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Post by misterc on Sept 6, 2021 21:59:43 GMT
Congratulations MisterC on your find, you mention customs, does this mean you imported from the USA? Importing from the US, Asia or Australia is a doddle compared to Europe Well the 15i was purchased this from Switzerland its quite unique extra power supply for the digital section, updated dsp and Wadia digimaster filter, revised i/v plus pmc 1702 dac chips. Infact it's a total upgrade both power and dac boards from investigation it looks very similar to Wadia 850 dac board but with an integrated digital input board . So far its proving superbly musical and engaging and will make a perfect project. Just putting the finishing touches to programmable dsp array replacement for the digital filter which will oversampled to 706khz 16 times redbook The image focus and texture are first rate the bass is heĺllllllllooooooooo its rock the casbah z
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Post by antonio on Sept 7, 2021 0:46:26 GMT
A very nice find then, I just assumed the most likely place to find one was in the states, me and my presumptions
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Post by misterc on Sept 7, 2021 15:22:13 GMT
Well day 3 of the siege of audio completeness and its shaping up to be the shortest campaing in history ( maybe a touch exaggerated ) Big W15 deux is really kicking some sonic ass at the moment the sheer three dimensionality that this thing delivers is quite stunning coupled with total and utter disappearance of the speakers. It's going to be a really good week I feel. Here is an image of a standard Wadia 15 at the engine room level if you like, this is not a image of my personal one as mine doesn't resemble as it left the factory condition much
The next three are of the inside of the 15i BEFORE rearranging started
Note seperate supply for all digital processing and D2A conversion stages not previous on the stock 15 model
BB 1702 K grades (red dot above pin 10) in dual differenical configuration
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Post by hifinutt on Oct 6, 2021 21:35:54 GMT
Hope you chaps have a had a good week and life is being fair to all of you.
A varied and very different week here a NA-MAC. (non agenda measurement audio central ) some interesting projects passing through the doors this week thought you would like to see what we have been upto.
Serious bruiser time with the 'if you are hard enough heavyweight contender' of pre amplifiers the Boulder 2010 all 50Kg's of it (if you count the cables!) This is a true dual mono design taken to serious lengths to deliver very low IMD (intermodulation distortion) the ability of both channels NOT to talk to each other! Each channel has a dedicated fully shielded enclosure for each channel TOTAL isolation. Each module detaches independently and is supplied by a serious power module sporting independent rails for each mono channel and separate digital logic control circuitry. No mucking about here! A very good friend of mine uses the term 'Non pussy' for pieces like this, seems very apt!
Twin custom dot matrix displays gives you all the information you will ever need to know, even across a 50 foot room!
Looking to power your speakers direct, power amplifier insignificantly superfluous with this output lol.
The unit is in for some upgrades so will keep you posted on developments
Next up a really tidy Belcanto Designs Pre3 VBS (virtual Battery Supply) for a full service and some upgrades, these little units never cease to amaze me, with some cleverly placed upgrades and a quality PSU they really kick very hard a lot of so called 'quality pre amps' into touch, do not let the size fool you (said the Bishop to the actress) second image is of the some of the finial measurements in the REAL world while driving a load, not the channel balance is very,very tightly matched to each other.Not bad at all for 12 year technology
I have used the lab note book feature in the Lecroy scope so you can see how each measurement relates to the wave form being sampled. You can see where the PK<> (peak to peak voltages), RMS (root mean square, the REAL value) and SDEV (standard deviation) the maximum difference between the measurements so hopefully it will make sense for you. Also note the scope has taken over 60K samples for these readings, this is not a plus and there you go measurement
Lastly but not least a pair of Cary CA309 valve mono blocks sporting two (2) pairs of 300B's (KR valves no less!) delivering around 45Wrms, these lovely beasts are in for a full overhaul and upgrade programme again more as we progress with this project.
