set el84 tube amp

[sarrisk]

Hi all ! I made this ( weak ) but really interesting amp few years ago (based on decware SE84) .
Its only 1.8 watt and now with my BL Horn Speakers i discover what a SET low power design can do !

just want to share it because it's simple construction.




costas

[Bas Horneman]

Congratulations! How do you like it compared with your previous amplifiers?

[sarrisk]

Thanks !
This baby sounds really sweet (more sweet than my 807s, but lacks in dynamics) .
Its because of the el84 which is great tube ! . Obviously its 1,8 watt /channel its not a tremendous power but you can really enjoy solos , voices and ballads.

costas

[azazello]

Congratulations! Is EL84 in triod mode?

[Akita]

Nice wood chasis, I like that

[sarrisk]

Originally posted by azazello
Congratulations! Is EL84 in triod mode?

Originally posted by Akita
Nice wood chasis, I like that

Thanks !
El84 is in triod mode . Here is the schematic



costas

[Akita]

Interesting, What is the bias voltage of your 6n1p? Do it sound different by switch it to others bias point?

[sarrisk]

Originally posted by Akita
Interesting, What is the bias voltage of your 6n1p? Do it sound different by switch it to others bias point?

I never connected the 1,5k resistor in the bias circuit. If i remember well when checked once when first tested the amp sounds no difference. So 2 years before i modified the driving stage with this :



RK=430 ohm for Vp=250 volt

it matching better now.

regards
costas

[sarrisk]

personally i prefer 6922 instead of 6N1P . In my ears sounds more sweet .

costas

[Zmeika]

Hi ,
what kind of 6922 do you prefer?

regards Zmeika