Re: boosting the power on 28 MHz
#ubitx
Just out of curiosity, what sort of power levels can be had with the finals wide open without doing the rest of the mod? Not that I am planning on doing that. Just wondering. Dave, WS1ETI
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docame12@...
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#48497
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Re: ubitx audio
#ubitx
Great looking case. I would suggest you calibrate the bfo first to see if that improves the audio. My ubitx bfo was substantially off from the factory. I used a pc and the spectrogram software to
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Michael Maiorana
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#48496
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Re: SWR
Tim AB0WR, and others... Peak power is based on a calculation from average power, or from a peak power (doubler) type detector. The Arduino provides capability to do that calculation, either from peak
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Arv Evans
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#48495
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Re: ubitx audio
#ubitx
That should be 45MHZ IF filter...
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Daniel Conklin <danconklin2@...>
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#48494
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Re: ubitx audio
#ubitx
Nice looking rig!? The KD8CEC software has a feature called ATT (45KHZ filter IF shift) that will do that, and it has a lot of other great features too.? Here's the
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Daniel Conklin <danconklin2@...>
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#48493
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Re: SWR
If they have no mike gain control, they might well be twiddling RV1 instead to get somewhat more uniform power output across the bands. Any forward power indication be it peak or average or somewhere
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Jerry Gaffke
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#48492
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Re: FT8 on uBITX experiences
Since we're on the topic of FT8 and other digital modes, is it common practice to use an online log?? I've been logging my voice QSO's in a notebook and just counting on the log file for WSJT-X for
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Doug W
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#48491
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Re: SWR
How are you going to get pep power on voice using the nano in order to set your mic level? How many ubitx users have even implemented a mic gain control? Not everyone uses an antenna that is perfectly
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Tim Gorman
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#48490
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Re: SWR
Yes, you want peak power to minimize distortion. But peak or average, some indication of forward power is better than none for this. If I have blown a PA fuse, I'd expect to see zero reverse power.
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Jerry Gaffke
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#48489
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Re: Thunderbolt and lightning, very, very frightening me
Great post. For anyone that would like to know how the pros do it, look up the Motorola rc56 manual. 73 K1AUS
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R. E. Klaus <reklaus@...>
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#48488
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Re: Thunderbolt and lightning, very, very frightening me
?Allison --- thanks, that is GREAT information..... ________________________________ Sent: Tuesday, May 8, 2018 4:53 PM To: [email protected] Subject: Re: [BITX20] Thunderbolt and lightning, very, very
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Gordon Gibby <ggibby@...>
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#48487
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Re: Thunderbolt and lightning, very, very frightening me
I've worked with shelters and all for land mobile.? They are ringed underground with rods and wires, same with surfaces and corners and then everything that goes into teh building is though a copper
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ajparent1/kb1gmx
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#48486
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Re: SWR
Jerry, Everything you mention has to do with forward power, not with SWR. And unless you can get the nano to read peak envelope forward power it isn't going to help much in setting the mic level to
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Tim Gorman
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#48485
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Re: Thunderbolt and lightning, very, very frightening me
"Verrrry good information. Can you point to a recipe with schematic and parts fully specified? If the antenna does take a direct hit, does it destroy the device? I find it hard to imagine that a GDT
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Gordon Gibby <ggibby@...>
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#48484
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Re: Thunderbolt and lightning, very, very frightening me
Here is an interesting video from a UK ham who went through a lightning strike. Quick summary, Unplugged equipment was damaged also. https://youtu.be/ABTyqL-8O_0 Marco - KG5PRT
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M Garza <mgarza896@...>
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#48483
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Re: SWR
Oh, there's no doubt it is a matter of personal preference. Still, SWR is kind of meaningless when you are trying to check out changes to a PA. Forward power is the meaningful measurement in that
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Tim Gorman
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#48482
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Re: Thunderbolt and lightning, very, very frightening me
Nope.. it's intended to bleed off static charge from nearby strikes and in the air during storms - just like a lightning rod. There are ways to handle a direct strike. They aren't within the
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Matthew Stevens <matthew@...>
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#48481
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Re: Low power output on ubitx
#ubitx
#ubitx-help
So I think I'm hearing that the power output I see is normal for this kit.? I'd like to see 5W on all bands for obvious reasons.? I'll be reading the threads to see if I can adapt it.? I'm sure
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richcarter03052 <re.carter@...>
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#48480
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Re: Thunderbolt and lightning, very, very frightening me
Ah, good. I may have to order some parts. There's lots of radio towers that somehow take direct hits. My best guess is they make sure they have a very attractive lightning rod up above any antenna.
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Jerry Gaffke
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#48479
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Re: Thunderbolt and lightning, very, very frightening me
Verrrry good information. Can you point to a recipe with schematic and parts fully specified? If the antenna does take a direct hit, does it destroy the device? I find it hard to imagine that a GDT
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Jerry Gaffke
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#48478
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