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Question regarding general schematic detail for transformers

Started by Unknown December 9, 2014
On Wednesday, December 10, 2014 11:02:25 AM UTC-5, Robert Macy wrote:
> On Tue, 09 Dec 2014 23:40:17 -0700, Tim Williams > <tiwill@seventransistorlabs.com> wrote: > > > I was taught, solid lines mean laminated iron core, dashed means powdered > > or ferrite. > > > > Occasionally you'll see a single line, which might imply a smaller core > > (or a lazy drafter). > > > > A single line with an arrowhead means a variable reluctance coil (e.g., > > slug tuned). > > > > Three lines might simply reinforce the concept of a laminated iron core > > (proactive drafter?), or provide a symmetrical way to connect a grounding > > wire to the core (common in sensitive applications, audio amps, test > > equipment..). > > > > Sensitive applications may also have shields, usually indicated as dashed > > lines between a given winding, or set of windings, and the core. > > > > There's also the uncommon tradition of a diagonal slash at each end: > > . / > > . /--------------/ > > . /--------------/ > > . / > > to indicate a square loop (magnetic amplifier type) core. > > > > Tim > > > > EE's knew what you meant, but the OP is not a EE, so should probably > expand that to > > "...indicate a square hysteresis core..." [shich actually means a core > WITH square hysteresis characteristics] and then add, where the core has > almost no linear range of operation, it is either fully saturated one way > or the other. Such cores are used in circuitry called 'magnetic amplifiers'
Thanks to each of you for your responses -- pretty much my original ideas are confirmed. FYI, the OP is both an EE and a physicist -- Masters in both from Univ. od Texas Austin. Last year, the OP published a book on high level electronic system design(SystemC and SustemC-AMS).
John Larkin wrote:
> On Wed, 10 Dec 2014 14:01:47 -0700, Don Y<this@is.not.me.com> wrote: > >> On 12/10/2014 9:07 AM, John Larkin wrote: >> >>> Note that L denotes an inductor and T a transformer. Is's annoying >>> when amateurs make up things like IC3 and FET7 and RLY2. There *are* >>> rules for reference designators. >> >> There are *conventions*, not "rules". (Where are the Designator Police?) > > There are MIL and ANSI specs for reference designators. > > My only break from the rules is to use D (not CR) for diodes. I don't > use many dynamotors on my boards these days. > > Things like CON4 and TR3 and RN5 and POT2 look dumb. But everyone is > free to look dumb if they want to. > >
So, you do no use Crystal Rectifiers, you use poems to death (Die Odes)...
On Thu, 11 Dec 2014 00:24:55 -0800, Robert Baer
<robertbaer@localnet.com> wrote:

>John Larkin wrote: >> On Wed, 10 Dec 2014 14:01:47 -0700, Don Y<this@is.not.me.com> wrote: >> >>> On 12/10/2014 9:07 AM, John Larkin wrote: >>> >>>> Note that L denotes an inductor and T a transformer. Is's annoying >>>> when amateurs make up things like IC3 and FET7 and RLY2. There *are* >>>> rules for reference designators. >>> >>> There are *conventions*, not "rules". (Where are the Designator Police?) >> >> There are MIL and ANSI specs for reference designators. >> >> My only break from the rules is to use D (not CR) for diodes. I don't >> use many dynamotors on my boards these days. >> >> Things like CON4 and TR3 and RN5 and POT2 look dumb. But everyone is >> free to look dumb if they want to. >> >> > So, you do no use Crystal Rectifiers, you use poems to death (Die >Odes)...
12-step recovery diodes. -- John Larkin Highland Technology, Inc picosecond timing laser drivers and controllers jlarkin att highlandtechnology dott com http://www.highlandtechnology.com
"John Larkin" <jlarkin@highlandtechnology.com> wrote in message 
news:vlfj8alht6abs92s63e8uchq7esnkf01lt@4ax.com...
>> So, you do no use Crystal Rectifiers, you use poems to death (Die >>Odes)... > > 12-step recovery diodes.
Well, you could probably make exactly such a device with heterojunction fabs available these days! [Oops, forgot a punny reply.] Tim -- Seven Transistor Labs Electrical Engineering Consultation Website: http://seventransistorlabs.com
On Thu, 11 Dec 2014 15:12:38 -0600, "Tim Williams"
<tiwill@seventransistorlabs.com> wrote:

