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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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[quote user="Romy the Cat"]Well, it might sound as a heresy to you, but I personally
consider the impedance curve is a bit irrelevant in this application. In this application
you need to care only about only 2 things: if you have enough power in yo...
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There are still room modes to contend with the first starting at about 41Hz.Here is an impedance plot of the left Bass Cannon as seen by the amplifier, so including speaker cable.As you can see I managed to get Fs down to about 44Hz and it turns out ...
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Finally, it has happened. Sound. Two weeks ago I had a couple of mates help me carry up and install the first DSET on its pedestal on the horn stack. It was quite a bit of effort and three were definitely required for the heavy but delicate operat...
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So, my two problems have been fixed, I think.First was the issue with the 6e6p for the HF Channel not being able to draw enough current. I checked the bias and it was fine and the potentiometer allowed plenty of adjustment so I changed nothing in t...
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I was just trawling over at diyaudio.com (like I do) and a recently updated thread caught my eye and had these tidbits from Josh the Visitor regarding critique of Macondo/Melquiades and Romy's stated viewpoints of GSC:[QUOTE]Well. I disagree that dig...
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[quote user="Romy the Cat"] martinshorn wrote: I expected your disappointed resonance already.
What you write completes the impression of the evening. I didn't go that far
not to blow up the mini article unnecessarily. But be honest, you knew it al...
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So, the first DSET is still downstairs on the electronics bench and I am back to work for a while, but not too hard and not for too long (I hope). I've added all the filters and checked and tested and changed some more things and decided that it was...
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[quote user="Romy the Cat"]If you like very slow interpretation,
like I do, then you might start to listen some Barbirolli Mahler… [/quote]I've found Barbirolli Mahler 6 & 9 by New Philharmonia Orchestra and Berlin Philharmonic respectively. I...
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Hi briefremarks,I have the same dac and front end as you. The Phasure stuff is as good as digital gets in my opinion and I am yet to hear better in my part of the world. The Orelos would be interesting to hear...for me at least. There is a pair in...
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Hi Romy,I've been reading the 6e6p-dr datasheet and it seems as though pin 8 (a shield) is recommended to be tied to a lower negative voltage than the tube cathode. Have you bothered or experimented with this? This is no problem in the DHT Channel ...
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[quote user="N-set"]
Congratulations on the build! anthony wrote: Yours uses all toroids, or mostly so, which are more efficient than the EI that I use.
Why have you chosen EI vs toroids? The latter emit less.
Cheers,
Jarek
...
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...to call in if you ever did get to Aus. There is plenty to see and experience here, and the weather is great just about all the time. A critical ear applied to my efforts would be most welcome.
[quote user="Romy the...
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This morning I logged the mains power draw so that I can properly size the fuses.
...
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[quote user="Romy the Cat"] anthony wrote:I woke up this
morning ….
It was funny that you named it “In my dreams”. Whan I was “designing”
and building the Milq I had a lot of dreams about the problem I had. I am not
am amplifier designer or some ...
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[quote user="anthony"]I woke up this morning to have the brightest thought that my DHT issues are probably caused by how I have wired up the filament transformers. [/quote]After rewiring the filament transformers this morning, I have spent all day tr...
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I woke up this morning to have the brightest thought that my DHT issues are probably caused by how I have wired up the filament transformers. When I ordered all the transformers for this project I gave Lucas of Black Art Automation the design brief ...
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[quote user="Paul S"]Anthony, congratulations on getting your project to this point! I mention without referring back to your schematics, I think you will be glad to have test points, along with variable resistors (trim pots) to re-set operating poi...
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[quote user="anthony"]Hi Romy,So, six channels are now operational in the first DSET. By up I mean the anode voltages on all tubes is about right and the currents are in the ballpark of where they need to be. I am yet to check the DC Offset so hope...
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Hi Romy,So, six channels are now operational in the first DSET. By up I mean the anode voltages on all tubes is about right and the currents are in the ballpark of where they need to be. I am yet to check the DC Offset so hopefully that goes ok.Ini...
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[quote user="Romy the Cat"]I think it takes around 60 seconds on my amps. I have 2 minutes delay for high voltage, so it all within the limit. [/quote]
That is good to know Romy. It was quite frustrating when I tho...
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Hi Romy,Further to my earlier message, I've measured the bias voltages for the driver tubes in all Channels.A -4.3V not adjustableB -13.82V not adjustableC -4.8V not adjustableD -4.2V (ran out of potentiometer travel...may have to adjust a resistor)E...
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Hi Romy,What a busy year just gone! Finding enough time to just sit down and get the DSET's going has been impossible, but I have time now and have started the process.At the moment I am introducing some high voltage to the first amplifier chassis, ...
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You said it sounded like a phase problem and it was. Couldn't have been easier to fix either. ...
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[quote user="Romy the Cat"]
The biggest mystery for me and it is what I am thinking
about all time is what digital filter does to my sound that analog could not.
Is it a precision of the Bessel curve? I hope it is not. I hope it is something
tha...
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That is a lot of output at 6Hz. I hope the Yammies have DC speaker protection because I'd hate a fault in the chain to unleash a heap of DC on those IB's...it may cause a a significant tremor at castle Romy....
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Although difficult to tell from the photos, they look pretty close to being time aligned too Romy, by the time you allow for the height of the baskets in the ceiling and their overall height above the horn stack relative to your sitting position. ...
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[quote user="Romy the Cat"]I engaged is a discussion about my IB project with some guys
who do IB for a while:
http://ibsubwoofers.proboards.com/ , the My Projects Section, I think you need
to login to get it…
What is interesting is that the...
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Good news so far Romy. I have been wondering where things were at regarding introducing gain into the Placette. ...
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[quote user="martinshorn"]
Above shows what is possible (more or less) in terms of pressure. It shows the horn will not provide pressure below 50 cycles. And this is likely to be true. It will not magically appear out of nowhere. This does not exclu...
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[quote user="martinshorn"]So thinking stereophile was there thursday... [/quote]Reichert mentions Saturday twice in the article. Not that is really matters. He did not like them, the youtube video sounds horrible but you heard something interesting...
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