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Need help finding a schematic for a Quasar TV/VCR combo
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Mark Zenier
electronics forum Guru Wannabe


Joined: 29 Apr 2005
Posts: 126

PostPosted: Thu Mar 24, 2005 6:14 pm    Post subject: Re: Would like info on Toshiba AM/FM chip Reply with quote

In article <Xns95F4A09D0542lk2k5f9sdosd@216.168.3.44>,
Dave <none@spam.com> wrote:
Quote:
mzenier@eskimo.com (Mark Zenier) wrote in
news:csm6hu$21d$1@eskinews.eskimo.com:

In article <Xns95E1D2814A0CBlk2k5f9sdosd@216.168.3.44>,
Dave <none@spam.com> wrote:
Hi,

This is a T916BI-H AM/FM receiver chip manufactured in '87.
....
You sure that's Toshiba? Most of their numbers are TAnnnn or TCnnnn
with a four digit number.

Telefunken also had a bunch of single chip receivers.
....


Quote:
I'm sorry I didn't follow up sooner.

The chip marking has a capital 'T' enclosed in a circle with four carats,
like a compass. Doing a google image search, it looks like it could be a
Telefunken brand...? I didn't find any exact matches though. If anyone
is interested I could post a picture on my image provider.

See if you can find a cache of datasheets and use one that's closest
to what you have. There's a pile of minor variations on the theme.
I couldn't find an exact match when fixing my GE radio.

Quote:
Could someone recommend a current AM/FM receiver chip in a DIP package?
Something that could be ordered 1-2 pcs from Mouser or similar place.
I'd still like to continue my little project.

Like Michael Black said, check out the NTE replacement parts line.
But the problem here is that a lot of single chip receivers use unique
inductors so scrapping out an existing radio may be the way to go.

Another possiblity is that there may be tuner modules available. Toko
used to have an FM tuner in a little metal box.

Mark Zenier mzenier@eskimo.com Washington State resident
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John Doe
electronics forum Guru Wannabe


Joined: 06 Jun 2005
Posts: 195

PostPosted: Thu Mar 24, 2005 6:14 pm    Post subject: Re: shorted (?) lead-acid battery Reply with quote

<William P.N. Smith> wrote in message
news:n0snv01gl5966adpn9v092dchlm6k56agk@4ax.com...
Quote:
"aurgathor" <spam-me@if-you.com> wrote:
One of my friend got a 100A or so charger, so I wonder if
I can blow the shorts with that. Wink Of course, I'd need to
find a good enough container first incase the whole battery
blows.

What's a new battery cost versus the risk of battery explosion?

Cost doesn't really come into this equation.... ;-)

And as I've said, I won't try this without a container that can
safely hold an exploding battery.
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Guest






PostPosted: Thu Mar 24, 2005 6:14 pm    Post subject: Re: shorted (?) lead-acid battery Reply with quote

"John Doe" <spam@sucks.com> wrote:
Quote:
And as I've said, I won't try this without a container that can
safely hold an exploding battery.

That you believe will, probably, as far as you know, maybe not cause
anyone any bodily injury, you hope. Have fun...
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LEDlights
electronics forum beginner


Joined: 24 Mar 2005
Posts: 1

PostPosted: Thu Mar 24, 2005 6:14 pm    Post subject: Re: Luxeon emitters Reply with quote

The slug is electrically connected to the substrate comprising 2
inverse series zener diodes, this explains why you cannot measure with
an ohm meter. See the Lumileds document RD25.pdf
http://www.lumileds.com/pdfs/RD25.PDF

Each zener may be in the range of 5v - 10v so it will not usually show
a problem in low voltage applications.

Pat
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FERNANDO11
electronics forum beginner


Joined: 24 Mar 2005
Posts: 2

PostPosted: Thu Mar 24, 2005 6:14 pm    Post subject: Re: Electronics Reply with quote

http://www.getgiftsforfree.com/index.php?ref_id=117896
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tlbs
electronics forum addict


Joined: 28 Apr 2005
Posts: 74

PostPosted: Thu Mar 24, 2005 6:14 pm    Post subject: Re: CMOS IC help! Reply with quote

This is a 4-bit Magnitude Comparator.

The 7485 (or 74LS85) is pin-for-pin compatible.

The only thing is the Vcc power supply will have to be limited to 5
Volts. If this chip is connected to external inputs, they will have to
be TTL compatible, also.

