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Hi all,

I got all the parts and I start to build the amps Yellow_Light_Colorz_PDT_08

I made 2 pcb, one for power supply the other for driver.
Custom made power trannies from italian producer.
1650N Hammond output trannies Yellow_Light_Colorz_PDT_12
Electro Harmonix EL34
Golden Dragon 6SN7
Valvo 12AX7
Sovtek GZ34

Here some pics:















Thanks to all for support.
I'll write here upgrades of building.

Bye

Nice work! Looking forward to seeing the finished units.

thanks a lot Ed! :)

Hi all,

Here the case after the painting... in a beautiful sunny day:



The wiring of the driver board



The inside in "test version", I have to improve the wiring and make rear/front panels.



The amp looks like this Yellow_Light_Colorz_PDT_12



I have checked the sound for only 5 min today... the amp works fine!
Now I set the bias at 40 mA...will be increased to 50-55mA to get "warm" sound Yellow_Light_Colorz_PDT_08

Bye,
Andrea

Hi Andrea,

Chassis looks nice! What's your B+ looking like? I think you can tweak that bias up no problem.

Andrea,

Nice work! I like the chassis and also the circuit boards. Congratulations!

Regards,

Thanks a lot for all guys!!!

Tonight I have increased bias at 45 mA...minute after minute the amp gets a wonderful face....I love it! Yellow_Light_Colorz_PDT_16

@Shannon
B+ is 480-485V, depend on the value of supply network...around 215-220V.

Andrea80 wrote:Now I set the bias at 40 mA...will be increased to 50-55mA to get "warm" sound Yellow_Light_Colorz_PDT_08

Go straight ahead to 55mA. They won't even break a sweat and it'll sound fantastic.

thank you so much Shannon for your help/support!
This amp is great!

Dears,

after nine 8 years (9 !!!) my Eiclones still work hard , now I want try the 6550 upgrade .
The maximum plate dissipation of this tube is rated 36 watts, so the limit current I can go is 36 / B+

What do you suggest?

Thank you guys.

Andrea