so agree about the pre 3 , a decent psu really lifts its performance so much
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Post by misterc on Oct 12, 2021 13:52:30 GMT
Well time waits for no man or tides, though in 1225 they had more pressing engagements to attend to rather that is my next delivery due shortly? Unbelievably its been five weeks since I last updated the Coherent blog, where the hell does time goes these days? One moment its Sunday evening the next its Thursday afternoon Well a lot has happened in those 'short 5 weeks' New audio designs have been benchmarked and tested to within an inch of their lives and ours with earth bond and isolation testing lol. Several Coherent Cable reviews have appeared in Hifi World over the last few months and we are pleased to announce that all of them have been awarded Five globes which we are more than pleased with. More on that with later updates. Currently working on a new dac, headphone amplifier and rather neat smaller box version of our Liquid Music pre amplifier as well. For some explicatable reason I have been collecting older Wadia pieces and for my sins have around 38 on them now (insert comments relating to bonkers/mad/needs help here) The Wadia 15i has been undergoing some 'internal restructuring' on a fairly epic scale, have removed, replaced, added and inserted around 240 components over three seprate sessions, only have to remove the mains circuit board once thank to the absolutely first class JBC soldering suits we have in the lab. Once you use these tools, you sudden realise that you really needed them some 20 years ago! (Hindsight being a very wonderful thing!) It also gave me a chance to try out the new micro hot air station and vacuum pump removal tools one of those great but simpe ideas that just make life so much easier.
So, you spent a great deal of time, effort and funds on this 24 year old dac that could well be an audio relic consigneed to those place of amazement and wonder for all things past a mesusm!
However, on this occassion quite the opposite, I will elborate more a later in the week so its back to work for myself, a couple of amplifiers needs some TLC oh the joys of the audio world
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Post by sq225917 on Oct 13, 2021 18:36:56 GMT
I often wonder how much the advancement in SQ has been due to component aging rather than better things.
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Post by misterc on Oct 14, 2021 11:14:06 GMT
I often wonder how much the advancement in SQ has been due to component aging rather than better things. Simon,
It is combination of advanced materials and manufacturing technics. New dsp filter design (that did a take a while!) and a new internal master clock.
Next step is a full QP-3 power supply installation just waiting for the new circuit board layouts and custom Tx's, casework is finished
Oh and it doesn't measure as good as Batok or a May. But if I worried about that I will still be using the MSB
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Post by sq225917 on Oct 14, 2021 16:46:02 GMT
That was just a general musing rather than specifically to you great dac works MrC. Thanks for the extra insight though, much appreciated
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Post by misterc on Oct 14, 2021 20:34:21 GMT
Apologies for the image quality, have just finished the raw parts tally for the Big W's new ultra quiet psu and it will be fitting inside a match W 15 case was well, that took some doing lol, more on that later. It did take quite a while to draw up a dedicated cnc'd 10mm 5052-H32 material direct replacement for the IEC hole, just waiting for the new matching aircraft spec DC connectors should be here by the end of next week.
Its coming together now in between the amp repairs and dac upgrades.
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Post by misterc on Oct 24, 2021 16:48:11 GMT
In ther last few weeks our dac tally count has surpassed sixty that have been in for apprisial this year, apart from a stand out four a great many amir touted measurefi dac's which quite frankly been either bland as dishwater, with the musical interest of dog poo in next doors patio. Or a combination of ultra polished contrived dac's that have been design specifically to banish the digitis from memory (which is a shame as it's been gone for a quite a while from the long established brands now. Ranging from "Gee whizz Dexter listen to that 35 foot Eric Clapped-out giving me goosebumps!" not sure what they were smoking? but hey its different strokes for different folks! Bags of texture and depth with a very carefully engineered top end response Oh plus a SINAD is 150 range (Yawn). Next up are the those chifi markers who are realsieing the click and drop dac's just do not cut it anymore, dispite having a noise floor before the Apx555B thresh hold (double yawn) Lastly those dac's who are trying to emulate the chord dave crossed with the Naim dac stage from the that awfull 555 streamer/dac thingy. SO for those who hark back to the Halcyon days of sticking the heads in a bass bin stack at a Motorhead concert circa early 80's Bomber tour, with just a touch more bleeding edge. What happened to producing equipment that ties hard to remove itself from the replay chain???. Maybe its all an asr conspiricy to hoodwink the mass audio buying public into think that £1200 ultra measure fi dacs are the pinnicle. Having listned to enough f these things to realise only a handful really do take you long way down the road of having a totally contented and enjoyable listen to your digital