Wiederhold 1977 Quasi 2N3055

December 2020
StatusBuilt
Circuit familyWiederhold / quasi-complementary BJT
Photographs24 full-size gallery images
Downloads3 local design and reference files

Project Notes

A quasi-complementary Wiederhold build using 2N3055 outputs. The project moved from initially oscillating hardware to a working revision and includes detailed bench and analyzer records.

diyAudio discussion

Photo Gallery

20201223 153739
1. 20201223 153739 		20201223 153753 HDR
2. 20201223 153753 HDR 		20201223 153756
3. 20201223 153756 		20201223 153800
4. 20201223 153800
20201223 153808
5. 20201223 153808 		sinus 14kHz 34Vpp
6. sinus 14kHz 34Vpp 		sinus 150kHz
7. sinus 150kHz 		sinus 82kHz
8. sinus 82kHz
square 14kHz 24Vpp
9. square 14kHz 24Vpp 		square 14kHz
10. square 14kHz 		tip3055
11. tip3055 		whole amp1
12. whole amp1
whole amp2
13. whole amp2 		wiederhold77 quasi bjt
14. wiederhold77 quasi bjt 		20201223 153733
15. 20201223 153733 		20201223 153808
16. 20201223 153808
20201223 153800
17. 20201223 153800 		20201223 153756
18. 20201223 153756 		20201223 153753 HDR
19. 20201223 153753 HDR 		20201223 153739
20. 20201223 153739
20201223 153733
21. 20201223 153733 		both channels ready
22. both channels ready 		2N3055 tungsram inside zoom
23. 2N3055 tungsram inside zoom 		2N3055 tungsram inside
24. 2N3055 tungsram inside

Design Files and Documents

Documents and notes

FileSize
org_article\radio.b.1978-04.065.english.txt 2 KB
org_article\wieder.english.txt 4 KB

LTspice simulations

FileSize
wiederhold1977_quasi_bjt_as_built.asc 10 KB
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