Looking for a buzzer

[ehsjr]

I need a 16 Vac 7/8" diameter buzzer - electromagnetic,
NOT a piezo. Any idea where I can get one?

Thanks,
Ed

 

[Paul Luggar]

I used to work on door entry systems that used AC buzzers like this, may be
a place to start looking?

--



Paul Luggar

M0SCI

Website WWW.M0SCI.CO.UK

Amsat-UK Member 6484

www.m0sci.co.uk/forum Devon and Cornwalls Amateur Radio Message Board


"ehsjr" <ehsjr@bellatlantic.net> wrote in message
news:w7Ibi.10859$%H5.1792@trndny03...

I need a 16 Vac 7/8" diameter buzzer - electromagnetic,
NOT a piezo. Any idea where I can get one?

Thanks,
Ed

 

[Al]

In article <f4paeh$o4e$1$8300dec7@news.demon.co.uk>,
"Paul Luggar" <luggsey@hotmail.com> wrote:

"ehsjr" <ehsjr@bellatlantic.net> wrote in message
news:w7Ibi.10859$%H5.1792@trndny03...

I need a 16 Vac 7/8" diameter buzzer - electromagnetic,
NOT a piezo. Any idea where I can get one?

Thanks,
Ed

You could make one easily from a small relay. Put the coil in series
with the relay contacts and your voltage source. Affix a diaphram to the
armataure to increase the area so that the buzz is louder. It also makes
a lot of radio interference.

Al

 

[ehsjr]

Paul Luggar wrote:

I used to work on door entry systems that used AC buzzers like this, may be
a place to start looking?

Thanks Paul, I'll try that.

Ed

 

[ehsjr]

Al wrote:

In article <f4paeh$o4e$1$8300dec7@news.demon.co.uk>,
"Paul Luggar" <luggsey@hotmail.com> wrote:


"ehsjr" <ehsjr@bellatlantic.net> wrote in message
news:w7Ibi.10859$%H5.1792@trndny03...

I need a 16 Vac 7/8" diameter buzzer - electromagnetic,
NOT a piezo. Any idea where I can get one?

Thanks,
Ed


You could make one easily from a small relay. Put the coil in series
with the relay contacts and your voltage source. Affix a diaphram to the
armataure to increase the area so that the buzz is louder. It also makes
a lot of radio interference.

Al

Thanks Al, I hadn't thought about modifying a relay.
Might be a good idea.

Ed

 

[Paul Luggar]

If you use a DC relay on an AC signal it will rattle without modification!
(;-)

--



Paul Luggar

M0SCI

Website WWW.M0SCI.CO.UK

Amsat-UK Member 6484

www.m0sci.co.uk/forum Devon and Cornwalls Amateur Radio Message Board


"ehsjr" <ehsjr@bellatlantic.net> wrote in message
news:EY1ci.4514$4t5.2536@trndny07...

Al wrote:
In article <f4paeh$o4e$1$8300dec7@news.demon.co.uk>,
"Paul Luggar" <luggsey@hotmail.com> wrote:


"ehsjr" <ehsjr@bellatlantic.net> wrote in message
news:w7Ibi.10859$%H5.1792@trndny03...

I need a 16 Vac 7/8" diameter buzzer - electromagnetic,
NOT a piezo. Any idea where I can get one?

Thanks,
Ed


You could make one easily from a small relay. Put the coil in series with
the relay contacts and your voltage source. Affix a diaphram to the
armataure to increase the area so that the buzz is louder. It also makes
a lot of radio interference.

Al

Thanks Al, I hadn't thought about modifying a relay.
Might be a good idea.

Ed

 

[Al]

In article <f4r7rj$s1k$1$8300dec7@news.demon.co.uk>,
"Paul Luggar" <luggsey@hotmail.com> wrote:

If you use a DC relay on an AC signal it will rattle without modification!
(;-)

--



Paul Luggar

M0SCI

Website WWW.M0SCI.CO.UK

Amsat-UK Member 6484

www.m0sci.co.uk/forum Devon and Cornwalls Amateur Radio Message Board


"ehsjr" <ehsjr@bellatlantic.net> wrote in message
news:EY1ci.4514$4t5.2536@trndny07...
Al wrote:
In article <f4paeh$o4e$1$8300dec7@news.demon.co.uk>,
"Paul Luggar" <luggsey@hotmail.com> wrote:


"ehsjr" <ehsjr@bellatlantic.net> wrote in message
news:w7Ibi.10859$%H5.1792@trndny03...

I need a 16 Vac 7/8" diameter buzzer - electromagnetic,
NOT a piezo. Any idea where I can get one?

Thanks,
Ed


You could make one easily from a small relay. Put the coil in series with
the relay contacts and your voltage source. Affix a diaphram to the
armataure to increase the area so that the buzz is louder. It also makes
a lot of radio interference.

Al

Thanks Al, I hadn't thought about modifying a relay.
Might be a good idea.

Ed

I am using an old GE buzzer, dated 1976, that has three terminals on it.
A common, a connection for DC voltage, and a connection for AC voltage.
I traced the wiring and found that the DC route is through a set of
contacts that are in series with the coil. The AC route bypasses the
relay contacts as described by the top-poster above. BTW, the packaging
for this buzzer says it was printed in England. Odd, but maybe the
buzzer was made in England also.

Al

 

[ehsjr]

Paul Luggar wrote:

If you use a DC relay on an AC signal it will rattle without modification!
(;-)

Yes - but not loud enough. The mod would be to somehow affix
a diaphram as Al suggested. I wouldn't energize it through
its own contact - that's likely to destroy the contact sooner
or later, which would defeat the thing.

Ed

 

[ehsjr]

Paul Luggar wrote:

I used to work on door entry systems that used AC buzzers like this, may be
a place to start looking?

Update - I finally got the buzzer the day before yesterday.
I found a place that does door entry (thanks to your reply),
& ordered their buzzer almost two months ago. There was some
kind of snafu - they thought they had shipped the thing but
they didn't. Anyway, all's well that ends well. Thanks again.

Ed