I forgot to share with moamps on the sound part.
Most of my parts used in the amps are savaged from the local scrap yard. The system which I have is on the lower end. I played them on a Toshiba DVD/CD player with my 25 years old German made acoustic suspension speakers. With this setup, the sound is superb, and vocal is silky smooth and not at all jarring even when the volume is quite high. The songs which I used in trying out the sound are Norah Jone's "Come Away With Me", Eva Cassidy's "What a wonderful world" and Jim Tomlinson's album "So Nice".
Regards
Tony
Most of my parts used in the amps are savaged from the local scrap yard. The system which I have is on the lower end. I played them on a Toshiba DVD/CD player with my 25 years old German made acoustic suspension speakers. With this setup, the sound is superb, and vocal is silky smooth and not at all jarring even when the volume is quite high. The songs which I used in trying out the sound are Norah Jone's "Come Away With Me", Eva Cassidy's "What a wonderful world" and Jim Tomlinson's album "So Nice".
Regards
Tony
What would I give for a local scrapyard like that! 🙁
While I am a big fan of Norah Jones and Eva Cassidy, a better test is provided by the likes of Natalie Merchant who's voice will reveal the slightest distortion in any system! 😱
Hi Nuuk,
I would like my GC included in you DD GC gallery. How can I send you the information?
Thanks and regards,
Tony
I would like my GC included in you DD GC gallery. How can I send you the information?
Thanks and regards,
Tony
tonywong said:
Actually, that has given me a good idea!
As soon as I can I will establish a Gallery on:
"The Tube Gainclone for DIY Buffs" members.ozemail.com.au/~lisaras
We already have some photos posted, so I can get started. I have Mr. Allen Wright arriving here this weekend and for some days will be fully engaged, but soon after that...
Let me know about other candidates... also feel free to supply a caption or short article to go with the pics. Email them to me directly rather than posts here: joe@vacuumstate.com
Joe R.
Hi Tony, choose up to four of your best pictures, resize them to a maximum of around 500-600 pixels width and then send them to me with a brief description of the project to be included in the gallery.
To contact me plase use the contact form at Decibel Dungeon
That of course goes for anyone else who wants to go in the gallery.
Nuuk said:
Did have a look at DD's Gallery, hadn't seen it before. Some very nice work. Very nice indeed!
IF I go ahead with a gallery as well, it will be more limited to buffered gainclones... that means primarily tube frontends but also promoting the principle that a good buffer is a good idea. So fets could qualify... but IC? Maybe not. Gotta draw the line somewhere.
And then I would also enclude a link to DD's Gallery as well. Gainclones are Gainclones!
Joe R.
Thanks Joe and I will put in a reciprocal link on DD.
Now, I can feel another debate coming on so I'm going to say that I also believe 'Gainclones are Gainclones!'
Sure, we are going to see many variations, inverted, non-inverted, non-buffered, buffered (with tubes, FETs, ICs or even discrete) and who know what else.
But the heart of the amp is still an integrated circuit on a chip and the rest of the circuit is just a means of (hopefully) improving the sound quality. So I don't see any reason to differentiate between them! 😱
My tubebuffered gainclone part X
Hi!🙂
I`ve done some work to my buffer.
After the last tube were killed i started measuring the bias, etc.......... and 😕 the measurements were odd. It seems like everything were floating.
So I sat down studying (reading about tubes) and I got more confused. Where is my reference to ground? How can the cathode be positive in reference to ground when it has -42 volt on it...................
I`m a newbee so what do I understand? So I thought I build something I do understand.
I arranged the powersupply to a voltage doubler. This gave me 84 v on anode. Then I put the 10 k resistor on cathode to ground.
I also put a 1m resistor from grid to ground.
My tubesupplyer adviced me to use an ecc82 in this circuit rather than 6922 and he knows his stuff better than I do, so I took his advice.
So the result:
Everything is no measuing fine with the cathode at 4.5V in reference to ground.
The hum I had with the cd-player connected is almost gone. I can still hear a little bit of 120hz (because of the voltage doubler) hum and some radiostations (wooden enclosure) when I put my ear close to the speaker. It`s not audioble a meter away.