music playback. So far only one of the latest crop of 'well engineered dac's' has come close to delivering a real decent immsersive, engaging and satisfying performance, then there is the price, which I will omit as its serious enthusiat consideration only. In the real world Oli's Soekris is a great choice, I have been playing with its bigger brother the 2541 and its rather decent for the outlay around £1300. Alan's Spring 3 is also a great choice. If you are feeling flush then the May KTE edition is worth a swerious listen, the Denifrips Terrminator + its a great dac also (not for me) its a bit to pipe and slippers compared to the rest, but it does have it's many redeeming features, though technically its not a nos dac only the Holo equipment has the genuine NOS option to select, and the lose the PLL and place a DDC in the chain then it really sings. For those looking for a more involving sound then the Rockna Wavelight is a another option you should audition its splits the T= and May KTE rrather well, and offer a genuine alternative to the the other three well publisied units. So far the Wadia has not been troubled as of yet, the Rockna Wavedream is awfully good if you have the funds, may just need to sell half a kidney for this one! Will really go into depth wity the Wadia in the next edition of the blog, work load has been quite something in the last 4 months so not had the free tim to really scribe a post of interest. Currently have the Grimm MU-1 streaming transport in for evaulation, more on that in a later a post. Leave you with an image of the quite intersting Grimm MU-1
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Post by misterc on Dec 26, 2021 15:57:35 GMT
Well after dodging the the sprout mountain (Devils spawn), the traffic into central London yesterday and waves of hung over dog walkers shuffling past the house with forlorn & never again expressions on their faces being dragged by a rampant poddles in search of Suitable watering post today I can finally catch up the blog section as time has slowed sufficient to enable some quality insights.
In the last months its been exceptionally busy and personal project time has been limited, however I have spent a good thirty hours with the 15i in the last week.
It has undergone some pretty major surgery and new additions to its original factory condition, while all of these were performed in stages and been have to time and bed in. Around 500 hours of solid playing time has been clocked up by Wadia 15i
Also during this time two new digital streaming transports have also seen action while being bench tested along with a new reference power cable.
However this week the system was placed back to its usual reference components and allowed to get reacquainted with each other.
So why do I make such a big song and dance about the Wadia's?
It's a very fair question after all it's 'Vintage technology' compared to the latest crop of super dacs right? So why bother at all, considering the current selection of desirable digital to analogue converter specifications are far superior in every aspect of measurable properties.
Just give up lad you know you are on a hiding to nothing right?
All this effort must be nostalgia nothing more , harking back to when having big black heavy boxes was a sign of willy waving and naim like freemason one upmanship
After all you can purchase a quality dac with pre recquiste SINAD of 127dB+ for a very modest price these days compared to these pre cambrian carbon dated behemoths!
Why waste my own time and money on such past masters , I must be slightly skewed due to the number of Wadias in the collection right?
Well strangely No lol.
I know I have mentioned this phrase before butI I am sticking to it, when you hear something that is intrinsically 'correct' then pretty much all the other presentations seem manufactured all be it in some cases exceptionally well.
So what do I mean by this? Is a pretty bold yet ambiguous statement I suspect many will feel.
I can sit here and listen to any genre of music (even jazz lol) and it entices me to explore my music collection deeply even though a lot of the recordings are not that appealing. All of a sudden four plus hours have passed and it's 3am. The system doesn't present any sort if sonic signature. It just merely removes itself from the replay chain leaving music.
Whether you listen at ultra quiet levels it still presents a very natural fluid sound that has layered rich detail BUT doesn't pull you towards that specific aspect. Conversely if you are listening at more classical concert realistic volume levels it's not forward, or grainy in all way. The headroom is genuinely effortless
Then we come to the sense musical timing it is peerless, not even the ultra dacs come this close to an engaging, involving anf all encompassing sound. This is where the sense of correctness comes from I firmly believe.
Tonally it's bang on the money with acres of textural layering and stage depth, speakers utterly disappear leaving you with the single speaker you can't see, but can hear!
Unlike a lot of its more illustrious counterparts it doesn't deliver an artifical 38 foot sound stage, non matter how open or sweet it's been designed that way. Hifi guys will juice their silkies over this, I fully understand its those things you hold critical for you
Now the Wadias roll off at 18Khz by a not insignificant figure of 3dB (logarithmic scale) so it must have a mach darker sound, in stock form yes it does but saying this I looked at three dacs recently (all new models) and some of their selectable filters offered a more significant roll off.
