17 Mar
2003
17 Mar
'03
1 p.m.
From: Witchy <witchy(a)binarydinosaurs.co.uk>
Hi
My Jupiter Ace has a small dynamic skeaker. I don't
recall how the graphics was done.
Dwight
-----Original Message-----
From: cctech-admin(a)classiccmp.org [mailto:cctech-admin@classiccmp.org]On
Behalf Of Philip Pemberton
Sent: 17 March 2003 07:37
To: cctalk(a)classiccmp.org
Subject: Jupiter Ace
I also need a 32-ohm speaker, circular, about 1 inch in size
edge-to-edge. Has anyone got a spare for sale? These same speakers were
*apparently* used in some of the Sinclair machines (Spectrum and ZX-series
IIRC).
Can't have been from what I remember; the original Speccy used a piezo
'speaker', and later ones fed the sound output through the RF line....none
of my Sinclair machines have that sort of setup, *but* the likes of the
Oric-1, Camputers Lynx etc all did. Even the Microbees that I'm currently
looking at have that sort of speaker....not sure if it's 32ohm though.
cheers
17 Mar
17 Mar
8:03 p.m.
Dwight K. Elvey wrote:
My Jupiter Ace has a small dynamic skeaker. I
don't
recall how the graphics was done.
Mine used a 1" diameter circular speaker
with a transparent Mylar (?) cone.
$DEITY knows what its impedance was, the wires going to the cone snapped off
while I was desoldering it... My schematic lists the speaker as a 220-ohm
speaker. Obviously I've read the label off the wrong part...
Does anyone know where I could get a 220-ohm speaker? Grant Searle
(http://www.home-micros.freeserve.co.uk/JupiterAce/JupiterAce.html) says he
got his from an old ZX Spectrum...
If it would help, I could put the speaker on my PC's scanner and upload a
100-or-so DPI picture of it to my website...
Thanks.
--
Phil.
philpem(a)dsl.pipex.com
http://www.philpem.dsl.pipex.com/
8:41 p.m.
Hello Phil,
I don't know if the impedance would be correct, or if the sound
quality would be adequate, but one source of unusual speakers
is to pull them off old modems. I've collected a few over the course
of time.
Best Regards
At 07:02 AM 3/18/03 +0000, you wrote:
Dwight K. Elvey wrote:
My Jupiter Ace has a small dynamic skeaker. I
don't
recall how the graphics was done.
Mine used a 1" diameter circular speaker
with a transparent Mylar (?) cone.
$DEITY knows what its impedance was, the wires going to the cone snapped off
while I was desoldering it... My schematic lists the speaker as a 220-ohm
speaker. Obviously I've read the label off the wrong part...
Does anyone know where I could get a 220-ohm speaker? Grant Searle
(http://www.home-micros.freeserve.co.uk/JupiterAce/JupiterAce.html) says he
got his from an old ZX Spectrum...
If it would help, I could put the speaker on my PC's scanner and upload a
100-or-so DPI picture of it to my website...
Thanks.
--
Phil.
philpem(a)dsl.pipex.com
http://www.philpem.dsl.pipex.com/
18 Mar
18 Mar
6:04 a.m.
Mail List wrote:
I don't know if the impedance would be correct, or
if the sound
quality would be adequate, but one source of unusual speakers
is to pull them off old modems. I've collected a few over the course
of time.
That's interesting - anyone got a spare modem (dead or alive as long
as the
speaker is intact) or am I going to have to wait for the Ripon and DRS
Hamfest in April?
I also need a component layout for the Ace - can someone with an Ace and a
digital camera please remove the large metal heatsink from their Ace and
send me a close-up picture of the mainboard, especially the area directly
underneath the main RAMs (near the two ROMs).
Thanks.
--
Phil.
philpem(a)dsl.pipex.com
http://www.philpem.dsl.pipex.com/
20 Mar
20 Mar
8:18 a.m.
-----Original Message-----
From: cctech-admin(a)classiccmp.org [mailto:cctech-admin@classiccmp.org]On
Behalf Of Philip Pemberton
Sent: 18 March 2003 17:04
To: cctalk(a)classiccmp.org
Subject: Re: Jupiter Ace
I also need a component layout for the Ace - can someone with an Ace and a
digital camera please remove the large metal heatsink from their Ace and
send me a close-up picture of the mainboard, especially the area directly
underneath the main RAMs (near the two ROMs).
That speaker looks very speccy-like to me; I'd forgotten it was that small!
Anyway, here y'go. ~540k images:
http://www.binarydinosaurs.co.uk/ace-front.jpg
http://www.binarydinosaurs.co.uk/ace-back.jpg
Make yer own machine from those :)
cheers
--
adrian/witchy
www.binarydinosaurs.co.uk - the online computer museum
www.snakebiteandblack.co.uk - monthly gothic shenanigans
9:30 a.m.
Witchy wrote:
That speaker looks very speccy-like to me; I'd
forgotten it was that
small!
Yeah, it's a 220 ohm squeeker. And I need to find a replacement... As if
I
don't have enough to do, what with the hole re-drilling and the track
re-building...
Anyway, here y'go. ~540k images:
http://www.binarydinosaurs.co.uk/ace-front.jpg
http://www.binarydinosaurs.co.uk/ace-back.jpg
Thankyouthankyouthankyouthankyou :-)
Now I know where some of the buggered tracks go, the others are obvious.
What interests me is the date on the left-hand side of the keyboard. Is that
an assembly date of some sort? Hmm... Mine's got one too, but the isopropyl
rinse has lightened the ink a bit.
