[HBR] 85 Kc Ifs at that watery place - wind your own

[bignick at execpc.com]

Sheesh!

Embrace the homebrewer within you!

Build
your own winder .. Like this!

https://www.youtube.com/watch?v=FIOocMoRsYQ

--KC9KEP


>           Best bet is to acquire a Morris Coilmaster winder.
I've
> attempted home brew winders using a friction coupling and
was never
> satisfied with the results as my rubber drive settings
eventually
> drifted on coils with a large turns count such as
700-800 or  larger but
> I will continue to play with it. BTW
additional cams for the Coilmaster
> can be fabricated by shaping
a fender washer and soldering on a quarter
> inch shaft coupling
off of center.
> Video of my Coilmaster:
>
http://k4che.com/Tempvideo/Morrisosc.mp4
> 
>   Random
winding coils can be made using sewing machine bobbins as
>
suggested by k5bcg.
> http://www.qsl.net/k5bcq/COIL/COIL.html
>           When using the plastic sewing machine bobbins you can
remove
> the sides of two of the bobbins and tape the shafts
together together to
> accommodate  more wire. The bobbins keep
all the windings in one place
> as you random weave the wire back
and forth.  A shaft on a electric
> screw driver can  turn the
bobbin while you concentrate on weaving the
> wire.
> 
> BTW a handy turns counter can be made using a micro-switch and a
$1
> dollar store calculator. Only the cheaper calculators can be
modified.
> 
>
http://k4che.com/Tempvideo/Digcounter.mp4
> 
> What is the
mod to the calculator? That is the home work assignment.
> 
> Many thanks to N3FRQ for his generosity and transferring
"stuff from his
> pile to my pile".
> 
>
k4che
> 
> 
> 
> 
> On 2/13/2015
9:02 AM, Bill Cromwell wrote:
>> Hi Stan,
>>
>> We really can wind our own. There are several web pages
describing
>> various ways to do it. Martin has pointed at the
bugaboo. At low IF
>> frequencies such as 455 kc or even lower
at 85 kc there are a lot of
>> turns of very fine wire. How
much patience do you have?
>>
>> There *are* hams
who have done it. I have unwound 455 kc cans
>> (counting
turns) and then rewound for a different range. I didn't need
>>
bifocals at the time and there were *NO* IF cans available for the
>> frequency I wanted. The IF transformers I wound pretty much
worked but
>> it took a long time and a sore neck to
complete.
>>
>> Martin mentioned the coil winder and
if I was going to wind coils in
>> those frequency ranges again
I would acquire one. There are plans on
>> the web to build
your own.
>>
>> 73,
>>
>> Bill
 KU8H
>>
>>
>> On 02/13/2015 08:31 AM,
Stan McIntosh wrote:
>>> Just how much trouble are we asking
for if we try to custom-wind a
>>> can for
>>>
a given frequency?  Sure, I know how to use a dip-meter, but a friend
>>> years
>>> ago gave me a baggie full of
unassembled IF cans... including empty
>>> bobbins
>>> for the wire.
>>>
>>>
Regards,
>>> Stan
>>> kd4bth
>>>
______________________________________________________________
>>>
>>
>>
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>
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