GoodSoundClub - Romy the Cat's Audio Site

In the Forum: Melquiades Amplifier
In the Thread: To Milq builders: corrections, simplification, modifications.

Post Subject: VR tube biasePosted by Vincin on: 10/7/2014

Hi,

I buillt the amp based on your circuit with the exception of the bias scheme. Currently I have CRCRC bias for the ouput valve and Lithium battery grid bias for the driver. I use the amps to drive low efficiency 2 way ported boxes and vintage Tannoy coaxials to play girl & guitar music and occationally some chamber classical music. All standard parts and home-made OPTs, chokes and power trans wound by a friend of mine on the M6 silicon steel lams.

I'd like to report that the amp sound really good, even on my "shitty speakers for morons", given that the amp is not driven too hard. On moderate volume and simple music, the amp is transparent and no distortion that I can detect. I have a tweaked out 300b amp using most expensive ions and parts that do not compete very well with this 6C33C amp. Someday when I get less lazy, I will try to have some amorphous OPTs custom wound, and also the VR tube bias but at the moment I doubt on my speakers I would hear any meaningful improvements (any comments please?).

Also, I have been surprised how low costs the amp can be built.

Thanks Romy for sharing your passion. I have read your site for a couple of years, and found the site and your journey very entertaining even though like most moronic audio people I have no incentive to go so far (no ass kissing! intended).

Tks. Vi

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