Re: 2.8 Mhz parasitic signal on 15 and 20m
#ubitx
any tips on how to test or mitigate? I have access to a very well equipped HF lab tomorrow.
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Thomas DD2TH
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#69954
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Re: 2.8 Mhz parasitic signal on 15 and 20m
#ubitx
Very strange issue. Final may be oscillating ?
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Raj vu2zap
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#69953
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Re: Power supply from a repurposed pc PSU
I can believe that,properly specified and designed in the era when items were of quality,not like today where there is little or no filtering.
Get Outlook for
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Ian Reeve <ian.radioworkshop@...>
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#69952
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Re: Power supply from a repurposed pc PSU
And it's an Antec as well. Antec power supplies have some of the best specs for low RFI emissions. I replaced a bad chinesium power supply in my desktop with an Antec and the background noise levels
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Thomas Sharka
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#69951
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Re: Power supply from a repurposed pc PSU
Repurposed computer power supplies are a excellent provider of a clean 12v supply and a few minutes work to add suitable connectors,it will do a grand job.
Get Outlook for
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Ian Reeve <ian.radioworkshop@...>
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#69950
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Re: 2.8 Mhz parasitic signal on 15 and 20m
#ubitx
Haha, Raj, He hasnt read our emails?
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Ashhar Farhan
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#69949
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Re: Power supply from a repurposed pc PSU
Neat set up there with the banana connectors.
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Jim
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#69948
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Power supply from a repurposed pc PSU
I needed a regulated power supply to run my mBitX and a couple arduino kits, but didnt feel like shelling out a hunderd + bucks. So I modified an ATX power supply from a dead pc. I get 3v, 5v, and 12
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rnharp@...
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#69947
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Re: 2.8 Mhz parasitic signal on 15 and 20m
#ubitx
the difference is constant, both when tuning and when changing band
it's a V3
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Thomas DD2TH
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#69946
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Re: Tuner? Well Sure!
I'm intersted in a kit as well (ZL2TUD)
I have been using OMRON? G2RL-1-E-CF relays for filter /antenna selection they are good to over 1kW CW and are relatively cheap differnt coil voltages are
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jk.futter@...
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#69945
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units EPROM memory allocation map?
Hi,
Is there a map of the ubitx EPROM memory somewhere that shows locations are allocated vs those that are "free"? As I am working on the 5" Nextion UX, it would be useful to store some values (e.g.
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Mark Hatch
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#69943
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SolderSmoke Podcast: Boatanchots, Antuinos, and SDR too
SolderSmoke Podcast #212 HDR, Boatanchors, SDR, Antuinos, Spurs, QSX, Mailbag
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SolderSmoke Podcast #212 HDR, Boatanchors, SDR, Antuinos, Spurs, QSX, Ma...
Radio
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Bill Meara
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#69942
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Re: V4 Raduino
WHICH MODEL IS IT FOR?
SHEP AA7MH
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mtngentleman@...
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#69941
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Re: #v5 finally got my V5 together and working, PA bias question
#v5
#ubitx
#pabias
Hi Dennis,
This seems perfectly normal to me.? My v3 (as delivered without and changes to the bias) on CW drew from 2A on 80m to less than 1A on 10m, on SSB with a microphone and a loud "hello" it
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Mark - N7EKU <n7eku@...>
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#69940
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Re: 2.8 Mhz parasitic signal on 15 and 20m
#ubitx
Questions!
1: Which uBitx model is this ?
2: Is the carrier to spur frequency difference constant in separation or does it increase and decrease as you tune ?
Raj
By
Raj vu2zap
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#69939
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Re: 2.8 Mhz parasitic signal on 15 and 20m
#ubitx
Which version of ubitx do you use?
By
Ashhar Farhan
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#69938
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2.8 Mhz parasitic signal on 15 and 20m
#ubitx
When I use SSB on 20, 18 and 15m, I get a strong signal (20db below the main signal) 2.8Mhz left and right of the tx frequency, as if the carrier is being amplitude modulated with 2.8 Mhz.
I already
By
Thomas DD2TH
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#69937
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Re: #v5 finally got my V5 together and working, PA bias question
#v5
#ubitx
#pabias
my setup is as follows, i have a bench power supply set at 12v usually flicks up too 12.1, antenna is plugged into a dummy load
I am seeing the increased draw on my bench power supply. Is this over
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Dennis KL4LG
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#69935
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Re: Bitx 40 - My Raduino doesn't look like the others
#bitx40
#radiuno
#bitx40help
Yes, you need to check the connectors for the rig you are using.
Easier for them to simply use one set of connectors as there is less
demand for the ones for the BIT40 now.
I will be making one for
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Wayne Leake
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#69934
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Re: Tuner? Well Sure!
I¡¯m planning to build a version of the K3NG auto tuner as well. I am looking at using a Sainsmart 16 relay module (Amazon $14.99) for the L&C and a 2 relay version for the hi/lo and antenna switch.
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John Faivre <wa9sgd@...>
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#69933
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