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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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Here is another question that almost from the DIY-Audio universe. Dima is finishing Zaratustra II amplifiers. It will be quite interesting beast and I’m slowing begin to think about the power supplies – it will be my responsibility. The Zaratust...
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[quote user="hagtech"] Iwas going to ask you about that funny looking damping material. Then you explained it at bottom of post. Very clever to use mouse pads! Lately I've been using cork & buna rubber sheets from McMaster-Carr....
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Oh, Romy, I meant the air caps in the corrector loop of course!!!Adjusting PS caps I leave to AA morons and alike.Believe me or not I did go very serious about the proper choke input operation.What I meant is that I have to get hold of a scope to che...
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Romy, As you're planning to run a 6K load, you can run less current without the transfer curve suffering as much. So, another shot at some numbers.... rather than use a RC setup to drop the voltage, Hammond (not my favorite) make an open f...
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Yes, steel chassis can be both good and bad. It likes to conduct magnetic fields, so you have to treat things appropriately. A little spacing under a choke can go a long way. Otherise you have a 120Hz motor. I have another tri...
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Here are some schematics of what I've done. Sorry for not being the best at drawing. Some of the part choicesare a function of what I could get or what I've got and may not be optimal.The power entry of the PSU box:The PSU box continued:The power tra...
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I bought the Lundahl chokes for L1 and was not able to us them and they were insultingly sharp. For the L1 you would need more henries and more DCR, the higher DCR will sound better and the “bad” and “cheap” Hammond chokes worked very fine. You...
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[quote user="Paul S"] Which caps exactly did you decide to try? I don't recognize the big black jobbies. Are they oilers? Are they 200V? [/quote]
I did not “decide” but went with what I had in my hands. They are the Ansars from the...
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[quote user="Romy the Cat"]3) There is a mistake in Milq circuit. The B+ of the driver stage has almost insufficient amount of critical inductance. It was because I drew the circuit having the Super Milq in my head where the PS was feeding 3 stages a...
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[quote user="hagtech"] Yes, steel chassis can be both good and bad. It likes to conduct magnetic fields, so you have to treat things appropriately. A little spacing under a choke can go a long way. Otherise you have a 120Hz motor.&n...
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[quote user="N-set"]Oh, Romy, I meant the air caps in the corrector loop of course!!!Adjusting PS caps I leave to AA morons and alike.Believe me or not I did go very serious about the proper choke input operation.What I meant is that I have to ge...
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[quote user="Romy the Cat"]I bought the Lundahl chokes for L1 and was not able to us them and they were insultingly sharp. For the L1 you would need more henries and more DCR, the higher DCR will sound better and the “bad” and “cheap” Hammond chokes ...
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Dominik,
I do not think that you need suggestion from me. If Pieter looked at the schema then everything is very much identifiable in there and he shall know what to do. Let me to give you alternatives that are not at the schema.
The 12,6V/...
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[quote user="Wojtek"] In my old email to you I've mentioned that I have a pair of monster transformers 310-0-310 2A .I'd like to use them as a main transformer for bi-tri amp configuration ,with input choke load and folowing separating (tree branches...
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Gordon Rankin of Wavelength Audio did a series of one-stage DHTs with a step-up transformer input about ten years ago. I think they were called the Mercury series. By all accounts, they sounded good, but of course had limited gain, not much power and...
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[quote user="floobydust"] Romy,
As you're planning to run a 6K load, you can run less current without the transfer curve suffering as much. So, another shot at some numbers.... rather than use a RC setup to drop the voltage, Hammond (not my fa...
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Hi Roman
I'm slowly gathering parts to build your amp.
In my old email to you I've mentioned that I have a pair of monster transformers 310-0-310 2A .I'd like to use them as a main transformer for bi-tri amp configuration ,with input choke load and...
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[quote user="hagtech"]Yes, steel chassis can be both good and bad. It likes to conduct magnetic fields, so you have to treat things appropriately. A little spacing under a choke can go a long way. Otherise you have a 120Hz motor.&nb...
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Here is the general specification for the parts that I used. The selection of the parts implies some liberty of course. It will be your amp after all, not mine - do whatever you wish. In some case when I feel that requirement is critical I will stres...
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Since I know about a few ongoing attempts out there by different people to build Melquiades I would like to share with some of my observations regarding corrections, simplification and possible modifications of Melquiades amplifier.
Obviously you ha...
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[quote user="nl"] Gordon Rankin of Wavelength Audio did a series of one-stage DHTs with a step-up transformer input about ten years ago. I think they were called the Mercury series. By all accounts, they sounded good, but of course had limited gain, ...
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The “Enjoy His Music” published the old celebrated by many DIYers Herb Reichert’s article about his 300B amp ideas.
http://www.enjoythemusic.com/diy/0709/flesh_blood.htm
I read it before but reading it now, after a few years again...
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