I'm using a Mitsubishi M67749M in my 432 MHz beacon. The only datasheet
I can find at RF Parts shows maximum parameters, etc. There are no
charts showing output power versus such things as Vcc1, Vcc2, Vbb and
input power. Does anyone have the charts for this module?

If you do and can make an educated guess from looking at the various
charts as to what my output power will be?

I have it set up as follows:
Vcc1 = +5V
Vbb = +5V
Vcc2 = +13.6V
RF Input = 20 mW (+13 dBm)

My real question is will I get much output power with only +5V on Vcc1
or should I just tie it to +13.6V just as Vcc2?

THANKS!!

Scott
N0EDV

I would leave Vcc1 and Vbb(bias,I'm assuming?) connected to +5V,to avoid
frying the module.

Scott wrote:
I'm using a Mitsubishi M67749M in my 432 MHz beacon. The only datasheet
I can find at RF Parts shows maximum parameters, etc. There are no
charts showing output power versus such things as Vcc1, Vcc2, Vbb and
input power. Does anyone have the charts for this module?

If you do and can make an educated guess from looking at the various
charts as to what my output power will be?

I have it set up as follows:
Vcc1 = +5V
Vbb = +5V
Vcc2 = +13.6V
RF Input = 20 mW (+13 dBm)

My real question is will I get much output power with only +5V on Vcc1
or should I just tie it to +13.6V just as Vcc2?

THANKS!!

Scott
N0EDV

PhattyMo wrote:

I would leave Vcc1 and Vbb(bias,I'm assuming?) connected to +5V,to avoid
frying the module.

Scott wrote:

I'm using a Mitsubishi M67749M in my 432 MHz beacon. The only
datasheet I can find at RF Parts shows maximum parameters, etc. There
are no charts showing output power versus such things as Vcc1, Vcc2,
Vbb and input power. Does anyone have the charts for this module?

If you do and can make an educated guess from looking at the various
charts as to what my output power will be?

I have it set up as follows:
Vcc1 = +5V
Vbb = +5V
Vcc2 = +13.6V
RF Input = 20 mW (+13 dBm)

My real question is will I get much output power with only +5V on Vcc1
or should I just tie it to +13.6V just as Vcc2?

THANKS!!

Scott
N0EDV



With Vcc1 at 5V, I get 6.8 Watts out during testing. It appears I will
actually need to lower Vcc1 just a bit to get down to my desired 4
Watts. Thanks for the note!

Scott
N0EDV

Scott wrote:
PhattyMo wrote:

I would leave Vcc1 and Vbb(bias,I'm assuming?) connected to +5V,to
avoid frying the module.

Scott wrote:

I'm using a Mitsubishi M67749M in my 432 MHz beacon. The only
datasheet I can find at RF Parts shows maximum parameters, etc.
There are no charts showing output power versus such things as Vcc1,
Vcc2, Vbb and input power. Does anyone have the charts for this module?

If you do and can make an educated guess from looking at the various
charts as to what my output power will be?

I have it set up as follows:
Vcc1 = +5V
Vbb = +5V
Vcc2 = +13.6V
RF Input = 20 mW (+13 dBm)

My real question is will I get much output power with only +5V on
Vcc1 or should I just tie it to +13.6V just as Vcc2?

THANKS!!

Scott
N0EDV



With Vcc1 at 5V, I get 6.8 Watts out during testing. It appears I will
actually need to lower Vcc1 just a bit to get down to my desired 4
Watts. Thanks for the note!
===============================================
From a list with RF power modules by Mitsubishi I get the following spec :
M67749M
Freq range : 430 - 450 MHz
Po : 7 watts
Gp : 25.4 dB
Pin : 20 mW
Vcc : 12.5 V
Vbb : 5 V (if a Vbb is indicated ,this is a linear module suitable
for SSB operation )

Vcc (max rating) : 15 V
Po (max rating : 10 Watts

Package outline : H27



Frank GM0CSZ / KN6WH