Re: mounting a pot core

From	Bill Sloman <bill.sloman@ieee.org>
Newsgroups	sci.electronics.design
Subject	Re: mounting a pot core
Date	2026-01-26 02:46 +1100
Organization	A noiseless patient Spider
Message-ID	<10l5dso$1onf4$1@dont-email.me> (permalink)
References	(8 earlier) <lh07nk10fi6ud49hc93jvrcpgptle21djk@4ax.com> <10l0731$1jnc$1@dont-email.me> <1rpgfx1.183lmxb18zpaqmN%liz@poppyrecords.invalid.invalid> <10l42tf$1bchc$1@dont-email.me> <1rphmt5.5p7897mt1pieN%liz@poppyrecords.invalid.invalid>

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On 25/01/2026 10:07 pm, Liz Tuddenham wrote:
> Bill Sloman <bill.sloman@ieee.org> wrote:
> 
>> On 25/01/2026 6:25 am, Liz Tuddenham wrote:
>>> Bill Sloman <bill.sloman@ieee.org> wrote:
>>>
>>>> On 24/01/2026 1:19 am, john larkin wrote:
>>>>> On Fri, 23 Jan 2026 16:01:58 +1100, Bill Sloman <bill.sloman@ieee.org>
>>>>> wrote:
>>>>>
>>>>>> On 23/01/2026 5:57 am, john larkin wrote:
>>>>>>> On Thu, 22 Jan 2026 10:58:01 -0500, legg <legg@nospam.magma.ca> wrote:
>>>>>>>
>>>>>>>> On Wed, 21 Jan 2026 16:34:34 -0800, john larkin <jl@glen--canyon.com>
>>>>>>>> wrote:
>>>>>>>>
>>>>>>>> <snip>
>>>>>>>>> We plan to buy a length of micro-coax with an SMB connector on each
>>>>>>>>> end. We'll wind that on the bobbin and plug it into pcb SMB
>>>>>>>>> connectors.
>>>>>>>>>
>>>>>>>>> Like this, but higher voltage.
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> https://www.dropbox.com/scl/fi/9hbvwwo2bmx4z33w9uetv/TX_1.jpg?rlkey=4
>>>>>>>>> j8llr8z6z360ec5b8adx53gz&raw=1
>>>>>>>>>
>>>>>>>>> Those tiny H.FL connectors can't take much voltage.
>>>>>>>>>
>>>>>>>>
>>>>>>>> Mount the transformer on the box wallwith on a layer of vibration
>>>>>>>> absorber.
>>>>>>>>
>>>>>>>> Connect your flying leads as required.
>>>>>>>>
>>>>>>>> Energy storage ~ minimum xsectional area - not mass. . . .
>>>>>>>> so align your slots.
>>>>>>>>
>>>>>>>> RL
>>>>>>>
>>>>>>> We like to put parts on PC boards. But why vibration isolation?
>>>>>>>
>>>>>>> We will use a bigger pot core on the new product. I measured a 2%
>>>>>>> change in inductance as the core halves were rotated, so slot
>>>>>>> alignment is no big deal.
>>>>>>
>>>>>> It doesn't degrade the performance much, but it is very visible evidence
>>>>>> that you and your production staff don't know enough about what you are
>>>>>> doing.
>>>>>
>>>>> Don't be a jerk. We sell lots of the digital delay generator with the
>>>>> optional high-voltage outputs. It works great.
>>>>
>>>> Customers don't tend to open them up and look at the construction.
>>>>
>>>>> What are you designing lately?
>>>>
>>>> Nothing much.
>>>>
>>>>>> Performance is what really matters, but getting stuff to look right is
>>>>>> also important.
>>>>>
>>>>> Nobody has complained about the cosmetics of the pot core gap
>>>>> alignment so far. We test every unit so the random alignment must not
>>>>> matter.
>>>>
>>>> It's not just the cosmetics. The random alignment doesn't matter much,
>>>> but it does make a difference, and you should have got it right.
>>>
>>> It depends on which way is 'right'.  If the bobbin is in two sections
>>> and has two separate windings which must be kept apart, staggering the
>>> 'windows' will ensure that the leads from the two windings are brought
>>> out in different places and they cannot stray anywhere near each other.
>>
>> That's the sort of scheme you get with people who don't know what they
>> are doing.
>>
>> If you don't want two pairs of leads to interact, twist each pair of
>> leads and take them out through different slots.
>>
>> Twisting each pair of leads separately is a much more potent protection
>> against interaction than just keeping them physically separate.
> 
> That's the sort of reply you get from someone who hasn't understood the
> previous post.

