Yes and yes.
Robert if I order one of your phono stages will you let the order go through. TI and Maxim throw my sample requests in the trash. We are getting a little dis-harmonious and unmutual again, I would love to make up my own mind (can't promise anything). Just retail no favors please.
Yes, a usual precaution if the next stage has input coupling the caps can be shorted. I mis-typed, the caps are all 1% or 2% NOS polystyrene in fact I trashed one with a simple flick of a hot soldering iron.
.Mark, try OP275. It's a bit odd, somethimes no excitement, other times it sits on a PCB like a baby's bum on a pot. Try it as OP aupgrade on a Marantz or Philips CD player from the 90-ies and prepare to be pleasantly surprised. Rotel uses it for some phonosections in their integrated amps, as does H/K in models 970 and 980. Smooth and fluid.
-RNM
I can see an op-amp roller but you, why? It certainly won't do that well in your -140db oscillator for noise and THD reasons.
I am not sure how you can determine a fair price unless you know what it costs to produce it. I live in Los Angeles and want to use local metal shops who in turn need to pay for the obvious material, machinery, employees, floor space, etc. It is a bit tricky to have the piece drop off of the lathe without getting nicks. It takes a some design know how to do the curves right and keep it at a specific weight. To top it off, I order in very small quantities so the price I get is a little higher per piece.
Machinists around here wouldn't make one (or a few) for that much.
Material cost alone is over $10 each for a few. https://www.mcmaster.com/#standard-aluminum-rods/=15p90fz
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$45.00 retail for a nicely machined and finished chunk of aluminium considering material costs and workshop time at $2.00 to $3.00 per minute doesn't sound so bad.
Put it in a nice wooden cigar case and price it at $145.00 in a highend store and there would be no complaint.
How come all the tech and processing that goes into a set top DVD/HDTV tuner etc and then shipped around the world can be had for less than $45.00 retail, crazy.
Dan.
Put it in a nice wooden cigar case and price it at $145.00 in a highend store and there would be no complaint.
How come all the tech and processing that goes into a set top DVD/HDTV tuner etc and then shipped around the world can be had for less than $45.00 retail, crazy.
Dan.
I don't know about the rest of the world but here makers co-ops are very popular, usually having a CNC machine or at least a used Bridgeport. Typical DIY'ers do not value their own time with money so you spend a few hours getting trained and buy a scrap of aluminum rod out of the bin and say you did it yourself for $5. Turning down and center drilling a record clamp seems like a nice beginners project.
There is such a co-op in a city not too far from here. It costs $99/month to be a member, and classes for each part of the shop have to be taken and paid for before use is permitted. It would be faster and cheaper for me to buy a turn table weight from Morinix, if I needed one.
If I had the resources I would be popping up community 'maker centers' all over the place.
Retirees male and female could hang out, drink tea/coffee, talk shop and build/programme stuff during the day.
Youngsters could come after school and be mentored by the 'oldies' in all kinds of theory and (mass) production techniques.
Mums could come in the evening and prototype that 'thing' they always wanted but never had the opportunity.
The driving philosophy would be to identify and solve real world problems, with a view to commercialisation of products/ideas/technologies which would then reward the 'inventors' and also provide ongoing funding for the chain of 'member access tech centres'.
This environment of supply of venue/facilities/machinery, mentoring and freedom of useful collaboration could provide a conduit for many world beneficial ideas/products that otherwise might never see the light of day.
A suite of decent 3D printers could be a good earner.
Replacement parts, novelty items, some plastic gadget you always wanted etc could be designed at home in CAD.
Locals could then email an STL etc design file and collect the custom item from a local area center same/next day for a suitably profitable price.
Right now it's a thought experiment dream, I'm still working on the resources bit.
Tonight is fun night, my band mates Vdelli are back from Germany for their first show here in Perth in 10 months,
First return show, New Years Eve show plus the band's 20 Years Celebration performance all coinciding is looking to be a fun night, party time !.
Setup/soundcheck is at 5:30, the guys are insisting/begging that my filters are going on the PA, the sound guy doesn't know any of this and will be in for a treat, tonight will be the best live mix he has ever pulled lol.
Happy New Year to all.
Dan.
Retirees male and female could hang out, drink tea/coffee, talk shop and build/programme stuff during the day.
Youngsters could come after school and be mentored by the 'oldies' in all kinds of theory and (mass) production techniques.
Mums could come in the evening and prototype that 'thing' they always wanted but never had the opportunity.
The driving philosophy would be to identify and solve real world problems, with a view to commercialisation of products/ideas/technologies which would then reward the 'inventors' and also provide ongoing funding for the chain of 'member access tech centres'.
This environment of supply of venue/facilities/machinery, mentoring and freedom of useful collaboration could provide a conduit for many world beneficial ideas/products that otherwise might never see the light of day.
A suite of decent 3D printers could be a good earner.
Replacement parts, novelty items, some plastic gadget you always wanted etc could be designed at home in CAD.
Locals could then email an STL etc design file and collect the custom item from a local area center same/next day for a suitably profitable price.
Right now it's a thought experiment dream, I'm still working on the resources bit.
Tonight is fun night, my band mates Vdelli are back from Germany for their first show here in Perth in 10 months,
First return show, New Years Eve show plus the band's 20 Years Celebration performance all coinciding is looking to be a fun night, party time !.
Setup/soundcheck is at 5:30, the guys are insisting/begging that my filters are going on the PA, the sound guy doesn't know any of this and will be in for a treat, tonight will be the best live mix he has ever pulled lol.
Happy New Year to all.
Dan.
First I would use a brass for a record weight, aluminum can really ring. Then the workshops around here are I think $50 a month and the tools most used are 3D printers. I would use a small lathe to make the weight. The problem is that a CNC lathe looks more like a washing machine than anything else. It would spend just a few seconds facing the stock, then probably changing the bit and trimming the round surface, the next step would be boring the hole, finally parting the piece, all of which could take less time than it takes me to type this.
The issue is when the piece is parted it drops to the bottom and can get dented. So the automatic tool has to stop just before the piece drops and wait for it to be removed by hand. So a human has to stand by all the time.
Now the cost of aluminum runs around 3-4$ a pound in small quantities from a distributor. The manual machining time would be mostly tool changes. So about Half an hour to make one piece not including material procurement time. My cost of shop maintainence is around $50 a day for all my tools. That would add $3 to the cost. Skilled labor at $35 per hour would bring cost up to $24 for the piece. Allowing for profit and overhead would double that.
So you can save a bit if you DIY it and have access to the tools and machines.
The issue is when the piece is parted it drops to the bottom and can get dented. So the automatic tool has to stop just before the piece drops and wait for it to be removed by hand. So a human has to stand by all the time.
Now the cost of aluminum runs around 3-4$ a pound in small quantities from a distributor. The manual machining time would be mostly tool changes. So about Half an hour to make one piece not including material procurement time. My cost of shop maintainence is around $50 a day for all my tools. That would add $3 to the cost. Skilled labor at $35 per hour would bring cost up to $24 for the piece. Allowing for profit and overhead would double that.
So you can save a bit if you DIY it and have access to the tools and machines.
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