GoodSoundClub - Romy the Cat's Audio Site

In the Forum: Melquiades Amplifier
In the Thread: A different breed of 6C33C amplifier.

Post Subject: The fan did not last.Posted by Romy the Cat on: 10/5/2011

I never had any fuses in my amp and never had any need for it. I have a fuse at my DHT channel as the tube is rare but not on the 6C33C. I do not really understand the problem you have with current. You have the meter that shows you current in real time. Your tune the amp, put current for lest say 50mA and wait what will be the max currant. In 10-20 min it will be let say 200mA. Then you set your cruising current of lest say 300mA and forget about it. In a few weeks, as your tube will burn in you will add more current as the max rise of current will not reach 300mA. That is it. There is nothing else that need to be done with this tube. You need to bias the well hot tube, not the tube that just was turned on a few minutes ago.

BTW, my fun with the Golden tune did not last too long. I left in my amp one of the used Bulgarian tube and in 2-3 hours it begin to give to me pings in bass channel. This was the sigh that the tube is completely worn out, despite that it give current as it was a new tube. Before disposing the tube I broke it, took it apart and inspected the Gold Grid. The grid was absolutely black. He wire might be golden but it was covered with thick burned sediment residue. I am not sure that regular 6C33C would not have the same golden-like grid.

I never bough any used tubes and I can not believe that I have bought used 6C33C. To buy used 6C33C is like buying used toilet paper. Still, I did it…. I think the Bulgarian’s trick about the golden grid did blinded my brain.

The Cat

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