Digi-Key sells both parts 4063B & 75LS85 (but I didn't check their
stock-on-hand).
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Ross Herbert
electronics forum Guru


Joined: 03 May 2005
Posts: 429

PostPosted: Thu Mar 24, 2005 6:14 pm    Post subject: Re: shorted (?) lead-acid battery Reply with quote

On Fri, 28 Jan 2005 18:01:54 -0800, "aurgathor" <spam-me@if-you.com>
wrote:

Quote:

"Kim Clay" <kimclay@myrealbox.com> wrote in message
news:c4jjv0hc94hi6mamo3ui5pomt1qr85s298@4ax.com...
On Thu, 27 Jan 2005 11:41:56 -0800, "aurgathor" <spam-me@if-you.com
wrote:

Yesterday I started to charge a car battery that was sitting unused
for quite a while with a 1A charger. (my other one is broke)
Initially, the battery was around 6V,
Three discharged (but not completely) cells = 6V, the other three cells
are at 0.0V each due to internal shorts.

That is not correct. A discharged battery can go down that much,
or even more without the cells having internal shorts. Case in point,
a couple daysbefore this one I had a battery that measured 1.7V!
(in car, with a light left ON). In a couple of days, that battery was
measuring 14V, and worked just fine. I just checked it today --
12.85V.

The most likely scenario is that 3 of the cells were shorted and the
remaining 3 were not shorted BEFORE you commenced charging. The 3
un-shorted cells would however have been high resistance thus causing
the initial voltage reading to be high because the charging current
low. As the 3 un-shorted cells commenced to absorb charge their
internal resistance reduced thus the charging current increased. As
the charge on these cells reached 6.6V (approx) they would still have
taken nearly the maximum available current from your 1A charger and
this item would have been very hot.

Quote:

Based on the voltage measurements after a few hours of charging
(10.40V -> 8.40V -> 6.40V) some cells must've become shorted
during the charging process. Alas, I no longer remember the voltage
after the first 10 - 15 mins of charging -- that may have been close to 12V.

No... these cells were already shorted before charging commenced.

Quote:

Because (from your first sentence) "battery that was sitting unused
for quite a while". Car batteries self discharge just sitting on the
shelf. A discharged battery that sits is quickly self destructing
internally, as you have found out.

I expected sulfation, and while that's no good either, it's less
deadly, and it's easier to reverse than an internal short.

Not true. A fully sulfated battery is almost impossible to rectify
even partially.

Quote:

I guess material fell from the plates, created a highly conductive
sludge in the bottom, and that's what shorted the cells out.

One of my friend got a 100A or so charger, so I wonder if
I can blow the shorts with that. Wink Of course, I'd need to
find a good enough container first incase the whole battery
blows.

Stupid idea. You just can't BLOW away a build up of sludge at the
bottom of the cells by pumping in excessively high current. For a
start it would destroy any good cells in the process even if we
disregard the hazardous nature of such an action. Even assuming that
you could disturb the sludge and get it to distribute itself
throughout the electrolyte where it no longer shorted the cells, it
would still have to settle somewhere eventually. Guess where it would
settle?
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Michael A. Terrell
electronics forum Guru


Joined: 24 Mar 2005
Posts: 2291

PostPosted: Thu Mar 24, 2005 6:14 pm    Post subject: Re: Caps are Consistently Low Tol Reply with quote

"Watson A.Name - \"Watt Sun, the Dark Remover\"" wrote:
Quote:

Among the stuff that I scrounged a week or two ago I got bag of a
hundred capacitors. I think they're ceramic, and I'll describe the
case. It's black and 5 mm square by 2mm thick, and is labeled

CK05
BX
821K

on one side and

200V
A V X
7322

on the other side. I assumed that they were 820 pF, so I measured a
dozen of them with the AADE LC meter IIB. I got a consistently low
reading, somewhere in the 730 pF plus or minus 30 pF. These caps would
be old, maybe more than 30 years old judging by the date code. But I
would think that ceramics shouldn't change that much over the years.
Were they just not making caps right back then?

I checked for them using Google, and got this:
http://www.mouser.com/index.cfm?&handler=data.listcategory&D=80-CK05BX82
1K&terms=80-CK05BX821K&Ntt=*80CK05BX821K*&Dk=1&N=0&crc=true

Says it's 10%. So the minimum they should be is 738 pF. But most of
the dozen I checked were at or below this, so they are mostly out of
tolerance.

Eh?

Depending on the age, some of the older capacitance meters applied a
DC voltage during the test and it might change the reading a little.
You could put a bigger cap in series (X100 or more) with one lead and
apply a DC voltage through a 1 meg resistor to see if it changes
anything. The old Sprague TO-6 I had was adjustable up to 600 VDC.