Anyway, my point being I now have one of the most complete sounds I have ever had the pleasure of listening to and it does just that, makes me listen to music totally unhindered by the system
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Bigman80
Grandmaster
The HiFi Bear/Audioaddicts/Bigbottle Owner
Posts: 16,398
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Post by Bigman80 on Dec 26, 2021 16:02:43 GMT
Well after dodging the the sprout mountain (Devils spawn), the traffic into central London yesterday and waves of hung over dog walkers shuffling past the house with forlorn & never again expressions on their faces being dragged by a rampant poddles in search of Suitable watering post today I can finally catch up the blog section as time has slowed sufficient to enable some quality insights. In the last months its been exceptionally busy and personal project time has been limited, however I have spent a good thirty hours with the 15i in the last week. It has undergone some pretty major surgery and new additions to its original factory condition, while all of these were performed in stages and been have to time and bed in. Around 500 hours of solid playing time has been clocked up by Wadia 15i Also during this time two new digital streaming transports have also seen action while being bench tested along with a new reference power cable. However this week the system was placed back to its usual reference components and allowed to get reacquainted with each other. So why do I make such a big song and dance about the Wadia's? It's a very fair question after all it's 'Vintage technology' compared to the latest crop of super dacs right? So why bother at all, considering the current selection of desirable digital to analogue converter specifications are far superior in every aspect of measurable properties. Just give up lad you know you are on a hiding to nothing right? All this effort must be nostalgia nothing more , harking back to when having big black heavy boxes was a sign of willy waving and naim like freemason one upmanship After all you can purchase a quality dac with pre recquiste SINAD of 127dB+ for a very modest price these days compared to these pre cambrian carbon dated behemoths! Why waste my own time and money on such past masters , I must be slightly skewed due to the number of Wadias in the collection right? Well strangely No lol. I know I have mentioned this phrase before butI I am sticking to it, when you hear something that is intrinsically 'correct' then pretty much all the other presentations seem manufactured all be it in some cases exceptionally well. So what do I mean by this? Is a pretty bold yet ambiguous statement I suspect many will feel. I can sit here and listen to any genre of music (even jazz lol) and it entices me to explore my music collection deeply even though a lot of the recordings are not that appealing. All of a sudden four plus hours have passed and it's 3am. The system doesn't present any sort if sonic signature. It just merely removes itself from the replay chain leaving music. Whether you listen at ultra quiet levels it still presents a very natural fluid sound that has layered rich detail BUT doesn't pull you towards that specific aspect. Conversely if you are listening at more classical concert realistic volume levels it's not forward, or grainy in all way. The headroom is genuinely effortless Then we come to the sense musical timing it is peerless, not even the ultra dacs come this close to an engaging, involving anf all encompassing sound. This is where the sense of correctness comes from I firmly believe. Tonally it's bang on the money with acres of textural layering and stage depth, speakers utterly disappear leaving you with the single speaker you can't see, but can hear! Unlike a lot of its more illustrious counterparts it doesn't deliver an artifical 38 foot sound stage, non matter how open or sweet it's been designed that way. Hifi guys will juice their silkies over this, I fully understand its those things you hold critical for you Now the Wadias roll off at 18Khz by a not insignificant figure of 3dB (logarithmic scale) so it must have a mach darker sound, in stock form yes it does but saying this I looked at three dacs recently (all new models) and some of their selectable filters offered a more significant roll off. Anyway, my point being I now have one of the most complete sounds I have ever had the pleasure of listening to and it does just that, makes me listen to music totally unhindered by the system How much would a "Tony'd Wadia" sell for? I know that selling them isn't the Goal here, but when a guy with your resources (and experience) is so profusely enthusiastically, it does trigger a certain Interest.
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Post by sq225917 on Dec 26, 2021 17:05:29 GMT
Let's be honest, -3db at 18khz won't even register on the hearing of any of the regular posters here, myself included.
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Post by gninnam on Dec 26, 2021 19:10:18 GMT
How about 'borrowing' one to try and see what you have discovered?
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Post by antonio on Dec 27, 2021 2:59:08 GMT
Very pleased you're enjoying the Wadia, you've certainly put the hours in updating and modifying. With all that you have said, it is the player I'd most like to hear at the moment, more so than Taiko Extreme.
