On Sunday, February 25, 2018 at 1:35:04 PM UTC-5, Phil Hobbs wrote:> On 02/25/2018 11:43 AM, Long Hair wrote: > > pcdhobbs@gmail.com wrote: > > > >> Floor space is a bit of an issue, because we've got a lot of good stuff: > >> > >> https://electrooptical.net/Lab_Tour/ > >> > >> https://electrooptical.net/Equipment > >> > >> So I really need a shorter version of the big HP rack in the photos. > > >> > > > > Are you planning on using the rack as a mobile device? > > > > Because they are almost always fitted with small diameter hard casters. > > If you look at the big rack, you'll find that it's sitting on a chunk of > butcher block with large cast-iron cylindrical casters with heavy solid > tires from McMaster-Carr. It rolls great. The smaller rack won't need > such beefy wheels. > > > > Those Tek carts, BTW can have heavy items fitted right down next to > > the floor. It ain't no scope cart. New ones sell for $1500. That is > > all we use in our labs. The last one had four in it, right before the > > boss moved. > > Carts I can get for cheap, but I really want a rack. Failing all else, > I can get a couple of two-post relay racks and have some cross braces > welded on, but there must be some of the old-timey ones rattling round > out there. Maybe I'll do a road trip to the Dayton Hamfest this year.In grad school my prof found racks expensive, but the wood shop was cheap, we had wooden racks, 2x4 boxes, with metal cross braces, slots in the 2x4 held plywood shelves. George H.> > Cheers > > Phil Hobbs > > > -- > Dr Philip C D Hobbs > Principal Consultant > ElectroOptical Innovations LLC / Hobbs ElectroOptics > Optics, Electro-optics, Photonics, Analog Electronics > Briarcliff Manor NY 10510 > > http://electrooptical.net > http://hobbs-eo.com
FFT analyzer recommendations
Started by ●February 16, 2018
Reply by ●February 25, 20182018-02-25
Reply by ●February 25, 20182018-02-25
George Herold <gherold@teachspin.com> wrote:> In grad school my prof found racks expensive, but the wood shop was > cheap, we had wooden racks, 2x4 boxes, with metal cross braces, slots in > the 2x4 held plywood shelves.> George H.Plywood takes a permanent sag under weight. I use metal shelves from Global: http://www.globalindustrial.ca/g/storage/shelving/Steel-Shelving-Open/steel- shelving-20-gauge-97-high-open With 20 ga steel, they can support 200 lb per shelf. That's enough for a HP 8566 plus a stack of signal generators, dmms, vna, etc. or inventory per shelf. I get the 97" corner struts so I can cut them to whatever height I need. I put angle iron on the bottom of the legs and drill holes for casters or rollers to move them around. They are not expensive. One thing that threw me off at the beginning is they do not itemize orders when you buy multiple shelves. They simply send whatever shelves and support struts are necessary to fulfil the order. You have to sort them out yourself to match the type and number of shelving you ordered. But this is easy once you figure it out. Global is a Canadian company. You should be able to find equivalent companies across the US.
