In the meantime, send your contributions and leftover capacitors to the Russ & Brian defense and family time recovery fund. 😀
X-BoSoZ case finally coming together
So, it's been a while, and I've been getting tires of having "free-range" stereo equiptment playing from the workbench, so I am finally finishing up the case (cage) for my X-BoSoZ.
I am using a Darwin SS and JT attenuator. The wrap on my trafos had somehow started to unravel on me a bit (from being shuffled around the workbench too uch I guess), so I wrapped them in Scotch Super 33 electrical tape. I think they look pretty nice that way actually. Might do that more in the future...
Anyway, I got my brother to do a little CNC work for me for the rear panel. Now I just need to find a few more sources 😉
Still trying to decide on a front panel. Maybe rosewood to match some furniture in the living room...
More to come as I wrap it up.
So, it's been a while, and I've been getting tires of having "free-range" stereo equiptment playing from the workbench, so I am finally finishing up the case (cage) for my X-BoSoZ.
I am using a Darwin SS and JT attenuator. The wrap on my trafos had somehow started to unravel on me a bit (from being shuffled around the workbench too uch I guess), so I wrapped them in Scotch Super 33 electrical tape. I think they look pretty nice that way actually. Might do that more in the future...
Anyway, I got my brother to do a little CNC work for me for the rear panel. Now I just need to find a few more sources 😉
Still trying to decide on a front panel. Maybe rosewood to match some furniture in the living room...
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An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
More to come as I wrap it up.
Low output Gain
Hi
I have one channel working of my T X-BOSOZ but the output gain is low. With or without a volume control in the circuit my amp has gain controls on it and with then all the way up it’s not loud at all.
I would think there would be more output then what I was getting.
Regards,
Dave
Hi
I have one channel working of my T X-BOSOZ but the output gain is low. With or without a volume control in the circuit my amp has gain controls on it and with then all the way up it’s not loud at all.
I would think there would be more output then what I was getting.
Regards,
Dave
Brian,
Do you think your aluminum dividers are thick enough? Why not just go with 1"
Looks great,..I'm jealous. I don't have a brother that's a machinist🙁 Come to think of it, I don't have a brother.
Member
Joined 2002
Thats the same chassis i have except that the rear panel is removed and changed. LOOK's good tho 😀
Thanks!
He did this work on a CNC at work, but actually just bought his own for his house (!).
The case is from Par-Metal. We were actually throwing around the idea of offering pre-machined rear panels to fit their standard chassis sizes (12x3, 16x3, 12x4, 16x4) to go with some of our kits... 😉
He did this work on a CNC at work, but actually just bought his own for his house (!).
The case is from Par-Metal. We were actually throwing around the idea of offering pre-machined rear panels to fit their standard chassis sizes (12x3, 16x3, 12x4, 16x4) to go with some of our kits... 😉
Member
Joined 2002
BrianDonegan said:
Would be another great product to go with your kit's. It would sell for sure.
J'
Does anyone remember what the output/input impedance's of the Twisted BosoZ are? It was probably mentioned somewhere, but I cant find it.
Steen🙂
Steen🙂
Almost finished.
Got a hum in the left channel from the attenuator, but otherwise it is fantastic.
Used remote control, selector, attenuator from Dantimax.
Built the chassis from leftover aluminium.
These tiny details take a lot of time. I must have used 25 hours on just the knobs...
Got a hum in the left channel from the attenuator, but otherwise it is fantastic.
Used remote control, selector, attenuator from Dantimax.
Built the chassis from leftover aluminium.
These tiny details take a lot of time. I must have used 25 hours on just the knobs...
Attachments
Another XBosoz working, cosmetics to be added.
The box is ugly, but amp works fine 🙂
Thanks for Russ, Brian, metalman and of course Nelson for making it possible!
The box is ugly, but amp works fine 🙂
An externally hosted image should be here but it was not working when we last tested it.
Thanks for Russ, Brian, metalman and of course Nelson for making it possible!
What fun, to bring a thread from being buried a bit. 🙂
How are you guys managing connection to earth?
I finally wired this up into a chassis and for the first time actually have wired earth into the circuit and now I get a nifty hum. Of course, I'm also running it with different amps (not my project X-GC still in-progress but a pair of Outlaw 2200's I got cheap). It seems to get worse as things heat up. And it DOES heat up a fair amount, though never ever too hot to touch, just nice and warm.
