Microwave Forum

richy_64 · Administrator Messages: 198

Getting 5V for the MAX2622 is the smallest problem, isn´t it?
7805, 78L05

æthr · registered user Messages: 3

Chris,

on the Jammer II page, your calculation of the antenna length is incorrect.

Lambda = em travelling speed / frequency

so for the middle of the GSM band you'll get:

0.32 m = 300 / 920

1/4 Lambda -> 0.32 / 4 = 8.15 cm

8.15 * 0.95 (speed factor) = 7.75 cm long

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

thanks ... you're right ... !!

Most of the time im calculate at 1,89 Ghz ,,, so im going to correct during the next days.

Chris

viki · Guest

hi freinds
here is my noise generator i make as it is given by richy_64 but not working any help i will be greatful

viki · Guest

and here is the richy_64 circuit

richy_64 · Administrator Messages: 198

The three transitors are wrong. Swap collector and emitter.

viki · Guest

can i use this in place of noise_gen

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

of corse ... if you don't need such a hight output voltage ,,, it's possible to drive the circuit with 5V & lower output

what is our VCO ??

(Pos1060 need over 20V)

Chris

mujeeb · Guest

what value of this capi

viki · Guest

jusr claer these things plz

1) in ur n-gen circuit ...bc5506 is pnp or u want me to use bc547?

2) who much output noise is good for test cricuit . i have other n-gen having output noise is 1.25 is that eoungh?

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

@ mujeeb

100nF or 0.1uF