Reply by ●February 26, 20182018-02-26
On 02/23/2018 02:15 PM, Phil Hobbs wrote:> On 02/16/2018 09:59 AM, Phil Hobbs wrote: >> Hi, all, >> >> I need another FFT analyzer. I really like my HP 35660A, but it only >> goes up to 100 kHz (50 kHz for two-channel measurements). I'd really >> like one that goes up to at least 10 MHz, and can do the same sorts of >> stuff, especially display noise spectral density in different units on >> different scales and perform frequency response testing easily. >> >> There are a bunch of USB-style things, which might be okay as long as >> they have Linux software available. >> >> What I really want is a smallish boat anchor with two channels, 14-16 >> bit resolution, > 50 MS/s sampling, FFT analysis, a nice display, and >> that can talk to USB sticks. > > So my new-to-me HP 89441A analyzer is due to be here Tuesday. I noticed > that it doesn't have the serial cable--is it a regular straight-through > 9-pin cable, or something weird?The beast is currently sitting on my front porch, having been delivered earlier today. The box weighs over 100 pounds, so I'll have to get DFH to help move it. Probably nobody is going to steal it in the night. Film at 11. ;) Cheers Phil Hobbs -- Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC / Hobbs ElectroOptics Optics, Electro-optics, Photonics, Analog Electronics Briarcliff Manor NY 10510 http://electrooptical.net http://hobbs-eo.com
Reply by ●February 26, 20182018-02-26
On Mon, 26 Feb 2018 20:11:11 -0500, Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> wrote:>On 02/23/2018 02:15 PM, Phil Hobbs wrote: >> On 02/16/2018 09:59 AM, Phil Hobbs wrote: >>> Hi, all, >>> >>> I need another FFT analyzer.� I really like my HP 35660A, but it only >>> goes up to 100 kHz (50 kHz for two-channel measurements).� I'd really >>> like one that goes up to at least 10 MHz, and can do the same sorts of >>> stuff, especially display noise spectral density in different units on >>> different scales and perform frequency response testing easily. >>> >>> There are a bunch of USB-style things, which might be okay as long as >>> they have Linux software available. >>> >>> What I really want is a smallish boat anchor with two channels, 14-16 >>> bit resolution, > 50 MS/s sampling, FFT analysis, a nice display, and >>> that can talk to USB sticks. >> >> So my new-to-me HP 89441A analyzer is due to be here Tuesday. I noticed >> that it doesn't have the serial cable--is it a regular straight-through >> 9-pin cable, or something weird? > >The beast is currently sitting on my front porch, having been delivered >earlier today. The box weighs over 100 pounds, so I'll have to get DFH >to help move it. Probably nobody is going to steal it in the night. > >Film at 11. ;) > >Cheers > >Phil HobbsSheeesh! I have three different dolly types to cope with such, plus a block-and-tackle... quite convenient when you're 78 ;-) ...Jim Thompson -- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | STV, Queen Creek, AZ 85142 Skype: skypeanalog | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at http://www.analog-innovations.com | 1962 | It's what you learn, after you know it all, that counts.
Reply by ●February 26, 20182018-02-26
On Mon, 26 Feb 2018 18:30:16 -0700, Jim Thompson <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:>On Mon, 26 Feb 2018 20:11:11 -0500, Phil Hobbs ><pcdhSpamMeSenseless@electrooptical.net> wrote: > >>On 02/23/2018 02:15 PM, Phil Hobbs wrote: >>> On 02/16/2018 09:59 AM, Phil Hobbs wrote: >>>> Hi, all, >>>> >>>> I need another FFT analyzer.� I really like my HP 35660A, but it only >>>> goes up to 100 kHz (50 kHz for two-channel measurements).� I'd really >>>> like one that goes up to at least 10 MHz, and can do the same sorts of >>>> stuff, especially display noise spectral density in different units on >>>> different scales and perform frequency response testing easily. >>>> >>>> There are a bunch of USB-style things, which might be okay as long as >>>> they have Linux software available. >>>> >>>> What I really want is a smallish boat anchor with two channels, 14-16 >>>> bit resolution, > 50 MS/s sampling, FFT analysis, a nice display, and >>>> that can talk to USB sticks. >>> >>> So my new-to-me HP 89441A analyzer is due to be here Tuesday. I noticed >>> that it doesn't have the serial cable--is it a regular straight-through >>> 9-pin cable, or something weird? >> >>The beast is currently sitting on my front porch, having been delivered >>earlier today. The box weighs over 100 pounds, so I'll have to get DFH >>to help move it. Probably nobody is going to steal it in the night. >> >>Film at 11. ;) >> >>Cheers >> >>Phil Hobbs > >Sheeesh! I have three different dolly types to cope with such, plus a >block-and-tackle... quite convenient when you're 78 ;-) > > ...Jim ThompsonI did this, at around age 60... <http://www.analog-innovations.com/SED/BBQ_Project.pdf> all by my lonesome... the lift-table is quite the nicest tool. ...Jim Thompson -- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | STV, Queen Creek, AZ 85142 Skype: skypeanalog | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at http://www.analog-innovations.com | 1962 | It's what you learn, after you know it all, that counts.
