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27th April 2006, 01:13 AM
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#1 |
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diyAudio Member
Join Date: Apr 2006
Location: Melb
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SE Output Transformer Matching
As most are aware that most designs single ended 300B is quite straight forward.
What I notice in a no of designs is the use different output transformers with different impedances. The 3 different impedances used are 2.5K, 3.5K and 5K. My question is, is there an optimun impedance, I believe sound quality is important(lower impedance give a fraction more power, higher impedance is better linearity) in this case? Any thoughts out there, eg matching types of tube( include KT88 and EL34 and 2A3) with their respective impedances. |
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27th April 2006, 02:13 AM
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#2 |
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diyAudio Member
Join Date: Dec 2004
Location: Cincinnati, Ohio
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The amplifiers operating point figures large in these questions. A higher B+ voltage lower bias current arrangement will likely favor a higher impedance etc.
__________________
Be sure your foil hat has a good low impedance ground. |
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27th April 2006, 04:28 PM
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#3 |
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diyAudio Member
Join Date: Apr 2006
Location: Melb
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I found this site all of you may be interested:
http://www.turneraudio.com.au/htmlwe...50pographs.htm it details the matching of transformer impedance with 6550 tube. |
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