rf amp schematics 600 mw or less

[mark krawczuk]

hi, any one point me in the right direction for a diy rf amp for 315 mhz
and 433 mhz with output of 600 mw or less ?
thanks,
mark k

 

[Joe G (Home)]

"mark krawczuk" <krawczuk@adam.com.au> wrote in message
news:W6GdnU51CtYr47fXnZ2dnUVZ_tGdnZ2d@adnap.net.au...

hi, any one point me in the right direction for a diy rf amp for 315 mhz
and 433 mhz with output of 600 mw or less ?
thanks,
mark k

Hi Mark,

Consider the "Australia" legal limit for 433MHz as mandated in the ACMA
LIPD (low interference potential devices) standard is 25mW EIRP. Why do you
need 600mW? Is the transmitter
for Australia?

Information on the LIPD is available from here.

http://www.acma.gov.au/WEB/STANDARD/pc=PC_297

and written in to Australian Commonweath Law here
http://bit.ly/u2FOY

A part from being used oversea, the only other reason is you have a very
lossy antenna (575mW of loss).


==> Hint..... there are other frequencies in the LIPD standard that allow
up to 1watt.


Joe

 

[mark krawczuk]

hi, hmmmm max of 25 mw ?? there are " australian appproved " wifi cards in
laptops and pcmcia that are 50 mw to 100 mw , i clicked on the link
http://www.acma.gov.au/WEB/STANDARD/pc=PC_297 but cant find anything about
the max mw output .

mark k




"Joe G (Home)" <joe.g@optusnet.com.au> wrote in message
news:4a2e3681$0$29630$afc38c87@news.optusnet.com.au...

"mark krawczuk" <krawczuk@adam.com.au> wrote in message
news:W6GdnU51CtYr47fXnZ2dnUVZ_tGdnZ2d@adnap.net.au...
hi, any one point me in the right direction for a diy rf amp for 315
mhz and 433 mhz with output of 600 mw or less ?
thanks,
mark k

Hi Mark,

Consider the "Australia" legal limit for 433MHz as mandated in the ACMA
LIPD (low interference potential devices) standard is 25mW EIRP. Why do
you need 600mW? Is the transmitter
for Australia?

Information on the LIPD is available from here.

http://www.acma.gov.au/WEB/STANDARD/pc=PC_297

and written in to Australian Commonweath Law here
http://bit.ly/u2FOY

A part from being used oversea, the only other reason is you have a very
lossy antenna (575mW of loss).


==> Hint..... there are other frequencies in the LIPD standard that allow
up to 1watt.


Joe

 

[Joe G (Home)]

"mark krawczuk" <krawczuk@adam.com.au> wrote in message
news:1_CdnaDq0_FXIa3XnZ2dnUVZ_r-dnZ2d@adnap.net.au...

hi, hmmmm max of 25 mw ?? there are " australian appproved " wifi cards
in laptops and pcmcia that are 50 mw to 100 mw , i clicked on the link
http://www.acma.gov.au/WEB/STANDARD/pc=PC_297 but cant find anything
about the max mw output .

mark k

The best documents regarding Australian RF limits is available from here
http://bit.ly/u2FOY

WiFi is in the 2400MHz band and it covered by these documents



Item
19 All transmitters 2400-2483.5 10 mW (any type of modulation
scheme)

45A Digital modulation transmitters 2400-2483.5 4 W (1.The
radiated peak power spectral density in any 3 kHz is limited to 25 mW per 3
kHz. 2. The minimum 6 dB bandwidth must be at

least 500 kHz).

53 Frequency hopping transmitters 2400-2483.5 500 mW (A minimum
of 15 hopping frequencies must be used.)

54 Frequency hopping transmitters 2400-2483.5 4 W (A minimum
of 75 hopping frequencies must be used)



Regs Joe