MessageView 421F schematic

[Troglodite]

I have some sony portable speakers that take a 9V power supply, or 4 AA
batteries. Is it bad for them to use a 6V power supply (which works), and if
so, why? Cheers

4 AA batteries = 1.5X4 or 6V. So, 6V should work fine.

 

[Murph]

"News" <lou@loumsc.com> wrote in message news:<t6M5b.2303$y3.1605@ns45.bih.net.ba>...

Hello,
Am looking for either a schematic or service manual for a Tektronix T932A
Oscilloscope.
Any help appreciated.

Thanx,
Lou

Try here:

http://www.sarrio.com/sarrio/rsman3.html

 

[Pieter Hoeben]

On Sat, 6 Sep 2003 11:48:11 -0400, "Claude Sylvain"
<claudesylvain@sympatico.ca> wrote:

I got an old Motorola M68CDS8HC05 emulator, but I don't have any
documentation, and any Software for operating it.
I done some research on the Internet and I found nothing.
Is there some way to got this documentation and software.
Hi,

You do know the 6805 processor is obsolete? I sell replacement parts
for them. If you want to I can email my customers to see if one of
them has it. Chances are not very high though.

Regards,

Pieter Hoeben
you can contact me at: pieter@hoeben.com
http://www.hoeben.com

 

[Rich Andrews]

Jim Yanik <jyanik@abuse.gov> wrote in news:Xns93EA800031DBFjyanikkuanet@
204.117.192.21:

Rich Andrews <n0-spam@yah0o.com> wrote in
news:Xns93E9E2E952C6Emc2500183316chgoill@216.168.3.44:

Jim Yanik <jyanik@abuse.gov> wrote in
news:Xns93E8BE0112CC6jyanikkuanet@ 204.117.192.21:

Rich Andrews <n0-spam@yah0o.com> wrote in
news:Xns93E88502CF9D3mc2500183316chgoill@216.168.3.44:




Well, I changed the CRT and the problem is now gone. The mesh in
the old crt is distorted is my guess. Strange!

r



The mesh lens is a dome-shaped,very thin,fine screen,and if the scope
is shocked in certain axis,the lens could distort.Perhaps by setting
the
scope
down hard on it's end,in transporting it,but I am not certain of
that.


I am surprised how little there is to hold the crt in place. Changing
the CRT is about the easiest job in servicing that series.

r



It's important to not forget those corner cushions at the front of the
CRT.Some people seem to leave them out,but they protect the faceplate
from
cracking.

I put them back in and didn't lose any either. &gt

r


--
"Any sufficiently advanced technology is indistinguishable from
magic."

Arthur C. Clarke (1917 - ), "Technology and the Future"

 

[sparky]

On 8 Sep 2003 10:15:46 -0700, neo55592@hotmail.com (Neo) wrote:

After serveral years of service all 6 of our APC UPSs have failed due
to dead batteries. The models included: Back-UPS 450, Back-UPS Pro
600, Back-UPS Pro 650, two Back-UPS 900's and Back-UPS Pro 1000. Could
someone recommend a more reliable UPS brand based on reliability after
serveral years of operation?

After several years ANY brand of UPS will need new batteries. You
should initiate a scheduled maintainance service for all equipment if
you want it to operate reliably.



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[CWatters]

Find one using Sanyo cells in the battery. Sanyo make the best quality IMHO.
Not sure who uses them though!


"Neo" <neo55592@hotmail.com> wrote in message
news:4b45d3ad.0309080915.2fccdb96@posting.google.com...

After serveral years of service all 6 of our APC UPSs have failed due
to dead batteries. The models included: Back-UPS 450, Back-UPS Pro
600, Back-UPS Pro 650, two Back-UPS 900's and Back-UPS Pro 1000. Could
someone recommend a more reliable UPS brand based on reliability after
serveral years of operation?

 

[Al]

In article <4b45d3ad.0309080915.2fccdb96@posting.google.com>,
neo55592@hotmail.com (Neo) wrote:

After serveral years of service all 6 of our APC UPSs have failed due
to dead batteries. The models included: Back-UPS 450, Back-UPS Pro
600, Back-UPS Pro 650, two Back-UPS 900's and Back-UPS Pro 1000. Could
someone recommend a more reliable UPS brand based on reliability after
serveral years of operation?

What do you expect for a lifetime for those batteries anyway? What does
"several years" mean anyway?

As for myself, I pick up replacement batteries at an electronics flea
market for $4 each. No problemo! At a cost of about 20cents a day for
two batteries for a year, I have no problem with that. And the
replacements have lasted for "several years" already.

