[Elecraft] K1 toroid winding

[Oliver Johns]

Dear Bud,

Winding the toroids is easy.  Tinning the leads is hard, unless you  
have a solder pot or some such.  That's where the Toroid Guy  
<toroidguy at earthlink.net> shines.  His are beautifully tinned.  Saves  
you from potential bad solders onto the boards.

Oliver Johns
W6ODJ


On 18 Feb 2008, at 12:38 AM, Dave Andrus wrote:

> Bud:
>
> I've seen the advice, and it's all excellent, but for someone new  
> to the art, it might still sound just a bit intimidating ("remember  
> to do this, don't forget to do that"), so I'll offer my 2 cents  
> just to try and make it a bit worse!
>
> Remember that it's only mysterious until you've actually wound your  
> first toroid.  After that, it's all mostly downhill (with the wind  
> at your back, usually)!
>
> Remember that you're going to get a (typically) excellent manual  
> from Elecraft that goes out of its way to show you pictures and  
> give lots of good advice when you need it--at the moment you're  
> winding the first toroid.  I've done lots and lots of toroids, and  
> I still was impressed with the graphics, winding instructions and  
> lead dressing advice that's in the manual.  So, don't be afraid to  
> try--they're really not hard at all, just new to someone that's  
> never done one before.  In fact, one could say that they're no  
> harder than winding any inductor, and in some ways quite a bit easier.
>
> If you try your first one, and you're still not sure if it's right,  
> take a quickie digital picture of your finished toroid, and email  
> it to either Elecraft's great tech support folks or here on the  
> reflector (just don't send big attachements if you can avoid it).   
> Then ask, "Hey, how does this one look?"  Guaranteed you'll have  
> lots of seasoned eyes looking over your shoulder.
>
> Don't be afraid to try.  Oh, and did I forget to mention that I  
> ordered my recent K2 toroid set from Mychael, the coil guy!?  He's  
> quick (had them in 3 days from across the country), not too  
> expensive, and his toroids look great.  Hey, I already know how to  
> wind 'em.  Don't need more practice ;-)
>
> It cut a couple of hours off of my build time.
>
> 73,
>
> Dave K7DAA
>
> http://www.k7daa.com
>
> On Feb 17, 2008, at 4:37 PM, John R. Lonigro wrote:
>
>> Bud:
>> Here's a little tip (I'll leave the poetry to Wayne):  The first  
>> winding tends to be the loosest, so wind N + 1 turns and then  
>> remove the first one, ending up with the correct number.  But make  
>> sure you double check the number of turns.  Being off by "only" 1  
>> turn may not sound bad, but in many cases it represents a big  
>> increase in inductance, possibly over 10%.  As others have said,  
>> just count the number of times the wire passes through the center  
>> of the toroid.
>>
>> I've easily wound well over 100 toroids in the past few years and  
>> have never had a problem with winding them.  Be especially careful  
>> stripping the wire before soldering it into the circuit.  You can  
>> search the archives for various techniques.  One thing I do in  
>> that regard is insert the part BEFORE stripping the wire, to check  
>> for proper fit.  Then I trim it, leaving maybe 1/8" extra on each  
>> lead.  Finally I remove it and concentrate on stripping the wire  
>> where I know it's going to be contacting the solder pad.  If you  
>> don't trim it first, you'll end up spending lots of time stripping  
>> parts of the wire that will either be snipped off after soldering  
>> or will be nowhere near the solder pad.
>>
>> 73's and good luck,
>>
>> John AA0VE
>> bud73 at comcast.net wrote:
>>> I just ordered a K1 four band transceiver.
>>> I am worried about the torroids .... should I be?
>>>
>>>    Bud
>>>
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