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

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What schematic fits a ZETAGI B47 CB amplifier, and what transistor should replace the damaged one?

A schematic that seems to fit the ZETAGI B47 is the KL60 manual, and the damaged transistor may be an MS1307 that can be replaced with an IRF520 [#4005644] [#4005736] [#4005797] However, the amplifier may exist in different versions, because one user noted that their B47 uses a single bipolar transistor while the linked solution shows two MS1307 transistors [#4005810] So the best next step is to compare your unit against the KL60 schematic before replacing parts [#4005736] [#4005810]
Summary generated by AI based on the discussion content.
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  • #1 4004042
    zaczek
    Level 10  
    Posts: 86
    Rate: 5
    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.
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  • #2 4005302
    gimof
    Level 27  
    Posts: 1216
    Help: 50
    Rate: 60
    What is the fault? - let's start with this ...
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  • #3 4005602
    zaczek
    Level 10  
    Posts: 86
    Rate: 5
    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.
  • #4 4005644
    SP5IT
    VIP Meritorious for electroda.pl  
    Posts: 11602
    Help: 1298
    Rate: 1687
    MS1307
    Michael
  • #5 4005692
    zaczek
    Level 10  
    Posts: 86
    Rate: 5
    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.
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  • #7 4005778
    zaczek
    Level 10  
    Posts: 86
    Rate: 5
    Michal, now what's closer.Dzieki.This is something similar to the bipolar transistor. We look further :)
  • #8 4005797
    SP5IT
    VIP Meritorious for electroda.pl  
    Posts: 11602
    Help: 1298
    Rate: 1687
    Yes, as I wrote earlier MS1307
    You can replace IRF520
    Attachments:
    • Schemat Zetagi B47.pdf (21.23 KB) You must be logged in to download this attachment.
  • #9 4005810
    zaczek
    Level 10  
    Posts: 86
    Rate: 5
    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 :)
  • #11 4734717
    Lucki
    Level 21  
    Posts: 577
    Help: 22
    Rate: 43
    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?
  • #12 4734812
    Anonymous
    Anonymous  
  • #13 4734889
    Lucki
    Level 21  
    Posts: 577
    Help: 22
    Rate: 43
    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
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  • #14 4736174
    Anonymous
    Anonymous  
  • #15 4738474
    Lucki
    Level 21  
    Posts: 577
    Help: 22
    Rate: 43
    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 ?
  • #16 4759899
    Lucki
    Level 21  
    Posts: 577
    Help: 22
    Rate: 43
    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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Topic summary

✨ The discussion revolves around finding amplifier schematics for the ZETAGI B47, particularly addressing issues related to a malfunctioning power output due to a fallen transistor. Users share insights on potential replacements, including the MS1307 and IRF520 transistors, while also discussing the variations in ZETAGI amplifiers. Several links to schematics and manuals are provided, and users inquire about testing transistors and the impact of different components on amplifier performance. The conversation highlights troubleshooting steps and the importance of understanding the specific transistor types used in the ZETAGI B47.
Summary generated by AI based on the discussion content.
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