Find amplifier schematics for ZETAGI B47 and get expert advice from our technical forum

Question

I am looking for amplifier scheme for CB radio company ZETAGI B47.
I have a fallen transistor of matzo and I do not know how it was. I do not know if the fault is related only to this transistor or something else. I would be very helpful with the schematic.

gimof · Answer

What is the fault? - let's start with this ...

zaczek · Answer

malfunction - no power output. A power transistor in the TO220 casing (some 2SC) from which it is impossible to read the type.
It would be good to use a schematic as well, but I do not see any hope of winning it.

SP5IT · Answer

MS1307 Michael

zaczek · Answer

thank you for the info. I think that this is not the transistor, because it is definitely a Motorola transistor and the designation begins with liters C. It is, however, for all information. Perhaps it is useful.

SP5IT · Answer

See if this scheme fits: Michael

zaczek · Answer

Michal, now what's closer.Dzieki.This is something similar to the bipolar transistor. We look further

SP5IT · Answer

Yes, as I wrote earlier MS1307 You can replace IRF520

zaczek · Answer

Thank you for schemacik.How can I see the company ZETAGY probably produces different variations of this amplifier, because my is made on one bipolar transistor and also has the designations B47 The solution provided is on two transistors MS1307. So I go on

SP5IT · Answer

Michael Added after 23 [minutes]: And besides, 100W from one bipolar .... Michael

Lucki · Answer

My friends have the same amplifier. Today I asked my cousin to travel with me outside the city and within 7 km I could hear myself, when I turned off the amplifier it was identical, nothing has changed. Does this mean a transistor released? How do I insert IRF520 will be ok?

greetings

Added after 10 [minutes]:

How to check if the transistor is ok?

Anonymous · Answer

On what diameter, and what thickness is the wire in the coils ??

Lucki · Answer

Imagine my friend and I will give you. How to check if the transistor is ok or released? Added after 2 [hours] 10 [minutes]: the wire is 0.8 mm

Anonymous · Answer

But you have a bipolar, and I wonder if the IRF has the same coils. You check the transistor like any other

Lucki · Answer

Hello. I bought IRF530 because 520 was not there, I put in a fuse and the fuse trail hit. I put in 2 connections and also the trail hit him, I went back to 2sc196 and only gave badly. People say that I can hear better without an amplifier. What is wrong ?

Lucki · Answer

Welcome back. I can not deal with this amplifier. I put the original 2sc1969, 2166 and nothing. Transmission worse than without an amplifier. I tried nothing on the irf mosfether. What could be the reason ? What can be fought that this amplifier does not work so well?

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