Al

--
There's never enough time to do it right the first time.......

 

[Rich Webb]

On 8 Sep 2003 10:15:46 -0700, neo55592@hotmail.com (Neo) wrote:

After serveral years of service all 6 of our APC UPSs have failed due
to dead batteries. The models included: Back-UPS 450, Back-UPS Pro
600, Back-UPS Pro 650, two Back-UPS 900's and Back-UPS Pro 1000. Could
someone recommend a more reliable UPS brand based on reliability after
serveral years of operation?

All batteries will fail after "several years."

Some UPSs (including some from APC) will periodically, or on command, do
a load test. Even then, all they can do is warn about a possible battery
failure, they can't prevent it.

Rather than buying new UPSs, just replace the batteries and recycle the
old ones.

--
Rich Webb Norfolk, VA

 

[Claude Sylvain]

Hello Pieter,

I know that HC05 MCU are not recommanded for new design, but I still work
with some old system that are using HC05, and I think this emulator could be
a good tool for them.

Best regards,
Claude.



"Pieter Hoeben" <hoebenNOSPAM@bigfoot.com> wrote in message
news:epvmlv0pgbieja60ndrhtm0hnfrmt6cvgp@4ax.com...

On Sat, 6 Sep 2003 11:48:11 -0400, "Claude Sylvain"
claudesylvain@sympatico.ca> wrote:
I got an old Motorola M68CDS8HC05 emulator, but I don't have any
documentation, and any Software for operating it.
I done some research on the Internet and I found nothing.
Is there some way to got this documentation and software.
Hi,

You do know the 6805 processor is obsolete? I sell replacement parts
for them. If you want to I can email my customers to see if one of
them has it. Chances are not very high though.

Regards,

Pieter Hoeben
you can contact me at: pieter@hoeben.com
http://www.hoeben.com

 

[Pieter Hoeben]

Hi,

I will check it. And if you ever need 6805 parts, you can get
them through me, email: pieter@hoeben.com

By the time an answer comes, this lead has probably
disappeared from this group, so I'll mail you personally.

Regards,

Pieter Hoeben

On Tue, 9 Sep 2003 06:19:04 -0400, "Claude Sylvain"
<claudesylvain@sympatico.ca> wrote:

Hello Pieter,

I know that HC05 MCU are not recommanded for new design, but I still work
with some old system that are using HC05, and I think this emulator could be
a good tool for them.

Best regards,
Claude.



"Pieter Hoeben" <hoebenNOSPAM@bigfoot.com> wrote in message
news:epvmlv0pgbieja60ndrhtm0hnfrmt6cvgp@4ax.com...
On Sat, 6 Sep 2003 11:48:11 -0400, "Claude Sylvain"
claudesylvain@sympatico.ca> wrote:
I got an old Motorola M68CDS8HC05 emulator, but I don't have any
documentation, and any Software for operating it.
I done some research on the Internet and I found nothing.
Is there some way to got this documentation and software.
Hi,

You do know the 6805 processor is obsolete? I sell replacement parts
for them. If you want to I can email my customers to see if one of
them has it. Chances are not very high though.

Regards,

Pieter Hoeben
you can contact me at: pieter@hoeben.com
http://www.hoeben.com

 

[Claude Sylvain]

Hello Pieter,

Thank you for your help,
Claude.




"Pieter Hoeben" <hoebenNOSPAM@bigfoot.com> wrote in message
news:6naslvsn6miosoh5m86h6urt4lk0bej74j@4ax.com...

Hi,

I will check it. And if you ever need 6805 parts, you can get
them through me, email: pieter@hoeben.com

By the time an answer comes, this lead has probably
disappeared from this group, so I'll mail you personally.

Regards,

Pieter Hoeben

On Tue, 9 Sep 2003 06:19:04 -0400, "Claude Sylvain"
claudesylvain@sympatico.ca> wrote:

 

[JW]

On Tue, 09 Sep 2003 00:52:55 GMT Rich Webb <bbew.ar@mapson.nozirev.ten>
wrote in Message id: <fi8qlvcs6if69uu8rok9bj2nh4cv71deh8@4ax.com>:

All batteries will fail after "several years."

How is it that a good car battery can work for 5 years or more, and under
harsh conditions to boot?

