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Post by firebottle on Jun 11, 2020 15:39:00 GMT
Bigbottle finalsBit of a tit for tat going on with El Capitain's and my Bigbottle, (Put on a Cupid Stunt voice).. all in the best possible taste.
The transformer has been moved to a separate box, in fact I have used two transformers, a 9-0-9 toroid for the heater supply and an EI transformer for the HT.
Super duper big output caps have been fitted plus a power up mute board.
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Bigman80
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Post by Bigman80 on Jun 11, 2020 16:17:42 GMT
Hahaha, a bit of tit for tat lol Let's lay the blame squarely at bigbird He introduced these red monsters into our lives lol But yes @reffc is to blame for the EI transformer discovery and the MultiFET PCB. However, whats a dramatic improvement! Looks good Al, and I'm happy that you decided to stump up for the performance improvement. I imagine when tour valve arrives that you be more than impressed....then we can hear your thoughts on it. |
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Post by electronumpty on Jun 11, 2020 17:32:51 GMT
You've gone dual mono on the transformers then!
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Post by firebottle on Jun 11, 2020 19:22:28 GMT
Well not really dual mono, just two transformers,  |
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Post by electronumpty on Jun 11, 2020 20:10:08 GMT
Well not really dual mono, just two transformers, Well that's good enuff for me to call it so squire, anyway I was looking forward to seeing Olli disappear in a puff of envy!  |
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Bigman80
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Post by Bigman80 on Jun 11, 2020 21:12:35 GMT
Well not really dual mono, just two transformers, Well that's good enuff for me to call it so squire, anyway I was looking forward to seeing Olli disappear in a puff of envy! No puff of envy required... My transformer is isolated between windings, as is yours, however both of mine are on a EI transformer 😉 |
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Post by electronumpty on Jun 11, 2020 22:49:06 GMT
What does EI stand for btw?
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Bigman80
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Post by Bigman80 on Jun 11, 2020 22:57:01 GMT
What does EI stand for btw? Its the shape of the metal laminates. One is shaped like an E one is shaped like an I |
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Post by electronumpty on Jun 11, 2020 23:11:01 GMT
Ok cool thanks.
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Post by firebottle on Jun 13, 2020 10:42:49 GMT
Just finished some power up/down muting boards. They are set for 7.6V operation for the Bigbottle but can be altered for 6.3 or 12V operation as need be.  |
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Deleted
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Post by Deleted on Jun 21, 2020 13:50:56 GMT
These are well worth fitting...they do a great job of stuffing a big eider-down pillow over the "whump!" that otherwise can eminated from the speakers at shut-off on some.
Damn....looks like I may have to join the "who's got the biggest output coupling caps" war! Gonna need a bigger case.............
My Tele's turned up Friday after a 6 week journey from Turkey so as soon as my PCB is back in it's proper place, I'll be fitting those.
Anyone wondering if they can create a true switchable MM/MC can have that question answered too....did it the other day and could have kicked myself as the answer was dead easy and was staring us all in the face. Install two additional "off-On" switches on the rear or front (make sure they're low current rated to avoid coupling too much noise). When the switch is normally out of circuit the connection across the load sockets isn't connected and the phonostage has nominally 150pF cap loading plus IC load from the cartridge for MM cartridges. When the switch is "on" the load resistors are then in circuit so when you switch the the MC stage, they kick in for your MC loading.
I've fitted some 330 Ohm 1% quarter watt metal foils to mine so that I can swap between a large number of different MC carts. A 110 Ohm would do almost as well unless your MC carts have self impedances of 15 ohms or more.
Job almost jobbed!
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Deleted
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Post by Deleted on Jun 21, 2020 15:02:43 GMT
May need that bigger case...these caps'll do the job!  |
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Bigman80
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Post by Bigman80 on Jun 21, 2020 15:18:25 GMT
May need that bigger case...these caps'll do the job! Crikey!!! Lol |
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Post by Deleted on Jun 21, 2020 15:37:41 GMT
I think that they might be sub station shunt reactor capacitors....not something you'd want to get too close to!
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Post by firebottle on Jun 21, 2020 18:43:08 GMT
OMG! I don't like the way Americans litter their daily existence with such speech but as I never use such expressions normally it fits in this case.