>"John Larkin" <jlarkin@highlandtechnology.com> wrote in message >news:vlfj8alht6abs92s63e8uchq7esnkf01lt@4ax.com... >>> So, you do no use Crystal Rectifiers, you use poems to death (Die >>>Odes)... >> >> 12-step recovery diodes. > >Well, you could probably make exactly such a device with heterojunction >fabs available these days! > >[Oops, forgot a punny reply.] > >Tim
Something about doping maybe? -- John Larkin Highland Technology, Inc picosecond timing precision measurement jlarkin att highlandtechnology dott com http://www.highlandtechnology.com
John Larkin wrote:
> On Thu, 11 Dec 2014 00:24:55 -0800, Robert Baer > <robertbaer@localnet.com> wrote: > >> John Larkin wrote: >>> On Wed, 10 Dec 2014 14:01:47 -0700, Don Y<this@is.not.me.com> wrote: >>> >>>> On 12/10/2014 9:07 AM, John Larkin wrote: >>>> >>>>> Note that L denotes an inductor and T a transformer. Is's annoying >>>>> when amateurs make up things like IC3 and FET7 and RLY2. There *are* >>>>> rules for reference designators. >>>> >>>> There are *conventions*, not "rules". (Where are the Designator Police?) >>> >>> There are MIL and ANSI specs for reference designators. >>> >>> My only break from the rules is to use D (not CR) for diodes. I don't >>> use many dynamotors on my boards these days. >>> >>> Things like CON4 and TR3 and RN5 and POT2 look dumb. But everyone is >>> free to look dumb if they want to. >>> >>> >> So, you do no use Crystal Rectifiers, you use poems to death (Die >> Odes)... > > 12-step recovery diodes. > >
OOooooh...THAT is *good*!
Tim Williams wrote:
> "John Larkin"<jlarkin@highlandtechnology.com> wrote in message > news:vlfj8alht6abs92s63e8uchq7esnkf01lt@4ax.com... >>> So, you do no use Crystal Rectifiers, you use poems to death (Die >>> Odes)... >> >> 12-step recovery diodes. > > Well, you could probably make exactly such a device with heterojunction > fabs available these days! > > [Oops, forgot a punny reply.] > > Tim >
Forgot to give equal opportunity to homojunction fabs...
On Thu, 11 Dec 2014 19:09:34 -0800, Robert Baer
<robertbaer@localnet.com> wrote:

>Tim Williams wrote: >> "John Larkin"<jlarkin@highlandtechnology.com> wrote in message >> news:vlfj8alht6abs92s63e8uchq7esnkf01lt@4ax.com... >>>> So, you do no use Crystal Rectifiers, you use poems to death (Die >>>> Odes)... >>> >>> 12-step recovery diodes. >> >> Well, you could probably make exactly such a device with heterojunction >> fabs available these days! >> >> [Oops, forgot a punny reply.] >> >> Tim >> > Forgot to give equal opportunity to homojunction fabs...
Are Trans-istors bidirectional switches? -- John Larkin Highland Technology, Inc picosecond timing laser drivers and controllers jlarkin att highlandtechnology dott com http://www.highlandtechnology.com
John Larkin <jlarkin@highlandtechnology.com> wrote:
> On Thu, 11 Dec 2014 00:24:55 -0800, Robert Baer > <robertbaer@localnet.com> wrote: >> John Larkin wrote: >> >>> My only break from the rules is to use D (not CR) for diodes. I >>> don't use many dynamotors on my boards these days. >> >> So, you do no use Crystal Rectifiers, you use poems to death (Die >> Odes)... > > 12-step recovery diodes.
Those aren't so good when your circuit needs to run on a battery; they don't work without higher power. Matt Roberds
>"Tim Williams Dec 10
>Other recipients: >I was taught, solid lines mean laminated iron core, dashed means powdered or >ferrite. Occasionally you'll see a single line, which might imply a smaller core >(or a lazy drafter). A single line with an arrowhead means a variable reluctance >coil (e.g >I was taught, solid lines mean laminated iron core, dashed means powdered >or ferrite. "
That was a long time ago. the way some are drawn now you cano't tell a frasenstat from a thinamajig. Like this : http://www.edn.com/electronics-blogs/serious-fun/4427471/Funniest-schematic-ever