Reply by ●February 26, 20182018-02-26
On 02/26/2018 08:30 PM, Jim Thompson wrote:> On Mon, 26 Feb 2018 20:11:11 -0500, Phil Hobbs > <pcdhSpamMeSenseless@electrooptical.net> wrote: > >> On 02/23/2018 02:15 PM, Phil Hobbs wrote: >>> On 02/16/2018 09:59 AM, Phil Hobbs wrote: >>>> Hi, all, >>>> >>>> I need another FFT analyzer. I really like my HP 35660A, but it only >>>> goes up to 100 kHz (50 kHz for two-channel measurements). I'd really >>>> like one that goes up to at least 10 MHz, and can do the same sorts of >>>> stuff, especially display noise spectral density in different units on >>>> different scales and perform frequency response testing easily. >>>> >>>> There are a bunch of USB-style things, which might be okay as long as >>>> they have Linux software available. >>>> >>>> What I really want is a smallish boat anchor with two channels, 14-16 >>>> bit resolution, > 50 MS/s sampling, FFT analysis, a nice display, and >>>> that can talk to USB sticks. >>> >>> So my new-to-me HP 89441A analyzer is due to be here Tuesday. I noticed >>> that it doesn't have the serial cable--is it a regular straight-through >>> 9-pin cable, or something weird? >> >> The beast is currently sitting on my front porch, having been delivered >> earlier today. The box weighs over 100 pounds, so I'll have to get DFH >> to help move it. Probably nobody is going to steal it in the night. >> >> Film at 11. ;) >> >> Cheers >> >> Phil Hobbs > > Sheeesh! I have three different dolly types to cope with such, plus a > block-and-tackle... quite convenient when you're 78 ;-) > > ...Jim Thompson >I usually get stuff delivered to the house, because there's nearly always somebody here. I'm generally at the lab during business hours, but not always. So this beast will be going in DFH's truck tomorrow. Cheers Phil Hobbs -- Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC / Hobbs ElectroOptics Optics, Electro-optics, Photonics, Analog Electronics Briarcliff Manor NY 10510 http://electrooptical.net http://hobbs-eo.com
Reply by ●February 26, 20182018-02-26
On 02/26/2018 08:38 PM, Jim Thompson wrote:> On Mon, 26 Feb 2018 18:30:16 -0700, Jim Thompson > <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote: > >> On Mon, 26 Feb 2018 20:11:11 -0500, Phil Hobbs >> <pcdhSpamMeSenseless@electrooptical.net> wrote: >> >>> On 02/23/2018 02:15 PM, Phil Hobbs wrote: >>>> On 02/16/2018 09:59 AM, Phil Hobbs wrote: >>>>> Hi, all, >>>>> >>>>> I need another FFT analyzer. I really like my HP 35660A, but it only >>>>> goes up to 100 kHz (50 kHz for two-channel measurements). I'd really >>>>> like one that goes up to at least 10 MHz, and can do the same sorts of >>>>> stuff, especially display noise spectral density in different units on >>>>> different scales and perform frequency response testing easily. >>>>> >>>>> There are a bunch of USB-style things, which might be okay as long as >>>>> they have Linux software available. >>>>> >>>>> What I really want is a smallish boat anchor with two channels, 14-16 >>>>> bit resolution, > 50 MS/s sampling, FFT analysis, a nice display, and >>>>> that can talk to USB sticks. >>>> >>>> So my new-to-me HP 89441A analyzer