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Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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R2 gets hot. I think I mentioned earlier that it will also be hot...it is dropping 250V and running 17ma which is a bit over 4watt. From memory, that tube should be biased to about 35mA.Bridge recitifiers will only really matter here if you are usi...
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Those both look fine, but all your voltages are hot...all of them. From afar it seems as though the primaries are not correct for the mains supply by about 15% eg. wound for 200V primary but you have 230V, or something like that. Where I am has nom...
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[quote user="Domidaw"] I also checked the voltage of the TR2 transformer and although the marking says 440v, it really has 508v!?!?
[/quote]Domidaw, when you read 508V for TR2, was the transformer in the circuit with a load applied or was it out of ...
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I am sure I made a reply last night, but it is nowhere, so here it is again.44V across R22 is equivalent to 0.88A which is way too high and would require a resistor rated better than 40W. R2 is dropping more voltage than it should. I would look at ...
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R22 is there to drop the B+ to the correct level and needs to be rated so it can dissipate quite a bit of power i.e. heat. It is 12 watt in the schematic but maybe the one you are using is rated lower or perhaps you have a higher secondary voltage o...
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...if a 50yo 8" woofer could do much more than 90dB at 50Hz with anything approaching 'ease'. Remedies in this configuration are a lot like small 2-way standmounts in that we are trying to get a lot of bass output from something small and excursion ...
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[quote user="Romy the Cat"] .. what I am saying that playback certainly deliver sound but also it delivers let's call it at lubrication for sound which make consumption of Sonic messages to be more palatable for our conscious. This aspect, is this MS...
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...is that Dannoy were conceived and built in that upper box: pull out one Scanspeak 10" and put in the Tannoy 10". The remainder of the Dunlavy tower is redundant....
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...that the Dunlavys have ever been in the mix N-Set. Pretty sure they are parked up in the corner with the rest of Macondo/Melquiades....
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Once had a Xindak Class A amp here on loan that was not too bad once it had warmed up, but the first 20 minutes sounded like it needed to include a lot more fibre in its diet. ...
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...that SS amps do not require significant warmup for best sound. Class A SS in particular need time to get up to temperature to sound their best. A 25W diy Class A that I have here does not stabilise bias for a good 40mins to an hour, more when am...
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[quote user="Romy the Cat"]Dynamics and they mostly come from electric relationship between amplification and drivers. [/quote]I would certainly add to that the relationship between the driver and the enclosure. I know I am on the other side of the ...
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Because the Yamaha units are just not available in Aus and I do not feel paying $250 shipping for something 20yo and probably in need of a recap I ended up going with the MX400. It is less expensive here, brand-new and while getting used to things I...
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... so the new drivers, particularly the S2, may not be such a bad deal given the price of older drivers. The woofers would probably be less of a risk than the compression drivers, and at least new cones and bits and pieces are available. ...
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No time, can only post in snippets...The second hand S2 and 15" Vitavox that I have were all compromised by age and use and have been thoroughly cleaned and remagnetised and where appropriate Sent to the UK to be reconditioned by Vitavox. ...
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I have two pair of the old 15" Vitavox: two drivers coned as K15/40 and two as another less common variant with a softer suspension and lower Fs but I cannot remember right now the name. Shortly, a brand new pair of K15/40 shall arrive along with ...
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I've played with this a little. We are 230V in Australia but many years ago the standard was 240V and the power coming into our house is still a nominal 240V. I remember playing with the Placette with a step down transformer and was not getting...
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How things come into our lives can impact how we react to them over time, and playback is no different. I was adamant that I did not want to fully develop a diy system from scratch because that could be too much learning and immersion in the "proces...
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...well, I do not understand how a "playback that loves you whomever you are" is to sound like and cannot even imagine what sounds or types of sounds could illicit that particular emotional response. It is not that I do not believe you Romy, because...
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Romy, yes it is an interesting subject and one that I have thought quite a bit about although not directly from the angle from which you are approaching it.One of Macondos great strengths is narrow directivity from high frequencies all the way down t...
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[quote user="Wojtek"]I have a warning that 60 years old Tannoy 10" red crossover is a sealed unit you won't be able to update and that nobody has the correct diagram of that crossover since Tannoy archive was consumed by fire.[/quote]I have a pair of...
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Ahhh, the penny has dropped. Until now I've refrained from commenting because I have not felt as though I have understood the situation. Finding any sane reasoning for your current direction, at least any reasoning that seems to make sense in my cu...
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Have not heard the Lavadin (nor heard of them to be honest) but with that analogy I think many will understand what you are trying to say. Let's hope that the happiness continues......
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Thanks for this one Romy, very interesting...it sorta ties together several things that I have been thinking about lately. I guess I am lucky that the Bass Cannons can be run off 9w from the DSET bottom channel and from memory I get about 115dB at 1...
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Nice one with the new video.
I can recommend a good Tasmanian whisky from Lark or Sullivan's Cove. Am partial to a rum cask finish myself during these winter months.
[quote user="Romy the Cat"] anth...
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Well, one thing about the videos Romy is that they are more difficult to get through for me than the writing, but more informative I think, so thank-you for doing them. There is no way I can find an hour to sit and watch each of these so it was done...
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...you usually are quite thorough in your assessments.I use Macondo also for watching concerts and would also really appreciate any insight you may have into making surround sound successful even though this is not what you are doing here. The Trinn...
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[quote user="Bill"] I have set up a 16 channel system with 7 floor Edgar horns, six inexpensive height, and one overhead speaker (all under $150 each) and one subwoofer channel, all controlled by a Trinnov Altitude 16 pre-pro, which is a computer...
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Bill, or Romy, what I am missing here is some kind of visual of the setup whether photos or a hand-drawn sketch. I'm intrigued and would like to know more about it, especially in terms of its use with two channel and surround sound. I am using a pa...
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Romy, it is the UB horn that I need to first tune. Have found an earlier post of yours where you describe your process and will roughly follow it. First thing though is to measure an impedance sweep of the horn sitting in place to get the base line...
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