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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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In Reply to: I'm perplexed as to why one channel of my SET amp has 4.0 mv. of hum and the other has 1.2..... posted by Iczerman on July 2, 2012 at 20:55:23:
Are the Finals DHT tubes or indirectly heated.?? Need to know that. Are your filament heated with AC or DC ?If DHTs on AC : swap tubes between channels and remeasure hum to see how much of that is due to tube differences, which with DHTs can easily account for these measured differences. Report back to us please.
One other thing, a dead quiet DHT amp is also often a dead sounding amp !!
Jeff Medwin
Edits: 07/03/12
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Follow Ups
- RE: I'm perplexed as to why one channel of my SET amp has 4.0 mv. of hum and the other has 1.2..... - drlowmu 00:44:37 07/03/12 (4)
- RE: I'm perplexed as to why one channel of my SET amp has 4.0 mv. of hum and the other has 1.2..... - Iczerman 13:39:42 07/03/12 (3)
- RE: I'm perplexed as to why one channel of my SET amp has 4.0 mv. of hum and the other has 1.2..... - drlowmu 14:29:42 07/03/12 (2)
- RE: I'm perplexed as to why one channel of my SET amp has 4.0 mv. of hum and the other has 1.2..... - Iczerman 16:19:20 07/05/12 (1)
- RE: I'm perplexed as to why one channel of my SET amp has 4.0 mv. of hum and the other has 1.2..... - drlowmu 00:22:52 07/06/12 (0)
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