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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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I decided to try build amp by myself but I will need some help...
First, the parts...
1. OPT transformers- I posted mails to:
Tribute, lundhal, intactaudio, ae-europe, and today to promitheusaudio
I ask them for transformators that Ro...
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Folks,A maker of Magnetics reading along has taken me privatly a little to task, it seems I was not clear enough with some of my statements, apologies.First, I seemingly stated that Amorphous material was "always iron", that was not my intention, amo...
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Hi Romy,The builder insists that using five 400uF caps mounted in parallel to achieve the 2000uF required in that position should give some measurable benefits over using a single 2000uF cap. I really don't know if a single "big cap" c...
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Michael,
I never head Single Power gears, or ever herd this company. I kind of have very specific type of sound that am wiling to get out the headphones. It is hard to describe but it should be very-very soft and moist but still with upper bass horn...
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OK, the next step is kind of done. All transformers and chokes are done form “outside” of the amp (under the bulge). I have attached the capacitors and the output transformer to the “inside”. This silicone attachment that for the computer grade...
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Romy, in the contrary, it is very unfair to compare my 845 amp with the 6C33C. The main reason is the 845 amp used the best output/interstage transformer available, while the 6C33C's output xformer is pretty good but far from being best for the 6C33C...
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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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Well, the more I think about it then more I realized that I would like to try it. I’m contemplating to make 5-6 channels on single-stage Milq: 4 channels for each Macondo channel and 1-2 reserved for any perspective lower bass channel or for perspect...
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Hi!
Stefano just made me aware about this forum, so I registered. Interesting thread about LCR RIAAs, one of my favorite topics :-)
About the gain of the WE437 phono: Since Stefano wants to use external MC step ups, I designed the phon...
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[quote user="Romy the Cat"]There are no good ready to go transformer for 6C33C. Tangos are garbage. The 20 years back Tangos were OK for small tubes but Tango is long gone and whatever crap they label by Tango in fact Chinese transformers agglomerat...
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I am not too tailed or interested with what this Troels Gravesen does but his use of off the shelf Lundahl with two 6C33C anodes is kind of fun to watch.
http://www.troelsgravesen.dk/AudioMirror-6C33.htm
He uses Audio Mirror DUAL ...
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This is something I've been chewing on for quite some time and finally decidedto make it happen: a serious Stax headphone amplifier.I hope I can use this space as a sort of a blog-report on the progress...if not feel free to remove. I've been "forced...
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Since the “Hunan Style” phonostage-chasses is coming to me and will host my 7788-7721 (64dB) corrector (that I love) I was wondering where I can get an extra 10-20dB to run .2mV cartridges. You mentioned the Lundahl “amorphous core” transformers...
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[quote user="Romy the Cat"]Tax what are you willing to accomplish by DSETing Avantgarde Duo? As far as I can see in any playback action and decisions it shall be a straight line of sight to some kind of objectives. What objective you have in your min...
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[quote user="op.9"]the horns come out of a rakk dac with lundahl LL1674 passive outputs the midbass use a behringer DEQ2496 (26cm delay) modified with passive outputs.[/quote]James, if you use this DEQ2496 then you might find this thread worth attent...
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Anthony and Romy, thanks for taking the time to respond to my question. I want to take on this project as a learning experience both in terms of simply building an amplifier from a schematic and for my edification on sound reproduction.
I’m starti...
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Many transformers have multiple sections for primaries and multiple
sections for secondary. You can map them in any way you want, parallel or in series,
or even if you want you can love a section unused which is controversial and I
am not widely s...
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You are correct about the load matching, for the Super Mild LF channel a half-Ohm of loading change bass quite dramatically. Still, the idea was to make this SET completely without any intentionally implemented feedback. It is juts not necessar...
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This thread is a derivation from the thread:
An ultimate transformer within a narrow bandwidth?
Since my Super Milquades is up and running I’m wondering what can I do with the output transformer at HF channel in order to push the envelop of “possi...
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I found an interesting flow in the sound of my current OPTS and while it will be certified I am experimenting with park of amorphous core transformers that left over from my former projects. I am trying to remap my Tribute but it is just 40mA. It...
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[quote user="cv"]Hi Romy, I dunno if you mean the C-core materials itself or the completed transformers... if the former (perhaps a poor term in this context), then http://www.elnamagnetics.com have what you are looking for. Seach for AMCC - these ar...
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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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Roman,[quote user="Romy the Cat"]Nevertheless, if that bass was truncated between the stages then the devastations are way more severe. [/quote]That may be so, however an LF response of less than -0.1db down @ 10Hz is what is normally called "ruler f...
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[quote user="Thorsten"]I wonder, which specific line level interstage transformers have you tried, it would have to be ALL of them in order for your statement "there are non" to hold.......But, what specifically do you object to in these transformers...
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I think I have had enough time with this phono stage now to make a few remarks about it. In keeping with the spirit of this website I am not recommending this component, just reporting on it.
I got my unit off AudioGon after keeping my eyes pe...
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[quote user="Paul S"] The "calm HF" effect is something I have long sought but seldom experienced from repro, and I have blamed the amps as much as the ribbons. Mere HF extension is not enough. Hard to say whether the amp or the rib...
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Post #83:
Bias
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by
G
on
2018-04-03
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Hi Romy
I have built a Melq prototype and need some help with the bias.
This is my first tube amp build so my understanding is not great.
All parts values were used as per the 4.4 schematics. Rectifier bridges were built with Infineon SD...
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My string quartet have just spent 6 days recording haydn and being assaulted by nasty Genlecs.
I can assure you that this is NOT what I want my system to sound like.
(Actually I sort of began to see the point of them after a while.. but
that's ano...
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Gera,
tuning the amp loading is a tricky part. If you deal tube that you do not know
and the driver that you do not know then there is no way for you to know the
entry point into the game. I think the best way in this situation is not use
what pe...
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