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In the Forum: Melquiades Amplifier
In the Thread: Single-stage Melquiades vs. DHT amps
Post Subject: Ok, I am moving forward.Posted by Romy the Cat on: 4/14/2009
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Well, I do not know what DHT filament scenario I will choose. I consulted with different sources
http://www.intactaudio.com/forum/viewtopic.php?t=823
…but I still have no definitive opinion. There are few logical cons and pros for different implementation scenario and although I do have a bias to go for a dedicated DHT filament transformer but no one talks about the results in term of sound. So, I decide to try BOTH dedicated and decoupling transformers. Both of them have ordered, will see where it will lend me…
Meanwhile I took a temporary dedicated 6.3V 25A transformer that was laying around and put the DHT Milq together. It worked very fine. I did not listen the amp yet but rather just was observing how both 2A3 and YO186 work together in the SAME operation point. They do OK, here are the numbers:
The 2A3, the Sovtech one for now: 315V on anode, 51.5V dropped on cathode resistor, which lives for the tube 263V.5. The plate current 43mA with anode dissipation 11.3W
The YO186: 317V on anode, 49.9V dropped on cathode resistor, which lives for the tube 267V.5. The plate current 49.9mA with anode dissipation 13.3W
It looks OK, but I probably will drive YO186 a bit softer, let say at 11W. I can wait to start listen this thing…
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