So🙂 🙂
And it`s playing beautiful..............
I`m still going to build a new buffer with double powersupply, but at the moment it has no rush....
Have a nice weekend everyone!🙂
Tor Martin🙂
Hi!🙂
I`ve done some work to my buffer.
After the last tube were killed i started measuring the bias, etc.......... and 😕 the measurements were odd. It seems like everything were floating.
So I sat down studying (reading about tubes) and I got more confused. Where is my reference to ground? How can the cathode be positive in reference to ground when it has -42 volt on it...................
I`m a newbee so what do I understand? So I thought I build something I do understand.
I arranged the powersupply to a voltage doubler. This gave me 84 v on anode. Then I put the 10 k resistor on cathode to ground.
I also put a 1m resistor from grid to ground.
My tubesupplyer adviced me to use an ecc82 in this circuit rather than 6922 and he knows his stuff better than I do, so I took his advice.
So the result:
Everything is no measuing fine with the cathode at 4.5V in reference to ground.
The hum I had with the cd-player connected is almost gone. I can still hear a little bit of 120hz (because of the voltage doubler) hum and some radiostations (wooden enclosure) when I put my ear close to the speaker. It`s not audioble a meter away.
So🙂 🙂
And it`s playing beautiful..............
I`m still going to build a new buffer with double powersupply, but at the moment it has no rush....
Have a nice weekend everyone!🙂
Tor Martin🙂
Member
Joined 2002
Good Job Congrat's.. Now you can post some pictures.. i Home soon i can start this tube project..
Hi,
What you did is turn a bipolar supply CF into a generic CF.
Could it be you forgot to ground somewhere on the PS?
It sure looked like it from day one to me whuch is why the tubes went south and there was the hum problem...
Take a good look at this page of theory on CFs.
TUBECAD.
BTW, voltage doublers aren't exactly top of the bill for audio use.
Cheers,😉
What you did is turn a bipolar supply CF into a generic CF.
Could it be you forgot to ground somewhere on the PS?
It sure looked like it from day one to me whuch is why the tubes went south and there was the hum problem...
Take a good look at this page of theory on CFs.
TUBECAD.
BTW, voltage doublers aren't exactly top of the bill for audio use.
Cheers,😉
JasonL said:
Hi!
I`ll have to borrow a digital camera first, then I`ll post some pictures. But got to warn you: At the moment, after a lot of experimenting, the inside looks like a mess. I`m thinking of it as a prototype and I`ll have to clean things up.
fdgrove:
Thanks for the link. I`ll have some interresting reading. I trippel checked the groundings on the buffer, but couldn`t find any thing wrong, not at the caps grounding. But I might have missed something, or rather I must have missed something because everybody else got it working
I`ll try both ways when I build a new buffer.
I belive you that voltage doubler are not "High End" power supply, but at the moment I`m enjoying it and the sound is good!
Thanks for advice!🙂
Tor Martin
Hi,
Please do.
In the mean time I notice some dilemma here.
The whole idea of a buffered GCs can be taken much further but if I present ideas I'd be stepping on commercial interest toes so I 'd rather refrain for the time being...
It's hard to draw the line, can a moderator help out here?
TIA, 😉
Please do.
In the mean time I notice some dilemma here.
The whole idea of a buffered GCs can be taken much further but if I present ideas I'd be stepping on commercial interest toes so I 'd rather refrain for the time being...
It's hard to draw the line, can a moderator help out here?
TIA, 😉
Re: My tubebuffered gainclone part X
Hi Tor,
With 84 volts on the anode, you might want to try a cathode resistor in the 1.5k to 2k range. This would give a bias of 1 to 1.5 volts(guessing), and would make your tube a happier camper, with less distortion. A 4.5 volt bias @ 84 volts is going to put you in a nonlinear region of the tube's curve.
Glad to hear that you've got it up and making music(the most important part).
Tor M said:
Hi Tor,
With 84 volts on the anode, you might want to try a cathode resistor in the 1.5k to 2k range. This would give a bias of 1 to 1.5 volts(guessing), and would make your tube a happier camper, with less distortion. A 4.5 volt bias @ 84 volts is going to put you in a nonlinear region of the tube's curve.
