[minima] Re: Toroid size?
- From: hcker2000 <hcker2000@xxxxxxxxx>
- To: minima@xxxxxxxxxxxxx
- Date: Mon, 24 Mar 2014 09:39:00 -0400
Humm seeing as how a lack a scope I'm thinking I may need some one to wrap
my toroids.
On Fri, Mar 21, 2014 at 6:25 PM, Thomas Sarlandie <thomas@xxxxxxxxxxxxx>wrote:
> I have only rewound the transformer, not the inductors. Mark used 32 I
> think so you could look at his numbers, he usually just had one more turn
> than I did. What I have discovered is that the number of turns is not as
> important as the spacing between the turn and how much you spread it on the
> toroid. It's pretty sensitive and you get a lot of variations (10 to 20%).
>
> I bought the AADE LCR meter and I strongly recommend it. It's a very
> useful tool for that type of project: http://www.aade.com/lcmeter.htm
>
> At $100 in kit, this is also a fun evening project. Of course you can do
> without, just spread the turns to about 75%/80% of the toroid and then use
> a scope and a cheap generator to test the LPF when you are done.
>
> thomas
>
> thomas
>
>
> On Fri, Mar 21, 2014 at 1:37 PM, hcker2000 <hcker2000@xxxxxxxxx> wrote:
>
>> Can you post how many wraps your using of the 32awg your using for each
>> toroid? I would assume it should change based on wire size.
>>
>>
>> On Thu, Mar 20, 2014 at 11:51 PM, Thomas Sarlandie
>> <thomas@xxxxxxxxxxxxx>wrote:
>>
>>> I started with 36 AWG but I have now found 32 AWG and it is much better.
>>> 36 is too small, the wires would not even hold the toroid in place.
>>>
>>>
>>> On Sun, Mar 16, 2014 at 6:42 AM, Jeremy Chase <jeremychase@xxxxxxxxx>wrote:
>>>
>>>> What gauge wire did you use? Was it the same?
>>>> On Mar 16, 2014 12:50 AM, "Thomas Sarlandie" <thomas@xxxxxxxxxxxxx>
>>>> wrote:
>>>>
>>>>> Mike,
>>>>>
>>>>> This is what I used, based on Mark first build. You will also need 4
>>>>> ft37-43 (3 transformers + rfc).
>>>>> ValueQtyCoreN-Turns (Mark)N-Turns (Thomas).33 uH2 T37-6109.39 uH2T37-611
>>>>> 10.66 uH2T50-212 10.78 uH3T50-21311 3 uH3T332524
>>>>> 73,
>>>>> thomas
>>>>>
>>>>> On Fri, Mar 14, 2014 at 10:22 AM, hcker2000 <hcker2000@xxxxxxxxx>wrote:
>>>>>
>>>>>> Ok so I see there are ft50-43's and t50-X's I'm guessing the
>>>>>> ft50-43's is what I'm after.
>>>>>>
>>>>>>
>>>>>> On Fri, Mar 14, 2014 at 1:19 PM, Juan Carlos Berberena Glez <
>>>>>> jcberberena@xxxxxxxxx> wrote:
>>>>>>
>>>>>>> Hi Fellow
>>>>>>> Maybe it's helpful this link
>>>>>>>
>>>>>>> http://www.kitsandparts.com/toroids.php
>>>>>>> 73's
>>>>>>> Jc
>>>>>>>
>>>>>>>
>>>>>>> 2014-03-14 13:15 GMT-04:00 hcker2000 <hcker2000@xxxxxxxxx>:
>>>>>>>
>>>>>>> Ok all good info. So T50's for example would they be suitable for
>>>>>>>> this application (the minima)?
>>>>>>>>
>>>>>>>>
>>>>>>>> On Fri, Mar 14, 2014 at 1:08 PM, Joe Street
>>>>>>>> <jstreet@xxxxxxxxxxxx>wrote:
>>>>>>>>
>>>>>>>>> Amidon has some great application notes which cover the
>>>>>>>>> different materials and where their respective strengths and
>>>>>>>>> weaknesses
>>>>>>>>> lie. It's not as simple as which is better, it depends on the
>>>>>>>>> application,
>>>>>>>>> frequency range, whether or not the core has to be able to
>>>>>>>>> accommodate DC
>>>>>>>>> bias currents which can saturate the core, etc etc. Read up on the
>>>>>>>>> subject
>>>>>>>>> and you will do yourself a favour and be able to design your own
>>>>>>>>> inductors
>>>>>>>>> and transformers.