Dream on.

-- 
Bill Sloman, Sydney

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Thread

mounting a pot core john larkin <jl@glen--canyon.com> - 2026-01-21 08:45 -0800
  Re: mounting a pot core Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2026-01-21 12:28 -0500
  Re: mounting a pot core Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2026-01-21 12:28 -0500
    Re: mounting a pot core john larkin <jl@glen--canyon.com> - 2026-01-21 10:11 -0800
  Re: mounting a pot core Bill Sloman <bill.sloman@ieee.org> - 2026-01-22 04:49 +1100
    Re: mounting a pot core john larkin <jl@glen--canyon.com> - 2026-01-21 10:18 -0800
      Re: mounting a pot core Jeroen Belleman <jeroen@nospam.please> - 2026-01-21 23:47 +0100
        Re: mounting a pot core john larkin <jl@glen--canyon.com> - 2026-01-21 16:34 -0800
          Re: mounting a pot core Joe Gwinn <joegwinn@comcast.net> - 2026-01-21 19:48 -0500
            Re: mounting a pot core john larkin <jl@glen--canyon.com> - 2026-01-21 17:06 -0800
            Re: mounting a pot core Jeroen Belleman <jeroen@nospam.please> - 2026-01-22 13:17 +0100
              Re: mounting a pot core Joe Gwinn <joegwinn@comcast.net> - 2026-01-22 12:47 -0500
                Re: mounting a pot core Joe Gwinn <joegwinn@comcast.net> - 2026-01-22 15:49 -0500
                Re: mounting a pot core Jeroen Belleman <jeroen@nospam.please> - 2026-01-22 23:49 +0100
          Re: mounting a pot core Bill Sloman <bill.sloman@ieee.org> - 2026-01-22 17:57 +1100
            Re: mounting a pot core john larkin <jl@glen--canyon.com> - 2026-01-22 08:31 -0800
              Re: mounting a pot core Bill Sloman <bill.sloman@ieee.org> - 2026-01-23 15:57 +1100
                Re: mounting a pot core john larkin <jl@glen--canyon.com> - 2026-01-23 06:24 -0800
                Re: mounting a pot core Bill Sloman <bill.sloman@ieee.org> - 2026-01-24 03:35 +1100
                Re: mounting a pot core john larkin <jl@glen--canyon.com> - 2026-01-23 08:40 -0800
                Re: mounting a pot core Bill Sloman <bill.sloman@ieee.org> - 2026-01-24 17:01 +1100
          Re: mounting a pot core Jeroen Belleman <jeroen@nospam.please> - 2026-01-22 12:59 +0100
          Re: mounting a pot core legg <legg@nospam.magma.ca> - 2026-01-22 10:58 -0500
            Re: mounting a pot core john larkin <jl@glen--canyon.com> - 2026-01-22 10:57 -0800
              Re: mounting a pot core Bill Sloman <bill.sloman@ieee.org> - 2026-01-23 16:01 +1100
                Re: mounting a pot core john larkin <jl@glen--canyon.com> - 2026-01-23 06:19 -0800
                Re: mounting a pot core Bill Sloman <bill.sloman@ieee.org> - 2026-01-24 03:19 +1100
                Re: mounting a pot core liz@poppyrecords.invalid.invalid (Liz Tuddenham) - 2026-01-24 19:25 +0000
                Re: mounting a pot core Bill Sloman <bill.sloman@ieee.org> - 2026-01-25 14:33 +1100
                Re: mounting a pot core liz@poppyrecords.invalid.invalid (Liz Tuddenham) - 2026-01-25 11:07 +0000
                Re: mounting a pot core Bill Sloman <bill.sloman@ieee.org> - 2026-01-26 02:46 +1100
                Re: mounting a pot core legg <legg@nospam.magma.ca> - 2026-01-25 08:51 -0500
                Re: mounting a pot core john larkin <jl@glen--canyon.com> - 2026-01-25 08:08 -0800
                Re: mounting a pot core legg <legg@nospam.magma.ca> - 2026-01-25 22:44 -0500