is due to be here Tuesday. I noticed >>>> that it doesn't have the serial cable--is it a regular straight-through >>>> 9-pin cable, or something weird? >>> >>> The beast is currently sitting on my front porch, having been delivered >>> earlier today. The box weighs over 100 pounds, so I'll have to get DFH >>> to help move it. Probably nobody is going to steal it in the night. >>> >>> Film at 11. ;) >>> >>> Cheers >>> >>> Phil Hobbs >> >> Sheeesh! I have three different dolly types to cope with such, plus a >> block-and-tackle... quite convenient when you're 78 ;-) >> >> ...Jim Thompson > > I did this, at around age 60... > > <http://www.analog-innovations.com/SED/BBQ_Project.pdf> > > all by my lonesome... the lift-table is quite the nicest tool.The Harvard Over-40 Rowing Club once had some tee shirts made that said, "The older we get, the better we were." ;) Cheers Phil Hobbs -- Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC / Hobbs ElectroOptics Optics, Electro-optics, Photonics, Analog Electronics Briarcliff Manor NY 10510 http://electrooptical.net http://hobbs-eo.com
Reply by ●February 26, 20182018-02-26
On Monday, February 26, 2018 at 8:30:27 PM UTC-5, Jim Thompson wrote:> On Mon, 26 Feb 2018 20:11:11 -0500, Phil Hobbs > <pcdhSpamMeSenseless@electrooptical.net> wrote: > > >On 02/23/2018 02:15 PM, Phil Hobbs wrote: > >> On 02/16/2018 09:59 AM, Phil Hobbs wrote: > >>> Hi, all, > >>> > >>> I need another FFT analyzer. I really like my HP 35660A, but it only > >>> goes up to 100 kHz (50 kHz for two-channel measurements). I'd really > >>> like one that goes up to at least 10 MHz, and can do the same sorts of > >>> stuff, especially display noise spectral density in different units on > >>> different scales and perform frequency response testing easily. > >>> > >>> There are a bunch of USB-style things, which might be okay as long as > >>> they have Linux software available. > >>> > >>> What I really want is a smallish boat anchor with two channels, 14-16 > >>> bit resolution, > 50 MS/s sampling, FFT analysis, a nice display, and > >>> that can talk to USB sticks. > >> > >> So my new-to-me HP 89441A analyzer is due to be here Tuesday. I noticed > >> that it doesn't have the serial cable--is it a regular straight-through > >> 9-pin cable, or something weird? > > > >The beast is currently sitting on my front porch, having been delivered > >earlier today. The box weighs over 100 pounds, so I'll have to get DFH > >to help move it. Probably nobody is going to steal it in the night. > > > >Film at 11. ;) > > > >Cheers > > > >Phil Hobbs > > Sheeesh! I have three different dolly types to cope with such, plus a > block-and-tackle... quite convenient when you're 78 ;-)Hydraulics... one use and you are spoiled for the rest of your life. :^) GH> > ...Jim Thompson > -- > | James E.Thompson | mens | > | Analog Innovations | et | > | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | > | STV, Queen Creek, AZ 85142 Skype: skypeanalog | | > | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | > | E-mail Icon at http://www.analog-innovations.com | 1962 | > > It's what you learn, after you know it all, that counts.
