Bigman80
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Post by Bigman80 on Oct 13, 2021 20:26:45 GMT
If it performs as expected, then subject to audition and it being available in black, consider me as your 1st buyer of the BBu. For you John...I'll see what I can do. The casework is yet to be identified, so Black is a possibility |
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Bigman80
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Post by Bigman80 on Oct 13, 2021 20:27:25 GMT
This is more like it. Looks like a few pennies will be spent over Xmas. Gold plated, pure copper valve sockets.....just to give you an idea of what's going on 🤣 We must be bonkers |
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Post by rexton on Oct 13, 2021 20:32:10 GMT
This is more like it. Looks like a few pennies will be spent over Xmas. Gold plated, pure copper valve sockets.....just to give you an idea of what's going on 🤣 We must be bonkers No I disagree. I sounds like you've really gone into incredible detail. This is the sort of audio I look forward to assessing. |
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Bigman80
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Post by Bigman80 on Oct 13, 2021 20:58:45 GMT
Gold plated, pure copper valve sockets.....just to give you an idea of what's going on 🤣 We must be bonkers No I disagree. I sounds like you've really gone into incredible detail. This is the sort of audio I look forward to assessing. We have. The motto on this one was "performance over price" We had to get Craig (PCB designer) to manually create the footprint for the 7 pin socket as one didn't previously exist. We've got some rather tasty USSR polystyrene caps that are matched already and were using some made to measure film and foil coupling caps. I've saved 30 of the best JFETS ive heard for the first few builds. They now obsolete, so there won't be any more, so once they are gone, they are gone. Gold plated 7N OCC Copper for the now mega small lengths of hookup wire we need. Loading is now done by jumpers on the PCB. No external sockets or wiring to pick up RF We're going to use two transformers, one for each side and we're going to mount them in such a way as to negate the magnetic field issues. I have 10 pairs of matched Russian military valves, all 'OS' versions. 2oz copper and 2mm thick PCBs.... As you can see, we've gone a bit OTT |
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optical
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Post by optical on Oct 14, 2021 7:09:51 GMT
No I disagree. I sounds like you've really gone into incredible detail. This is the sort of audio I look forward to assessing. We have. The motto on this one was "performance over price" We had to get Craig (PCB designer) to manually create the footprint for the 7 pin socket as one didn't previously exist. We've got some rather tasty USSR polystyrene caps that are matched already and were using some made to measure film and foil coupling caps. I've saved 30 of the best JFETS ive heard for the first few builds. They now obsolete, so there won't be any more, so once they are gone, they are gone. Gold plated 7N OCC Copper for the now mega small lengths of hookup wire we need. Loading is now done by jumpers on the PCB. No external sockets or wiring to pick up RF We're going to use two transformers, one for each side and we're going to mount them in such a way as to negate the magnetic field issues. I have 10 pairs of matched Russian military valves, all 'OS' versions. 2oz copper and 2mm thick PCBs.... As you can see, we've gone a bit OTT I've just bought some shares in a copper mine and an OCC manufacturing plant . . . . so you crack on lads. |
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Post by firebottle on Oct 14, 2021 7:11:47 GMT
Also some interesting hybrid implementations in the circuitry..
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Bigman80
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Post by Bigman80 on Oct 14, 2021 7:12:05 GMT
We have. The motto on this one was "performance over price" We had to get Craig (PCB designer) to manually create the footprint for the 7 pin socket as one didn't previously exist. We've got some rather tasty USSR polystyrene caps that are matched already and were using some made to measure film and foil coupling caps. I've saved 30 of the best JFETS ive heard for the first few builds. They now obsolete, so there won't be any more, so once they are gone, they are gone. Gold plated 7N OCC Copper for the now mega small lengths of hookup wire we need. Loading is now done by jumpers on the PCB. No external sockets or wiring to pick up RF We're going to use two transformers, one for each side and we're going to mount them in such a way as to negate the magnetic field issues. I have 10 pairs of matched Russian military valves, all 'OS' versions. 2oz copper and 2mm thick PCBs.... As you can see, we've gone a bit OTT I've just bought some shares in a copper mine and an OCC manufacturing plant . . . . so you crack on lads.  |
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Bigman80
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Post by Bigman80 on Oct 14, 2021 7:16:32 GMT
Also some interesting hybrid implementations in the circuitry.. Yes, feel free to disclose some detail, Al....although not too much, as you never know who may be watching this thread  |
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Post by firebottle on Oct 14, 2021 11:20:54 GMT
OK, the first stage is the unique 'triple stack' that gives such stellar MC performance but with an extra enhancement for the BBU. No further details as this is the secret sauce of the Bigbottle designs.
