Hi Some advice on stereo setup needed

J

Jeremy

Guest
Hi Heres what I need to do,

I needl to run 12 or 16 of these

Jaycar KSN1141A Piezo Tweeter - 400W

This CTS horn includes a protection circuit internally which allows the horn
to handle 400W RMS. It uses a miniature light bulb and a PTC resistor. Under
extreme high power surges, the PTC opens up allowing the speaker to continue
to play, at a somewhat compressed power level. The resulting product is
virtually blow- out proof speaker. CTS brand, formally
Motorola.Specifications:- Frequency response 1.8k to above 20kHz.-
Sensitivity average 92db 1m/2.83V 1 watt @ 8W- Ideal for Hi Fi and sound
reinforcement.- 3 Year Warranty. - Size: 187mm x 79mm - Rectangular.

with approx 75-100Wrms, I do not need any drivers this is a tweeter system
for driving birds froma cherry block, i am familar with ohms and bridging
ie. (i may have this wrong( 1 4 ohm speaker will deliver say 20W rms and if
I run 2 4 ohm speakers the resistance should be 2ohm? so the noise will be
40W)

What can anybody recommend,

p.s Iam not insane,


Yet :)
 
"Jeremy" <c-k-b@ihug.co.nz> wrote in message
news:cmv0hm$cn6$1@lust.ihug.co.nz...
Hi Heres what I need to do,

I needl to run 12 or 16 of these

Jaycar KSN1141A Piezo Tweeter - 400W

This CTS horn includes a protection circuit internally which allows the
horn
to handle 400W RMS. It uses a miniature light bulb and a PTC resistor.
Under
extreme high power surges, the PTC opens up allowing the speaker to
continue
to play, at a somewhat compressed power level. The resulting product is
virtually blow- out proof speaker. CTS brand, formally
Motorola.Specifications:- Frequency response 1.8k to above 20kHz.-
Sensitivity average 92db 1m/2.83V 1 watt @ 8W- Ideal for Hi Fi and sound
reinforcement.- 3 Year Warranty. - Size: 187mm x 79mm - Rectangular.

with approx 75-100Wrms, I do not need any drivers this is a tweeter system
for driving birds froma cherry block, i am familar with ohms and bridging
ie. (i may have this wrong( 1 4 ohm speaker will deliver say 20W rms and
if
I run 2 4 ohm speakers the resistance should be 2ohm? so the noise will be
40W)

What can anybody recommend,

p.s Iam not insane,


Yet :)




You will have to use a serial/parallel arrangement so that the end impedance
Click to expand...
matches the amplifier.
Lowering the impedance does not mean extra power usually in that situation.

--
Regards ........... Rheilly Phoull
 
"Jeremy"
Hi Heres what I need to do,

I needl to run 12 or 16 of these

Jaycar KSN1141A Piezo Tweeter - 400W

This CTS horn includes a protection circuit internally which allows the
horn
to handle 400W RMS. It uses a miniature light bulb and a PTC resistor.
Under
extreme high power surges, the PTC opens up allowing the speaker to
continue
to play, at a somewhat compressed power level. The resulting product is
virtually blow- out proof speaker. CTS brand, formally
Motorola.Specifications:- Frequency response 1.8k to above 20kHz.-
Sensitivity average 92db 1m/2.83V 1 watt @ 8W- Ideal for Hi Fi and sound
reinforcement.- 3 Year Warranty. - Size: 187mm x 79mm - Rectangular.

with approx 75-100Wrms, I do not need any drivers this is a tweeter system
for driving birds froma cherry block, i am familar with ohms and bridging
ie. (i may have this wrong( 1 4 ohm speaker will deliver say 20W rms and
if
I run 2 4 ohm speakers the resistance should be 2ohm? so the noise will be
40W)

What can anybody recommend,

p.s Iam not insane,

Yet :)
Click to expand...

** Insane ? No. Confused ? Yes.

A piezo tweeter is essentially a small capacitor - not an 8 ohm resistor
like conventional tweeters. The load impedance in the 1141A example you
quote is roughly equal to the series combination of a 0.3 uF capacitor and a
20 ohm resistor. So, it all depends on the frequency of operation you chose
what the actual load presented to the amp will be - but not less than
about 20 ohms in any case.

Be aware - piezos are VERY directional at high/supersonic frequencies -
the birds could just step out of the beams.




............. Phil
 
** Insane ? No. Confused ? Yes.

A piezo tweeter is essentially a small capacitor - not an 8 ohm resistor
like conventional tweeters. The load impedance in the 1141A example you
quote is roughly equal to the series combination of a 0.3 uF capacitor and
a
20 ohm resistor. So, it all depends on the frequency of operation you
chose
what the actual load presented to the amp will be - but not less than
about 20 ohms in any case.

Be aware - piezos are VERY directional at high/supersonic frequencies -
the birds could just step out of the beams.




