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Re: UBitx LSB to USB change
In addition to a function switch, probably want to also remove C91 and C92 as mentioned in Allard's operating instructions.
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On Sat, Jun 10, 2017 at 08:33 am, Jerry Gaffke wrote: Allard's sketch flips between LSB and USB by moving the VFO from low side (5mhz) to high side (19mhz) of the 12mhz intermediate frequency. ?That seems to work fine and is the easiest to implement (just update the code on your Nano and add a Function button). ?There are at least three ways to flip between LSB and USB operation.? |
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Re: UBitx LSB to USB change
There are at least three ways to flip between LSB and USB operation.
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Could drive the BFO from CLK0 of the Si5351 as mentioned here by Allard (but not yet implemented in his sketch): ?/g/BITX20/message/27021 This gives several advantages: Calibration can be more accurate, BFO can be easily placed properly with respect to the IF filter passband, and provides a way to implement various diagnostic aids. Could add capacitance at C103 to move the current analog BFO ?to the other sideband. Allard's sketch flips between LSB and USB by moving the VFO from low side (5mhz) to high side (19mhz) of the 12mhz intermediate frequency. ?That seems to work fine and is the easiest to implement (just update the code on your Nano and add a Function button). ?In this case the BFO frequency does not move, the sideband inversion occurs because we are now subtracting the RF signal from the VFO, not adding the RF signal to the VFO, when creating the IF signal. Jerry, KE7ER On Sat, Jun 10, 2017 at 07:44 am, JuanCarlos Berberena Gonzalez wrote:
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Re: cw speed
Thanks Raj. You reminded me that I also used to do the same. I also used to wire a small lamp with a 4.5V battery (flat battery pack with 3 cells. who remembers them) and used to read the morse from the lamp. Regards Lawrence On Thu, Jun 8, 2017 at 4:55 AM, Raj vu2zap <rajendrakumargg@...> wrote: Good advice from everyone! |
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Re: add yourself to the new BITX operators map
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Seeing the topics for regional operator lists got me thinking.? If words are good, pictures are better.? I set up a google map that you can add yourself too to help visualize where everyone is located.? I was going to add people that responded to the other topics but out of respect for privacy (and my laziness) this should be entirely opt in only.? The map is only accessible with the link below.? The interface is reasonably intuitive but I will do my best to explain how to add yourself. |
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UBitx LSB to USB change
Hi Colleagues, the best for all.
Farham a question for you.
What is the best option to change the side band from LSB to USB and vice versa if I want to use my rig in PSK or other mode I need.
I understand it can do for itself do when you change the band, but I want to do for myself if I need it.
I am working with the Raduino using the 3 output in Rx with the ANGARA and the performance is ok
I have changed the side band changing one of each oscillator and no problem with it, but I consider the VFO configuration is not the best one.
Qrv's 73's Jc |
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Re: add yourself to the new BITX operators map
Jim,
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Switch to topic view and make things easier on yourself /g/BITX20/topics the map is at Sat, Jun 10, 2017 at 07:18 am, Jim Schliestett wrote:
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Re: add yourself to the new BITX operators map
Jim Schliestett
¿ªÔÆÌåÓýWould someone please provide the link to the map again. Thanks ? From: [email protected] [mailto:[email protected]] On Behalf Of Doug W ? A few housekeeping items: |
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Re: add yourself to the new BITX operators map
A few housekeeping items:
I did some more research and you do need a google account to add yourself or edit.? It appears google just assumes the entire world has an account so share with everyone to them means everyone with an account.? Again, if you do not have an account or can not figure the page out just email me or reply and I will add you. I have deleted any added layers and added those operators to the main layer.? Please only add yourself to the main layer.? If you don't know what this means I will help you. A few operators added themselves only by address.? Where I could I looked up your call sign and added that.? Please edit if this was not your intention. One user added only their call sign as a layer with no location.? I moved you to the main layer and located you at the university in Southern India as that was the only thing that came up on google.? Please edit if this was not your intention. Something interesting you may not have noticed.? There is a ruler icon under the search box.? You can use that to measure the straight line distance from icon to icon. If you want to play with the data, there is an option to export to a KML/KMZ file. After reading the other comments regarding differentiating stations, I think we should stick to only things that will help us as operators.? I am all for adding as much of a description as you would like to tell us about your station and yourself in the description box but I am not sure that there is any standard icon designations that will help us.? I am totally open to ideas on this if anyone has a suggestion for a color scheme or different icons that at a quick glance will help you as a BITX operator reach other BITX operators.? I don't claim to be the master of this thing.? I'm just the guy that clicked the map page first. |
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Keeps getting better Bitx40
philip yates
Thought I would add the VK3YE AGC.