 

[Al]

In article <ca9ulvk0k2pqpp81a14u84qd7v2rvnbjc5@4ax.com>,
JW <none@dev.nul> wrote:

On Tue, 09 Sep 2003 00:52:55 GMT Rich Webb <bbew.ar@mapson.nozirev.ten
wrote in Message id: <fi8qlvcs6if69uu8rok9bj2nh4cv71deh8@4ax.com>:

All batteries will fail after "several years."

How is it that a good car battery can work for 5 years or more, and under
harsh conditions to boot?

One difference: Car battery is always being discharged/charged. Standby
battery is always being trickle charged.

Second difference: Standby battery is usually gel cell. Car battery is
liquid electrolyte.

Probably a lot more I haven't thought of.

Al

--
There's never enough time to do it right the first time.......

 

[Troglodite]

Regarding APC supplies, I've actually had NO failures of this brand at all,
except for battery replacement. We must have about 40 of them, most in the
300-400VA category, but about 5 of the 1KW versions for server and telephone
system backup. I don't buy the replacement batteries from APC though, their
prices are a little inflated. McMaster Carr carries the correct batteries for
about 25% less.

Though APC doesn't recommend replacing the batteries on their older Back-UPS
models without the battery compartment door, I do it anyway. Average battery
life for the small units is 2-2.5 years, and on the large units, 3-4 years.

Doug Moore

 

[JW]

On Wed, 10 Sep 2003 14:33:20 GMT Al <no.spam@here.com> wrote in Message
id: <no.spam-0428B5.10331910092003@news.verizon.net>:

In article <ca9ulvk0k2pqpp81a14u84qd7v2rvnbjc5@4ax.com>,
JW <none@dev.nul> wrote:

[...]

How is it that a good car battery can work for 5 years or more, and under
harsh conditions to boot?

One difference: Car battery is always being discharged/charged. Standby
battery is always being trickle charged.

So exercise is good for batteries too? ;-)

 

[Harvey White]

On Wed, 17 Sep 2003 04:00:04 GMT, "Maxwell" <riggdm@hotmail.com>
wrote:

Hi,
I am looking for a simple circuit to feed baseband video to two TV sets from
a vcr's baseband video output. Something like a video distribution
buffer/amplifier with two outputs.. Can anyone help with a circuit or
recommend a common chip which will do the job... Max

Radio shack makes them. Either does baseband, or baseband and S video

connectors.

Cheap at the price, and will drive 3 televisions.

If you are not in the us, try Tandy....

Harvey

 

[Tweetldee]

That's a large inductance for OTS variable inductors. What range of
inductance are you looking for?. J W Miller does custom jobs,
www.jwmiller.com.
--
Tweetldee
Tweetldee at att dot net (Just subsitute the appropriate characters in the
address)

Time is what keeps everything from happening all at once.
"John O" <johno@!noSPAM!heathkit.com> wrote in message
news:s%Z9b.5852$nQ.1983555@newssvr28.news.prodigy.com...

Pardon if this is a bit off-topic, but you guys are as likely as anybody
to
have an answer for me. If I should ask somewhere else, please redirect me.


Does anybody know of a company that could build a ~100 mH variable choke,
in
moderately small quantities, say 900 per year. Or, does anybody know where
I
can buy an off-the-shelf part in these quantities?

John O

 

[John O]

That's a large inductance for OTS variable inductors. What range of
inductance are you looking for?. J W Miller does custom jobs,
www.jwmiller.com.

Thanks for the lead, I'll check them out. We need about +/-5%.

These are used in classrooms, to teach students about phase shifts and tuned
circuits. We could adapt to a range of values, considering our generator is
limited to 20 kHz and lower.

-John O

 

[jolphil]

Jim Yanik <jyanik@abuse.gov> wrote in message news:<Xns93F964F3DD8F3jyanikkuanet@204.117.192.21>...

jolphil@hotmail.com (jolphil) wrote in
news:6327e639.0309170443.55c1f405@posting.google.com:

Hi,
Can anyone tell me if a FG502 function generator plug in work in a
7000 series scope(specifically a 7704a)? Also is there some where
online that shows what will work and what will not..
Thanks for reading this post
JP


FG502 is for use ONLY in a TM500 or TM5000 mainframe.

Only 7-series plug-ins can be used an a 7704A or other 7000 series scope.
Includes;
7A11,7A13,7A15,7A16,7A18,7A26 for vertical PI
7B50,7B80/85,7B92 for sweep PI.

Clif, I appologize for jumping in your post like that..Not sure how i
did it..I thought i was putting in a new post...
jolphil

 

[Lance Morgan]

Can a DMM/DVOM, w/frequency capability, measure how many times per
second 0.45V is being crossed?