Simple Amplifier Test
date
Jan 26, 2024
authorEmailHash
3b03f25a36ab7450e9b0b0ec011d2d8b55429b95ec7a87cb97e734aa2af1877e
type
Post
author
Hugh “plushugh” He @ Radio Club
slug
simple-amplifier
status
Published
tags
circuit
summary
An experiment for a simple transistor amplifier, taken from「定本トランシステム回路の設計」and tested with a signal generator and oscilloscope.
![notion image](https://www.notion.so/image/https%3A%2F%2Fprod-files-secure.s3.us-west-2.amazonaws.com%2Fa6d45fbc-5027-46a2-b663-2ac14a151f24%2F2b09f161-56af-4de9-8b37-14993f9a933f%2FIMG_0381.jpeg?table=block&id=6a6fdc52-d607-449b-8c33-49bb39fcd35b&cache=v2)
I designed this simple low power amplifier circuit after reading the first few chapters of 「定本トランシステム回路の設計」(Transistor Circuit Design) by Masaomi Suzuki (translated ver.). The original schematic can be found on the last page of chapter 3.
Given the following constraints:
- 12V input power
- 5mA through emitter
![notion image](https://www.notion.so/image/https%3A%2F%2Fprod-files-secure.s3.us-west-2.amazonaws.com%2Fa6d45fbc-5027-46a2-b663-2ac14a151f24%2Fe7f1ee13-2f00-487e-831e-43b69d458f0d%2FIMG_0374.jpeg?table=block&id=5ccdba65-5a0b-4cf5-ba0f-858185f338fd&cache=v2)
I soldered it on a template board for amplifiers designed by BH1RBG.
Testing
![notion image](https://www.notion.so/image/https%3A%2F%2Fprod-files-secure.s3.us-west-2.amazonaws.com%2Fa6d45fbc-5027-46a2-b663-2ac14a151f24%2Ffaa84139-5b01-4caf-b4f1-be4ce103a372%2FIMG_0383.jpeg?table=block&id=6cdeffdb-4821-4040-b952-7ccda380a0c3&cache=v2)
I have tested this circuit with an HP 3310A Function Generator and an Tektronix 2467B Oscilloscope.
![notion image](https://www.notion.so/image/https%3A%2F%2Fprod-files-secure.s3.us-west-2.amazonaws.com%2Fa6d45fbc-5027-46a2-b663-2ac14a151f24%2F36bae2b6-6ba2-46a4-bd2f-e0d69e37be86%2FIMG_0384.jpeg?table=block&id=ca4e393e-9b63-43b3-aa7b-a620a4b2a32f&cache=v2)
![notion image](https://www.notion.so/image/https%3A%2F%2Fprod-files-secure.s3.us-west-2.amazonaws.com%2Fa6d45fbc-5027-46a2-b663-2ac14a151f24%2Fe710db7e-2dd6-4a33-9196-2ee0fd3e8f90%2FIMG_0385.jpeg?table=block&id=6bd51b44-f949-4e71-ba05-5dcc0c6b8846&cache=v2)
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![notion image](https://www.notion.so/image/https%3A%2F%2Fprod-files-secure.s3.us-west-2.amazonaws.com%2Fa6d45fbc-5027-46a2-b663-2ac14a151f24%2F8d8d04f2-bb2e-41be-b91e-d02ab76aa650%2FIMG_0375.jpeg?table=block&id=10308dca-b296-4c5e-8490-1fea9a3d40dd&cache=v2)
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![notion image](https://www.notion.so/image/https%3A%2F%2Fprod-files-secure.s3.us-west-2.amazonaws.com%2Fa6d45fbc-5027-46a2-b663-2ac14a151f24%2F9075acb8-f690-4bc5-b73d-43e9c2e9d373%2FIMG_0377.jpeg?table=block&id=8c8b1d53-77f3-4371-8822-63bd464b2882&cache=v2)
![notion image](https://www.notion.so/image/https%3A%2F%2Fprod-files-secure.s3.us-west-2.amazonaws.com%2Fa6d45fbc-5027-46a2-b663-2ac14a151f24%2F52f13cf9-343b-437e-b52e-15d1faf3f0bf%2FIMG_0372.jpeg?table=block&id=80325b64-bea8-4938-889a-0146cb9ce316&cache=v2)
![notion image](https://www.notion.so/image/https%3A%2F%2Fprod-files-secure.s3.us-west-2.amazonaws.com%2Fa6d45fbc-5027-46a2-b663-2ac14a151f24%2F05644218-5e36-4ccf-afe7-9be1285a26d2%2FIMG_0373.jpeg?table=block&id=6443670c-70b4-4d5d-b83b-086e9196e5bc&cache=v2)
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