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I made today an experiment trying to remove the wirewound LPAD attenuator from the MF’s channel secondary. I was VERY surprised how much better it was with no attenuator. I knew that it was not optimum but the degree it ruined sound was a big surprised to me.

The attenuator tine out rolled of HF quite aggressively, I did not use the MF without attenuator sine I got the last 25:1 Slagle’s coil and it was a mistake. With no attenuator the S2 runs much high – exactly what I would like. At that time I was using my 4V tubes that have ~3-4dB more gain then my 45s. With 45 I need to attenuate just 1dB…  So, I took 1.5R Mills non-inductive resistor and put it sire s with S2 driver. Not even a divider but juts a resistor. I feel that in context of HF driver and when a resistor is a fraction of VC impedance it is a legitimate way to do the things. There is not contra-current from compression drivers (no exertion) and dumping is not affected. Not to mention that my driver sits behind the 3.2KHz filter… So, with 1.5R resistor I hit the reference gains at 1000Hz but at 12kHz I need 1.5dB down in relation to this reference level!!! Playing the playback with MF at minus 1dB – the level that was fine with attenuator- make the playback bright like hell. Who could believe that the attenuator would eat so much?!!!

Also, adding 2-3R with series with S2 I will idle the 45 even more, loading it to 12KOhm-13KOhm… I need to order some very “fast” and very none-inductive power resistors… talking with those people…

http://www.texascomponents.com/pdf/tx221.pdf

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