Microwave Forum

kleiner-onkel · Administrator Messages: 412 Location: South-West-G

too less voltage ...!!!!

for that VCO (POS1060)

Chris

imgemini · Chef Clancy Wiggum Messages: 39

now what

should i do

imgemini · Chef Clancy Wiggum Messages: 39

hi
friend u drowing is good

can i have more rf spect plot . how to inceress in range of jammer
what is the rule of PA gain . is that use to tune the range

richy_64 · Administrator Messages: 198

Let me sumarize.
So you have a working jammer but no PA yet.

Have a look at Kleiner Onkels jammer 1 again. He uses a QCPM-9401 for PA (which works really good) and a adjustable resistor to limit the gain, or better, the current.
The problem is that GSM PAs are not designed for continuous transmission like we need for a jammer.
In fact, in a mobile the PA transmits 0,5µs and then it pauses for 3,5µs! So the most of the time it´s off.
The long off-time has a special advantage: The PA has time to cool down after a short, powerful transmission.
Disadvantage for us: We want to transmit continously, and therefore we have to limit the current to prevent the PA from overheating.
This can be done with a adjustable resistor in the supply line.

__________________________________________________

"Ich liebe es wenn ein (Schalt-)Plan funktioniert."

imgemini · Chef Clancy Wiggum Messages: 39

so can u tell me what will be the best PA for the jammer......

richy_64 · Administrator Messages: 198

>can u tell me what will be the best PA

No idea. What is the best car?

Collect some PAs from old mobile phones and then we will see which are suitable.

All non-SMD-PAs should be good.

__________________________________________________

"Ich liebe es wenn ein (Schalt-)Plan funktioniert."

imgemini · Chef Clancy Wiggum Messages: 39

any PA in ur mind

what about PF1040 .. what u use .

kleiner-onkel · Administrator Messages: 412 Location: South-West-G

first think about a trashy phones ... than a constitute amplifier ...

Chris

imgemini · Chef Clancy Wiggum Messages: 39

so r u saying to tune gain i can get contiui.. apmlifer