[sdiy] tl ic question

[David Ingebretsen]

Get the Tempco resistor from MagicSmoke or the Bridechamber. Precision
Resistor also sells some values in small quantities.

You don't have to use a special tempco resistor here. Its purpose is to help
stabilize the oscillation frequency of the filter if you are going to use is
as a VCO.

Here are a couple of photos of my build. The bottom photo shows how I
mounted the tempco. I used a small zip tie around it to make sure it stayed
seated against the IC.

www.xmission.com/~dingebre/page6


David

David M. Ingebretsen M.S., M.E.
Collision Forensics & Engineering, Inc.
2469 East Fort Union Blvd. STE 114
Salt Lake City, UT 84121
www.CFandE.com

801 733-5458 Office
801 842-5451 Cell

dingebre at CFandE.com
dingebre at 3dphysics.net



~~ -----Original Message-----
~~ From: synth-diy-bounces at dropmix.xs4all.nl [mailto:synth-diy-
~~ bounces at dropmix.xs4all.nl] On Behalf Of mailing gigaspeeds
~~ Sent: Saturday, July 11, 2009 1:48 AM
~~ To: 'synthdiy DIY'
~~ Subject: [sdiy] tl ic question
~~ 
~~ *
~~ Hi,
~~ 
~~ Just starting out and have a couple of questions concerning parts (again
~~ :p ).
~~ 
~~ the TL series... there's TL072CP/CN/IP/BCN etc... a bit confusing for a
~~ beginner :p
~~ 
~~ For the mankato filter I need for instance tl074BCN but the store where
~~ I order stuff only has the : TL074CP ... Is it ok to substitute it ?
~~ Where lies the difference, or what is the most important value I have to
~~ compare in a datasheet to see the difference ?
~~ The low noise model (IP), does it really make a difference ?
~~ 
~~ I also can't seem to find the : tempco (or temco) 2K +3500ppm/C°, do
~~ they have alternate names maybe ?
~~ 
~~ as usual, thx for the help !
~~ 
~~ Benjamin
~~ *
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