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Noisy RX on ubitx v5 16 messages
#ubitx-help
#v5
#bfo
#filters
#noise
Hi George, I would suggest looking at the S-meter while removing power to the PAM8610 amplifier module. I've also been playing with using a Class D audio amplifier in my V.4 uBitX, but so far I've not
Hi George, I would suggest looking at the S-meter while removing power to the PAM8610 amplifier module. I've also been playing with using a Class D audio amplifier in my V.4 uBitX, but so far I've not
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By
Jonas Sanamon
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AM Broadcast interferance 11 messages
#filters
#v6
You should figure out where in the circuit the station is breaking-in from. If you are hearing all the stations at once, it cant be breaking from the front end (it has two narrow filters). The other p
You should figure out where in the circuit the station is breaking-in from. If you are hearing all the stations at once, it cant be breaking from the front end (it has two narrow filters). The other p
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Ashhar Farhan
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How install Sotabeams Variable Bandwidth Filter inside uBITX V. 5 11 messages
#filters
#v5
#bitx20
Hi, Having seen your later message I now see you have the variable bandwidth filter. That should be very good, my filter is the one with 2 filters for CW - a less complicated filter. Judging by the pe
Hi, Having seen your later message I now see you have the variable bandwidth filter. That should be very good, my filter is the one with 2 filters for CW - a less complicated filter. Judging by the pe
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By
R. Tyson
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VK4PP Ultimate uBitx Daughter Board. 68 messages
#ubitx
#filters
#parts
Where do I find full info on this "Daughter" board? Steve/G4MJW
Where do I find full info on this "Daughter" board? Steve/G4MJW
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By
Steve Carey
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Filter Selections 2 messages
#ubitx
#v6
#ubitxv6
#filters
Thanks Reed for your input. I will stick to the external LP filter. I really appreciate your efforts in the V 1.5. Barry
Thanks Reed for your input. I will stick to the external LP filter. I really appreciate your efforts in the V 1.5. Barry
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barry halterman
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How to design crystal filter using NANOVNA 5 messages
#filters
#nano
A few months ago I tested a nice 10.7 Mhz crystal filter I bought years ago. Most likely I did damage it with a 7dbm dds, but I cannot remember exactly. Testing using an attenuator and Antuino in SNA
A few months ago I tested a nice 10.7 Mhz crystal filter I bought years ago. Most likely I did damage it with a 7dbm dds, but I cannot remember exactly. Testing using an attenuator and Antuino in SNA
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By
iz oos
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Crystal Filter Simulation 2 messages
#ubitx
#filters
Jonathan I appreciate your interest. Start with this article, let me know if you have any issues getting it -- https://www.arrl.org/files/file/QEX_Next_Issue/Nov-Dec_2009/QEX_Nov-Dec_09_Feature.pdf Th
Jonathan I appreciate your interest. Start with this article, let me know if you have any issues getting it -- https://www.arrl.org/files/file/QEX_Next_Issue/Nov-Dec_2009/QEX_Nov-Dec_09_Feature.pdf Th
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By
Curt
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For Sale: v4 board plus Axicom relays AGC and filter boards etc. 5 messages
#parts
#nextion
#v4
#ubitx
#filters
Thanks Dave for your interest. The Board and additional parts are on their way to you. Thanks for everyone else's replies. Best wishes Derek G4VWI.
Thanks Dave for your interest. The Board and additional parts are on their way to you. Thanks for everyone else's replies. Best wishes Derek G4VWI.
