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141. LF: Re: Bug report (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Tue, 9 Jul 2002 22:16:37 +0200
Hi Alan, ...you know what I said about the bugs creeping in as the code increases!! Hihi.. Yes, I think it is an exponential function (at least!). When the code exceeds a certain critical mass, it is
/rsgb_lf_group-archives/html/rsgb_lf_group/2002-07/msg00213.html (8,335 bytes)

142. LF: Re: LITZ wire X enameled (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Tue, 9 Jul 2002 20:22:53 +0200
Marcus, I don't know how much better Litz can do in your case but the winding length is also important for efficiency. If I remember correctly, best efficiency (power transfer) is achieved when the w
/rsgb_lf_group-archives/html/rsgb_lf_group/2002-07/msg00215.html (8,195 bytes)

143. LF: Summer Bonus bug report (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Tue, 9 Jul 2002 20:06:43 +0200
Hi Alan, I think the reactance value is a little bit off. It think that the accuracy can be improved somewhat by placing a 'k' to the left of the word 'Ohm'. Summer returned to southern SM today afte
/rsgb_lf_group-archives/html/rsgb_lf_group/2002-07/msg00216.html (8,407 bytes)

144. Re: LF: Re: toroid cores (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Sun, 25 Aug 2002 00:41:23 +0200
Michael, I didn't say it was 3F3. I am sure it was a 58mm 3C85 core. The colo(u)r may look like orange in the picture but in reality it is red (I have the xfmr in my hand right now). I may be mistake
/rsgb_lf_group-archives/html/rsgb_lf_group/2002-08/msg00020.html (8,618 bytes)

145. LF: Re: toroid cores (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Fri, 23 Aug 2002 22:34:36 +0200
Hello Rik Ferrite (as opposed to iron powder) is best for power transformation on LF because of its high permeability, fewer turns = less copper loss. Iron powder is better for resonant circuits and
/rsgb_lf_group-archives/html/rsgb_lf_group/2002-08/msg00031.html (9,565 bytes)

146. LF: Re: Re: Re: Limiter in Jason reception (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Fri, 16 Aug 2002 00:47:00 +0200
Stewart, does your Jason decoder try to keep track of symbol timing or does it only wait looking for the next transition (as the native decoder)? If timing is important, how will slight timing errors
/rsgb_lf_group-archives/html/rsgb_lf_group/2002-08/msg00072.html (9,195 bytes)

147. LF: [off-band again] Weak Jason test signal (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Wed, 14 Aug 2002 22:51:51 +0200
Hi All I am transmitting a 10mW Jason signal on 3594 kHz (center), USB mode. It will be on the air until 1200UTC tomorrow. 72 Johan SM6LKM
/rsgb_lf_group-archives/html/rsgb_lf_group/2002-08/msg00079.html (8,170 bytes)

148. LF: Re: Re: Limiter in Jason reception (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Sun, 11 Aug 2002 22:17:21 +0200
I implemented an 'Hendrixizer' Thanks Alberto, I love the word! I am looking forward to see it in radio DSP literature together with Weaver, Hilbert, Hamming, Costas & Co. 73 Johan SM6LKM (still laug
/rsgb_lf_group-archives/html/rsgb_lf_group/2002-08/msg00110.html (8,714 bytes)

149. LF: Re: SM6LKM Jason beacon affected by multipath (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Fri, 9 Aug 2002 21:47:41 +0200
Good evening Wolf & All The 7 MHz signal suffers from multipath, every Jason symbol (tone) now consists of two peaks separated 50..150 mHz (m=milli, M=Mega, the European way). The decoder doesn't lik
/rsgb_lf_group-archives/html/rsgb_lf_group/2002-08/msg00128.html (8,849 bytes)

150. LF: SM6LKM beacon QRT tonight (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Fri, 9 Aug 2002 20:22:09 +0200
Hi My Jason beacon is now down because of a thunderstorm. More thunder is expected tonight so the beacon will remain QRT until tomorrow. Yes, I can turn it but not now. I am busy with other duties. P
/rsgb_lf_group-archives/html/rsgb_lf_group/2002-08/msg00130.html (12,462 bytes)

