Comments for LB3HC's hightech blog http://www.lb3hc.net Amateur radio, RF design, electronics, uC, software, hacks, technology Fri, 16 Mar 2012 18:43:38 +0000 hourly 1 http://wordpress.org/?v=3.3.1 Comment on HF converter for SDR Funcube dongle by f 60194 http://www.lb3hc.net/archives/1296#comment-443 f 60194 Fri, 16 Mar 2012 18:43:38 +0000 http://www.lb3hc.net/?p=1296#comment-443 hello, very good, bonjour a tous très sympa cette réalisation. hello, very good, bonjour a tous très sympa cette réalisation.

]]> Comment on How to upgrade the firmware of your Funcube dongle by admin http://www.lb3hc.net/archives/1248#comment-372 admin Fri, 03 Feb 2012 09:00:26 +0000 http://www.lb3hc.net/archives/1248#comment-372 Hi Jeff. Thanks for the comment. I will update the article about this. Hi Jeff. Thanks for the comment. I will update the article about this.

]]> Comment on How to upgrade the firmware of your Funcube dongle by Jeff Murri http://www.lb3hc.net/archives/1248#comment-371 Jeff Murri Fri, 03 Feb 2012 00:20:08 +0000 http://www.lb3hc.net/archives/1248#comment-371 Great post, just one comment. Before you leave the FCHIDBL.exe program, make sure you click the "Reset to App" button or you're FunCube is still sitting there in bootloader mode. Great post, just one comment. Before you leave the FCHIDBL.exe program, make sure you click the “Reset to App” button or you’re FunCube is still sitting there in bootloader mode.

]]> Comment on Receiving wideband FM with the Funcube dongle by admin http://www.lb3hc.net/archives/1241#comment-369 admin Wed, 01 Feb 2012 20:22:46 +0000 http://www.lb3hc.net/archives/1241#comment-369 Hi. Are you sure you have upgraded the Funcube to the latest firmware? See my post about upgrading. You have a tab in SDR-RADIO that shows if you have phase lock. If you don't have phase lock it appears like the Funcube accepts the QRG commands and there is noise, but no signals. Also, you should find a QRG where you know for sure that you have a strong FM broadcaster. Try with your kitchen RX for example. HTH Hi. Are you sure you have upgraded the Funcube to the latest firmware? See my post about upgrading. You have a tab in SDR-RADIO that shows if you have phase lock. If you don’t have phase lock it appears like the Funcube accepts the QRG commands and there is noise, but no signals. Also, you should find a QRG where you know for sure that you have a strong FM broadcaster. Try with your kitchen RX for example.

HTH

]]> Comment on Receiving wideband FM with the Funcube dongle by jlx http://www.lb3hc.net/archives/1241#comment-368 jlx Wed, 01 Feb 2012 00:53:43 +0000 http://www.lb3hc.net/archives/1241#comment-368 How did you manage to do that. i cannot even see any normal FM broadcasts. no matter what settings i try. everything else works fine thou How did you manage to do that. i cannot even see any normal FM broadcasts. no matter what settings i try. everything else works fine thou

]]> Comment on Receiving wideband FM with the Funcube dongle by Bruce Tanner http://www.lb3hc.net/archives/1241#comment-365 Bruce Tanner Mon, 30 Jan 2012 03:14:40 +0000 http://www.lb3hc.net/archives/1241#comment-365 Comment on HI-POT TESTER by admin http://www.lb3hc.net/hipot#comment-332 admin Thu, 20 Oct 2011 19:10:38 +0000 http://192.168.0.124/?page_id=702#comment-332 I have now posted the schematic in a separate post. You can also download the LTspice file if you want to simulate the circuit. You can download LTspice here: http://www.linear.com/designtools/software/ I have now posted the schematic in a separate post. You can also download the LTspice file if you want to simulate the circuit. You can download LTspice here: http://www.linear.com/designtools/software/

]]> Comment on High potential testing of an YC-179 high power vacuum tube by admin http://www.lb3hc.net/archives/1116#comment-331 admin Thu, 20 Oct 2011 17:17:26 +0000 http://www.lb3hc.net/?p=1116#comment-331 Hi Jim. There is only a few uA (1-2uA) leakage at 13KV. Hardly noticeable. Above that it starts to rise faster but only to 15uA- at 15-16KV. I have used solvent to degrease the ceramics. Hi Jim. There is only a few uA (1-2uA) leakage at 13KV. Hardly noticeable. Above that it starts to rise faster but only to 15uA- at 15-16KV. I have used solvent to degrease the ceramics.

]]> Comment on High potential testing of an YC-179 high power vacuum tube by Jim http://www.lb3hc.net/archives/1116#comment-330 Jim Thu, 20 Oct 2011 17:01:31 +0000 http://www.lb3hc.net/?p=1116#comment-330 YC-156A/179should hipot double rated plate voltage or:13kv with 0 leakage current.Some good tubes have shown false reading on the hipot if ceramic is dirty or contaminated.A tube will show excessive grid current when close to the end of it`s useful life..GL with your project..Jim..K7RDX.. YC-156A/179should hipot double rated plate voltage or:13kv with 0 leakage current.Some good tubes have shown false reading on the hipot if ceramic is dirty or contaminated.A tube will show excessive grid current when close to the end of it`s useful life..GL with your project..Jim..K7RDX..

]]> Comment on HI-POT TESTER by admin http://www.lb3hc.net/hipot#comment-329 admin Thu, 20 Oct 2011 16:55:46 +0000 http://192.168.0.124/?page_id=702#comment-329 No problem Dick. I can post the LTspice simulation schematic for it. Let me prepare a post for it as soon as possible. No problem Dick. I can post the LTspice simulation schematic for it. Let me prepare a post for it as soon as possible.

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