From: jl@glen--canyon.com   
      
   On Wed, 12 Nov 2025 02:05:28 -0500, "Edward Rawde"   
    wrote:   
      
   >"Bill Sloman"  wrote in message news:10f1   
   b8$18b8d$1@dont-email.me...   
   >> On 12/11/2025 4:24 pm, john larkin wrote:   
   >>> On Wed, 12 Nov 2025 00:13:08 -0500, "Edward Rawde"   
   >>>  wrote:   
   >>>   
   >>>> Due to a "Header too long" message while trying to reply to Bill Sloman's   
   post at 11:41 PM in "coil impedance".   
   >>>> Here is my reply.   
   >>>>   
   >>>> "Bill Sloman"  wrote in message news:   
   0f135p$17b8q$1@dont-email.me...   
   >>>>> On 12/11/2025 1:49 am, Edward Rawde wrote:   
   >>>>>> "Bill Sloman"  wrote in message new   
   :10evhdm$p0a1$2@dont-email.me...   
   >>>>>>> On 11/11/2025 11:12 pm, Edward Rawde wrote:   
   >>>>>>>> "Bill Sloman"  wrote in message n   
   ws:10eunlu$hv9m$1@dont-email.me...   
   >>>>>>>>> On 11/11/2025 2:48 am, Edward Rawde wrote:   
   >>>>>>>>>> "Bill Sloman"  wrote in message   
   news:10es5mv$3r8qk$1@dont-email.me...   
   >>>>>>>>>>> On 10/11/2025 4:01 pm, Edward Rawde wrote:   
   >>>>>>>>>>>> "Bill Sloman"  wrote in message   
   news:10erqko$3o5c0$6@dont-email.me...   
   >>>>>>>>>>>>> On 10/11/2025 3:29 pm, Edward Rawde wrote:   
   >>>>>>>>>>>>>> "Bill Sloman"  wrote in message   
   news:10ermr8$3o5c0$1@dont-email.me...   
   >>>>>>>>>>>>>>> On 10/11/2025 2:57 am, Edward Rawde wrote:   
   >>>>>>>>>>>>>>>> "Bill Sloman"  wrote in message   
   news:10epc7k$33b3h$1@dont-email.me...   
   >>>>>>>>>>>>>>>>> On 9/11/2025 4:01 am, Edward Rawde wrote:   
   >>>>>>>>>>>>>>>>>> "Bill Sloman"  wrote in message   
   news:10emnnb$2cnh3$1@dont-email.me...   
   >>>>>>>>>>>>>>>>>>> On 8/11/2025 4:49 am, Edward Rawde wrote:   
   >>>>>>>>>>>>>>>>>>>> "Bill Sloman"  wrote in message   
   news:10elb3i$20r3i$3@dont-email.me...   
   >>>>>>>>>>>>>>>>>>>>> On 8/11/2025 3:31 am, Edward Rawde wrote:   
   >>>>>>>>>>>>>>>>>>>>>> "Liz Tuddenham"    
   wrote in message   
   >>>>>>>>>>>>>>>>>>>>>> news:1rlfnmd.5t4y3yjlsancN%liz@poppyrecor   
   s.invalid.invalid...   
   >>>>>>>>>>>>>>>>>>>>>>> Bill Sloman  wrote:   
   >>>>>>>>>>>>>>>>>>>>>>>   
   >>>>>>>>>>>>>>>>>>>>>>>> On 7/11/2025 9:24 pm, Liz Tuddenham wrote:   
   >>>>>>>>>>>>>>>>>>>>>>>>> Bill Sloman  wrote:   
   >>>>>>>>>>>>>>>>>>>>>>>>>   
   >>>>>>>>>>>>>>>>>>>>>>>>>> On 7/11/2025 10:41 am, john larkin wrote:   
   >>>>>   
   >>>>>    
   >>>>>   
   >>>>>> If you believe that I ever mentioned tantalum bead capacitors anywhere   
   >>>>>> else then you need to reference that post and the specific part of it   
   or shut up.   
   >>>>>   
   >>>>> I never said you did. The schematic just showed big capacitors, and in   
   real life they would have been tantalum bead parts.   
   >>>>   
   >>>> Excuse me while I fall about laughing.   
   >>>>   
   >>>> I could ask you to reference or post this schematic which showed big   
   capacitors (plural)   
   >>>> but I'm not going to bother.   
   >>   
   >> I've got the file on my computer under the file name "John May 2025-02-15".   
   The file shows C3 and C6 as 100uF electrolytics.   
   >> You have to dig into the part name to find the word "tantalum".   
   >>   
   >> > Tantalums are prone to detonation, if handled badly. And they are   
   >> > often handled badly.   
   >>   
   >> John Larkin may be in the habit of not taking data sheets seriously, but   
   more serious people are more careful. George Kent and   
   >> Cambridge Instruments designed them into products, and  they didn't   
   "detonate" in the field. Junior engineers did occasionally   
   >> solder them into prototypes the wrong way around, but they didn't do it   
   twice.   
   >>   
   >   
   >After fixing microfarad extraneous character issues I found that the circuit   
   you posted with the "tantalum" capacitors does   
   >simulate.   
   >But it is not equivalent to the circuit JM posted and it has much worse   
   harmonic performance.   
   >And I have never seen it before.   
   >   
   >The only circuit I clearly remember (very very clearly) is the one with the   
   470uF capacitor which JM certainly did post because I   
   >just took it from his post.   
   >   
   >So I suspect that the "tantalum" version is a creation of your own which you   
   never posted until now.   
   >   
   >   
      
   We don't often use tantalums these days. They do have about the right   
   ESR to stabilize some older voltage regulators. They are reliable if   
   peak current stays low, and if voltage derated at least 2:1.   
      
   We use polymer aluminums whenever we can. Low ESR, low ESL, don't   
   detonate or dry out. Adding ESR isn't difficult.   
      
      
      
   John Larkin   
   Highland Tech Glen Canyon Design Center   
   Lunatic Fringe Electronics   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)