Anyway after several hours of pondering over the strip board built non working AGC, I had a call from Wife... can I take? fresh towels down to the beach for the Grad kids. Got back, fresh eyes, transistor pinout I had found on the web was wrong. Swapped the round, and all seems to be nicely working now, I even attached the re-claimed S meter from an old Trio transceiver. Alls works well now, just have to make a better PCB up for the final build, and add the external pot and bypass switch. This bItx40 just keeps getting better, could take a while to get it into its case tho..... Phil - G7BZD |
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Re: Putting Leftover Holiday Items to Work
Jack Purdum
I didn't even know peppermint could bark, let alone store it in a can! Jack, W8TEE From: Michael Hagen <motdog@...> To: [email protected] Sent: Saturday, June 10, 2017 9:48 AM Subject: Re: [BITX20] Putting Leftover Holiday Items to Work And in that case the RF can recirculate round and round like a
cyclotron!? You may get some Gain?
On 6/9/2017 9:13 PM, Guy N7BIR wrote:
Nothing quite like Trader Joes's to satisfy your electronic needs.? |
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Re: Putting Leftover Holiday Items to Work
¿ªÔÆÌåÓýAnd in that case the RF can recirculate round and round like a cyclotron!? You may get some Gain?
On 6/9/2017 9:13 PM, Guy N7BIR wrote:
Nothing quite like Trader Joes's to satisfy your electronic needs.? |
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Re: Standoffs for mounting the board
John P
For your reference, .
I'm not sure of the wisdom of actually using the drill press under power to complete the tap. You really don't want to go much faster than you could by hand. Not sure how thick the box metal is, but a little cutting oil (or any oil if you don't have cutting oil) saves a lot of wear and tear on both the box and the tap. -- John - WA2FZW |
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Re: BITX40 package size
I'm not certain that I reversed the polarity - I just assumed that that was the case as I do have a track record, however I thought I had been quite careful. I'll trace the leads through again when I get some time - I'll also look for any solder bridges etc on the board
thanks for your help - fingers grossed the whole board isn't fried! Matt 2E1HNK |
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Re: Other 2 line displays
philip yates
Thanks for the info, I find some colours easier to look at, age I suppose plus other problems. Now I know what to look for. Many thanks. Phil - G7BZD On Sat, Jun 10, 2017 at 3:57 AM, John Smith via Groups.Io <johnlinux77@...> wrote: I got this one. They took so long I asked Ebay to step in. It arrived at the very last moment. Then the replacement they sent on their own came two weeks after that. Now I have two. |
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Re: Standoffs for mounting the board
N7PXY
The important things to keep in mind when tapping are;
1.? Drill the correct size hole for the size of the thread. 2.? Keep the tap perpendicular to the surface. Here the drill press will help you out. Simply chuck the tap firmly but loosely in the drill press and use it to align the tap while turning the spindle by hand to start the tap. After the first 3 or 4 turns then switch to a tap handle to finish the threads. If you have some experience you can use the spindle under power to do the threads. I do it often. 3.? M3 is a common size for this chore using that size will leave you with a tap that can be used to chase threads and make repairs to other threads. 6 mm, 9 mm, 12 mm and 24 mm are all very useful with 6 mm being the most useful. PJH, N7PXY |
JuanCarlos Berberena Gonzalez
Matt Carus
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