Reply by ●February 27, 20182018-02-27
On Mon, 26 Feb 2018 21:05:27 -0500, Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> wrote:>On 02/26/2018 08:38 PM, Jim Thompson wrote: >> On Mon, 26 Feb 2018 18:30:16 -0700, Jim Thompson >> <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote: >> >>> On Mon, 26 Feb 2018 20:11:11 -0500, Phil Hobbs >>> <pcdhSpamMeSenseless@electrooptical.net> wrote: >>> >>>> On 02/23/2018 02:15 PM, Phil Hobbs wrote: >>>>> On 02/16/2018 09:59 AM, Phil Hobbs wrote: >>>>>> Hi, all, >>>>>> >>>>>> I need another FFT analyzer.� I really like my HP 35660A, but it only >>>>>> goes up to 100 kHz (50 kHz for two-channel measurements).� I'd really >>>>>> like one that goes up to at least 10 MHz, and can do the same sorts of >>>>>> stuff, especially display noise spectral density in different units on >>>>>> different scales and perform frequency response testing easily. >>>>>> >>>>>> There are a bunch of USB-style things, which might be okay as long as >>>>>> they have Linux software available. >>>>>> >>>>>> What I really want is a smallish boat anchor with two channels, 14-16 >>>>>> bit resolution, > 50 MS/s sampling, FFT analysis, a nice display, and >>>>>> that can talk to USB sticks. >>>>> >>>>> So my new-to-me HP 89441A analyzer is due to be here Tuesday. I noticed >>>>> that it doesn't have the serial cable--is it a regular straight-through >>>>> 9-pin cable, or something weird? >>>> >>>> The beast is currently sitting on my front porch, having been delivered >>>> earlier today. The box weighs over 100 pounds, so I'll have to get DFH >>>> to help move it. Probably nobody is going to steal it in the night. >>>> >>>> Film at 11. ;) >>>> >>>> Cheers >>>> >>>> Phil Hobbs >>> >>> Sheeesh! I have three different dolly types to cope with such, plus a >>> block-and-tackle... quite convenient when you're 78 ;-) >>> >>> ...Jim Thompson >> >> I did this, at around age 60... >> >> <http://www.analog-innovations.com/SED/BBQ_Project.pdf> >> >> all by my lonesome... the lift-table is quite the nicest tool. > >The Harvard Over-40 Rowing Club once had some tee shirts made that said, >"The older we get, the better we were." ;) > >Cheers > >Phil HobbsToo soon, old... too late, smart. At my age "smart" outfoxes sore or torn rotator cuffs. ...Jim Thompson -- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | STV, Queen Creek, AZ 85142 Skype: skypeanalog | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at http://www.analog-innovations.com | 1962 | It's what you learn, after you know it all, that counts.
Reply by ●February 27, 20182018-02-27
On Mon, 26 Feb 2018 18:06:12 -0800 (PST), George Herold <gherold@teachspin.com> wrote:>On Monday, February 26, 2018 at 8:30:27 PM UTC-5, Jim Thompson wrote: >> On Mon, 26 Feb 2018 20:11:11 -0500, Phil Hobbs >> <pcdhSpamMeSenseless@electrooptical.net> wrote: >> >> >On 02/23/2018 02:15 PM, Phil Hobbs wrote: >> >> On 02/16/2018 09:59 AM, Phil Hobbs wrote: >> >>> Hi, all, >> >>> >> >>> I need another FFT analyzer.� I really like my HP 35660A, but it only >> >>> goes up to 100 kHz (50 kHz for two-channel measurements).� I'd really >> >>> like one that goes up to at least 10 MHz, and can do the same sorts of >> >>> stuff, especially display noise spectral density in different units on >> >>> different scales and perform frequency response testing easily. >> >>> >> >>> There are a bunch of USB-style things, which might be okay as long as >> >>> they have Linux software available. >> >>> >> >>> What I really want is a smallish boat anchor with two channels, 14-16 >> >>> bit resolution, > 50 MS/s sampling, FFT analysis, a nice display, and >> >>> that can talk to USB sticks. >> >> >> >> So my new-to-me HP 89441A analyzer is due to be here Tuesday. I noticed >> >> that it doesn't have the serial cable--is it a regular straight-through >> >> 9-pin cable, or something weird? >> > >> >The beast is currently sitting on my front porch, having been delivered >> >earlier today. The box weighs over 100 pounds, so I'll have to get DFH >> >to help move it. Probably nobody is going to steal it in the night. >> > >> >Film at 11. ;) >> > >> >Cheers >> > >> >Phil Hobbs >> >> Sheeesh! I have three different dolly types to cope with such, plus a >> block-and-tackle... quite convenient when you're 78 ;-)>Hydraulics... one use and you are spoiled for the rest of your life. >:^) GH > >>Yep, Hydraulics are your friend... <http://www.analog-innovations.com/SED/BBQ_Project.pdf> ...Jim Thompson -- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | STV, Queen Creek, AZ 85142 Skype: skypeanalog | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at http://www.analog-innovations.com | 1962 | It's what you learn, after you know it all, that counts.
