[Elecraft] KPA500 PA/LPF module mounting instruction problem
While building the KPA500 I found that the ten mounting holes on the PA/LPF module heatsink were not tapped deeply enough to accommodate the five 4-40 1/4" screws specified on page 22 of the assembly manual, nor the five 4-40 5/16" screws on page 24 of the manual. I had to use the 4-40 3/16" screws in both cases. If I had used the screw lengths as the manual specified, the module would be loose and insecurely fastened to both the Z-bracket and the right side panel. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] KX3 FD Operations?
I used the KX3 on 40 meter CW and PSK31 with Win4K3 software, DigiPan, an HF Packer Amplifier and 40 meter Loop Skywire at the River City ARCS Field Day in Rio Linda, CA. The power source were 105 Ah of sealed lead acid batteries and 90 watt solar panel. Some photos are at https://picasaweb.google.com/114032640816757126398/FieldDayStation Carol, KP4MD @ N6NA Field Day Station __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] XV Transverter Local Oscillator -- GPSDO?
The GPS reference we used was engineered by N6GN specifically for members of our 2 meter WSPR study group listed on http://www.qsl.net/kp4md/144_mhz_wspr.htm That discussion thread can be followed at https://groups.google.com/forum/#!topic/2-meter-wspr/-hDK071K1iM A ready made solution to produce a 116 MHz local oscillator locked to a 10 MHz GPS disciplined reference is N5AC's VHF ApolLO at http://www.n5ac.com/blog/products-page/apollo-synthesizers/vhf-apollo-assembled-tested/ Carol KP4MD On Tue, Jul 2, 2013 at 3:50 AM, David G4DMP da...@g4dmp.fsnet.co.uk wrote: Hello Carol - Thank you so much for your msg on the Elecraft reflector; I found your slide show most interesting. I use my XV144 with a K2. I have the crystal oven option and have also installed an internal fan similar to that fitted as standard to the XV432. Stability is not bad but certainly not good enough for WSPR or PSK32. I do have a GPS disciplined 10MHz standard. All I need now to follow your example is to find a means of getting 116MHz from it to lock the XV144. Do you have any circuit information of the PLL? Thanks again for your superb website. 73 David G4DMP __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] XV Transverter Local Oscillator -- GPSDO?
As I added the insulation and fan modifications just to stabilize the internal 116 MHz local oscillator, I feel certain that they are not necessary when using a GPS disciplined LO like N5AC's VHF ApolLO. That was an alternative I did consider before our own group project GPS10 became available. I would have fed the 10 MHz signal through the AUX BNC connector to a VHF ApolLO installed inside the Elecraft XV144 case. Anyway, I have left the fans running as I like to see the Elecraft transverter run cool. Carol On Tue, Jul 2, 2013 at 8:59 AM, Bill Schwantes bill4...@gmail.com wrote: Carol, You've done some nice work here, by identifying XV temperature sensitive oscillator components other than the crystal. I'm curious to see if the demonstrated stability could be reproduced without the insulation and fan modifications you made.. just the GPS disciplined 116 Mhz injection. If that works, one could package a GPS disciplined PLL synthesized oscillator board directly into the XV144. A board such as this is available from Steve Hicks, N5AC (and other sources). There are a number of approaches to minimizing PLL phase noise. If you are interested in those references, let me know. Bill, W7QQ On Mon, Jul 1, 2013 at 4:21 PM, Carol F. Milazzo, KP4MD/W6 kp...