audio recording on IC -help wanted

[TT_Man]

<administrator@datasheetarchive.com> wrote in message
news:1190994149.286815.81310@57g2000hsv.googlegroups.com...

On Sep 28, 12:33 am, Jamie
jamie_ka1lpa_not_valid_after_ka1l...@charter.net> wrote:
mot wrote:
Hi Everybody,

Im looking for a position sensing potentiometer that has a hole in it
where the shaft would be. It is an ordinary potentiometer but does not
have a shaft - it gets slipped onto a shaft. If any one could help me
locate such a thing I would be grateful.

Friendly Regards,
Mot

Use "Hollow shaft Potentiometers" with google.



These may be what you are looking for?

http://www.datasheetarchive.com/advancedsearch.php?t=0&q=Thru+hole+Potentiometer&manystr=


I don't think so

 

hello ,my friend ,and i think everything goes well to you
by the way ,and i have many new products in my site : http://www.richglorytrade.com
and if u need the shoes ,and u can go to view it ,and choose the model
and size u need ,and tell me the order list ,and i will confirm for
u ,and give u a good price.and i trust we will have a good business in
the future ,
and i am looking forward to ur reply.
my msn: caiguohua790429@hotmail.com
email:caiguohua790429@yahoo.com.cn

 

[John Larkin]

On Sat, 18 Oct 2008 18:07:50 +0100, "ian field"
<gangprobing.alien@ntlworld.com> wrote:

"John Larkin" <jjlarkin@highNOTlandTHIStechnologyPART.com> wrote in message
news:cj4kf49h8e0vih03dcolc8frkfgsgks0sp@4ax.com...
On Sat, 18 Oct 2008 16:26:48 +0100, "ian field"
gangprobing.alien@ntlworld.com> wrote:

.............and others for AGC use.

The result of numerous google searches has turned up conflicting answers,
I'm trying to find out how the discrete transistor AGC stages work in TV &
radio IF strips.

One answer states that varying the base voltage of the controlled stage
varies its input impedance to the previous stage by varying the B/E bias,
the other states that using variable bias varies the collector current -
on
which the stage's gain is dependent.

As hardly any manufacturers still use discrete devices for this purpose
there seems to be very little I can find on this subject, please can
anyone
help?

TIA.



Tube radios backed off the DC grid bias of several stages, uisng a
feedback signal from the detector. Negative on the grids reduces
transconductance hence gain.

Transistor radios worked the same way... reducing DC base voltage
reduces collector current and reduces transconductance hence gain.

The first of the cited "answers" is wrong... reducing base voltage
reduces transconductance and gain of this stage, but also reduces base
input impedance, which *increases* the gain of the previous stage
somewhat.

John



Thanks - any idea where I can find more reading on the technique?

My GE Transistor Manual (7e, 1964) has a few pages on transistor radio
AVC. It's a good reference for discrete transistor design. Maybe
alibris or ebay can turn one up.

Hey, Amazon has it...

http://www.amazon.com/GE-Transistor-Manual-7th-Ed/dp/B000IW9ITE

John

 

[K2LRV]

OK here is a question that I have never seemed to find some at least
good guidelines on. What type of capacitor to use, i.e. electrolytic,
tantalum, ceramic, etc.

 

[52455]

Footwear (paypal payment)(www.yourbestshoes.cn )
Paul Smith shoes
Jordan shoes
Bape shoes
Chanel shoes (paypal payment)(www.yourbestshoes.cn )
D&G shoes
Dior shoes
ED hardy shoes
Evisu shoes
Fendi shoes (paypal payment)(www.yourbestshoes.cn )
Gucci shoes
Hogan shoes (paypal payment)(www.yourbestshoes.cn )
Lv shoes
Prada shoes (paypal payment)(www.yourbestshoes.cn )
Timberland shoes
Tous shoes
Ugg shoes (paypal payment)(www.yourbestshoes.cn )
Ice bream shoes
Sebago shoes (paypal payment)(www.yourbestshoes.cn )
Lacoste shoes
Air force one shoes (paypal payment)(www.yourbestshoes.cn )
TODS shoes
AF shoes