--
Beware of those who post from srvinet.com!

Michael A. Terrell
Central Florida
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Guest






PostPosted: Thu Mar 24, 2005 6:14 pm    Post subject: Re: RAM chip specs: HY51C4256S-10 Reply with quote

et me know how many you need by email. I have them in stock.

My email is removethishs1948@yahoo.com
Remove the "removethis prior to emailing me



Please contact me at this email. I have them in stock


Prior to emailing me remove the "removethis"

removethishs1948@yahoo.com


On Fri, 31 Dec 2004 17:46:03 GMT, Michael <NoSpam@att.net> wrote:

Quote:
Looking for specs. on HY51C4256S-10 This is an old DIP RAM chip.
I tried the usual suspects including DataSheetArchive.com but no joy.

If I can't find this particular chip, is there a newer, compatible
chip? I have an old printer that would benefit from a few more megs of
RAM.

Tnx,
Michael
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Wouter van Ooijen (www.vo
electronics forum addict


Joined: 02 May 2005
Posts: 63

PostPosted: Thu Mar 24, 2005 6:14 pm    Post subject: Re: DC motor controller 24 V, 30..50 A Reply with quote

Quote:
I'm looking for DC motor controler,
24 Volts, 30 .. 50 A.

Would DIY (kistrus) 166 be any help? You might need some more cooling,
big wires soldered to the high-current traces, and of course you
should add interlligence, but you are surely up to that :)


Wouter van Ooijen

-- ------------------------------------
http://www.voti.nl
Webshop for PICs and other electronics
http://www.voti.nl/hvu
Teacher electronics and informatics
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Watson A.Name - \"Wa
electronics forum Guru


Joined: 02 May 2005
Posts: 795

PostPosted: Thu Mar 24, 2005 6:14 pm    Post subject: Re: Would like info on Toshiba AM/FM chip Reply with quote

"Dave" <none@spam.com> wrote in message
news:Xns95F4A09D0542lk2k5f9sdosd@216.168.3.44...
Quote:
mzenier@eskimo.com (Mark Zenier) wrote in
news:csm6hu$21d$1@eskinews.eskimo.com:

In article <Xns95E1D2814A0CBlk2k5f9sdosd@216.168.3.44>,
Dave <none@spam.com> wrote:
Hi,

This is a T916BI-H AM/FM receiver chip manufactured in '87. No
helpful results from Teoma, Google or Toshiba. I did get a hit from
a
Hong Kong vendor, but they said the pdf file was unavaliable. Would
anyone have a datasheet on this?

I have a few GE clock radios that I bought surplus which uses this
chip. I am using one of the radios now, and am impressed with the
reception and selectivity. The existing output is OK, but I'd like
to
design my own output amp for a 4 ohm speaker.

You sure that's Toshiba? Most of their numbers are TAnnnn or TCnnnn
with a four digit number.

Telefunken also had a bunch of single chip receivers. (Used in
various GE brand stuff, including an under the counter AM/FM radio I
have). (Most of their numbers were either TDA???? or U???, though).
They're part of Atmel now, (with a web site scrubbed clean of the
old
stuff last I checked).

Mark Zenier mzenier@eskimo.com Washington State resident



I'm sorry I didn't follow up sooner.

The chip marking has a capital 'T' enclosed in a circle with four
carats,
like a compass. Doing a google image search, it looks like it could
be a
Telefunken brand...? I didn't find any exact matches though. If
anyone
is interested I could post a picture on my image provider.

Could someone recommend a current AM/FM receiver chip in a DIP
package?
Something that could be ordered 1-2 pcs from Mouser or similar place.
I'd still like to continue my little project.

Thanks again,
David

Check for it at http://www.nteinc.com.
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Franc Zabkar
electronics forum Guru


Joined: 01 May 2005
Posts: 616

PostPosted: Thu Mar 24, 2005 6:14 pm    Post subject: Re: Need datasheet / pinout of old Intel PROM C3601 & C3602 Reply with quote

On Sat, 5 Feb 2005 10:54:19 +0100, "David Winter"
<d_winter@hotmail.com> put finger to keyboard and composed:

Quote:
Thanks for your help!
I now have the 3601 pinout, however, no way to get the 3602 one.
The Texas collection doesn't include a 512*4 PROM (only a 512*Cool.
I could trick with the two "Enable" pins of the 3601, supposing one was
suppressed in the 3602 to serve as A8 address line, but I'm not sure whether
all other pins remained unchanged.

