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  1. courtl

    HA7210 Low Power Crystal Oscillator

    Hi, Thanks for the suggestions but having found the failures initially within the products we have now tested the IC's directly out of packaging and they either work or they don't so it seems that the yield issue is from the manufacturer which is a little disappointing. This has also happened...
  2. courtl

    HA7210 Low Power Crystal Oscillator

    Hi, I have been using the HA7210 crystal oscillator for a number of years across a whole host of products. Its a simple IC with a crystal on the input giving a clock signal on the output. However I have received several batches lately made in different countries all of which have a failure...
  3. courtl

    Self Levelling/Low Viscosity Potting Compound

    Hi, I am looking for a fairly quick setting, low temp cure potting compound or epoxy/adhesive that is self levelling/low viscosity. It will be used to fill fairly wide/long (only 1 -2mm deep) voids in a PCB. It also needs to be non-conductive. It doesn't have to set hard, so can be rubbery...
  4. courtl

    Bat46 Schottky Diode

    Hi, Does anyone know what the surface mount alternative is to a BAT46 small signal Schottky diode. I can only seem to get them as a DO35 package (leaded). I am assuming the surface mount alternative has a different number? Thanks
  5. courtl

    Gold Package to Gold Substrate soldering

    Hi, I need some help/advice on the best way to solder or epoxy a gold packaged device onto a gold plated track. At present we use an Indium solder, however it is very time consuming as the substate tracking has to be pre-tinned and each individual component is pre-tinned before the packages...
  6. courtl

    Epoxy Pressure Sealing

    Thanks everyone for your suggestions, I am looking into all the ideas, hopefully I can find something that will work!! Fingers crossed :-)
  7. courtl

    Epoxy Pressure Sealing

    Please can someone advise on the best epoxy to use for pressure sealing? I am trying to seal a cavity on top of an RF filter which contains the tuning screws. The unit is pressurised to 3.5bar and the leak rate has to be better that 5cc/hr. We have tried eccobond type epoxies, but after aging...
  8. courtl

    Standard Fastener Dimensions - Screw Sizes

    Thanks for everyones suggestions! I think I can go and 're-buid' my useful sheet of A4 now! :-)
  9. courtl

    Standard Fastener Dimensions - Screw Sizes

    Thanks for the help. Please excuse my ignorance in these things but what is TOC? :-)
  10. courtl

    Good analog design book(s)

    I vote for the Art of Electronics. We used to call it the bible at University! Very good book. :-)
  11. courtl

    Standard Fastener Dimensions - Screw Sizes

    Please could someone point me in the right direction....? A little while ago I used to have an A4 sheet which gave different screw head types and the basic dimensions. It also gave the dimensions for nuts and spring washers etc. However as happens to all useful bits of paper it got...
  12. courtl

    IC005261 datasheet (Power Electronics)

    Hi, Don't know whether this helps but another manufacturer is Saftronics. See link: http://www.galco.com/mktg/flitreq.htm :-)
  13. courtl

    I'm looking for websites...

    Hi, Try these for a start, the second one has some good info links on it: http://www.ee.surrey.ac.uk/Personal/D.Jefferies/mstrip.html http://www.rfcafe.com/ regards Linda
  14. courtl

    time delay circuit/component

    Could just use an RC network, depending on the application being dependant on a threshold voltage or not. :-)
  15. courtl

    Sample and Hold problems

    Thanks for the suggestions BrianG and automatic2. The S/H is sampling part of a pulse. The Sample gate signal is coming from a PLD and is definately wide enough for this application. The offset and noise is something I have thought about when we are sampling down at 2mV, there is a small...
  16. courtl

    Sample and Hold problems

    Hi there, I am currently having a problem with a Sample and Hold circuit that is used to Sample a voltage which can range from 3V down to 2mV. The output of this is then fed to a comparator which compares the sample and hold value with the next signal received. This then either gives an...
  17. courtl

    Microsoft VISIO for circuit drawing

    Hi, The following website has some RF stencils for download, I think there is a very small cost though. http://www.rfcafe.com/ there are other websites out there that have other stencils that people have made themselves for free download, its just a case of trawling through the internet...
  18. courtl

    HP 8510A to C upgrade questions

    Hi, I don't think you will have a huge problem with using your old sweeper. The only thing that it may affect is the dynamic range and that's usually due to how much power your sweeper can output compared to what the analyser requires. I use all sorts of combinations of new and old...
  19. courtl

    DIP to SOIC Test socket adaptor

    Thanks all I have now found what I am looking for and it is a 'ZIF' apadter and socket.
  20. courtl

    DIP to SOIC Test socket adaptor

    :-) Thanks..... I have tried all the search combinations and as you suggest have found quite a few companies that do this kind of thing. But I have had no success in finding an adaptor with a test bed on top, where the IC can be placed in and out, all I can find is adaptors that convert from...

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