                Re: mounting a pot core Bill Sloman <bill.sloman@ieee.org> - 2026-01-26 17:56 +1100
                Re: mounting a pot core legg <legg@nospam.magma.ca> - 2026-01-26 10:50 -0500
                Re: mounting a pot core Bill Sloman <bill.sloman@ieee.org> - 2026-01-27 03:23 +1100
                Re: mounting a pot core john larkin <jl@glen--canyon.com> - 2026-01-26 08:51 -0800
                Re: mounting a pot core john larkin <jl@glen--canyon.com> - 2026-01-26 07:53 -0800
                Re: mounting a pot core Bill Sloman <bill.sloman@ieee.org> - 2026-01-27 03:36 +1100
                Re: mounting a pot core john larkin <jl@glen--canyon.com> - 2026-01-26 08:48 -0800
                Re: mounting a pot core Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2026-01-26 13:12 -0500
                Re: mounting a pot core john larkin <jl@glen--canyon.com> - 2026-01-26 10:58 -0800
                Re: mounting a pot core Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2026-01-26 20:36 +0000
                Re: mounting a pot core Bill Sloman <bill.sloman@ieee.org> - 2026-01-27 14:30 +1100
      Re: mounting a pot core Bill Sloman <bill.sloman@ieee.org> - 2026-01-22 17:51 +1100
        Re: mounting a pot core john larkin <jl@glen--canyon.com> - 2026-01-22 11:09 -0800
          Re: mounting a pot core Bill Sloman <bill.sloman@ieee.org> - 2026-01-23 16:16 +1100
            Re: mounting a pot core john larkin <jl@glen--canyon.com> - 2026-01-23 06:13 -0800
              Re: mounting a pot core Jeroen Belleman <jeroen@nospam.please> - 2026-01-23 16:07 +0100
                Re: mounting a pot core john larkin <jl@glen--canyon.com> - 2026-01-23 08:22 -0800
                Re: mounting a pot core Jeroen Belleman <jeroen@nospam.please> - 2026-01-24 12:17 +0100
                Re: mounting a pot core john larkin <jl@glen--canyon.com> - 2026-01-24 07:54 -0800
                Re: mounting a pot core Jeroen Belleman <jeroen@nospam.please> - 2026-01-25 13:04 +0100
                Re: mounting a pot core john larkin <jl@glen--canyon.com> - 2026-01-25 07:33 -0800
                Re: mounting a pot core Jeroen Belleman <jeroen@nospam.please> - 2026-01-25 17:32 +0100
                Re: mounting a pot core john larkin <jl@glen--canyon.com> - 2026-01-25 11:12 -0800
                Re: mounting a pot core JM <sunaecoNoChoppedPork@gmail.com> - 2026-01-25 19:44 +0000
                Re: mounting a pot core john larkin <jl@glen--canyon.com> - 2026-01-25 13:07 -0800
                Re: mounting a pot core JM <sunaecoNoChoppedPork@gmail.com> - 2026-01-25 22:40 +0000
                Re: mounting a pot core john larkin <jl@glen--canyon.com> - 2026-01-25 17:29 -0800
                Re: mounting a pot core JM <sunaecoNoChoppedPork@gmail.com> - 2026-01-25 19:40 +0000
              Re: mounting a pot core Bill Sloman <bill.sloman@ieee.org> - 2026-01-24 03:39 +1100
                Re: mounting a pot core john larkin <jl@glen--canyon.com> - 2026-01-23 10:09 -0800
                Re: mounting a pot core Bill Sloman <bill.sloman@ieee.org> - 2026-01-24 16:49 +1100
  Re: mounting a pot core legg <legg@nospam.magma.ca> - 2026-01-22 10:46 -0500
    Re: mounting a pot core john larkin <jl@glen--canyon.com> - 2026-01-22 11:16 -0800

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