Full Text Available
Note: Clicking the button above will open the full text document at the original institutional repository in a new window.
Study to replace the power supply of a valve guitar amplifier with a switch-mode power supply
Dissertation (MEng)--University of Pretoria, 2019.
Saved in:
| Other Authors: | |
|---|---|
| Format: | Thesis |
| Language: | English |
| Published: |
University of Pretoria
2019
|
| Subjects: | |
| Tags: |
No Tags, Be the first to tag this record!
|
| _version_ | 1867613465674252288 |
|---|---|
| access_status_str | Open Access |
| author2 | Du Plessis, Warren Paul |
| author_browse | Du Plessis, Warren Paul |
| author_facet | Du Plessis, Warren Paul |
| collection | Thesis |
| dc_rights_str_mv | © 2019 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. |
| description | Dissertation (MEng)--University of Pretoria, 2019. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/70997 |
| institution | University of Pretoria (South Africa) |
| language | English |
| last_indexed | 2026-06-10T12:36:34.949Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2019 |
| publishDateRange | 2019 |
| publishDateSort | 2019 |
| publisher | University of Pretoria |
| publisherStr | University of Pretoria |
| record_format | dspace |
| source_str | UPSpace — University of Pretoria Institutional Repository |
| spelling | oai:repository.up.ac.za:2263/70997 Study to replace the power supply of a valve guitar amplifier with a switch-mode power supply Du Plessis, Warren Paul u12028551@tuks.co.za Kotzé, Gert Bleeker UCTD Dissertation (MEng)--University of Pretoria, 2019. This study investigates the possibility of replacing the existing unregulated power supply using valve rectifiers in a valve guitar amplifier with a switch-mode power supply to reduce the weight and size of the amplifier. Unregulated power supplies using valve rectifiers have high output voltages which tend to sag when the amplifier is driven into saturation. Research was conducted to identify a switch-mode power supply topology capable of reproducing the required response. This switch-mode power supply had to produce high output voltages with a non-linear output response, whilst maintaining control over the output voltage and current. Emulating an unregulated power supply using valve rectifiers in a valve amplifier with a switch-mode power supply by introducing non-linearities was challenging because these non-linear power supplies tend to have rather poor output regulation. Furthermore, the switch-mode power supply still had to be stable and predictable under varying load conditions. Feedback control was used to ensure that the error between the actual output response and the desired response was kept within a reasonable range to obtain a stable and regulated output response. An important outcome was that the switch-mode power supply should not introduce any switching noise on the output of the amplifier within the human audible range. The switch-mode power supply was integrated into a valve amplifier. Side-by-side tests were conducted on the valve amplifier that was powered in turn by the unregulated and switch-mode power supplies. It can be concluded that it is indeed possible to replace the unregulated power supply using valve rectifiers in a valve amplifier with a non-linear switch-mode power supply, without affecting the dynamic response of the amplifier whilst being played. Electrical, Electronic and Computer Engineering MEng Unrestricted 2019-08-12T11:18:46Z 2019-08-12T11:18:46Z 2019/04/10 2019 Dissertation Kotzé, GB 2019, Study to replace the power supply of a valve guitar amplifier with a switch-mode power supply, MEng Dissertation, University of Pretoria, Pretoria, viewed yymmdd <http://hdl.handle.net/2263/70997> A2019 http://hdl.handle.net/2263/70997 en © 2019 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. application/pdf University of Pretoria |
| spellingShingle | UCTD Study to replace the power supply of a valve guitar amplifier with a switch-mode power supply |
| title | Study to replace the power supply of a valve guitar amplifier with a switch-mode power supply |
| title_full | Study to replace the power supply of a valve guitar amplifier with a switch-mode power supply |
| title_fullStr | Study to replace the power supply of a valve guitar amplifier with a switch-mode power supply |
| title_full_unstemmed | Study to replace the power supply of a valve guitar amplifier with a switch-mode power supply |
| title_short | Study to replace the power supply of a valve guitar amplifier with a switch-mode power supply |
| title_sort | study to replace the power supply of a valve guitar amplifier with a switch mode power supply |
| topic | UCTD |
| url | http://hdl.handle.net/2263/70997 |