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> On 14/03/2014 11:49 AM, hcker2000 wrote:
>>>>>>>>>
>>>>>>>>> Is 43 better than 61 or is it the other way around?
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> On Fri, Mar 14, 2014 at 11:48 AM, hcker2000
>>>>>>>>> <hcker2000@xxxxxxxxx>wrote:
>>>>>>>>>
>>>>>>>>>> After looking at that I am tempted to ask "who wants to wrap
>>>>>>>>>> and send me some transformers/cores".
>>>>>>>>>>
>>>>>>>>>> What size did the original designer use?
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> On Fri, Mar 14, 2014 at 11:44 AM, Joe Rocci <joe@xxxxxxxxxx>wrote:
>>>>>>>>>>
>>>>>>>>>>> Go to this web site and download the very excellent toroid
>>>>>>>>>>> calculator program. It has all the information you need to deal
>>>>>>>>>>> with
>>>>>>>>>>> different types of toroids.
>>>>>>>>>>>
>>>>>>>>>>> http://www.dl5swb.de/html/mini_ring_core_calculator.htm
>>>>>>>>>>>
>>>>>>>>>>> Also, be aware that you'll need a good ferrite material for the
>>>>>>>>>>> transformers (type 43 or 61 typical), and low loss powdered iron
>>>>>>>>>>> cores for
>>>>>>>>>>> the filters (type 2 or 6 typical).
>>>>>>>>>>>
>>>>>>>>>>> Joe
>>>>>>>>>>> W3JDR
>>>>>>>>>>>
>>>>>>>>>>> ----- Original Message -----
>>>>>>>>>>> *From:* hcker2000 <hcker2000@xxxxxxxxx>
>>>>>>>>>>> *To:* minima@xxxxxxxxxxxxx
>>>>>>>>>>> *Sent:* Friday, March 14, 2014 11:24 AM
>>>>>>>>>>> *Subject:* [minima] Toroid size?
>>>>>>>>>>>
>>>>>>>>>>> I need to pick up some toroid's for winding. does the size
>>>>>>>>>>> mater? Links to some good sizes would be greatly appreciated.
>>>>>>>>>>>
>>>>>>>>>>> --
>>>>>>>>>>> Mike "hcker2000" Ashcraft
>>>>>>>>>>> http://bigironinteractive.com
>>>>>>>>>>>
>>>>>>>>>>> <http://www.linkedin.com/in/mikeashcraft>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> --
>>>>>>>>>> Mike "hcker2000" Ashcraft
>>>>>>>>>> http://bigironinteractive.com
>>>>>>>>>>
>>>>>>>>>> <http://www.linkedin.com/in/mikeashcraft>
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> --
>>>>>>>>> Mike "hcker2000" Ashcraft
>>>>>>>>> http://bigironinteractive.com
>>>>>>>>>
>>>>>>>>> <http://www.linkedin.com/in/mikeashcraft>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> --
>>>>>>>> Mike "hcker2000" Ashcraft
>>>>>>>> http://bigironinteractive.com
>>>>>>>>
>>>>>>>> <http://www.linkedin.com/in/mikeashcraft>
>>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> --
>>>>>>> *"If you have a penny and I have a penny and we exchange pennies,
>>>>>>> you still have one cent and I still have one cent. But if you have an
>>>>>>> idea
>>>>>>> and I have an idea and we exchange ideas, you now have two ideas and I
>>>>>>> now
>>>>>>> have two ideas."*
>>>>>>>
>>>>>>> Lic.Juan Carlos Berberena Gonzalez
>>>>>>> WJ6C exCO6BG
>>>>>>> www.berberena.com
>>>>>>> http://espanol.groups.yahoo.com/group/cacharreando/
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>
>>>>>>
>>>>>> --
>>>>>> Mike "hcker2000" Ashcraft
>>>>>> http://bigironinteractive.com
>>>>>>
>>>>>> <http://www.linkedin.com/in/mikeashcraft>
>>>>>>
>>>>>
>>>>>
>>>
>>
>>
>> --
>> Mike "hcker2000" Ashcraft
>> http://bigironinteractive.com
>>
>> <http://www.linkedin.com/in/mikeashcraft>
>>
>
>
--
Mike "hcker2000" Ashcraft
http://bigironinteractive.com
<http://www.linkedin.com/in/mikeashcraft>
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