Tubes Asylum

RE: Which tube among suitable for linestage?

76.118.145.90

Palustris

In Reply to: RE: Which tube among suitable for linestage? posted by Tube747 on August 11, 2023 at 07:14:43

The E180F(T) and 5842 both have a Mu = 50. Very little amplification is generally necessary in a line stage. In fact the majority of users have way too much gain in their signal chain. There was a Chinese line stage on another forum that needed 10 tubes to attenuate the 2Vrms from the user's DAC to the 1.25Vrms needed to drive the amp to clipping!

Follow Ups:

RE: Which tube among suitable for linestage? - Tube747 11:05:03 08/11/23 (2)
If the 5842 load to, let's say 5k opt, the gain would be step down and end up the linestage around 15x of gain.
- RE: Which tube among suitable for linestage? - Palustris 10:19:36 08/12/23 (0)
  That does sound like an appropriate application for a tube like the E180F. I have a couple dozen of them bought years ago. I sorted them by plate voltage and current at a particular bias and found at least half of them were very close to the data sheet.
  
  I also used the D3a, but then got into high Gm triodes. The EC86 is generally cheap Mu = 68 @ 14mA/V Gm. It is well worth a try.
- 15X is too much gain (nt) - Triode_Kingdom 12:05:52 08/11/23 (0)
  nada aqui

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