Footwear (paypal payment)(www.yourbestshoes.cn )
Paul Smith shoes
Jordan shoes
Bape shoes
Chanel shoes (paypal payment)(www.yourbestshoes.cn )
D&G shoes
Dior shoes
ED hardy shoes
Evisu shoes
Fendi shoes (paypal payment)(www.yourbestshoes.cn )
Gucci shoes
Hogan shoes (paypal payment)(www.yourbestshoes.cn )
Lv shoes
Prada shoes (paypal payment)(www.yourbestshoes.cn )
Timberland shoes
Tous shoes
Ugg shoes (paypal payment)(www.yourbestshoes.cn )
Ice cream shoes
Sebago shoes (paypal payment)(www.yourbestshoes.cn )
Lacoste shoes
Air force one shoes (paypal payment)(www.yourbestshoes.cn )
TODS shoes
AF shoes








Footwear (paypal payment)(www.yourbestshoes.cn )
Paul Smith shoes
Jordan shoes
Bape shoes
Chanel shoes (paypal payment)(www.yourbestshoes.cn )
D&G shoes
Dior shoes
ED hardy shoes
Evisu shoes
Fendi shoes (paypal payment)(www.yourbestshoes.cn )
Gucci shoes
Hogan shoes (paypal payment)(www.yourbestshoes.cn )
Lv shoes
Prada shoes (paypal payment)(www.yourbestshoes.cn )
Timberland shoes
Tous shoes
Ugg shoes (paypal payment)(www.yourbestshoes.cn )
Ice cream shoes
Sebago shoes (paypal payment)(www.yourbestshoes.cn )
Lacoste shoes
Air force one shoes (paypal payment)(www.yourbestshoes.cn )
TODS shoes
AF shoes

 

[mellery]

I have a TMS1000 and a TMS1400 microcontroller i'd like to read the
roms off of, and reprogram. Does anyone know how to do this? I
haven't found much online about these chips even though it seems to
used to be pretty common.

Thanks

 

hi
We are supplier in china Footwear Apparel Handbags Jeans&Pants Cap
Accessory(world famous brand)
1) Top quality, reasonable price, safe shipping, and best service
2) Sport shoes for men, women and kids with all sizes available
3) Sport shoes with different colors and styles available in stock
4) The material and size can be required to make in accordance with
customers' requests

Price :8-35usd 6-30EURO 5-30Pounds


size chart
Men Size:
US: 7 8 8.5 9 9.5 10 10.5 11 11.5 12 13 14 15
UK: 6 7 7.5 8 8.5 9 9.5 10 10.5 11 12 13 14
EUR: 40 41 42 42.5 43 44 44.5 45 45.5 46 47.5 48 49
Women Size:
US: 5 5.5 6 6.5 7 7.5 8 8.5
UK: 2.5 3 3.5 4 4.5 5 5.5 6
EUR: 35.5 36 36.5 37.5 38 38.5 39 40


Kid's
US: 11C 12C 12.5C 13C 1Y 1.5Y 2.5Y 3Y
EUR:28 29 30 31 32 33 34 35


Clothing Size:
S M L XL XXL XXXL XXXXL XXXXXL


Footwear
http://www.cicigogo.cn
Apparel
http://www.cicigogo.cn
Handbags
http://www.cicigogo.cn
Jeans&Pants
http://www.cicigogo.cn
Cap
http://www.cicigogo.cn
Accessory
http://www.cicigogo.cn
electronics
http://picasaweb.google.com/cicitrade.eleltronics
CiCi
www.cicigogo.cn
MSN:air jordan
Building Material Market, Goutou Denizen Committee, XiaChen Office
Putian City Chengxiang District CiCi Trade Co., Ltd

 

[Rich Grise]

On Tue, 11 Sep 2007 00:35:20 +0000, Drexterity wrote:

A molecular assembler as defined by K. Eric Drexler is a "proposed
device able to guide chemical reactions by positioning reactive
molecules with atomic precision."
Drexler also introduced several related terms, such as "molecular
manufacturing," which he defined as the "construction of objects to
complex, atomic specifications using sequences of chemical reactions
directed by nonbiological molecular machinery", and "molecular
nanotechnology" that comprises molecular manufacturing together with
its techniques, its products, and their design and analysis.

Could it be possible that in the not-so-distant future we could be
able to manufacture our own gadgetry at home?