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Post by misterc on Dec 27, 2021 11:13:36 GMT
I have to be fair here, all the heavy lifting had been performed by Wadia, all I have done is just allowed the dac to breathe by updating the internal components to allow this to happen with modern amplifiers and speakers Currently working on another Wadia dac to bring it up to the same level then going to have a real serious indepth session (zero lube or alcohol lol)
Dave, the Extreme I had in the system for three weeks, it has some positive features it has 3D for start and rather big staging quiet as well. But again like the MU-1 superb hifi no question what so ever, but it stll lacks real involvement, (The psu may have many capacitors but its reallly not that quiet) However it is one of the better ones for sure.
The Pink Faun is the next one my list, not so easy to come by, however give me a month and I will have one, so far its the Roackna Wavedream Net and the Taiko that can actually produce a 3D tactile sound.
Currently working on the Net and its progessing well.
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Post by misterc on Jan 15, 2022 19:05:09 GMT
Thought it was time to update the blog with our various Audio work projects that have happened in the last few months, but due to quite insane work load time has passed me by like it does to us all
A selection of some of the cable orders that have been fabicated and delivered to happy customers below.
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Post by antonio on Jan 16, 2022 1:57:45 GMT
I am going to have to ask, the banana plugs you are using I've never seen before, are they Coherent specified? Also, I will compliment you on the finish on your power cables, I like that silvery/white look, unfortunately they're a little too pricey for the the like of me at present, and you didn't seem to keen the last time I offered to pay £1 per week.
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Post by misterc on Jan 17, 2022 18:26:15 GMT
I am going to have to ask, the banana plugs you are using I've never seen before, are they Coherent specified? Also, I will compliment you on the finish on your power cables, I like that silvery/white look, unfortunately they're a little too pricey for the the like of me at present, and you didn't seem to keen the last time I offered to pay £1 per week. Hello Dave,
The plugs are Furutech and professional lab grade both of whch are stripped back to base material by acid pickling, three power washing stages, then final ultrasonic cleaning before plating with a 6-9 micro coat of the Coherent conductor material that matches that particular cable range. The 'silver finish' is our designed sheilding material we have manufactured to our specification here in the UK along with our our Coherent conductor materials.
Following on here are some equipment refurbishments, diagnostic repairs and upgrades.
Coherent Systems recent Google feedback
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Post by antonio on Jan 17, 2022 21:29:38 GMT
Thank you Tony, very interesting, that really is something different.
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Post by misterc on Jan 22, 2022 19:44:56 GMT
This week have been finishing off a rather special pre amp for a customer, its been on hard core test for 3 days solid, so here is a bit of tech speak for you, in that time the scope have been taking around 250million samples a second ( it can accquire 20 Billion samples a second if you need it (not for ananlogue!) This purely for basic thoughts
In the time this pre was was being measured over 9 hours the total difference between in standard deviation between the two channnel highest and lowest reading with a 2V peak to peak 1Khz sine was 0.000009 of volt, was does that tell?
Well without listening abolsutely sod all, what it does indicate that both channels are incredible stable and exceptionally equal in amplitute over long periods, saying thhat the channel balance and intermodulation distortion will be minute.
Its how figures and data are intepreted so if it sounds bad, it would be amazing even and accurate with reproducing a bad sound across both channels lol
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Post by misterc on Mar 10, 2022 16:52:18 GMT
Well the 15i is well and truly finished now, sounding rather special, it recently totally demoralised a Audio Note Dac 5 signature and is now residing in place of aformentioned piece of equipment, one very happy customer.
A Wadia 25 has now taken up the mantle with some judicious use of the rework station and some nice custom boards along with a sample rate expansion to the incoming data stream, some rather pleasing sounds now eminating from the system with texture and stage depth to absolutely die for, plus a natural rhythmic poise that is amazing addictive. Music making par exellence'
Thought I would try out some new Tad speakers as well.
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Bigman80
Grandmaster
The HiFi Bear/Audioaddicts/Bigbottle Owner
Posts: 16,398
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Post by Bigman80 on Mar 10, 2022 19:12:46 GMT
Well the 15i is well and truly finished now, sounding rather special, it recently totally demoralised a Audio Note Dac 5 signature and is now residing in place of aformentioned piece of equipment, one very happy customer.
