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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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The 6sn7 is a fine amplification tube for use in preamps or gain stages, but it has way too high of an output impedance for driving power tubes. This is my personal preference. It also depends greatly on the topology. Maybe George u...
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Here is a stupid need of DIY audio level. As many of you know am big lover of Nichicon electrolytic capacitors, even their lowers grade sounds right to me and never made to think about anything better. Still the Nichicon never stopped to surprise me....
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[quote user="ArmAlex"] Romy, I plan to build Melquiades. But there are couple of questions:1-One of speaker options is Gryphon Trident, it is an active bass speaker so Mel should drive MF & HF only. In your opinion can Mel drive these speakers? ...
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Adrian, Fair enough... it's not about power or gain in your case, just making it sound as clean as possible. Well, if you go back to my earlier post on findings, I list the basic operating values. Just to recap them here:Plate supply ...
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"... and I do not know if 3A/167M is better than anything else and I do not see why the metal socket is necessarily better then plastic – the socket is not the part of the tube."As you know, the 437A is like an on-steroids ECC83, ALL glass built, no ...
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[quote user="deemon"]Do you mean a battery bias , Brian ? We didn't try it because of 1 V bias voltage - I don't know if the battery with this voltage does exist . I know only 1,5 V and 1,2 V cells ...... maybe using some chemical reactions we can ob...
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Hi Saturntube, 40 Hz - 200Hz = wooo, woo, wo, - hm... Forgive me as I'm not talking about horns right now, but some sort of 4th order *acoustic* roll-off at 200Hz may apply with a horn as it would, e.g. with a second order cross-over in a box-spe...
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Hello chaps,Firstly, something I forgot before was that the high impedance coil will have more turns... so the DCR etc will be stepped down as seen by the voice coil. My guess is that overall it will still provide slightly less damping, due to imperf...
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[quote user="Romy the Cat"]Herman, I completely do not understand what you ask. The physical aligning of magnets is absolutely irrelevant. The crossover slopes are irrelevant. [/quote]OK.[quote user="Romy the Cat"]Why would you need to do switching b...
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Here is where I stay with my enigmatic Remedios project. I build inside of top box at resonator that I tuned 50-60 hertz. So basically it is under two square foot enclosure with a port tune at the bottom of resonance frequency. The port is shooting ...
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Kunashirsky, I do not want to “estimate the remastered vinyl obtained by this technology”. Nether I want to “go to Page 8 of your site” or to any other page. It look like you have some kind of strong believes about some kind of things, so do I. One o...
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[quote user="Romy the Cat"]Kunashirsky, I do not want to “estimate the remastered vinyl obtained by this technology”. Nether I want to “go to Page 8 of your site” or to any other page. It look like you have some kind of strong believes about some kin...
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In this exalted company its probably not up to much but I've not heard anything else demo-ed that makes me want to change. :)Front end: Vista laptop with XXHighend software (best sounding bargain in Hi Fi). Fireface 400 external soundcardDAC/Pre amp:...
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[quote user="deemon"]Hello , Roma ! I think that you can use only a back chamber with decreased size , and a serial capacitor . I think that there are no ways besides ... [/quote] Actually it would be a serial coil, as I need a low pass no...
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I wish it would be true and I would be busy to build my loudspeakers. Unfortunately it is a lot of work and I did not have even time to look at my site. The r22, the power resistor is not necessary the one which mitigate voltage in your tube....
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[quote user="noviygera"]I have been thinking about how nice it would be to have have a good sounding DSP for crossover and delay functionality. I know this subject was covered here before but what was talked about is this DSP is not that good, and th...
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Romy,The only card that seems serious is the Creative Live Drive series. They have the capability of encoding at HDCD sample rates and also have a front panal input / output fascia with many conntrols and buttons to explore and screw up with. I have ...
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***The proper loading value is difficult to say without knowing your system, as it is partly a preamp and ultrasonic RF issue as well as one that involves the cartridge and audible frequencies. Some cartridges have frequency abberations within ...
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Hello, 29-year-old, audio enthusiasts. I'm still alive and
although I am struggling to manage my life between three small kids and a lot
of heavy work, I still man you told my site attentively. I will be happy to
collaborate with you on anythi...
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[quote user="anthony"]
One question that I still have regarding the
L-Pad on the MF Channel is why you did not lose more gain at the filter before
the MF driver stage? By my reckoning a resistor change here would shunt
more signal and you would ...
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Yes, it is an interesting idea. There are a few uncrown points
in there. The lithium iron phosphate are fine as a storage but how they impact sound?
If you look at the experience of the people who use batteries for grid biasing
then you will s...
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I can only offer a simple solution to this problem.Decide on which row you wish to place digital services. I would also include anything that has a switched mode power supply because of the Y capacitor thing. Assume Row 1 will be used for digital s...
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This is classical common mode noise interference on a common supply. This type of noise will pass right through any power conversion technology and in both directions. Due to the timing variations, I would expect it to be a little bit of mains inte...
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Lx_, it is so and not. I never made a secret that PP has some sensitivity to line before it but for the people who do not use it the degree of the comment would not be possible to understand. Even for PP the relative degree of the comments like my co...
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Here is another advantage of multisampling and DSET in particularly. There are many moments in amp that in one or another degree affects transients.The capacitive coupling for instance works fine but as long the amp sits in class A1. As soon amp hit ...
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[quote user="Romy the Cat"]A few post above Bill mentioned that he run his PP2000 from AdeptResponse power conditioner. I am not familiar if AdeptResponse helps to separate one PP2000 effect another. I am not also familiar with AdeptResponse its...
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What you guys are missing is a grand scale of the concept. You are talking about voltages, implementation, electric chairs and the rest of irrelevant crap but I am talking about the pure inspiration from the concept. No one runs to solder anything. I...
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Hi Romy,
I currently use a 3 stage transformer coupled amp with 112's, 71a's (as drivers) and your favourite 300B output valves:-) I'm not sure whether I'd go back to a capacitor coupled amp. I just acquired some Tango NC20 IT's to replace the NC...
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Latterly is have been some controversy with new Placette output impedance, it does not look like it is 3R but rather 37R according to my measurement. I need to clear it with Guy. I also desided to address (since the Active Placette is a discrete op-a...
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[quote user="diz1"] Are the First reflection points for horns speakers are different from other type of speakers? [/quote]Yes, the sound from horns does not propagate straight along with the line of sight but it curves according to the Xchyler eq...
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