low MHz connector design consultant
in [Design]
|
From: Michael A. Terrell on 29 Apr 2010 23:49 Robert Baer wrote: > > mook johnson wrote: > > Gents, > > > > I looking for a consultant that can assist in the design of a custom > > military style connector with controlled characteristic impedance and > > insertion loss between two terminals in the 1MHz - 20MHz frequency range. > > > > This connector is special because is the application so an off the shelf > > component will not work. > > > > Any leads where I can start looking for such a consultant? > > > > thanks > > > > > > > Am a bit confused; just because an application is special does not > mean that a special connector needs to be mickey moused. > Doesn't everyone absolutely *hate* it when a maker of a widget > purposely with malice and forethought design something that cannot be > fixed or repaired unless the user treks back to the evil maker? > An RCA phono type connector is almost good enough, a BNC certainly fits. Even a good quality 'F' or 'G' connector is good at 20 MHz, as long as the power level isn't too high. I like the 'G' series for modular designs. The male connector is just pushed onto the female connector. These are used in CATV line, trunk and bridging amplifiers, along with all the plug in filters with a VERY low failure rate. -- Anyone wanting to run for any political office in the US should have to have a DD214, and a honorable discharge.
From: mook johnson on 30 Apr 2010 07:54 "John Larkin" <jjlarkin(a)highNOTlandTHIStechnologyPART.com> wrote in message news:ql9kt5tg7s7e5q7pb460gcdig4r00jjmrj(a)4ax.com... > On Thu, 29 Apr 2010 18:30:41 -0500, "mook johnson" <mook(a)mook.net> > wrote: > >>Gents, >> >>I looking for a consultant that can assist in the design of a custom >>military style connector with controlled characteristic impedance and >>insertion loss between two terminals in the 1MHz - 20MHz frequency range. >> >>This connector is special because is the application so an off the shelf >>component will not work. >> >>Any leads where I can start looking for such a consultant? >> >>thanks >> >> > > There are so many military connectors, including ones for wild > environments, hermetic, etc, some standard part might work. > > 20 MHz isn't very demanding. Most any mil connector will be "matched" > to any impedance at 20 MHz. Wavelength is 15 meters! > > John The connector I need goes into environments that far exceed military applications but the physical concept is similar. We have an in-house connector company that makes these connectors for us but they have never had to deal with never greater than >200KHz signals before. We tried using our regular connectors for this application and the impedance mismatch and insertion loss were extreme at 5 - 20MHz. The Zo mismatched by 50% and was not stable above 1MHz and had several resonant modes. Insertion loss something on the order is 6dB/connector and we'll have a couple dozen in series on this line. The number of series connection is the is the rub and it is unavoidable, non negotiable. There are some commercial plastic connectors that tested very well (just to validate our test setup) with good impedance match/stability (+/- 5%) and low insertion loss (.1dB/connector) but they won't take the environment. I'm looking for a consultant that can provide either of the following 1) model a connector that is already designed but not made (basically review the in-house company proposed design) and simulate the high frequency response of the design. 2) Give direction for the connector design based on constraints of material choices, physical size and geometry to meet the desired electrical signal characteristics while withstanding the environmental conditions. The cut and try approach based on simple equations has a long cycle time. I'm looking to improve my chances of getting it right the first time.
From: Jan Panteltje on 30 Apr 2010 08:00 On a sunny day (Thu, 29 Apr 2010 20:42:20 -0700) it happened Robert Baer <robertbaer(a)localnet.com> wrote in <HJ6dnS6NUP8JzEfWnZ2dnUVZ_sGdnZ2d(a)posted.localnet>: >mook johnson wrote: >> Gents, >> >> I looking for a consultant that can assist in the design of a custom >> military style connector with controlled characteristic impedance and >> insertion loss between two terminals in the 1MHz - 20MHz frequency range. >> >> This connector is special because is the application so an off the shelf >> component will not work. >> >> Any leads where I can start looking for such a consultant? >> >> thanks >> >> >> > Am a bit confused; just because an application is special does not >mean that a special connector needs to be mickey moused. > Doesn't everyone absolutely *hate* it when a maker of a widget >purposely with malice and forethought design something that cannot be >fixed or repaired unless the user treks back to the evil maker? > An RCA phono type connector is almost good enough, a BNC certainly fits. Maybe he has size or power constaints? Humidity? Else the old Amphenol PL259...
From: tm on 30 Apr 2010 08:46 "mook johnson" <mook(a)mook.net> wrote in message news:CEoCn.150671$gF5.132244(a)newsfe13.iad... > Gents, > > I looking for a consultant that can assist in the design of a custom > military style connector with controlled characteristic impedance and > insertion loss between two terminals in the 1MHz - 20MHz frequency range. > > This connector is special because is the application so an off the shelf > component will not work. > > Any leads where I can start looking for such a consultant? > > thanks > > > Go you have a valid email address? Tom
From: tm on 30 Apr 2010 08:48
"tm" <noone(a)msc.com> wrote in message news:hrejb7$j6e$1(a)speranza.aioe.org... > > "mook johnson" <mook(a)mook.net> wrote in message > news:CEoCn.150671$gF5.132244(a)newsfe13.iad... >> Gents, >> >> I looking for a consultant that can assist in the design of a custom >> military style connector with controlled characteristic impedance and >> insertion loss between two terminals in the 1MHz - 20MHz frequency range. >> >> This connector is special because is the application so an off the shelf >> component will not work. >> >> Any leads where I can start looking for such a consultant? >> >> thanks >> >> >> > Go you have a valid email address? > > Tom > That should be "do you have an email address?" The one above bounces. |