............ Phil


Hi the sounds I will be running through are all in the audible range, and I
Click to expand...
have a unit with 4 of these speakers, that is very expensive, what I would
like to do is use it to supply the signal to an amp, which I
can then split run more speakers, I'am unsure of what frequencys are being
used, What can anybody recomend to amplify and drive a number of these
piezos,

Thanks Jeremy
 
"Rheilly Phoull" <Rheilly@bigpong.com> wrote in message
news:2vgo7hF2jcpe1U1@uni-berlin.de...
"Jeremy" <c-k-b@ihug.co.nz> wrote in message
news:cmv0hm$cn6$1@lust.ihug.co.nz...
Hi Heres what I need to do,

I needl to run 12 or 16 of these

Jaycar KSN1141A Piezo Tweeter - 400W

This CTS horn includes a protection circuit internally which allows the
horn
to handle 400W RMS. It uses a miniature light bulb and a PTC resistor.
Under
extreme high power surges, the PTC opens up allowing the speaker to
continue
to play, at a somewhat compressed power level. The resulting product is
virtually blow- out proof speaker. CTS brand, formally
Motorola.Specifications:- Frequency response 1.8k to above 20kHz.-
Sensitivity average 92db 1m/2.83V 1 watt @ 8W- Ideal for Hi Fi and sound
reinforcement.- 3 Year Warranty. - Size: 187mm x 79mm - Rectangular.

with approx 75-100Wrms, I do not need any drivers this is a tweeter
system
for driving birds froma cherry block, i am familar with ohms and
bridging
ie. (i may have this wrong( 1 4 ohm speaker will deliver say 20W rms
and
if
I run 2 4 ohm speakers the resistance should be 2ohm? so the noise will
be
40W)

What can anybody recommend,

p.s Iam not insane,


Yet :)




You will have to use a serial/parallel arrangement so that the end
impedance
matches the amplifier.
Lowering the impedance does not mean extra power usually in that
situation.

--
Regards ........... Rheilly Phoull


Thanks Rheilly
Click to expand...
 
"Jeremy" <c-k-b@ihug.co.nz> wrote in message
news:cmvbe3$loi$1@lust.ihug.co.nz...
** Insane ? No. Confused ? Yes.

A piezo tweeter is essentially a small capacitor - not an 8 ohm
resistor
like conventional tweeters. The load impedance in the 1141A example you
quote is roughly equal to the series combination of a 0.3 uF capacitor
and
a
20 ohm resistor. So, it all depends on the frequency of operation you
chose
what the actual load presented to the amp will be - but not less than
about 20 ohms in any case.

Be aware - piezos are VERY directional at high/supersonic
requencies -
the birds could just step out of the beams.




............ Phil


Hi the sounds I will be running through are all in the audible range, and
I
have a unit with 4 of these speakers, that is very expensive, what I would
like to do is use it to supply the signal to an amp, which I
can then split run more speakers, I'am unsure of what frequencys are
being
used, What can anybody recomend to amplify and drive a number of these
piezos,
Click to expand...


** So this thing makes a noise like some giant *DEMENTED* bird to scare
away others ????

If so, then a standard hi-fi amp ( DSE have an 80 wpc one for a nice
price ) will likely be OK to drive up to 6 such piezos per channel.




............ Phil
 
** So this thing makes a noise like some giant *DEMENTED* bird to
scare
away others ????

If so, then a standard hi-fi amp ( DSE have an 80 wpc one for a nice
price ) will likely be OK to drive up to 6 such piezos per channel.




........... Phil


It produces Recordings of birds in distress and harassment sounds, all in a
Click to expand...
audible range,
It is quite effictive on specific species of birds, It's proven technology
buy still on the fringe,

Jeremy
 
"Jeremy" <c-k-b@ihug.co.nz> wrote in message
news:cn0hj3$fet$1@lust.ihug.co.nz...
** So this thing makes a noise like some giant *DEMENTED* bird to
scare
away others ????

If so, then a standard hi-fi amp ( DSE have an 80 wpc one for a nice
price ) will likely be OK to drive up to 6 such piezos per channel.




........... Phil


It produces Recordings of birds in distress and harassment sounds, all in
a
audible range,
It is quite effictive on specific species of birds, It's proven technology
buy still on the fringe,

Jeremy
Click to expand...

I'd hate to be your neighbour.
-H
 
I have a nut farm next to me with 80 acres of trees and a heap of assorted
noise makers ranging from gas guns to electronic things and all sorts of
noisy fertiliser spreading blowers.

Thankfully, I'm over halfway across a hilly 160 acres away, and the noise
doesn't wake me when I have a late night bender. It would be a pain if your
neighbours were closer.

All the noise makers do nowadays is tell every crow within 50 miles that
it's time to go and get some nuts! The day after he starts them, the flying
rat numbers increase a hundredfold.

Mind you, I'm not complaining about his noise, and he won't be complaining
about the noise when I finish making my 1/4 mile long runway, and start
doing circuits past his place!

Hope this helps,
Peter
 
All the noise makers do nowadays is tell every crow within 50 miles that
it's time to go and get some nuts! The day after he starts them, the flying
rat numbers increase a hundredfold.
Click to expand...
<g>

Mind you, I'm not complaining about his noise, and he won't be complaining
about the noise when I finish making my 1/4 mile long runway, and start
doing circuits past his place!
Click to expand...
Only a 1/4 mile ??
What *are* you flying ?
 
