| Author |
Message |
binodbista@gmail.com
Guest
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 Posted:
Tue Nov 15, 2005 1:35 am Post subject:
Microphone (3.5mm plug) to an ADC (phono interface) |
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Basically I want to connect a microphone which has a 3.5mm end and
connect this into a phono input.
I was told I need to do something in between as it's a microphone input
and it is not as simple as just using a 3.5mmm to phono converter
Any experiences or advice would be appreciated.
Many Thanks.
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Gerard Bok
Guest
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| Posted:
Tue Nov 15, 2005 5:35 pm Post subject:
Re: Microphone (3.5mm plug) to an ADC (phono interface) |
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On 14 Nov 2005 15:16:02 -0800, "binodbista@gmail.com"
<binodbista@gmail.com> wrote:
| Quote: | Basically I want to connect a microphone which has a 3.5mm end and
connect this into a phono input.
I was told I need to do something in between as it's a microphone input
and it is not as simple as just using a 3.5mmm to phono converter
|
A phono input applies some frequency corrections, known as RIAA
correction. Basically, a phono input boosts low frequencies while
dimming high tones.
Apart from that correction, 'phono input' does not fully
describe the type of input. It can be meant for anything from
crystal to MD to moving coil.
Also important to know is the type of microphone involved. Most
low-cost microphones are elektret nowadays. Which means, that
they output a voltage that is OK for a crystal type input but is
far to high for any other phono input.
Elektret also requires either some powersupply (not available on
a phono input) or a high impedance input (available if the phono
input is suitable for crystal; but most aren't.)
If your microphone is of the 'dynamic' type, the voltage levels
won't cause any problem if the phono input is meant for MD. (Most
are.)
All by all: using a phono input to amplify a microphone is not
the easiest way to go :-)
--
Kind regards,
Gerard Bok |
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Don Stauffer
Guest
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| Posted:
Tue Nov 15, 2005 5:35 pm Post subject:
Re: Microphone (3.5mm plug) to an ADC (phono interface) |
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binodbista@gmail.com wrote:
| Quote: | Basically I want to connect a microphone which has a 3.5mm end and
connect this into a phono input.
I was told I need to do something in between as it's a microphone input
and it is not as simple as just using a 3.5mmm to phono converter
Any experiences or advice would be appreciated.
Many Thanks.
Radio Shack carries those. |
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binodbista@gmail.com
Guest
|
| Posted:
Tue Nov 15, 2005 5:35 pm Post subject:
Re: Microphone (3.5mm plug) to an ADC (phono interface) |
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Well I don't have much choice with using phonos as input as these are
fixed, however I do need to be able to connect microphones to phono
sockets. As you have quoted, the microphones I intend to use are just
low-cost electret based microphones. I haven't quite determined what
type of input the phono inserts are. I need to look into this. I do
have electret microphones that come with power, so given the right plug
converter, this could work.
If you have info on the different types of phono sockets, that would be
helpful.
Best Regards,
Binod
Gerard Bok wrote:
| Quote: | On 14 Nov 2005 15:16:02 -0800, "binodbista@gmail.com"
binodbista@gmail.com> wrote:
Basically I want to connect a microphone which has a 3.5mm end and
connect this into a phono input.
I was told I need to do something in between as it's a microphone input
and it is not as simple as just using a 3.5mmm to phono converter
A phono input applies some frequency corrections, known as RIAA
correction. Basically, a phono input boosts low frequencies while
dimming high tones.
Apart from that correction, 'phono input' does not fully
describe the type of input. It can be meant for anything from
crystal to MD to moving coil.
Also important to know is the type of microphone involved. Most
low-cost microphones are elektret nowadays. Which means, that
they output a voltage that is OK for a crystal type input but is
far to high for any other phono input.
Elektret also requires either some powersupply (not available on
a phono input) or a high impedance input (available if the phono
input is suitable for crystal; but most aren't.)
If your microphone is of the 'dynamic' type, the voltage levels
won't cause any problem if the phono input is meant for MD. (Most
are.)
All by all: using a phono input to amplify a microphone is not
the easiest way to go :-)
--
Kind regards,
Gerard Bok |
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Gerard Bok
Guest
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| Posted:
Wed Nov 16, 2005 1:10 am Post subject:
Re: Microphone (3.5mm plug) to an ADC (phono interface) |
|
|
On 15 Nov 2005 08:02:11 -0800, "binodbista@gmail.com"
<binodbista@gmail.com> wrote:
| Quote: | Well I don't have much choice with using phonos as input as these are
fixed, however I do need to be able to connect microphones to phono
sockets. As you have quoted, the microphones I intend to use are just
low-cost electret based microphones. I haven't quite determined what
type of input the phono inserts are. I need to look into this. I do
have electret microphones that come with power, so given the right plug
converter, this could work.
If you have info on the different types of phono sockets, that would be
helpful.
Gerard Bok wrote:
On 14 Nov 2005 15:16:02 -0800, "binodbista@gmail.com"
binodbista@gmail.com> wrote:
Basically I want to connect a microphone which has a 3.5mm end and
connect this into a phono input.
All by all: using a phono input to amplify a microphone is not
the easiest way to go :-)
|
That being the case, I suggest you take a look at
http://sound.westhost.com/project80.htm
which more or less solves your 'problem'.
By the way, the type of phono-input cannot be determined by the
type of socket.
Most common phono input is MD (Magneto dynamic, 47 kilo-ohms, a
few millivolts)
--
Kind regards,
Gerard Bok |
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