Voyager #02 19 октября 1998

Железо     Модем

Skeleton - The scheme and the list of items to VICOMM-modem.

(C) PHANTOM Family
Music MY FU (K! NG (LAV! S! NE? (C) MR.Z / HWC



               VICOMM-MODEM



     We offer you the chart and a list of
elements for Vicomm-modem, kindly provided to us by PHANTOM 
Family corp. If you suddenly want to have the same text and 
diagrams on your PC, run the program from the application, 
press SPACE, and the question answer "Y", tentatively replacing 
disk in the drive to the net. Also recommend that you read a 
scrolling - there are many interesting and useful. 



 R1 - 27 ohms.
Resistor must be chosen, if the modem responds to
lifting the handset or dialing on a parallel
phone. It happens that the denomination needs to be increased 
to 68 ohms. 


 R2 - 82Om.
Sometimes you have to choose. With little resistance increases 
self-excitation and poorly detected busy tone, but the 
reception is better. At large - decreased sensitivity. Can be 
recommended to use for setting program MACRO MODEM. What's what 
- will be dismantled sami. 

 R3 - 10 k.
Pick up is not required.

 R4 - 1 k.
Pick up is not required.

 R5 - 6,8 kOhm.
Pick up is not required.

 R6 - 100 k.
Pick up is not required.

 R7 - 10 k.
Pick up is not required.

 R8 - 100 k.
Pick up is not required.

 R9 - 10 kOhm.
Pick up is not required.

 R10 - 4,7 kOhm.
Pick up is not required.

 R11 - 30 ohms.
Pick up is not required.

 R12 - 470 Ohm.
Pick up is not required.

 R13 - 150 ohms.
Pick up is not required.

 R14 - 10 kilohms.
Pick up is not required.

 R15 - 100 k.
Pick up is not required.

 R16 - 820 ohms.
Pick up is necessary so that the voltage in line with
public key transmission was about 15 volts.


 C1 - 0,22 uF x 160 volts.
In poor sensitivity of the coupler to the call to increase to 
0.47 microfarads. 


 C2 - 0,15 uF.
Pick up is not required.

 C3 - 0,15 uF.
Pick up is not required.

 Diode array - KTS407.
Is replaced by the 4-th diode with an operating voltage is not
less than 100 volts. (Just in case).

 Zener - KS456A.
It is better not to replace, because he has a lot of current 
stabilization. 

 VT1 - VT3 - whatever.
For example, KT315, KT3102.


 VT4 - KT814.
Can be replaced, but this type is the shirpotrebovsky,
are everywhere. Can be used (even better) KT940.
The inclusion of the reverse, ie, R14 should be put between
optocoupler emitter and the common. Collector coupler - to
plus. Under the scheme vary from VT4 emitter and collector. 
Base - to the point of connection R14 and the emitter coupler. 
In short, who fumbles - the kerf. 

 Reed relay.
Since voltage is not more than 5 volts. We
used a self-made: the usual reed wire, 0.08
mm. Winding vnaval. The diameter of the entire winding, together
with a reed, about 7mm. Resistance about 200 ohms.


 Diodes - KD522.


 Optocouplers - AOT128A-G or AOT127A-G.



             * Good luck! *