• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

Input Transformer for Amity

Tubenstein

Member
2011-08-13 11:08 am

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6A3sUMMER

Member
2016-06-07 6:50 am
The primary impedance is rated = 1k Ohms.
The frequency response is rated when driven from a 600 Ohm source.

Do you have a preamp that can drive 1k Ohms?
And is the preamp output impedance 600 Ohms or less?
If not, then you will not get the same performance as the specification sheet.
 
The primary impedance is rated = 1k Ohms.
The frequency response is rated when driven from a 600 Ohm source.

Do you have a preamp that can drive 1k Ohms?
And is the preamp output impedance 600 Ohms or less?
If not, then you will not get the same performance as the specification sheet.

A hybrid line stage with a big honking MOSFET voltage follower driving the downstream load easily gets the O/P impedance under 100 ohms. Scan the archives for my 6SN7 based setup. Obviously, other designs are feasible.
 

Tubenstein

Member
2011-08-13 11:08 am
The primary impedance is rated = 1k Ohms.
The frequency response is rated when driven from a 600 Ohm source.

Do you have a preamp that can drive 1k Ohms?
And is the preamp output impedance 600 Ohms or less?
If not, then you will not get the same performance as the specification sheet.


I have mu stage linestage that has 5687 loaded with MOSFET called Marsh sound design P2000t and it should have an output impedance less than 500ohm