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In the Forum: Melquiades Amplifier
In the Thread: 6 Channel Version of Super Melquiades
Post Subject: Will see how it will work out…Posted by Romy the Cat on: 1/4/2008

 Paul S wrote:
Which caps exactly did you decide to try?  I don't recognize the big black jobbies.  Are they oilers?  Are they 200V?

I did not “decide” but went with what I had in my hands. They are the Ansars from the picture few post above, Metallized Polypropylene, 100uF/450V. I use two in parallel.

 Paul S wrote:
Sticking with the Hammond chokes?

Sticking with whatever I need. The Hammond chokes are the bias chokes 40H.  I like Hammond chokes BTW, they are better then many others. The 6C33C chokes are Toroidal 10H/400mA custom made by Toroidal Maryland. The first stage is Maryland custom as well.  The single-stages choke is 15H/150mA Lundahl. I was trying to use it before and hate it – never was able to make it to sound/measure good. It was literally a trash choke… until 2 weeks ago I paid attention that it has absolutely unintuitive marking of the coils and that I connected in past the cols … against each other. What a Moron!!! Anyhow I pulled it literally from a trash box and it works very well now.

 hagtech wrote:
.  You have 30mA bleeder for each output?  Seems like a lot of draw.

Nope. It is not for each output. The Second stages do not use bleeders; the tubes suck enough current to warm up the chokes – 250mA-300mA against 10H. The bias chokes are 40H and each solder draw 20mA. I bleed another 8mA from each side. The first stage is 3 X 6E5P by 17mA each against 15H. I bleed 30mA extra.  The single-stage is 3 X 6E5P/6E6P by 30-35mA each against 15H. I bleed 8mA. All supplies with exception of bias are shorting on 50R resistor when the power is off. (I disconnect the tweeter that has a transformer with B+ aboard) The 12V is CRC full wave, completely lifted from chassis. I am not convinced that I will stay with the current single-stage configuration. My initial draft will be the second RC filtering stage in the amp side – 250R and 100uF the same Ansar cap to introduce a local path to ground. Well, will see how it works out…

The Cat

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