Glad to hear that you've got it up and making music(the most important part).
The whole idea of a buffered GCs can be taken much further but if I present ideas I'd be stepping on commercial interest toes so I 'd rather refrain for the time being...
Hi Frank,
I do not see how you would be stepping on anyones toes. Just because someone does something in a commercial product does not prevent you from doing something similar.
I don't think you are blatantly copying anything so why not share with us technically challenged
😉
I have seen three buffered versions of GC's so far and am looking forward to yours.
Andrew
Hi Frank,
I do not see how you would be stepping on anyones toes. Just because someone does something in a commercial product does not prevent you from doing something similar.
I don't think you are blatantly copying anything so why not share with us technically challenged
😉
I have seen three buffered versions of GC's so far and am looking forward to yours.
Andrew
Hi,
Just don't ask me to reveal sources...unless in private, and then some.
I have no intentions whatsoever to do anything commercial regarding GCs...but I can surely show better CFS...
Thing is should I or should I not show possiblities?
Hence, shall I tell the forum what I think of it or not? And when I do, how will it reflect on others who have a commercial interest?
I hate this...😉
P.S. Why do people post here saying, oh..., but in the future we'll have a more advanced circuit available..knowing very well that this is a DIY forum?
Do I kill them by presenting such circuit or do I just shoot myself in the foot? I wonder...
Cheers,😉
Just don't ask me to reveal sources...unless in private, and then some.
I have no intentions whatsoever to do anything commercial regarding GCs...but I can surely show better CFS...
Thing is should I or should I not show possiblities?
Hence, shall I tell the forum what I think of it or not? And when I do, how will it reflect on others who have a commercial interest?
I hate this...😉
P.S. Why do people post here saying, oh..., but in the future we'll have a more advanced circuit available..knowing very well that this is a DIY forum?
Do I kill them by presenting such circuit or do I just shoot myself in the foot? I wonder...
Cheers,😉
Just don't ask me to reveal sources...unless in private, and then some.
>I would not, private or otherwise.
I have no intentions whatsoever to do anything commercial regarding GCs...but I can surely show better CFS...
Thing is should I or should I not show possiblities?
>Why not? We all can learn from it.
Hence, shall I tell the forum what I think of it or not? And when I do, how will it reflect on others who have a commercial interest?
Nothing wrong with having an opinion, neither is there any reason to apologize for your knowledge. I am sure those that have commercial products have done things the way they have for a reason, usually based on sound engineering, but, that does not mean there is only one way to accomplish a task. Some take the high road and others the low but they all get to their destination. Remember too that a person here who is commercial has stated that the circuit as presented here is not the same as that used in the commercial version.
I hate this...
There really is no reason to.
P.S. Why do people post here saying, oh..., but in the future we'll have a more advanced circuit available..knowing very well that this is a DIY forum?
Do I kill them by presenting such circuit or do I just shoot myself in the foot? I wonder...
I take this forum as the name implies to be D.I.Y.
Why can't we be inovative at the same time?
Cheers,
Andrew
>I would not, private or otherwise.
I have no intentions whatsoever to do anything commercial regarding GCs...but I can surely show better CFS...
Thing is should I or should I not show possiblities?
>Why not? We all can learn from it.
Hence, shall I tell the forum what I think of it or not? And when I do, how will it reflect on others who have a commercial interest?
Nothing wrong with having an opinion, neither is there any reason to apologize for your knowledge. I am sure those that have commercial products have done things the way they have for a reason, usually based on sound engineering, but, that does not mean there is only one way to accomplish a task. Some take the high road and others the low but they all get to their destination. Remember too that a person here who is commercial has stated that the circuit as presented here is not the same as that used in the commercial version.
I hate this...
There really is no reason to.
P.S. Why do people post here saying, oh..., but in the future we'll have a more advanced circuit available..knowing very well that this is a DIY forum?
Do I kill them by presenting such circuit or do I just shoot myself in the foot? I wonder...
I take this forum as the name implies to be D.I.Y.
Why can't we be inovative at the same time?
Cheers,
Andrew
Member
Joined 2002
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