@cfmilazzo.com wrote: I have achieved frequency stability to 1 Hz with the Flex-1500 Elecraft XV144 transverter combination, using a GPS disciplined OCXO on 116 MHz. I have documented the XV144 frequency stability and drift data comparing the GPS control against the stock crystal oven option with enhanced thermal insulation here https://picasaweb.google.com/114032640816757126398/XV144FrequencyStabilityModifications The stock FLEX-1500 TCXO is sufficient to hold the frequency to within 1 Hz. Enabling the 10 MHz sine wave external reference on the FLEX-1500 should increase the frequency accuracy and stability to the millihertz range. Carol, KP4MD *Bill Schwantes* bill4070 at gmail.com elecraft%40mailman.qth.net?Subject=Re:%20%5BElecraft%5D%20XV%20Transverter%20Local%20Oscillator%20--%20GPSDO%3FIn-Reply-To=%3CCAFyNi86U3UyF%2Bu2eTUX0oG3pE%3D7zXb0VgjbijP8_xzgZGxXh%3DQ%40mail.gmail.com%3E *Thu Oct 20 00:57:06 EDT 2011* - Previous message: [Elecraft] W2problemshttp://mailman.qth.net/pipermail/elecraft/2011-October/157966.html - Next message: [Elecraft] AF peak filterhttp://mailman.qth.net/pipermail/elecraft/2011-October/157969.html - *Messages sorted by:* [ date ]http://mailman.qth.net/pipermail/elecraft/2011-October/date.html#157968 [ thread ]http://mailman.qth.net/pipermail/elecraft/2011-October/thread.html#157968 [ subject ]http://mailman.qth.net/pipermail/elecraft/2011-October/subject.html#157968 [ author ]http://mailman.qth.net/pipermail/elecraft/2011-October/author.html#157968 -- Hi Guys and Gals, Does anyone know of a mod to the Elecraft XV transverters that provides for 10 Mhz GPS disciplined oscillator control of the transverter local oscillator? I think that would be a popular feature for Elecraft to consider on future versions of XV transverters. It would be similar to the K3EXREF Frequency Lock Option for the K3, which works flawlessly. Bill, W7QQ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] XV Transverter Local Oscillator -- GPSDO?
I have achieved frequency stability to 1 Hz with the Flex-1500 Elecraft XV144 transverter combination, using a GPS disciplined OCXO on 116 MHz. I have documented the XV144 frequency stability and drift data comparing the GPS control against the stock crystal oven option with enhanced thermal insulation here https://picasaweb.google.com/114032640816757126398/XV144FrequencyStabilityModifications The stock FLEX-1500 TCXO is sufficient to hold the frequency to within 1 Hz. Enabling the 10 MHz sine wave external reference on the FLEX-1500 should increase the frequency accuracy and stability to the millihertz range. Carol, KP4MD *Bill Schwantes* bill4070 at gmail.com elecraft%40mailman.qth.net?Subject=Re:%20%5BElecraft%5D%20XV%20Transverter%20Local%20Oscillator%20--%20GPSDO%3FIn-Reply-To=%3CCAFyNi86U3UyF%2Bu2eTUX0oG3pE%3D7zXb0VgjbijP8_xzgZGxXh%3DQ%40mail.gmail.com%3E *Thu Oct 20 00:57:06 EDT 2011* - Previous message: [Elecraft] W2problemshttp://mailman.qth.net/pipermail/elecraft/2011-October/157966.html - Next message: [Elecraft] AF peak filterhttp://mailman.qth.net/pipermail/elecraft/2011-October/157969.html - *Messages sorted by:* [ date ]http://mailman.qth.net/pipermail/elecraft/2011-October/date.html#157968 [ thread ]http://mailman.qth.net/pipermail/elecraft/2011-October/thread.html#157968 [ subject ]http://mailman.qth.net/pipermail/elecraft/2011-October/subject.html#157968 [ author ]http://mailman.qth.net/pipermail/elecraft/2011-October/author.html#157968 -- Hi Guys and Gals, Does anyone know of a mod to the Elecraft XV transverters that provides for 10 Mhz GPS disciplined oscillator control of the transverter local oscillator? I think that would be a popular feature for Elecraft to consider on future versions of XV transverters. It would be similar to the K3EXREF Frequency Lock Option for the K3, which works flawlessly. Bill, W7QQ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