An active load and hybrid active regulation are now included along with really low ESR supply capacitors.
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Post by rexton on Oct 14, 2021 18:04:58 GMT
OK, the first stage is the unique 'triple stack' that gives such stellar MC performance but with an extra enhancement for the BBU. No further details as this is the secret sauce of the Bigbottle designs. An active load and hybrid active regulation are now included along with really low ESR supply capacitors. Alan,
Are these variations of what you did in my Croft pre-amp when you modded that? I seem to remember talking to you about this and you mentioning something similar? There is a very good reason for asking.
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Post by firebottle on Oct 14, 2021 19:27:20 GMT
The mods on your Croft line stage are a simpler part of the approach as it is only a simple gain/output stage.
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Post by rexton on Oct 14, 2021 20:27:02 GMT
just postulating if your mods give a "house sound", yeah know,a specific tone or presentation to the soundstage !?! Just my musings.
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Post by firebottle on Oct 15, 2021 6:45:40 GMT
I don't think so Andy as the hybrid (solid state) part is used to enhance the performance of the thermionic (valve) part.
The SS is acting more as a buffer than anything else, though that's not the whole story.
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Post by rexton on Oct 15, 2021 7:30:44 GMT
Alan, thanks. I was just wondering if any traits of the Croft could or may be heard with your new design, or vice/versa. It's an interesting prospect but as you say, probably not due to the radically differenty design you've plonked in their.
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Post by lurch on Oct 16, 2021 17:48:25 GMT
If it performs as expected, then subject to audition and it being available in black, consider me as your 1st buyer of the BBu. For you John...I'll see what I can do. The casework is yet to be identified, so Black is a possibility Good. Now get your bloody finger out. I've got 2/3 - 3/4 of the necessary ££s here waiting, and I've still got my Icons to sell. You know what I'm like when I have money to play with, it tends to burn large holes in my pocket if it sits there too long. |
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Bigman80
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Post by Bigman80 on Oct 16, 2021 17:51:50 GMT
For you John...I'll see what I can do. The casework is yet to be identified, so Black is a possibility Good. Now get your bloody finger out. I've got 2/3 - 3/4 of the necessary ££s here waiting, and I've still got my Icons to sell. You know what I'm like when I have money to play with, it tends to burn large holes in my pocket if it sits there too long. Hahaha, I'm happy to hold it 🤣 PCBs aren't here yet mate...stay patient! |
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Post by lurch on Oct 16, 2021 17:57:12 GMT
What loading values have you settled on for the jumpers? Also will it have/can it be fitted with inputs for 2 arms?
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Bigman80
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Post by Bigman80 on Oct 16, 2021 18:09:11 GMT
What loading values have you settled on for the jumpers? Also will it have/can it be fitted with inputs for 2 arms? Can't remember the loading values off the top of my head, but 2 inputs isn't an issue. |
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Post by antonio on Oct 17, 2021 4:14:54 GMT
For you John...I'll see what I can do. The casework is yet to be identified, so Black is a possibility Good. Now get your bloody finger out. I've got 2/3 - 3/4 of the necessary ££s here waiting, and I've still got my Icons to sell. You know what I'm like when I have money to play with, it tends to burn large holes in my pocket if it sits there too long. Put a leash on him somebody  |
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Post by firebottle on Oct 17, 2021 7:31:12 GMT
Loading values 100,150,220,470 ohms.
47K standard for MM.
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Bigman80
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Post by Bigman80 on Oct 19, 2021 10:56:47 GMT
GOODIES!!!!  |
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Post by electronumpty on Oct 19, 2021 13:05:22 GMT
Chokes!
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Post by gninnam on Oct 19, 2021 18:23:09 GMT
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Post by rexton on Oct 19, 2021 19:23:50 GMT
Splutters! Into life eventually.
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Post by lurch on Oct 20, 2021 3:29:16 GMT
Then farts and follows through.
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Deleted
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Post by Deleted on Oct 20, 2021 18:09:54 GMT
“Nurse!”
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Post by sq225917 on Oct 20, 2021 18:46:32 GMT
Baby chokes, or really big boxes?
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Bigman80
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Post by Bigman80 on Oct 20, 2021 18:50:08 GMT
Baby chokes, or really big boxes? Baby chokes and big boxes. |
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Bigman80
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Post by Bigman80 on Oct 22, 2021 13:20:40 GMT
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Post by electronumpty on Oct 22, 2021 16:44:06 GMT
Are these testers or final versions?
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