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RE: Tre, do you implement and 'heroic' regulation with the filament as that seems to yield marked improvement~nT

76.90.100.230

Tre'

In Reply to: RE: Tre, do you implement and 'heroic' regulation with the filament as that seems to yield marked improvement~nT posted by RPMac on November 01, 2023 at 16:46:35

"What does the transformer inductance do to the load line of a tube?"
"It does not matter if your speaker does not go down to 31.25 Hz or not. If you are sending low frequency information to the amplifier, the amplifier will make the plate voltage move. If the plate voltage moves, the tube must spend bias current to charge and discharge the primary inductance as well as the actual primary load impedance. If the plate voltage or current "clips" because of low frequency plate excursions, the sound will suffer. "
Tre'

Have Fun and Enjoy the Music
"Still Working the Problem"
https://web.archive.org/web/20120618185607/http://www.sitesw (Open in New Window)

Edits: 11/02/23 11/02/23

Follow Ups:

RE: Tre, do you implement and 'heroic' regulation with the filament as that seems to yield marked improvement~nT - RPMac 05:52:28 11/05/23 (2)
A question to see if I understand this.
My tube amp has 100k input (100k from grid to ground). If I series a .01uF cap on the input, it will start roll off at 150Hz?
- RE: Tre, do you implement and 'heroic' regulation with the filament as that seems to yield marked improvement~nT - Tre' 06:09:04 11/05/23 (1)
  The -3db down point of the 6db per octave high pass filter created by the capacitor working into the 100k ohm resistor would be 159Hz.
  Here's the math.
  -3db point = 159155 / (cap value in uf X resistance value in ohms)
  Tre'
  Have Fun and Enjoy the Music
  "Still Working the Problem"
  - https://www.digikey.com/en/resources/conversion-calculators/ (Open in New Window)
  Edits: 11/05/23
  - RE: Tre, do you implement and 'heroic' regulation with the filament as that seems to yield marked improvement~nT - RPMac 09:44:13 11/05/23 (0)
    Thanks, that's what I needed to know

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