A Wadia 25 has now taken up the mantle with some judicious use of the rework station and some nice custom boards along with a sample rate expansion to the incoming data stream, some rather pleasing sounds now eminating from the system with texture and stage depth to absolutely die for, plus a natural rhythmic poise that is amazing addictive. Music making par exellence'
Thought I would try out some new Tad speakers as well.
Speakers look superb. How do they sound?
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Post by antonio on Mar 11, 2022 6:02:30 GMT
Nice work with the Wadia Tony, pleased your customer is happy. Speakers look grand as well, we are fans of TAD's Reference series, but those stand mounters have just gone up in price too much. May I ask what the black bar is behind the speaker.
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Post by misterc on Mar 11, 2022 11:01:00 GMT
Dave, I use both the CR-1 and R-1's at home, here at work its bit tight but the CR-1's do actually work well in the 14' x 24' room. The Tad E-1Tx's are proving to be a real dark horse, they are starting to really open up today and cohesiveness is absolutely there in spades. They have the speed of the ME-1's and the rather silly bass reproduction given the modest cabinet size and its razor sharpe tight and delicious decay on the tom's, piano, Vilolins, Cello's and Strats. Another week and they will be on point I feel.
The black bar is a Creaktiv speaker stop and it makes qute a positive difference to the sound, have used them for many years even at shows
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Post by sq225917 on Mar 11, 2022 13:41:02 GMT
Come on Tony, more pics of disembodied hifi please.
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Post by misterc on Mar 12, 2022 19:36:37 GMT
Come on Tony, more pics of disembodied hifi please. Ok Simon, as you asked nicely so................
A recent Marantz CD94 MK II came in for a common draw issue, so after the correct belt replacement, sled removal and ulttrasonic cleaning, and reassembly plus the sintered oil a tiny drop lol, attention turned to the circuit board particularly the power suppily board area (again very common) so after some careful crud removal and corrision on the link jumper bars (some replaced) this really nice condition player has been given a new lease of life. Next month back for servo drive board overhaul and dac section refresh. The owner was a really nice chap as well had this model 30 years and he had een to three other repair shops before ourselves.
A Lyndorf CD2 player in for some enhacement also, plus a Plinius 101 player with a faulty dac chip so some careful updates and replacement in this players digital section.
Nagra classic psu with the third rail added.
Finially as not to ruffle Jimbo dave power supply update, tis is one of our versions for a 'proper dac' five rails plus a large current NUC 12Vdc supply rail 750va Tx fully screened, dual layer between primary and secondary and trAced to earth, ultra high silicone current eddy band with potting. Sat on a fully gimbled transformer platform. Each rail fully idependant ultra low impedance and with the correct resovior/ smoohting caps mounted directly onto the our own designed dual rairegulation and recification boards. With our own 3D prinited cap support and damping system incorportated. Cost is not $7k lol.
More to come but I have some sales images to process!
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Post by sq225917 on Mar 12, 2022 23:41:55 GMT
Now that's a power supply..
Blue belts eh...
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Post by antonio on Mar 13, 2022 8:28:46 GMT
Dave, I use both the CR-1 and R-1's at home, here at work its bit tight but the CR-1's do actually work well in the 14' x 24' room. The Tad E-1Tx's are proving to be a real dark horse, they are starting to really open up today and cohesiveness is absolutely there in spades. They have the speed of the ME-1's and the rather silly bass reproduction given the modest cabinet size and its razor sharpe tight and delicious decay on the tom's, piano, Vilolins, Cello's and Strats. Another week and they will be on point I feel. The black bar is a Creaktiv speaker stop and it makes qute a positive difference to the sound, have used them for many years even at shows Well we've looked on your site and Creaktiv's and can't find any mention of a 'speaker stop', have they stopped making them? Well done in making Simon (sq225917) drool with photo's of power supplies and blue belts, my page was still wet.
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Post by misterc on Mar 22, 2022 20:38:42 GMT
Been a very busy last 7 days, trying to find time to catch up on your own projets is proving to be somewhat challenging to say the least.
I should have posted ny first effect with our new cnc machine here not in the what I did today sorry, anyway this was yesterday.
Also just putting the finishing touches to a new internal digital filter / clocking circuit looking pretty respectable so quietly pleased with this
It has been three months work on and off of programing / circuit board redraws and corrent transmission lies connetcions. measurments are taken at the circuit board after the filter right on the output of Clock signal to the dac chip @ four times red book sample rate.
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