Anyway, thanks a lot Witchy. I guess I'll have to keep my eyes open for a
knackered speccy. Or I could ask in comp.sys.sinclair, but I'm not that mad
yet...
Thanks.
--
Phil.
philpem(a)dsl.pipex.com
http://www.philpem.dsl.pipex.com/
12:12 p.m.
ben franchuk wrote:
A squeeker is
generally defined as a speaker that can produce high frequency
sounds really well, but is crap at reproducing low-frequency (bass) sounds.
An example would be the piezo speaker in a laptop.
Yeah, it's
a 220 ohm squeeker. And I need to find a replacement...
As if I don't have enough to do, what with the hole re-drilling and
the track re-building...
squeeker !? got mice problems. Can't you add a simple amp and drive a
regular speaker? Ben.
Maybe. But that would be a kludge at best and I'd like to
get my Ace to look
reasonably original. Then again, there's always the Ace's earphone jack...
And if I can get a speaker that's small enough, it's likely that the Ace's
driver circuit could run it.
Later.
--
Phil.
philpem(a)dsl.pipex.com
http://www.philpem.dsl.pipex.com/
12:51 p.m.
On Thu, 20 Mar 2003, Philip Pemberton wrote:
ben franchuk wrote:
A squeeker is
generally defined as a speaker that can produce high frequency
sounds really well, but is crap at reproducing low-frequency (bass) sounds.
An example would be the piezo speaker in a laptop.
How about a transistor radio sized matching (~5 --> 1) tranformer? You could
glue that to the back of an 8 ohm speaker.
Yeah,
it's a 220 ohm squeeker. And I need to find a replacement...
As if I don't have enough to do, what with the hole re-drilling and
the track re-building...
squeeker !? got mice problems. Can't you add a simple amp and drive a
regular speaker? Ben.
Maybe. But that would be a kludge at best and I'd like
to get my Ace to look
reasonably original. Then again, there's always the Ace's earphone jack...
And if I can get a speaker that's small enough, it's likely that the Ace's
driver circuit could run it.
Later.
--
Phil.
philpem(a)dsl.pipex.com
http://www.philpem.dsl.pipex.com/
Peter Wallace
1:24 p.m.
New subject: 220 ohm squeeker (was Re: Jupiter Ace)
Try an old pair of headphones, many use poly diaphragms for the acoustical
output and the headset element should be about the right size (have a kid
with a broken set of headphones that they used on their walkman style
stereo?)
----- Original Message -----
From: "Peter C. Wallace" <pcw(a)mesanet.com>
To: <cctalk(a)classiccmp.org>
Sent: Thursday, March 20, 2003 4:48 PM
Subject: Re: Jupiter Ace
On Thu, 20 Mar 2003, Philip Pemberton wrote:
> ben franchuk wrote:
> >> Yeah, it's a 220 ohm squeeker. And I need to find a replacement...
1:35 p.m.
ben franchuk wrote:
A squeeker is
generally defined as a speaker that can produce high frequency
sounds really well, but is crap at reproducing low-frequency (bass) sounds.
An example would be the piezo speaker in a laptop.
Actually, what about using a piezo speaker here (one of those metal
disk-type things you can get from Maplin). Possibly with a 220R resistor
in parallel if the driver circuit wants to see a finite DC load resistance?
I won't sound very good, but then Aces are not known for their musical
performance :-)
-tony
Yeah,
it's a 220 ohm squeeker. And I need to find a replacement...
As if I don't have enough to do, what with the hole re-drilling and
the track re-building...
squeeker !? got mice problems.
22 Mar
22 Mar
2:22 a.m.
-----Original Message-----
From: cctech-admin(a)classiccmp.org [mailto:cctech-admin@classiccmp.org]On
Behalf Of Philip Pemberton
Sent: 20 March 2003 20:30
To: cctalk(a)classiccmp.org
Subject: Re: Jupiter Ace
Thankyouthankyouthankyouthankyou :-)
No problem; the machine was sat behind me!
keyboard. Is that
an assembly date of some sort? Hmm... Mine's got one too, but the
isopropyl rinse has lightened the ink a bit.
The handwritten one? I'd say so. The Ace started in '82 and ended in 83 so
it's a good guess. Sadly neither Richard Altwasser or Steve Vickers want to
talk to me about the Ace, which is a shame. I've found people from the likes
of Tandata, Newbury Labs, Grundy, Memotech, Nine Tiles and Camputers who
like talking about the history; shame the people who were part of the
pivotal time of home computing are silent. One of the Newbury people also
did work for Torch *and* had a hand in the Enterprise 64.
Anyway, thanks a lot Witchy. I guess I'll have to
keep my eyes open for a
knackered speccy. Or I could ask in comp.sys.sinclair, but I'm
not that mad yet...
I've got a couple of cannibalised ones I can get the speaker from....just
got to find them! Watch this space.
cheers
--
adrian/witchy
www.binarydinosaurs.co.uk - the online computer museum
www.snakebiteandblack.co.uk - monthly gothic shenanigans
7789
days inactive
7794
days old
11 comments
8 participants
participants (8)
-
ard＠p850ug1.demon.co.uk -
bfranchuk＠jetnet.ab.ca -
dwightk.elvey＠amd.com -
fixxxer23＠attbi.com -
mail.list＠analog-and-digital-solutions.com -
pcw＠mesanet.com -
philpem＠dsl.pipex.com -
witchy＠binarydinosaurs.co.uk