Heck, you can do it today - just go down to the corner store and pick
up a Scanning Tunneling Microscope:
http://www.almaden.ibm.com/vis/stm/gallery.html
;-)

Have Fun!
Rich

 

[JW]

On Sat, 10 May 2008 16:01:35 -0700 PhattyMo <phattymo@not.net> wrote in
Message id: <4826294b$0$89867$815e3792@news.qwest.net>:

Franc Zabkar wrote:
On Fri, 09 May 2008 11:00:30 -0400, JW <none@dev.nul> put finger to
keyboard and composed:

On Fri, 09 May 2008 07:51:20 +1000 Franc Zabkar
fzabkar@iinternode.on.net> wrote in Message id:
iur6249jf7tva5b2lunkgdjldmlvpcj4jh@4ax.com>:

On Wed, 07 May 2008 13:11:38 -0400, JW <none@dev.null> put finger to
keyboard and composed:

Trying to repair a Keithley 616 with a bad ranging board. It needs two
parts. One is a dual channel J-FET and is marked ITS30092; the other is
an op-amp with the markings ITS6214. Does anyone know of a cross, or even
who the manufacturer is? (Must be before my time...)

Thanks for any help!
I'm guessing they are specially selected Intersil parts.

Have a look at the IT500-IT505 dual N-channel J-FETs:
http://www.datasheetarchive.com/pdf/1824055.pdf

Maybe someone has an Intersil catalogue or databook from around that
time (early 1980s ???).
Thanks Franc, Intersil makes sense. It's starting to look like I'll need a
donor unit.

I would think that you could refer to the schematics in the manual ...

http://www.keithley.com/support/data?asset=5258

... and find a modern op-amp and dual J-FET with much better specs.

See http://www.intersil.com/products/pt/parametric_table_13437.asp

You may even be able to get a free sample:
http://www.intersil.com/samples/index.asp

Here are two dual N-channel J-FETs that may fit the bill:
http://www.linearsystems.com/datasheets/LS843-5.pdf
http://www.linearsystems.com/datasheets/LSK389.pdf

Here are more choices:
http://www.linearsystems.com/products.html#GlossD

You can request samples here:
http://www.linearsystems.com/contact_us.html

- Franc Zabkar

Thanks Franc, but I was never much good at figuring out what specs are
important when cross-referencing other than voltage and current.
Especially with something as sensitive is this piece.

I have a couple donor Keithley benchtop DMM boards.. I can dig them out
and take a look for those parts,if you like.

Thank you for your generous offer, PhattyMo, but I spent a few hours
digging through our "graveyard" and found the pieces I need in another
piece of equipment.

 

I am looking for a source of type TM coax connectors and adapters.

Type TM is a miniature RF coax connector used way back in the sixties
on space programs. The connectors were originally manufactured by
General RF Fittings Division of Solitron Devices in Florida.
Eventually this company became today's SV Microwave. SV Microwave
still lists some of the original connectors on their website, but does
not list any between series adapters converting TM to something useful
like SMA, TNC, or N. I am contacting them to see if they have any
stock but obviously will have to wait until Monday to hear back.

In the interim, if anyone knows of a local electronics surplus house
that has TM female to SMA/TNC/N adapters, please let me know.

Finders fee is a free t-shirt from my employer - a very cool aerospace
company who shall remain nameless.

 

[bubbles123]

I'm trying to design the receiver circuitry for an IR link that
detects 1MHz signals at least 70cm away. Currently I'm using an Optek
photodiode (OP999) with OPA380 as my transimpedance amplifier, an op-
amp after the transimpedance amp to further amplify the voltage and a
comparator to reconstruct the transmitted signal.
At the moment I'm just pulsing a 1MHz square wave through my IR
emitter but the output from the transimpedance amplifier does not come
out square! Can anyone suggest an IC transimpedance amp that will work
for 1MHz signals across an IR link? (the OPA380 has a 1MHz bandwidth -
hence the distortion at the output).
Also, using just the OPA380 with a capacitor (to remove the varying
offset) and a low pass filter I can meet the 70cm requirement. However
with the op-amp and the comparator, I can only get about 20cm (if even
that). Am I missing some fundamental component that is ultimately
causing my receiver to fail?

Any help would be greatly appreciated!!

