Hi. i don't know if you have it already. I have one,. it is definetely 5V, however, I dont know if the (+) is inside or outside. If you know, please let me know since i need to plug it in too...
Jules Richardson (IIRC) was asking about this chip to repair a classic
computer peripheral (so it is on-topic)...
I can't find it in a databook, but I've found a circuit that uses it --
the 'Head Amplifier Playback' module (board P50) in a Philips VR2020 VCR
[1].It seems to contain 8 NPN transistors and nothing else (at least the
schematic of that board shows the internals of the IC as 8 transistors
only) and consists of 2 identical sections. Each is a long-tailed pair
with a couple more transistors acting as a current sink for the 'tail'.
Anyway, here's a pinout. There may be substrate connections, etc that I
don't know about, and which might matter if you want to design something
round the IC. But this should be enough to understand the circuit the
chip is used in. I assume the chip Jules is looking at is a 16 pin DIL
package.
I'll draw the schematic of half the chip, giving the pin numbers for one
section, with the corresponding pins for the other section in parentheses...
14 (11) 12 (13)
o o
| |
| |
/ \
|/ \|
3 (6) o-----| |-----o 4 (5)
|\> </|
\ /
| |
+-----+-----+
|
|
/
|/
2 (7) o-----|
|\>
\
|
+----------o 1 (8)
|
/
|/
15 (10) o-------|
|\>
\
|
|
o
16 (9)
-tony
Did you guys see this?
<http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2592518771&category=4504
5>. It's a thin manual for an EPROM programmer. This clown wants $9.80 for
shipping AND $2.80 for insurance (REQUIRED no less). Actual postage for
this via USPS bookrate is about 40 cents and insurance is 35 cents! How do
these clowns expect to stay in business!
Joe
Hi, Herb.
On Feb 14, 14:31, Herb Johnson wrote:
> Saw your msg below while searching the Web about Persci drives.
> I have a 277 manual, courtesty of Cromemco, in my inventory.
> I normally sell copies by the page but I would trade for copies
> of some of your manuals. Confirm you are still interested and
> we can work the details. I have the Persci 277, 299, (8-inch)
> manuals; what is the 207 and 272?
At the time, one of the places I looked was your site and I recall (I
think) seeing your manual. I've since been given a PDF copy, though,
so I don't need a "real" one.
As to the models, as you probably know, the 277 and 299 are twin drives
-- they take two disks -- the 277 being single-sided and the 299B being
double-sided. I only have the full spec for the 277/299, so I'm not
sure but I believe the 270/272 are single-mechanism versions (ie they
take one disk, not two).
--
Pete Peter Turnbull
Network Manager
University of York
Hi
Actually it won't make a particularly good Jacobs
ladder. If it doesn't blow a breaker, the rods
will most likely melt off. It is not like a neon
sign transformer that is current limited, it is
a transformer that is current rated. Let me see,
60Kv at 30ma is 1800W. How long so you think the
rods will hold up to such power.
I recommend having a fire extinguisher handy.
>From: "ed sharpe" <esharpe(a)uswest.net>
>
>it should make a fine Jacobs ladder!
>ed!
>----- Original Message -----
>From: "ben franchuk" <bfranchuk(a)jetnet.ab.ca>
>To: <General Discussion :>; "On-Topic and Off-Topic Posts"
><cctalk(a)classiccmp.org>
>Sent: Friday, February 20, 2004 9:37 PM
>Subject: Re: Aargh...It never ends..
>
>
>> Patrick Finnegan wrote:
>>
>> > Hmm. I've got the transformer off an X-Ray generator which puts out
>> > 60kV at probably at least 30mA sitting in my office where I've been
>> > playing with it a bit before bringing it home (and building a Bigger
>> > Better jacobs ladder). I think it'd probably sting a bit to get in the
>> > path of that...
>>
>> Build a demo fusor,that is lots of fun.
>> ( And $$$ and time and parts )
>> http://www.fusor.net/
>>
>> > It's quite funny, actually. When I tell people that I have it because
>> > "it makes sparks," no one seems to understand. But when I show them
>> > what it does, they're usually quite impressed and gain
>> > understanding. :)
>>
>> Wait till you roll out the dead body and show them how you can bring it
>> to life.:D
>>
>> > Pat
>> Ben.
>>
>>
>>
>>
>>
>
>
>
David V. Corbin <dvcorbin(a)optonline.net> wrote:
> Everybody, remember Hollerith's 39th Birthday is later this week!!!!!!!!
39th? Shouldn't it be older than that?
MS
...whose travels ever take them up near Boston?
Somebody down there has offered me a bunch of Visual 1050 items that I'm
interested in, but he is not willing to pack/ship the stuff and I can't get
down there anytime soon.
Alternatively, if someone is willing to try and handle the packing/shipping
for me let me know what terms you'd consider.
Thanks.
dc
_________________________________________________________________
Click, drag and drop. My MSN is the simple way to design your homepage.
http://click.atdmt.com/AVE/go/onm00200364ave/direct/01/
Just caught Sellam on Media Television here in Toronto. The show is produced by our independent station, CITY - TV.
Is this old news?
Anyway, my 14 year old son called me into the room and we both watched the fairly long (for TV) interview/tour. Besides being very interesting to me, I feel it gave my son some new-found pride in what I do as a hobby. Kind of gave it some legitamacy. If anyone wants more details, let me know.
Brian M.
(seen Sunday Feb. 22/04 at 12:15)
Hi
I thought someone in this group might also be
interested in these books.
For those interested in Forth, the Forth Encyclopedia
( upper left ) is worth more than all the rest of the
items he has. Of course, the Forth Primer is a historic
item as well.
Dwight
>From: "Jimmy Pepp" <onanysunday(a)yahoo.com>
>
>Hi:
>
>My name is Charlie Krajewski. For several years I
>subscribed to and saved Forth literature. I am
>cleaning up and I'd like to find a good home for these
>journals, etc.
>
>Most of what I have can be seen in this pic:
>
>http://www.skcpumps.com/images/forth.jpg
>
>The FORML proceedings are 1983, 1984, 1985
>5 Issues of "The Journal of Forth R&D"
>1984 Forth Rochester Conference
>
>Everything is $5/Journal, Except for:
>"Using Forth" $20
>"Inside F83", $10
>
>All will be sold, first come, first serve.
>
>Make an offer. If I don't receive the asking price I
>will sell for the best offer.
>
>You will be billed for the exact postage. Items will
>be shipped Media Mail to minimize shipping charges.
>
>I may unearth more stuff later.
>
>Charlie Krajewski
>112 Golfview Drive
>McMurray, PA 15317
>724-941-5779
>
>
>
>
>__________________________________
>Do you Yahoo!?
>Yahoo! Mail SpamGuard - Read only the mail you want.
>http://antispam.yahoo.com/tools
>
