Hi

have some problems to find data for MMIC MSA0304,
only need to know the bias resistor for Vcc=9V and/or 12V, IP3 and
gain

need it for a general purpose noise source with MPS918 to cover
500-25000kHz band for selectivity tests. The reason for using this old
device is that I already got some douzens

what sort of narrow band noise evel could I expect in a 1kHz BW from
MPS918 emitter-base-junction noise source?

73 es hpe hr fm u sn de
Jan-Martin, LA8AK
http://home.online.no/~la8ak/d.htm
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J M Noeding wrote:
Hi

have some problems to find data for MMIC MSA0304,
only need to know the bias resistor for Vcc=9V and/or 12V, IP3 and
gain

need it for a general purpose noise source with MPS918 to cover
500-25000kHz band for selectivity tests. The reason for using this old
device is that I already got some douzens

The MSA-0304 is identical to the Mini-Circuits MAR-3 part.

Have a look at http://www.minicircuits.com/dg03-170.pdf

MAR-3SM
12.5dB@100MHz gain
+23.0dBm IP3
Operating current and voltage: 35mA 5.00V

Dana K6JQ

J M Noeding wrote:
Hi

have some problems to find data for MMIC MSA0304,
only need to know the bias resistor for Vcc=9V and/or 12V, IP3 and
gain

need it for a general purpose noise source with MPS918 to cover
500-25000kHz band for selectivity tests. The reason for using this old
device is that I already got some douzens

The MSA-0304 is identical to the Mini-Circuits MAR-3 part.

Have a look at http://www.minicircuits.com/dg03-170.pdf

MAR-3SM
12.5dB@100MHz gain
+23.0dBm IP3
Operating current and voltage: 35mA 5.00V

Dana K6JQ

On Mon, 01 Dec 2003 19:14:37 -0800, Dana Myers wrote:


The MSA-0304 is identical to the Mini-Circuits MAR-3 part.

Have a look at http://www.minicircuits.com/dg03-170.pdf

MAR-3SM
12.5dB@100MHz gain
+23.0dBm IP3
Operating current and voltage: 35mA 5.00V

Dana K6JQ

tnx.
Tried check some noise generator descriptions, although I plan to use
e-b junction of MPS918 and found this good 25 years ago, but I
couldn't find any indication of the RF output level from different
types of sources.
Some noise bridge sources may have an amplifier because - to adjust to
null you need at least 40dB more signal than heard into the RX at zero

My purpose is checking selectivity to compare different boatanchor
receivers in different modes, and I need at least 1mV, so an MSA0304
or two doesn't seem to give sufficient gain...

73
Jan-Martin
http://home.online.no/~la8ak/e.htm
--
remove ,xnd to reply (Spam precaution!)

On Mon, 01 Dec 2003 19:14:37 -0800, Dana Myers wrote:


The MSA-0304 is identical to the Mini-Circuits MAR-3 part.

Have a look at http://www.minicircuits.com/dg03-170.pdf

MAR-3SM
12.5dB@100MHz gain
+23.0dBm IP3
Operating current and voltage: 35mA 5.00V

Dana K6JQ

tnx.
Tried check some noise generator descriptions, although I plan to use
e-b junction of MPS918 and found this good 25 years ago, but I
couldn't find any indication of the RF output level from different
types of sources.
Some noise bridge sources may have an amplifier because - to adjust to
null you need at least 40dB more signal than heard into the RX at zero

My purpose is checking selectivity to compare different boatanchor
receivers in different modes, and I need at least 1mV, so an MSA0304
or two doesn't seem to give sufficient gain...

73
Jan-Martin
http://home.online.no/~la8ak/e.htm
--
remove ,xnd to reply (Spam precaution!)

J M Noeding wrote:
On Mon, 01 Dec 2003 19:14:37 -0800, Dana Myers wrote:



The MSA-0304 is identical to the Mini-Circuits MAR-3 part.

Have a look at http://www.minicircuits.com/dg03-170.pdf

MAR-3SM
12.5dB@100MHz gain
+23.0dBm IP3
Operating current and voltage: 35mA 5.00V

My purpose is checking selectivity to compare different boatanchor
receivers in different modes, and I need at least 1mV, so an MSA0304
or two doesn't seem to give sufficient gain...

I suppose you could use one or two more MPS918s in an untuned
amplifier configuration before a MAR-3. You don't need gain
flatness, do you? The MAR-3 should give you a well-defined,
well-matched 50ohm output, since you have 'em you might try
using one.

Dana

J M Noeding wrote:
On Mon, 01 Dec 2003 19:14:37 -0800, Dana Myers wrote:



The MSA-0304 is identical to the Mini-Circuits MAR-3 part.

Have a look at http://www.minicircuits.com/dg03-170.pdf

MAR-3SM
12.5dB@100MHz gain
+23.0dBm IP3
Operating current and voltage: 35mA 5.00V

My purpose is checking selectivity to compare different boatanchor
receivers in different modes, and I need at least 1mV, so an MSA0304
or two doesn't seem to give sufficient gain...

I suppose you could use one or two more MPS918s in an untuned
amplifier configuration before a MAR-3. You don't need gain
flatness, do you? The MAR-3 should give you a well-defined,
well-matched 50ohm output, since you have 'em you might try
using one.

Dana

I have built a noise source using a series of amplifier modules, similar
to the MSA-0304.

It is essentually flat in frequency response up to several hundred MHz,
which I needed for my application. Granted, it took quite a few stages,
built in a couple of boxes to avoid any chance of instability due to the
high gain.

I did have to pay attention to the total integrated power, to keep the
output stage from distorting the noise, but for some sort of Rx bridge, it
would have more than enough drive.



Jim Pennell
N6BIU

I have built a noise source using a series of amplifier modules, similar
to the MSA-0304.

It is essentually flat in frequency response up to several hundred MHz,
which I needed for my application. Granted, it took quite a few stages,
built in a couple of boxes to avoid any chance of instability due to the
high gain.

I did have to pay attention to the total integrated power, to keep the
output stage from distorting the noise, but for some sort of Rx bridge, it
would have more than enough drive.



Jim Pennell
N6BIU

It took me 5 seconds to load up Google and type in "msa0304 data"
http://hamradio.lakki.iki.fi/new/Dat...RF/msa0304.pdf

/SM5GLC

On Tue, 02 Dec 2003 00:34:24 GMT, (J M Noeding)
wrote:

Hi

have some problems to find data for MMIC MSA0304,
only need to know the bias resistor for Vcc=9V and/or 12V, IP3 and
gain

need it for a general purpose noise source with MPS918 to cover
500-25000kHz band for selectivity tests. The reason for using this old
device is that I already got some douzens

what sort of narrow band noise evel could I expect in a 1kHz BW from
MPS918 emitter-base-junction noise source?

73 es hpe hr fm u sn de
Jan-Martin, LA8AK
http://home.online.no/~la8ak/d.htm