 

[hhjjkk]

Discount Coach Sandals, Dior Sandals, Prada Sandals, Chanel Sandals,
Versace Sandals, Crocs Sandals, Women's Sandals Men's Slippers From
China www.king-trade.cn
Discount, Prada Sunglasses, Discount, www.king-trade.cn D&G
Sunglasses, Discount, www.king-trade.cn
Fendi www.king-trade.cn
Sunglasses,Discount,Burberry Sunglasses Discount, Chanel Sunglasses
www.king-trade.cn
Discount, LVSunglasses Discount, Dior Sunglasses Discount, (G U C C
I ) Sunglasses Discount, ArmaniSunglasses Discount, Versace
SunglassesDiscount, A&F Sunglasses Discount, LV Sunglasses www.king-trade.cn


For more products pls visit: www.king-trade.cn

 

[ian field]

"mc" <look@www.ai.uga.edu.for.address> wrote in message
newsv9gi.6990$c_4.1098@bignews2.bellsouth.net...

"ian field" <dai.ode@ntlworld.com> wrote in message
news:R19gi.5262$nE2.1789@newsfe3-win.ntli.net...
Does anyone know if Evolube (possibly Elvolube) still exists?

Apparently so:

http://www.ecllube.com/003products.aspx

Haven't found anyone selling it in small quantities, but the manufacturer
can presumably direct you to a distributor.

Yes - my google search found several references to that family of automotive
lubricants, apparently an assortment of grades in a variety of colours.

Mostly extreme water resistance and greases that increase in viscosity in
response to shear (probably not very good for "wiping" contacts!).

 

Do you want access to China's massive pool of electronic
manufacturers... but lack the time to contact suppliers, negotiate
contracts, arrange shipping or monitor product quality? Don't worry -
Let seriouswholesale deal with all that for you.

*Check out the huge range of Gadgets, MP3 / MP4 Players, Car DVD /
Audio, and Computer Accessories now by visiting the online wholesale
catalog at seriouswholesale. com You'll have peace of mind thanks to
the seriouswholesale Quality Control, 12-month Warranty on all
products, and easy secure payment by credit card through Paypal.

Selling on eBay or your own online store? Send products direct from
our warehouse to your customers using our unique drop-shipping
service. You can profit by selling hundreds of different products,
without holding any of your own inventory! Any questions you have will
be answered by the seriouswholesale English-speaking customer support
team... Their aim is to make your China electronics importing business
easier to run than ever before.

Welcome to http://www.seriouswholesale.com.

seriouswholesale - Buy from the source, profit without the hassle.

- 12 Months Warranty - No minimum order restrictions - Drop-shipping
with no additional fee - Pay by safely by PayPal seriouswholesale
Wholesale Co., Ltd.: Chinas original and best online electronics
wholesaler & drop-shipper: seriouswholesale. com

 

Anritsu Sitemasters Wanted

email to:
phillvogel@gmail.com

 

[Joerg]

John Larkin recently pointed out the NE3508 and NE3509. They are really
nice, steep Vgs versus Id and so on. Even better than the BF862 except
for one major obstacle: At >>50c they are way out of league for many
designs. High drool factor, followed by a depressed look at the BOM budget.

Question: Are there similar hotrod JFETs that are in the 10-20c range?

--
Regards, Joerg

http://www.analogconsultants.com/

 

[Mike Harrison]

Has anyone documented the interface /identified the controller on the Ipod LCD, in particular the
5th gen video version..?

Replacement displays are pretty cheap and would be nice to interface to..

 

[Tim]

I saw this neat little circuit on a hobby website that uses this chip.
It is a melody synthesizer that has about 10 Christmas tunes on it. I
would like to get about 5 of those UM3481 chips for projects like that.
I have checked the usual sources, Digikey, Newark, Maplin, BGMicro, EEM,
eBay, but none have it. I know that Maplin had 'em about 3 years ago.

Thanks,

- Tim -

P.S. I filter out all the google mail addresses now, so I won't get a
reply if you post info from there.

 

[Michael A. Terrell]

mike wrote:

Hi to all

I am actually restoring an old SAYROSA 352 B spectrum analyser & I
will need this IC to complete the restoration, could someone tell me
where I could find this MD-614 mixer ?