Tonight I'm going to try removing the connection from ground>earth (chassis will remain earthed) and see if that solves things or if it is in fact something entirely different causing my hum.
It's not loud but it sure is annoying. What's crazy is that it is still obvious that the noise floor in my system is WAY down from where it was, despite the hum. (I'd been running the Outlaws on their single ended inputs off a 100k pot straight off the source, and prior to that, a failing Nakamachi TA-2A). Some really light and quiet classical passages rendered beautifully through it, and could turn around and drown out any hum with full bore orchestra blasting. 🙂 Elgar sure is fun.
C
How are you guys managing connection to earth?
I finally wired this up into a chassis and for the first time actually have wired earth into the circuit and now I get a nifty hum. Of course, I'm also running it with different amps (not my project X-GC still in-progress but a pair of Outlaw 2200's I got cheap). It seems to get worse as things heat up. And it DOES heat up a fair amount, though never ever too hot to touch, just nice and warm.
Tonight I'm going to try removing the connection from ground>earth (chassis will remain earthed) and see if that solves things or if it is in fact something entirely different causing my hum.
It's not loud but it sure is annoying. What's crazy is that it is still obvious that the noise floor in my system is WAY down from where it was, despite the hum. (I'd been running the Outlaws on their single ended inputs off a 100k pot straight off the source, and prior to that, a failing Nakamachi TA-2A). Some really light and quiet classical passages rendered beautifully through it, and could turn around and drown out any hum with full bore orchestra blasting. 🙂 Elgar sure is fun.
C
Hi C,
Mains earth and signal GND should not be directly connected. I do not connect them at all.
If you do want to connect them I would recommend using two diodes arranged in parallel with opposite polarities. This should block most small signal hum. Any voltage going across the diodes would have to be more then the forward voltage drop of the diodes.
Cheers!
Russ
Mains earth and signal GND should not be directly connected. I do not connect them at all.
If you do want to connect them I would recommend using two diodes arranged in parallel with opposite polarities. This should block most small signal hum. Any voltage going across the diodes would have to be more then the forward voltage drop of the diodes.
Cheers!
Russ
Hmm, ok then. 🙂 That go for power ground to earth as well, as I think PG and SG are already connected? Just earth the chassis and leave it at that.
Guess that answers the "why" quite simply. 🙂 Could have saved myself a bit of work!
I still can't get over how clearly the music played through a much louder hum (note, my ambient noise is ~62dB and I often have the sound system output such that it doesn't register on my SPL meter anyhow... the hum was below this threshhold and the music even farther below).
Am going to grab a Darwin soon as the Opus is ready, since I want one (or two?!) of those also and prefer to consolidate shipping. Now, if you'd offer a phono stage I'd be set. 😉 I may actually put the DAC(s), source selector, and probably eventually a phono stage in a different box from the preamp. We'll see. I tend to juggle equipment a lot and hate losing one thing when I gain another. 🙂
C
Guess that answers the "why" quite simply. 🙂 Could have saved myself a bit of work!
I still can't get over how clearly the music played through a much louder hum (note, my ambient noise is ~62dB and I often have the sound system output such that it doesn't register on my SPL meter anyhow... the hum was below this threshhold and the music even farther below).
Am going to grab a Darwin soon as the Opus is ready, since I want one (or two?!) of those also and prefer to consolidate shipping. Now, if you'd offer a phono stage I'd be set. 😉 I may actually put the DAC(s), source selector, and probably eventually a phono stage in a different box from the preamp. We'll see. I tend to juggle equipment a lot and hate losing one thing when I gain another. 🙂
C
cjd said:
Yes it goes for PG too, and yes in this case they are really one and the same.
Phono stage will come someday. 🙂
Opus PCBs will go to manufacturer this week. 🙂
We will probably take pre-orders soon.
I am using new CAD software now (DipTrace) and still learning some of the ins and outs. Very very good software. Much better than eagle, and much more affordable for a real production version.
Cheers!
Russ
Where the heck do you guys find them?! Especially those nice wooden ones that would go nicely with a wood facade.
