REQ: Bag Phone Testmode Assistance/ Amp question

I was hoping someone could help me figure out how to get my bag phone
into test mode. I've read the motorola bible (v 3.0), but my phone
doesn't have a STO key on the handset. Is the only way available to
short out the db25 pins if you don't have a STO key?

If it makes a difference, my phone was made in 1998, is model
19033wnsbf, it has ee3, it also says sun1930wb and the headset is
scn2744a. I'd also appreciate it if anyone could piont me to a manual
for the phone, as motorola says that they don't have them anymore.

I was also hoping that someone could point me to any source for
converting a 3watt phone like my bag phone into a RF amplifier for my
digital cell phone. I'd think that it would be possible to isolate
the bag phones amplifier and feed my digital's rf into it for a cheap
amplifier at least for the 800mhz signals. I got some high end
schematics for amps, but this seems like a simpler way to go it anyone
has any info along these lines. If not, I'll probably just shell out
a couple of bills for a commercial amp becasue I don't think I can
build from scrap for less.

TIA

---

› See More: REQ: Bag Phone Testmode Assistance/ Amp question

"Liam Ness" <[email protected]> wrote in message
news:[email protected]...
> I was hoping someone could help me figure out how to get my bag phone
> into test mode. I've read the motorola bible (v 3.0), but my phone
> doesn't have a STO key on the handset. Is the only way available to
> short out the db25 pins if you don't have a STO key?

Shorting out the pins is the quick method.
If I am short on equipment at the time, I just take a very fine strand of
wire
from a multi conductor wire, clip into a short piece and bend it
into a very little U.
I stick the U piece into the adjacent holes on the phone I am shorting
across
and plug the plug into the phone.

Turn it on, and you are in test mode.

> I was also hoping that someone could point me to any source for
> converting a 3watt phone like my bag phone into a RF amplifier for my
> digital cell phone. I'd think that it would be possible to isolate
> the bag phones amplifier and feed my digital's rf into it for a cheap
> amplifier at least for the 800mhz signals. I got some high end
> schematics for amps, but this seems like a simpler way to go it anyone
> has any info along these lines. If not, I'll probably just shell out
> a couple of bills for a commercial amp becasue I don't think I can
> build from scrap for less.

Don't try it, The phone's RF stage isn't designed to be used
as an auxiliary amp.
The only thing you could do is take the monolithic amp out
and build a complete new RF section around it.

You have to keep in mind that the AM has to pas
received signals from the antenna to the phone at the
same time it amplifies the signal from the phone to the antenna.

That requires band pass networks to separate the two paths.
IF you don't separate them properly, you get feedback.
And your amp turns into a neat little cell jamer
that will interfere with everyone else.

"Liam Ness" <[email protected]> wrote in message
news:[email protected]...
> I was hoping someone could help me figure out how to get my bag phone
> into test mode. I've read the motorola bible (v 3.0), but my phone
> doesn't have a STO key on the handset. Is the only way available to
> short out the db25 pins if you don't have a STO key?

Shorting out the pins is the quick method.
If I am short on equipment at the time, I just take a very fine strand of
wire
from a multi conductor wire, clip into a short piece and bend it
into a very little U.
I stick the U piece into the adjacent holes on the phone I am shorting
across
and plug the plug into the phone.

Turn it on, and you are in test mode.

> I was also hoping that someone could point me to any source for
> converting a 3watt phone like my bag phone into a RF amplifier for my
> digital cell phone. I'd think that it would be possible to isolate
> the bag phones amplifier and feed my digital's rf into it for a cheap
> amplifier at least for the 800mhz signals. I got some high end
> schematics for amps, but this seems like a simpler way to go it anyone
> has any info along these lines. If not, I'll probably just shell out
> a couple of bills for a commercial amp becasue I don't think I can
> build from scrap for less.

Don't try it, The phone's RF stage isn't designed to be used
as an auxiliary amp.
The only thing you could do is take the monolithic amp out
and build a complete new RF section around it.

You have to keep in mind that the AM has to pas
received signals from the antenna to the phone at the
same time it amplifies the signal from the phone to the antenna.

That requires band pass networks to separate the two paths.
IF you don't separate them properly, you get feedback.
And your amp turns into a neat little cell jamer
that will interfere with everyone else.