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In Reply to: This is something sensible I want to read. posted by cheap-Jack on February 28, 2007 at 08:49:43:
JackI do like the present incarnation of my Hafler DH 101. It has been running in my living room now for 23 years, 24 hours a day, 7 days a week barring unscheduled breaks by the local power company. It sounds fine to me.
I think it may be difficult to lift John Curl's article out of it's historical context. I believe that tantalum caps will have lower distortion than the industry standard for the low impedance transistor ciruits of that era, the aluminum electrolytic cap. Aluminum eletrolytic caps don't do very well above 500-1,000hz. Tantalum caps will do much better than that, but it is a hard sound. One of the advantages of tube electronics over transistor electronics is the effortlessness of sound reproduction above 1,000hz. Transistor circuits may test well above 1,000hz, but they always sound as if they are working very hard in the higher frequencies. That's what I meant by a 'zippy' sound to the stock DH 101. Replacement of the tantalum caps by similar valued film caps removed that 'zippy' sound.
You can try bipolar tantalum caps in your PC application, but I think you may find that even by parallelling 1uf/50V mylar caps from Digikey will produce a more neutral sound with a composite which will still fit in your enclosure.
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Follow Ups
- Re: This is something sensible I want to read. - corerosin 12:08:31 02/28/07 (1)
- I agree to your sensible reply. - cheap-Jack 12:25:13 02/28/07 (0)
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