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By
derek (G4VWI)
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ubitx AM brodcast problem 4 messages
#bitx40help
#ubitx
#filters
#bitx20
#bitx20help
Maybe this? Have a look at Errors and learning with Bitx40 just a few topics down . . . F- Subject: I only received the audio from an AM radio. The frequency changed but nothing else was heard. Soluti
Maybe this? Have a look at Errors and learning with Bitx40 just a few topics down . . . F- Subject: I only received the audio from an AM radio. The frequency changed but nothing else was heard. Soluti
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By
John Sharpe
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Understanding ground isolation 4 messages
#ubitx
#teensy
#filters
Hi Rob, No problems. Ok for the regulator, that should work just fine. Regarding the place to insert the Teensy, here are my thoughts: If you have an AGC then before the volume control as you mentione
Hi Rob, No problems. Ok for the regulator, that should work just fine. Regarding the place to insert the Teensy, here are my thoughts: If you have an AGC then before the volume control as you mentione
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By
John (vk2eta)
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homebrew ubitx roofing filter 9 messages
#bitx20
#bitx20help
#bitx40
#bitx40help
#filters
I think you meant Mistakes are made by those who do things, but then even those who never do anything make a mistake by not doing anything. and it is so true. . _._,_
I think you meant Mistakes are made by those who do things, but then even those who never do anything make a mistake by not doing anything. and it is so true. . _._,_
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By
kh6sky
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Items For Sale uBITX V4 new -plus 4 messages
#filters
#ubitx
I was offline yesterday. Did these items end up being sold? 73 Mark
I was offline yesterday. Did these items end up being sold? 73 Mark
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By
Mark Hatch
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Auto TX Smart Filter Controller 15 messages
#nano
#arduino
#filters
#ubitx
Hi Woody, Thanks for your interest in the smart filter controller. As I answered your question via email, I'll include the core of the reply here for others that may have the same question. -------- I
Hi Woody, Thanks for your interest in the smart filter controller. As I answered your question via email, I'll include the core of the reply here for others that may have the same question. -------- I
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By
Tom, wb6b
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Axicom relay switching
#ubitx
#filters
This might have been posted before, so forgive me if doubled up, but an interesting web page on how to use Axicom rf type relays. http://www.i1wqrlinkradio.com/antype/ch97/chiave50.htm vk3pe
This might have been posted before, so forgive me if doubled up, but an interesting web page on how to use Axicom rf type relays. http://www.i1wqrlinkradio.com/antype/ch97/chiave50.htm vk3pe
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By
Glenn
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I captured my own PSK31 signal and it is not a pretty picture 9 messages
#ubitx-help
#filters
When I look at my transceiver output on transmit, I don't connect any antenna to my SDR dongle. I also have a 50 ohm SMA terminator that I sometimes connect to the dongle to greatly reduce the signal
When I look at my transceiver output on transmit, I don't connect any antenna to my SDR dongle. I also have a 50 ohm SMA terminator that I sometimes connect to the dongle to greatly reduce the signal
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By
Tom, wb6b
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Bandpass Filter Layout Design 2 messages
#ubitx
#filters
Bruce Possibly nothing is for sale yet, but note lots of effort around the world to improve this. One solution is a daughter board that hosts new output relays. Others are evaluating more substantial
Bruce Possibly nothing is for sale yet, but note lots of effort around the world to improve this. One solution is a daughter board that hosts new output relays. Others are evaluating more substantial
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By
Curt
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echo at 2 messages
#ubitx
#filters
I think the 45mhz filter mod can fix this. Maybe someone more knowledgeable here can comment. Joe
I think the 45mhz filter mod can fix this. Maybe someone more knowledgeable here can comment. Joe
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By
Joe Puma
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Low Pass filter inductor question. 17 messages
#filters
Carefully measured results were published on this forum. Construction: https://qsl.net/nf4rc/2018/OutboardRelaysDesignDocumentTry3.pdf
Carefully measured results were published on this forum. Construction: https://qsl.net/nf4rc/2018/OutboardRelaysDesignDocumentTry3.pdf
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By
...
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Clarification Please: SSB Purity on Each Band 2 messages
#ssb
#filters
#ubitx
#ubitx-help
20m is about the best.
By
...
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FYI - a DIY source of some nice stuff.. 2 messages
#calibration
#filters
#parts
He's got some unique, properly designed, well documented stuff there. Jerry
He's got some unique, properly designed, well documented stuff there. Jerry
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By
Jerry Gaffke
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