[DSP-10] Re: DSP-10 Digest, Vol 17, Issue 3

[Christophe DONZELOT]

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>Today's Topics:
>
>   1. winding L32 inductor (christophe DONZELOT (HB9TLN))
>   2. Re: winding L32 inductor (kd7ts)
>
>
>----------------------------------------------------------------------
>
>Message: 1
>Date: Fri, 17 Jun 2005 12:56:58 +0100
>From: "christophe DONZELOT (HB9TLN)" <hb9tln at hb9ww.ampr.org>
>Subject: [DSP-10] winding L32 inductor
>To: DSP-10 at mailman.qth.net
>Message-ID: <42B2BA8A.9000703 at hb9ww.ampr.org>
>Content-Type: text/plain; charset=us-ascii; format=flowed
>
>I have quite finished my dsp-10 building work but I don't know exactly 
>how to wind the L32 inductor .
>In the kit the tapr have supplied to me there are small toroids .
>How much toroids does I need to wind this inductor ?
>
>best 73
>
>chris HB9TLN
>
>
>------------------------------
>
>Message: 2
>Date: Fri, 17 Jun 2005 06:55:31 -0700
>From: kd7ts <kd7ts at ispwest.com>
>Subject: Re: [DSP-10] winding L32 inductor
>To: Discussion of DSP-10 2-meter transceiver <dsp-10 at mailman.qth.net>
>Message-ID: <42B2D653.4020805 at ispwest.com>
>Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
>  Hi Chris,
>
>First, I must mention that I did not build from a TAPR kit,
>maybe someone can confirm the following.
>
>There should be a total of 11*  FT23-43 cores, two each are used on 
>cables connected to:
>
>J1
>
>J2
>
>J3
>
>J105
>
>J106
>
>One core is used to make the filter inductor L32
>
>L32
>
>330 µH; 52 turns #32 enameled wire on an Amidon F-23-43 toroid
>core.
>
>
>and an excerpt from the original construction notes:
>
>L32 is wound with #32 wire and the core is about 1/4 inch in diameter. 
>In order that this core not behave as an antenna at 15 kHz it needs to 
>be small and the magnetic field needs to be concentrated in the core 
>(no air gaps.)This is achieved with this coil design, but it does take 
>a few minutes to wind.  Try to keep the turns in line around the
>toroid.  But, don't worry if the turns sometimes overlap or get looped 
>under the prior turn.  It will not affect the functionality.
>
>* I might be wrong on the total quantity of FT23-43, but it is a least 11.
>
>
>I hope this answers your question, have fun
>
>73 KD7TS
>
>Mike
>
>
>
>
>
>
>
>------------------------------
>
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>End of DSP-10 Digest, Vol 17, Issue 3
>*************************************
>  
>
Thanks you Mike .
I didn't understand why I have so much ft23-43 toroidal cores but now 
it's ok .
The other are used as ferrite bead to block RFI from coax shield.

73 de chris HB9TLN/ZZ1ZZA