Thank you

Do you have a photo of the mixer? That was a mil qualified hybrid and a
very ezpensive part, but there may be a surplus replacement.
http://www.wbparts.com/rfq/5895-01-128-3218.html

5895-01-128-3218 NSN Information
NSN FSC NIIN Item Name INC HMIC ESDC CANCELLED NSN
5895-01-128-3218 5895 01-128-3218 MIXER STAGE, FREQUENCY
00334 N


5895-01-128-3218 Master Cross Reference Data
Mfg. Part Number ISC RNVC RNCC HCC MSDS SADC DAC
91498343 6 2 5
MD-614 6 2 3


5895-01-128-3218 Characteristics Data
MRC Criteria Characteristic
BHSX CIRCUIT CONSTRUCTION TYPE SOLID STATE
BHTB FREQUENCY PER CHANNEL 700.0 MEGAHERTZ MINIMUM OPERATING CHANNEL
AND 2.0 GIGAHERTZ MAXIMUM OPERATING CHANNEL
BHTJ AVERAGE POWER RATING PER CHANNEL 300.0 MILLIWATTS INPUT
BHTN IMPEDANCE RATING PER CHANNEL 50.000 OHMS OPERATING CHANNEL
AFSU AVERAGE LIFE MEASUREMENT NOT RATED
AKAE MAXIMUM OPERATING ALTITUDE RATING NOT RATED
AFGA OPERATING TEMP RANGE -55.0 TO 85.0 DEG CELSIUS
BJBP CONNECTION TYPE AND LOCATION WIRE LEAD TERMINALS BOTTOM AND WIRE
LEAD TERMINALS TOP
BJBW CONNECTION CONTACT TYPE AND QUANTITY 8 WIRE LEAD TERMINALS
EXTERNAL
AKNA INCLOSURE TYPE HERMETICALLY SEALED
AMQY INSTALLATION DESIGN MODULE
AGTA BASIC SHAPE STYLE 1 RECTANGULAR OR SQUARE
ABHP OVERALL LENGTH 0.510 INCHES NOMINAL
ABKW OVERALL HEIGHT 0.698 INCHES NOMINAL
ABMK OVERALL WIDTH 0.150 INCHES MAXIMUM
AJKH IDENTIFICATION DESIGNATOR MD-614-21912
PRMT III PRECIOUS MATERIAL GOLD
PMLC III PRECIOUS MATERIAL AND LOCATION TERMINALS GOLD





http://ohiomicrowave.com/inventory.html might be able to find you
something that will work.


--
http://improve-usenet.org/index.html

If you have broadband, your ISP may have a NNTP news server included in
your account: http://www.usenettools.net/ISP.htm

Sporadic E is the Earth's aluminum foil beanie for the 'global warming'
sheep.

 

[robb]

"John Fields" <jfields@austininstruments.com> wrote in message
news:rce0f3l30qp3g21q4lseu6b4ipflr174ns@4ax.com...

On Tue, 18 Sep 2007 15:26:50 -0400, "robb" <some@where.on.net
wrote:


"John Fields" <jfields@austininstruments.com> wrote in message
news:soqve3traoa683sqf45rdksb4t583dinil@4ax.com...
On Tue, 18 Sep 2007 10:49:49 -0400, "robb" <some@where.on.net
wrote:

"J.A. Legris" <jalegris@sympatico.ca> wrote in message
news:1189821362.740966.23170@o80g2000hse.googlegroups.com...
On Sep 14, 8:58 pm, "robb" <s...@where.on.net> wrote:
hello,
I am trying to find a compatible replacement for an obsolete hard
to
find part SN75518N


Try this instead:
http://www.allegromicro.com/en/Products/Part_Numbers/6818/index.asp
Joe


Thanks Joe,
i have same reply as for others...
Perfect suggestion if that chip was not as difficult to get as the
SN75518N

---
You can actually buy an Allegro A6818SEP-T from Digi-Key for 5.06
USD and if you want more than one, they have 3031 in stock:


http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail?name=620-1094-N
D

It appears Arrow also has them:
http://app.arrownac.com/aws/pg_webc?s=P
JF

Well John, how embarassing :}?

but, i 'd rather be embarassed with chip than honored and chipless.
as it turns out i was looking for ucn6818 like the ucn5818 so a partial
6818sep helped

so do you have a idea for simple conversion of the PLCC pkg to DIP-40
an adapter perhaps ???

---
Probably, but they're usually hideously expensive.

Was the 75518 soldered in or socketed?
---

thanks for chimeing in,
robb

---
My pleasure.

soldered
robb