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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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First as stated before, when I 1st received the unit no hum issue it was after it was sent back twice that it came about. 2nd if I use my other conditioner, a Purist Audio Design all is dead quite. The humming out of the speakers stops if you plug th...
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I have owned a PurePower 2000i (prior to the company moving its production back to Canada) and while it had a positive effect on the playback it created more issues than it solved with its noisy switching recharging circuit and the internal fans. The...
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What problems with the Johnson sockets are these trying to solve, again? Would they really be better overall than a lower mass design along with chassis through-holes, like the ML2, etc.? If a reader is using these, do they appear to better stabiliz...
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"Success" equals better except for added hum? How lucky is APS to have customers like this?!?Any dimmer switches within a mile and a half of the system? Any variable inductors connected anywhere in the house? Root out anything like ...
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[quote user="decoud"]Romy, apologies for being unclear: the amp is not yet built: this is just a spare chassis I am offering for others who may wish to build it too. Inputs and outputs have not yet been added to the chassis. I therefore cannot co...
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I was playing with new power supply over this weekend, trying to optimize everything. First I got rid of bleeders at all B+ - it has enough critical current with them according to my measurements after the bride. All supplies after the first ...
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The fullrange Milq will be built in an oversized chassis with the intention of adding maybe two or more channels down the track and perhaps some line level crossovers. So I will up spec. the mains transformers so they can handle a larger draw and wi...
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Gentlemen, I can only hope to be wrong on the air-borne feedback.Actually your project Anthony made me think of coming back to my Staxquiades project - a Milq inspired monster amp for my Stax headphones. Do you have a source of big PSU Nichicons at ...
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Anthony, I asked because I could not gauge distance from the tube pins to what I took to be large inductors shown straight underneath them. Distance will do it, but I think the critical distance will vary, depending on the strength and "pattern" of ...
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It is not a fear of forced ventilation per se, rather a fear of dust permeating the enclosure. You may have noticed that the power supply chassis' have been designed without ventilation holes on the 'roof'...this is to eliminate dust-fall into the i...
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Yes, this is what I meant: link the pins using heatpipes to a heat exchanger, in fact I wonder if one could use the heatpipes as the filament conductors direct.The yamamotos are beautifully made but badly designed. The receptacle of each pin is a spl...
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DA, from what you say I do not think you need actions to do now. As I understand the power transformer for the amps most likely has been made. Since you are in design phase and the look forward to have a sever voltage then get 1-2A 12V transformer w...
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Maybe I was a little hard on these tubes. I have this habit of listening to noise floor at extra high gains. Maybe 20dB above loud. It is part of the design process for me. I like to hear all of the hiss, whine, buzz, hum,&nbs...
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It took me a while to figure out an effective grounding scheme for the system, and it has taken me until today to finally get around to lifting the K&K's chassis ground at the wall.The unit is still grounded to the whole system dedicate...
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Very nice set up. And yes, the HS-80 has a coolness factor, whether it helps the sound or not. I did a double-take when I saw your motor with all those green digits. Then I read what you did.My RY-5500 came with an external 120 V to 100 V step-down p...
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Thanks for your thoughts Paul. The subject of the snubber has already been quite discussed.IIRC Romy has turned the whole idea down as uncessary in his context. I am afraid thata snubber may be a sonic move rather than only "engeneering". I'll first ...
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Paul, so far the interconnect shields were connected to the phono pre grounding bolt only--I do not want to pass any equalizing currents between the TT and the phono via the shields (the TT chassis, armtube, etc was connected to the same place via a ...
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Romy,Try running the left and right signals from the stereo arms, one at a time, into the known-good mono phonocorrector. If the problem is not present then you know the stereo corrector is to blame.Are both left and right channels in the stereo cor...
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This thread has gotten distressingly DIY, hasn't it?But I agree entirely that the pot should be given the smallest assignment possible, meaning, pad/dial-in/isolate the hard line, as far as possible, up to the necessary-only balance range, and then i...
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(Quote from your post) "... by building any serious horns you will very fast overgrow the ML2's ability to be flexible." Yes, this is in fact what I meant by "limitations imposed by of a pair of SET amps such as the ML2s". Would it be possible to ada...
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Post #8:
Pics
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by
cb
on
2007-10-25
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Hi Romy Here are a couple of pictures below. The chassis is 18mm mdf and the copper plate is cut from 0.7mm roofing/cladding copper sheets. Nothing too heavy attached the on copper plates and it seems to be ok. No fan for cooling, so lots of hol...
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and I hope it will be up to the level … of FM in term of enjoyments. Anyhow, the phonostage is the already pack up in the chassis and running. I dropped the B+ supply to 270V and the R1 restore to 120K, keeping the 100V on the first plate. I can’t wa...
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Romy says "
I do feel that enter charging circuitry is the biggest liability of PurePower unit...
It would be a hideous discovery if it turns out that the PurePower unit sounds so good…. because the distortions f...
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Jessie, congrats on the new *TEFLON* sockets. Did you do the cap shuffle, too, while you were at it? And what's this you say; you had to mill the sockets (or the chassis) to get them to fit? Tres droll!Now that your operating points are stable you...
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N-set,actually, as you drew it, it became not too complex amp. What I would like to find is some kind tube like 833 only twin triode. Then it would be possible to have one chassis with a single drive and two output power stages. With 100W on fil...
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N-set, I am not the one to double check your mathematical solutions, that's for sure. I wonder if in practice the curve values here are effectively tied to variables? I like the Chimera idea, but it has no "locked curves" to contend with, and it us...
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Well, this certainly shrinks chassis size, if nothing else. I've never looked at the circuit, but there has to be some sort of transformer function at each end, up and down, and the easiest way to do this would be with transformers ;>). ...
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Paul,I have an L2 that uses this tube (at an alarming rate!), so I try to keep a stock of them... While sniffing around, I came upon a deal on eBay that may interest you (since you are in the US)... Check out item number: 150077022964 ...
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There is a Restaurant at the border of the Universe. Well, it is not really a Restaurant, it is awful, stinky and oily hut where you can get only one meal whatever they call lunch with dark, glibber Peppermint Sauce. Always the same. Day for Day. And...
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I'm strugling with dreaded Mcintosh Mr67 tuner . I borrowed one from a friend and it was very nice ;clear , crisp , dynamic so I went out and bought one for myself . It sounds like a mud and matches 100% of your description of average tube tuner...
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