wanted, 12.1" LCD for Gateway Solo 5300. Samsung LT121SU-121
Bunch of stuff For Sale and Wanted at the link below.
http://www.geocities.com/SiliconValley/Monitor/4710/

Ebay Item number: 3844192510

Yeah, I looked closely and they’re separate headers and caps, so you can
assemble your own!  Of course the hermetic seal might be a problem..

Doubtful that one will get any bids.  Especially since this dizzy dame
doesn’t accept paypal.

–
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###Got a Question about ELECTRONICS?   Check HERE First:###
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Don’t be ripped off by the big book dealers.  Go to the URL
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