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    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

2 ECL 805 SE

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hello ,

Here is my ampli has 2 audio ways with 2 ECL 805, the plan of the assembly , l together made with elements of recoveries(recyclings), only, the transfomateur torique is new.

J have to copy on l ampli ECL 82 and ECL 86 for etre the best adapted, l ampli go out 5 W under 1000 hertzes is 8 ohms, he works well between 300 and 18 000 hertzes, down transformers are not well of has their conceptions
 

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hello ,

again news build , and " full triode " , the power out is good , full recycled the old component audio .

😉
 

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I guess it sounds much better in "full-triode" than in pentode mode without any kind of negative feedback.

Enjoy!
Martin

PS: Have you tried to include the OT secondary in the cathode circuit for local feedback? It might help your frequency response a little.
 
hello Martin ,

Rather long has to adjust, i have to check(control) effect on G1 of the penthode, has every modification l is good but we can again improve this assembly , i joins curves with 1.5 V in G1 and 2 V in G1 on the triode meadow ampli
 

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