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Originally Posted by retractablezing  Humm..i thought that the mathematics of gain would stumble upon the hability of the transformers to provide it. |
It not is problem..... highest gain up.......additional tube stage or/and interstage trafo and gain up can be above 60dB
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Unless you're talking about making the preamp work into overdrive pretty much all the time, making trafos, etc, everything work harder all the time, where would you get that extra gain?
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step up trafo and 4 stages can supply 80 dB. But not we.... any circuits,components,tube has technical limitations and reasonable sense.
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Several pres go into 80dBs without any such problems...
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Full TUBE preamps? Name it
Some manufacturers measure noise floor in different ways....and if you can see specifications of tube pre with "-100-120 dB noise floor" it has funny view,
how minimum.....weigh/unweight noise and other tricks....
We measure real noise floor...and any tube can not work without noises of electrons.
80dB gain up mean voltage amplification x10000. Preamp itself will quiet enough...till plugging any source of signal. You will hear your cable,steps and speech in isolated control room, car from street,radio,studio illumination, and other artefacts.
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i think if you have your shielding done right, it won't pick up anything else than what the microphone is hearing no?
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Ye, shielding and circuit topology is right. And device can not have visible noise. But what we can do with signal source?
It has a long cable and low output. But we have first tube already (in variant of 80db gain up for example), which we can use instead of Mic!
, we can sing via this tube!
, if gain up is 80db. Try connect any mic to this tube,and you will able spy for neighbor behind wall.
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Some very good mics have low output, it's just their nature (transformer choice) i guess  |
Step up trafo is more preferable way in this case
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Originally Posted by azzzy Well, in that case, like I said, the more you turn up the input the brighter and more present it gets. Albert told me that in the Affinity the input stage affects the sound more than the output stage. Hence turning up of the input knob instead of the output. I with I could max out both but then my Aadvark would clip like crazy. Maybe after I get my leveller I'll compress the output just for kicks and try to record with both stages maxed out. stike  stike |
Ye, but here small notice - all tubes/stages should be pumped for good sounding. Deal in reasonable balance between input level, output level for HDR and common gain up.
