Rewind BL2?

[Jim AB3CV]

I don't have a real use for the 4:1 winding mode of the BL2. Is it
possible to make more effective use of the cores if it was rewound
just for 1:1?

Right now it seems like in 1:1 position (if I'm reading the schematic
right) the choke halves are in parallel, effectively halving their
impedence.

jim ab3cv
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

[KU4AF]

Jim,
Instead of rewinding, how about just connecting the two bifilar windings in series?

John, KU4AF
Pittsboro, NC

Jim AB3CV wrote

I don't have a real use for the 4:1 winding mode of the BL2. Is it
possible to make more effective use of the cores if it was rewound
just for 1:1?

Right now it seems like in 1:1 position (if I'm reading the schematic
right) the choke halves are in parallel, effectively halving their
impedence.

jim ab3cv
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[e-mail]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

[Guy, K2AV]

Probably shouldn't mess with it.  The blocking impedance of both
halves in parallel is quite large, and more importantly allows you to
carry current overall at the rated power by dividing the current
between the two.  Put them in series and both are forced to carry the
same current, and power handling ability is cut in half at 1:1.

73, Guy.

On Sat, Mar 6, 2010 at 7:00 PM, KU4AF <[hidden email]> wrote:

>
> Jim,
> Instead of rewinding, how about just connecting the two bifilar windings in
> series?
>
> John, KU4AF
> Pittsboro, NC
>
>
> Jim AB3CV wrote:
>>
>> I don't have a real use for the 4:1 winding mode of the BL2. Is it
>> possible to make more effective use of the cores if it was rewound
>> just for 1:1?
>>
>> Right now it seems like in 1:1 position (if I'm reading the schematic
>> right) the choke halves are in parallel, effectively halving their
>> impedence.
>>
>> jim ab3cv
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>>
>>
> --
> View this message in context: http://n2.nabble.com/Rewind-BL2-tp4687794p4688370.html
> Sent from the Elecraft mailing list archive at Nabble.com.
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html