They refused to work on it because it is so old. But the 200w of pure class A sounded very good. Spectral doesn’t make pure class A anymore.
Does anyone know where I can get transistors for a 30 yr old Spectral amp DMA200?
Stephen Sank diagnosed the problem with my friend's Spectral DMA-200. There are several DMOS FET that are bad or about to go bad. I need 4 DMOS FET model VN0116N5 or VN0120N5. and then also need to replace 4 DMOS FET PN0116N5 or PN0120N5 that are probably near failure. Total 8 pieces. Does anyone know where my friend can source these? Any help will be appreciated.
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Never heard of the output mosfet devices listed. www.exicon.info, Exicon makes lateral mosfets for your class a amplifier. Each n and p device respectively should be matched else current sharing per device will be compromised. This means n's are matched and p's are matched. Also, voltage biasing for these new Exicon devices tends to be lower so the voltage biasing circuit may need modification to accommodate the new devices otherwise biasing current will not be able to be adjusted low enough. |
- 16 posts total