I'm pulling apart and putting back together an old Hovey Delta Bird (single
seat 95.10 ultralight biplane) with a 503 which might still wind up as just
a taxi trainer and "what does the wind do on the runway?" learning aid.
Depends on what it goes like and how many dollars I want to throw at it!
But, what do you expect for $3250?

Currently doing bush pilot training in a Gemini Thruster T500 with a 582 and
a cranky old instructor that must love the sound of his own voice! The only
time he ever shuts up is when I get something right, and he knows if I'm
turning down the headsets! Still, I'm waking up to all the tricks, like
telling him I'm going to do a pre-takeoff check and not to be in such a
rush,........

Also have a few lessons planned with a second grumpy instructor, in flying
with the blue bit down! I have had my PPL for over a dozen years without
using it while going through the financial hurdles one gets into with a
farm! At least it gave me time to read and study the books! Thankfully I
have an electronics background to fall back on, it's stopped the bank
manager from writing any more dirty letters!

Runway 13/31 will be about 330 metres on my place and 70 metres on my
(other, not the one with the bird callers) next door neighbours place, both
ends have a wild drop-off, and a few trees to fit between! Not much point in
me making a drag racer if it doesn't have wings.

Runway 04 will be one way, 260 metres uphill and approach over power lines
and trees with no go-round, 'cause you will crash into the side of the
mountain whatever way you turn! Still, I never had a go-round in the Blanic
I first flew in!

Still thinking of what I'd like to get instead of my next couple of new
cars, and probably the next couple as well! I can happily drive round in a
$2000.00 shitbox, cause regardless of what sort of car it is, when you get
up to 60mph and pull back on the steering wheel, it's not anywhere near as
exciting! Thoughts run to an old Auster, a replica Sopwith Pup, a real WW2
Storch with it's 770 something cubic inch inverted aircooled V8 with open
exhausts, can you imagine how horny that would sound purring over? A
Spitfire,............ Who knows, maybe I can have the lot?
Peter

"MC" <MC@nonexistant.place> wrote in message
news:cnsij7$j4p$1@news-02.connect.com.au...
All the noise makers do nowadays is tell every crow within 50 miles that
it's time to go and get some nuts! The day after he starts them, the
flying
rat numbers increase a hundredfold.

g

Mind you, I'm not complaining about his noise, and he won't be
complaining
about the noise when I finish making my 1/4 mile long runway, and start
doing circuits past his place!

Only a 1/4 mile ??
What *are* you flying ?
Click to expand...
 
On Tue, 23 Nov 2004 01:26:56 +1000, "Bushy" <please@reply.to.group>
wrote:

I'm pulling apart and putting back together an old Hovey Delta Bird (single
seat 95.10 ultralight biplane) with a 503 which might still wind up as just
a taxi trainer and "what does the wind do on the runway?" learning aid.
Depends on what it goes like and how many dollars I want to throw at it!
But, what do you expect for $3250?

Currently doing bush pilot training in a Gemini Thruster T500 with a 582 and
a cranky old instructor that must love the sound of his own voice! The only
time he ever shuts up is when I get something right, and he knows if I'm
turning down the headsets! Still, I'm waking up to all the tricks, like
telling him I'm going to do a pre-takeoff check and not to be in such a
rush,........

Also have a few lessons planned with a second grumpy instructor, in flying
with the blue bit down! I have had my PPL for over a dozen years without
using it while going through the financial hurdles one gets into with a
farm! At least it gave me time to read and study the books! Thankfully I
have an electronics background to fall back on, it's stopped the bank
manager from writing any more dirty letters!

Runway 13/31 will be about 330 metres on my place and 70 metres on my
(other, not the one with the bird callers) next door neighbours place, both
ends have a wild drop-off, and a few trees to fit between! Not much point in
me making a drag racer if it doesn't have wings.

Runway 04 will be one way, 260 metres uphill and approach over power lines
and trees with no go-round, 'cause you will crash into the side of the
mountain whatever way you turn! Still, I never had a go-round in the Blanic
I first flew in!

Still thinking of what I'd like to get instead of my next couple of new
cars, and probably the next couple as well! I can happily drive round in a
$2000.00 shitbox, cause regardless of what sort of car it is, when you get
up to 60mph and pull back on the steering wheel, it's not anywhere near as
exciting! Thoughts run to an old Auster, a replica Sopwith Pup, a real WW2
Storch with it's 770 something cubic inch inverted aircooled V8 with open
exhausts, can you imagine how horny that would sound purring over? A
Spitfire,............ Who knows, maybe I can have the lot?
Peter
Click to expand...
Hello Peter,
I enjoyed reading your post. Do you have pictures of your
ultralight biplane and runway? Great to hear that some of
your dreams are coming true.
Regards,
John Crighton
Hornsby
 
Hello Peter,
I enjoyed reading your post. Do you have pictures of your
ultralight biplane and runway?
Click to expand...
Emailed direct to you John

Hope your dreams come true as well,
Peter
 
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