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In the Forum: Melquiades Amplifier
In the Thread: 6 Channel Version of Super Melquiades
Post Subject: Super Milq 6 channels diaries: I am throughPosted by Romy the Cat on: 11/1/2007

Ok, now it is done and it is official as I see nothing available for conceptual improvement in the crossover circuit. Interestingly this version offers the most interesting sound as well, since the circus was tune for sound, not vise-versa, it is what was expected. The below is the last version and I am intend to leave it as is. There were no strategic changes since the last version but there was minor playing with loadings and gain to shape the sound in a way I feel it should be.

http://www.GoodSoundClub.com/TreeItem.aspx?PostID=5765

Here is the brief online:

1) Lover Bass Channel:  the crossover point was moved to 78Hz
2) Upperbass Channel: the plate of the ½ 6C33C was loaded against 4000R instead of 1100R. The drop in the voltage divider was changed accordingly.
3) Injection Channel: was added mechanical frame to the speaker for precise time-aliment and fixation of the found position. The references setting is from minus 14dB to minus 10dB
4) Fundamental Channel: the high pass slope was moved to slightly higher
5) MF Channel: nothing was changed, was good as is.
6) “Water Drop” Channel: The tube was converted into triode and the Bessel 12dB per octave at 13kHz was implemented. The reference setting is from minus 7dB.



Above is the HF's high-pass filter for the "Water Drop"

It is it. In the two channels stages the drivers are at 205V, the output tube of LF channel (full tube) at 230V/200mA, the Injection and Upperbass output tubes are at 200V/150mA (half tube). The single stages tube are at 205V/32mA. I will make a picture when I close the amp up. Now I need to convert the second amp… I do not whant even to start it... to much work...

The caT

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