151. LF: Re: SM6LKM Jason beacon (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Fri, 9 Aug 2002 11:31:24 +0200
Thanks to Walter G3JKV and Bernd DF8ZR for the reception reports. The beacon will keep running for some time. I'll let you know when I shut it down. Center frequency: 7000.013 kHz (*) Jason TX mode:
/rsgb_lf_group-archives/html/rsgb_lf_group/2002-08/msg00144.html (10,813 bytes)

152. Re: LF: SM6LKM Jason beacon QSY (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Fri, 9 Aug 2002 01:40:40 +0200
Uwe, thanks for the screenshot from jo43sv. 10 dB QRO was enough. Apart from the "CX" at the beginning, it is solid copy. If/when I get a reception report from the U.K. I will start to reduce the out
/rsgb_lf_group-archives/html/rsgb_lf_group/2002-08/msg00147.html (10,301 bytes)

153. LF: Re: Jason test (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Fri, 9 Aug 2002 01:22:08 +0200
Hi OK, another test tonight and I may even forget to turn it off at bedtime ! Nil copy here (unless the message is very obscure), see attachment. Still nothing on 7000.003kHz I have QSYed to 7000.013
/rsgb_lf_group-archives/html/rsgb_lf_group/2002-08/msg00148.html (8,805 bytes)

154. LF: Jason beacon now QRV QSY QRO (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Fri, 9 Aug 2002 01:10:45 +0200
Hi My Jason beacon is back on the air. Now on 7000.013 kHz with 15 mW into the dipole. (+10 dB since last try) 72/73 Johan SM6LKM
/rsgb_lf_group-archives/html/rsgb_lf_group/2002-08/msg00150.html (9,895 bytes)

155. LF: Re: Re: Jason Tests / Reasons for different soundcard sensitivity (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Thu, 8 Aug 2002 23:37:45 +0200
The curious thing is that if clipping occurs before the signal reaches the sound card, the results are better than if clipping occurs in the sound card - I would expect the effect of clipping would
/rsgb_lf_group-archives/html/rsgb_lf_group/2002-08/msg00151.html (9,557 bytes)

156. LF: SM6LKM Jason beacon QSY (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Thu, 8 Aug 2002 23:53:48 +0200
Dear Jim, thanks for "listening". [...] I would suggest QSYing up 10Hz, which would put you in the clear. Thanks for the suggestion. I will put it on 7000.013 kHz and also add a class D "pair of boot
/rsgb_lf_group-archives/html/rsgb_lf_group/2002-08/msg00152.html (9,993 bytes)

157. LF: Re: RE off band Jason (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Thu, 8 Aug 2002 12:24:59 +0200
Hi Bernd, Andy Is number 5 still alive, hi? By USB, do you mean the frequency specified is the carrier and the centre 800 Hz (or whatever) higher, or is 7000.003 the centre of the transmission ? I'm
/rsgb_lf_group-archives/html/rsgb_lf_group/2002-08/msg00162.html (11,076 bytes)

158. LF: [off band Jason] (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Thu, 8 Aug 2002 01:48:42 +0200
Hi I am experimenting with Jason on HF and I have a tiny beacon running Jason on 7000.003 kHz (USB). The beacon is GPS disciplined and should be accurate to within 1E-10 or so. The output power is 1.
/rsgb_lf_group-archives/html/rsgb_lf_group/2002-08/msg00166.html (8,406 bytes)

159. LF: Re: SV: O copy in Sweden (Intern) (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Fri, 27 Sep 2002 20:41:00 +0200
Hei undrer hvor mange som er aktive på 136kHz i Sverige? Hej Jan-Martin, SM6BHZ är mycket aktiv just nu. Förutom jag själv har SM6PXJ, SM6OEW, SM7EUF (?) och SM3UWS varit i luften, kanske fler. Jag
/rsgb_lf_group-archives/html/rsgb_lf_group/2002-09/msg00033.html (8,633 bytes)

160. LF: O copy of RU6LWZ in Sweden (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Thu, 26 Sep 2002 22:31:52 +0200
Hi RU6LWZ is booming in with O + 20dB :-) Screenshot attached. 73 Johan SM6LKM P.S. SM6BHZ is calling CQ right now on 136505. TIFF image
/rsgb_lf_group-archives/html/rsgb_lf_group/2002-09/msg00046.html (8,177 bytes)


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