Anybody can scan his TI Data Catalog for the 3602 (pinout, voltages) ?

From my 1990-91 NTE catalogue:

74S570 - 2Kbit, open collector outputs

1 A6 Vcc 16
2 A5 A7 15
3 A4 A8 14
4 A3 E1* 13
5 A0 Q1 12
6 A1 Q2 11
7 A2 Q3 10
8 Gnd Q4 9


- Franc Zabkar
--
Please remove one 's' from my address when replying by email.
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Mark Zenier
electronics forum Guru Wannabe


Joined: 29 Apr 2005
Posts: 126

PostPosted: Thu Mar 24, 2005 6:14 pm    Post subject: Re: Need datasheet / pinout of old Intel PROM C3601 & C3602 Reply with quote

In article <420496cd$0$2417$79c14f64@nan-newsreader-07.noos.net>,
David Winter <d_winter@hotmail.com> wrote:
Quote:
Thanks for your help!
I now have the 3601 pinout, however, no way to get the 3602 one.
The Texas collection doesn't include a 512*4 PROM (only a 512*Cool.
I could trick with the two "Enable" pins of the 3601, supposing one was
suppressed in the 3602 to serve as A8 address line, but I'm not sure whether
all other pins remained unchanged.

Anybody can scan his TI Data Catalog for the 3602 (pinout, voltages) ?



I've put the Monolithic Memories 63xx family datasheet on
<ftp://ftp.eskimo.com/u/m/mzenier/MMI63xx.pdf>
That should give you the 6305 pinout.

Mark Zenier mzenier@eskimo.com Washington State resident
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Dave
electronics forum beginner


Joined: 10 Mar 2005
Posts: 13

PostPosted: Thu Mar 24, 2005 6:14 pm    Post subject: Re: Would like info on Toshiba AM/FM chip Reply with quote

mzenier@eskimo.com (Mark Zenier) wrote in
news:csm6hu$21d$1@eskinews.eskimo.com:

Quote:
In article <Xns95E1D2814A0CBlk2k5f9sdosd@216.168.3.44>,
Dave <none@spam.com> wrote:
Hi,

This is a T916BI-H AM/FM receiver chip manufactured in '87. No
helpful results from Teoma, Google or Toshiba. I did get a hit from a
Hong Kong vendor, but they said the pdf file was unavaliable. Would
anyone have a datasheet on this?

I have a few GE clock radios that I bought surplus which uses this
chip. I am using one of the radios now, and am impressed with the
reception and selectivity. The existing output is OK, but I'd like to
design my own output amp for a 4 ohm speaker.

You sure that's Toshiba? Most of their numbers are TAnnnn or TCnnnn
with a four digit number.

Telefunken also had a bunch of single chip receivers. (Used in
various GE brand stuff, including an under the counter AM/FM radio I
have). (Most of their numbers were either TDA???? or U???, though).
They're part of Atmel now, (with a web site scrubbed clean of the old
stuff last I checked).

Mark Zenier mzenier@eskimo.com Washington State resident



I'm sorry I didn't follow up sooner.

The chip marking has a capital 'T' enclosed in a circle with four carats,
like a compass. Doing a google image search, it looks like it could be a
Telefunken brand...? I didn't find any exact matches though. If anyone
is interested I could post a picture on my image provider.

Could someone recommend a current AM/FM receiver chip in a DIP package?
Something that could be ordered 1-2 pcs from Mouser or similar place.
I'd still like to continue my little project.

Thanks again,
David
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Jim MacArthur
electronics forum beginner


Joined: 06 Feb 2005
Posts: 3

PostPosted: Thu Mar 24, 2005 6:14 pm    Post subject: Re: DC motor controller 24 V, 30..50 A Reply with quote

Hi Stef,

Stef Mientki wrote:

Quote:
I'm looking for DC motor controler,
24 Volts, 30 .. 50 A.

A PC should control the absolute position
of the angle of the motor.
I'm not sure, but I think in general this is called a servo system.

This is indeed a servo system, by my understanding at least. You will
probably want to attach a linear pot to the motor's shaft to get
feedback on its position, although if you want continuous rotation or
very accurate position feedback a shaft encoder might be better.

Is this a normal DC brush (commutator) motor? Is so, a RoboteQ motor
controller (www.roboteq.com) will do what you want but it might be a bit
overspecified and expensive for what you want, these will run two motors
at up to 120amps each. There are many cheaper DC motor controllers
around, have a look at the ones used in Battlebots / Robot Wars, but so
far as I know only the RoboteQ has the position feedback ability built in.

Jim
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