I am listening to vinyl, particularly a favourite LP, Toy by Yello. I haven't heard it so recently but now the Bigbottle3 phono stage has been in use in it's updated state with all the latest upgrades and has had some time to bed in things are sublime.
There is scale, depth, detail, finesse, impact, clarity and such verve as I haven't experienced before. I am hearing more deeply into the recording and absolutely loving the experience.
It's as if you are hearing what it 'should' sound like with all the intricacies of Yello's amazing production values.
Pig in Sh#t comes to mind..
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Deleted
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Post by Deleted on Jun 21, 2020 18:57:17 GMT
Sounds good Alan. Looking forward to mine returning so that I can experience the updates. Trouble is I have very little time to listen at the minute!
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Post by jimbo on Jun 21, 2020 19:13:54 GMT
Fantastic Alan and a fav of mine. I can imagine what your hearing knowing your system and revealing some more nuances from the superb Yello production must be great to hear.
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Post by electronumpty on Jun 21, 2020 20:27:30 GMT
Sounds great Alan, can't wait to get the FET boards through to stick them in.
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Bigman80
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Post by Bigman80 on Jun 22, 2020 9:06:08 GMT
Sounds great Alan, can't wait to get the FET boards through to stick them in. Shoulld be there today/tomorrow. I posted on Friday. Use minimal heat and work REALLY carefully. They are proving to be tricky little bastards to fit. |
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Post by electronumpty on Jun 22, 2020 9:22:47 GMT
Cool look forward to it. Which resistors need taking out?
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Bigman80
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Post by Bigman80 on Jun 22, 2020 9:25:28 GMT
Cool look forward to it. Which resistors need taking out? R7L&R Replace with a wire link and remove original FET |
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Post by electronumpty on Jun 22, 2020 12:13:46 GMT
Cool look forward to it. Which resistors need taking out? R7L&R Replace with a wire link and remove original FET Thanks, which way round do you fit the FET boards to each channel? |
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Bigman80
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Post by Bigman80 on Jun 22, 2020 12:40:05 GMT
R7L&R Replace with a wire link and remove original FET Thanks, which way round do you fit the FET boards to each channel? Ill post a pic |
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Bigman80
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Post by Bigman80 on Jun 22, 2020 12:57:08 GMT
Both face the same way as shown here.  |
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Post by firebottle on Jun 28, 2020 16:07:43 GMT
A hybrid Paradise phono stage, is it possible? Of course it is ... it's me talking.  It is very much a lash up at the moment but it's a perfect fit. What do you need on the output of the RIAA network? A very high impedance buffer, what is the characteristic of a valve grid? A very high impedance, couldn't be more appropriate. Plus it has removed the 'dryness' of the sound going through the input fet on the Calvin buffers and added more air to the presentation. Win win in my book. A HYBRID PARADISE, yay! |
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Post by rexton on Jun 28, 2020 16:33:04 GMT
Well I never thought I'd see a valve in a Paradise.
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Bigman80
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Post by Bigman80 on Jun 28, 2020 16:35:52 GMT
A hybrid Paradise phono stage, is it possible? Of course it is ... it's me talking. View AttachmentIt is very much a lash up at the moment but it's a perfect fit. What do you need on the output of the RIAA network? A very high impedance buffer, what is the characteristic of a valve grid? A very high impedance, couldn't be more appropriate. Plus it has removed the 'dryness' of the sound going through the input fet on the Calvin buffers and added more air to the presentation. Win win in my book. A HYBRID PARADISE, yay! This is why I like you Alan, you do things most people would even imagine lol. Looking forward to hearing this. Genuinely love the madness. |
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Bigman80
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Post by Bigman80 on Jun 28, 2020 17:02:17 GMT
Just contemplating a 4 tin build for my Paradise. Not just any tins either....these are posh shortbread tins all the way from Edinburgh! Lol   |
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Post by firebottle on Jun 28, 2020 17:09:57 GMT
Ha ha, that's class. Pity they aren't a bit stronger to resist the flexing.
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Post by firebottle on Jun 28, 2020 17:12:38 GMT
Well I never thought I'd see a valve in a Paradise. Never say never. It is a collaboration of the best of both worlds, that's why I love hybrid designs. Choosing the right valve you don't even need a separate high voltage supply, just a DC heater supply. |
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