john curl said:
This might have been covered already, but why not simply scale the output resistor for volume control ?
Maybe you dont want to have the output imedance shifting with level settings? But atleast it would remain fixed for each step.
This Blowtorch thread has been one of the most exciting ones😉 . Made some of us moderated, temporarily banned or banned forever.
Made some of us (me) to reassess their attitude and learn.
Someone here having real experience with the Blowtorch? Unfortunately I have active crossover system and cannot assess this approach.
Made some of us (me) to reassess their attitude and learn.
Someone here having real experience with the Blowtorch? Unfortunately I have active crossover system and cannot assess this approach.
Hello, all
Thread bumping out a cross way ??? Please count me in ! Bob Crump used a special resistors arrangement on the switched pot, one shunting output to input, and the other one going from mid-point to ground... Both Vishays...
He told me that very little time before his death, so I can little comment on... Sorry for ! As John Curl does, I can only show a direction, no more...
Jbaudiophile
Thread bumping out a cross way ??? Please count me in ! Bob Crump used a special resistors arrangement on the switched pot, one shunting output to input, and the other one going from mid-point to ground... Both Vishays...
He told me that very little time before his death, so I can little comment on... Sorry for ! As John Curl does, I can only show a direction, no more...
Jbaudiophile
Blowtorch Chassis
That chassis is CNC machined from a billet. If you look carefully, you can see the marks left by the endmill. I have a metal machine shop and have occasionally had to make similar structures, so those marks are familair to me. In fact, I was considering doing exactly the same sort of thing for a preamp design I am planning. The alternative would be to heliarc weld aluminum plate together and machine finish to remove any weld marks.
BTW, my previous big project was a plans-built, high performance aircraft. See www.seqair.com, if you are interested.
JCM
That chassis is CNC machined from a billet. If you look carefully, you can see the marks left by the endmill. I have a metal machine shop and have occasionally had to make similar structures, so those marks are familair to me. In fact, I was considering doing exactly the same sort of thing for a preamp design I am planning. The alternative would be to heliarc weld aluminum plate together and machine finish to remove any weld marks.
BTW, my previous big project was a plans-built, high performance aircraft. See www.seqair.com, if you are interested.
JCM
Hello, Pavel,
You are evidently right about moderation and moderators... I have been under it 2 years long, and I don't expect it to change But I still read most threads, even if I CAN'T ANSWER some... And years I learn a lot from your contributions all... And I can drop a line directly to some of you...
This FORCED silence was called "ANASTASIE" here during WWII... Bah !
About the Blowtorch : John Curl is an honest guy, and tells secrets, I can assure you all... BUT he uses sentences like "usually I..", "you can trust what happened..."... He is just NOT lying, but referng to past experience that has NO connection to the up-to-date Blowtorch... Depends on what a Forumer is targeting for himself, no ??? And the best is to come : lots of engineers around ready to share experiments and experience ! But I salute you John !
All the best, Pavel,
Still enjoying your own contributions !!
Jbaudiophile
You are evidently right about moderation and moderators... I have been under it 2 years long, and I don't expect it to change But I still read most threads, even if I CAN'T ANSWER some... And years I learn a lot from your contributions all... And I can drop a line directly to some of you...
This FORCED silence was called "ANASTASIE" here during WWII... Bah !
About the Blowtorch : John Curl is an honest guy, and tells secrets, I can assure you all... BUT he uses sentences like "usually I..", "you can trust what happened..."... He is just NOT lying, but referng to past experience that has NO connection to the up-to-date Blowtorch... Depends on what a Forumer is targeting for himself, no ??? And the best is to come : lots of engineers around ready to share experiments and experience ! But I salute you John !
All the best, Pavel,
Still enjoying your own contributions !!
Jbaudiophile
Hello Jean-Bernard,
I have got something that I would call "overview" 😉 , and resigned to often and flame posting.
Anyway, I have had quite nice experience with a new power amp based on Ian Hegglun D2S idea - maybe later 😉 .
Regards,
Pavel
I have got something that I would call "overview" 😉 , and resigned to often and flame posting.
Anyway, I have had quite nice experience with a new power amp based on Ian Hegglun D2S idea - maybe later 😉 .
Regards,
Pavel
Hi jbaudiophile,
-Chris
You are not in any way silenced. I passed this post as other moderators have passed many others of yours. People who are willing to abide by the rules never have any fear of banning or moderation.
-Chris
I don't know what the question is. I lost this thread long ago, and it is interesting that it can return so easily.
The CTC preamp is now being discontinued, mostly because Bob Crump passed away, and we have built all the units that were ordered from him.
We tried heliarcing a unit, but decided it was too difficult not to make a serious error that would mar the outside finish.
The bare cases were hogged out from a solid block of aircraft grade aluminum and cost us $3,000 a set to produce. I know that many of you cannot understand or believe this, but that is what it cost us. This is also one of the reasons why we are not continuing to order new cases for any future units.
The CTC preamp is now being discontinued, mostly because Bob Crump passed away, and we have built all the units that were ordered from him.
We tried heliarcing a unit, but decided it was too difficult not to make a serious error that would mar the outside finish.
The bare cases were hogged out from a solid block of aircraft grade aluminum and cost us $3,000 a set to produce. I know that many of you cannot understand or believe this, but that is what it cost us. This is also one of the reasons why we are not continuing to order new cases for any future units.
Hi John,
How about the "Blowtorch Light". Change the case construction to something less costly to build. How about a retro 20's style with acrylic strips along the side that light up blue or white?
Now that would be cool. The best part is that the price would drop and you could produce more. This would increase your profit and brand awareness.
Anyway. You have a product that performs with a proven track record. Couple that with cool and you may make some money and have some fun at the same time. Get a matching amp to go with it, possibly a low and higher powered example of your work.
-Chris
How about the "Blowtorch Light". Change the case construction to something less costly to build. How about a retro 20's style with acrylic strips along the side that light up blue or white?
Now that would be cool. The best part is that the price would drop and you could produce more. This would increase your profit and brand awareness.
Anyway. You have a product that performs with a proven track record. Couple that with cool and you may make some money and have some fun at the same time. Get a matching amp to go with it, possibly a low and higher powered example of your work.
-Chris
Unfortunately, 'light' doesn't work in my world. Look at what Chas Hansen can do! It's OK, I AM working on a phono only design, but still I am having a problem with making an attractive case that will also shield from RFI. It is my biggest problem so far.
The design is relatively easy. 😱
The design is relatively easy. 😱
Hi John,
I was thinking of a metal exterior with the transparent "fins" running around the side. Think twenties and thirties. They wouldn't project very far. Then light them up as a power indicator.
I suspect that the time is right to make a statement piece that harks back to a time when things were made heavy and with a sense of style. Light plastic cases were the furthest from my intention here. Something that people would stop and look at. Something that would make you want to walk over and touch it. It would also sound fabulous and so the combination is very attractive.
-Chris
I was thinking of a metal exterior with the transparent "fins" running around the side. Think twenties and thirties. They wouldn't project very far. Then light them up as a power indicator.
I suspect that the time is right to make a statement piece that harks back to a time when things were made heavy and with a sense of style. Light plastic cases were the furthest from my intention here. Something that people would stop and look at. Something that would make you want to walk over and touch it. It would also sound fabulous and so the combination is very attractive.
-Chris
Hi John,
Our design style at home goes towards Art Deco, not Rococo. I was trying to give you an idea for a stylish, functional, but interesting shell to house your excellent electronics in. To make it visually pleasing and very different.
What would you consider as a desirable appearance? What would make it interesting to approach and want to touch?
The WAF appeal is extremely important in a high end audio component. Nothing would please me more than to see some visually appealing and interesting audio that also sounded as good as it looked. Timeless would be nice too. To tell you the truth, I'll bet many menfolk would appreciate something that isn't industrial in appearance.
So John, no matter what you build, what do you see it looking like?
-Chris
In what way am I asking you to compromise anything? I am sorry, but you have really lost me here. I was being serious.
Our design style at home goes towards Art Deco, not Rococo. I was trying to give you an idea for a stylish, functional, but interesting shell to house your excellent electronics in. To make it visually pleasing and very different.
What would you consider as a desirable appearance? What would make it interesting to approach and want to touch?
The WAF appeal is extremely important in a high end audio component. Nothing would please me more than to see some visually appealing and interesting audio that also sounded as good as it looked. Timeless would be nice too. To tell you the truth, I'll bet many menfolk would appreciate something that isn't industrial in appearance.
So John, no matter what you build, what do you see it looking like?
-Chris
Hi Steve,
I wish I had the skill, tools and material to finish my projects properly. Instead all I get is "that's nice honey, now get it out of here".
-Chris 🙂
I wish I had the skill, tools and material to finish my projects properly. Instead all I get is "that's nice honey, now get it out of here".
-Chris 🙂
anatech said:
Hehehe. Yeah, probably wouldn't be too easy to make a chassis out of Swarovski crystal. 😀
se
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