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µBITX on 70MHz (4mtrs) UK/EU Band ?
#ubitxv6
70Mhz transverters are rather rare except for the new ones from Ukraine. On eBay you will find different vendors, each one claiming the originality of the product. Actually I gave once a try for a 432
70Mhz transverters are rather rare except for the new ones from Ukraine. On eBay you will find different vendors, each one claiming the originality of the product. Actually I gave once a try for a 432
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iz oos
· #90473
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BITX40 LED S-Meter
LEDs can be convenient for giving an idea of the SWR and maybe PWR. SG-lab microwave transverters have them and you have a clear indication of what is going on just watching two LEDs. LEDs that change
LEDs can be convenient for giving an idea of the SWR and maybe PWR. SG-lab microwave transverters have them and you have a clear indication of what is going on just watching two LEDs. LEDs that change
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iz oos
· #90361
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QRP story
My softrock RXTX for 15-12-10m delivers a little bit more than 1w on 15m and around 0.7w on 10m. It is excellent with my TenTec 2m transverter. TX audio is very good but depends on software settings a
My softrock RXTX for 15-12-10m delivers a little bit more than 1w on 15m and around 0.7w on 10m. It is excellent with my TenTec 2m transverter. TX audio is very good but depends on software settings a
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iz oos
· #90192
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SSB QRP
An IC-7300 will never be a QRP even running at QRP power. QRPs are the ones listed on https://www.eham.net/reviews/
An IC-7300 will never be a QRP even running at QRP power. QRPs are the ones listed on https://www.eham.net/reviews/
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iz oos
· #90179
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SSB QRP
10 watts are not too few even on SSB. An antenna with gain and a well shaped radiation pattern may make thing easier. However to me a compressor might help too: it increases average output and dependi
10 watts are not too few even on SSB. An antenna with gain and a well shaped radiation pattern may make thing easier. However to me a compressor might help too: it increases average output and dependi
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iz oos
· #90139
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A YO3DAC article to understand how an AGC circuit works and the difference with a VGA circuit!
#ubitxv6
#ubitx6-help
#v6
Loris, you are right! 50% of loss is a lot! If I used 500w, I wouldn't like to loose half of the power warming the climate... But 3db in RX is usually negligible and I find the ubitx (I have ver.3) se
Loris, you are right! 50% of loss is a lot! If I used 500w, I wouldn't like to loose half of the power warming the climate... But 3db in RX is usually negligible and I find the ubitx (I have ver.3) se
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iz oos
· #89869
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Talk: Does price buy Performance or Satisfaction in an HF Transceiver? by Frank Howell K4FMH
Satisfaction to me is being able to use and to exploit minimalistic HF rigs, render them effective beyond imagination. Apart from HF Signals, I really have fun with Softrock RXTX. What is missing from
Satisfaction to me is being able to use and to exploit minimalistic HF rigs, render them effective beyond imagination. Apart from HF Signals, I really have fun with Softrock RXTX. What is missing from
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iz oos
· #87965
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CB Amplified Loud Power Microphone for 4 Pin
#microphone
#ubitxv6
How many mV is the output of this mic? Does It have a compressor with clipping or just an amplifier?
How many mV is the output of this mic? Does It have a compressor with clipping or just an amplifier?
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iz oos
· #87755
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Linear Amplifier Build
Look at the schematics. Which CB amplifier is that? I would think to optimize the input and the output impedances of the amp (sorta of tuners), ferrites chokes at both the input and the output, effect
Look at the schematics. Which CB amplifier is that? I would think to optimize the input and the output impedances of the amp (sorta of tuners), ferrites chokes at both the input and the output, effect
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iz oos
· #87653
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Linear Amplifier Build
What about the FCC 15db gain max for the amps?
What about the FCC 15db gain max for the amps?
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By
iz oos
· #87645
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uBitx v.3 finals - negative feedback
Hello everybody. I have a version 3 of the uBitx. Is the negative feedback in the finals necessary or at least useful for the stability of the push-pull amplifier? I have seen the 26db 10w amplifier b
Hello everybody. I have a version 3 of the uBitx. Is the negative feedback in the finals necessary or at least useful for the stability of the push-pull amplifier? I have seen the 26db 10w amplifier b
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By
iz oos
· #87572
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SI4732 All Band Shortwave Radio
There are radios with the Si4735 instead of the Si4732. I don't really know the difference even looking to the datasheet. There seem a bit of confusion, at least to me, in the descriptions whether the
There are radios with the Si4735 instead of the Si4732. I don't really know the difference even looking to the datasheet. There seem a bit of confusion, at least to me, in the descriptions whether the
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By
iz oos
· #87332
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Music across all bands
#ubitxv6
#antennas
Does It happen with other receivers/trasceivers too? It might be MW transmitter nearby but also a local FM broadcast station. The low pass filter built into the Ubitx removes the FM broadcast of they
Does It happen with other receivers/trasceivers too? It might be MW transmitter nearby but also a local FM broadcast station. The low pass filter built into the Ubitx removes the FM broadcast of they
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iz oos
· #86159
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Questo gruppo mi fa schifo ! ... This group sucks me!
Please forgive him. Evidently he was mistaken in joining this group.
Please forgive him. Evidently he was mistaken in joining this group.
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iz oos
· #85963
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QUESTION for All - EASY BITX - HP 2800 series Schottky Diodes for Mixer
According to Franco Rota rfmicrowave.it It can be used as detector for applications up to 2 GHz, as mixer up to 1.5 GHz, often used also as RX input protection at HF and VHF thanks to its low capacity
According to Franco Rota rfmicrowave.it It can be used as detector for applications up to 2 GHz, as mixer up to 1.5 GHz, often used also as RX input protection at HF and VHF thanks to its low capacity
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By
iz oos
· #85354
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Ubitx and QO-100 sat
Great! I would like to know which transverters he uses and whether TX stability is fine or how is made acceptable. I had used in March 2019 a TS811 and a SGlab transverter, which was fine, but I would
Great! I would like to know which transverters he uses and whether TX stability is fine or how is made acceptable. I had used in March 2019 a TS811 and a SGlab transverter, which was fine, but I would
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By
iz oos
· #85291
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Ubitx and QO-100 sat
Hello everybody and HNY, Has anyone tried to operate QO-100 sat using a Ubitx? What a pity most operators in the US can't uplink that SAT!
Hello everybody and HNY, Has anyone tried to operate QO-100 sat using a Ubitx? What a pity most operators in the US can't uplink that SAT!
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By
iz oos
· #85230
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Multiband antenna, Tx and Rx
I believe the MFJ-915 current balun/choke/isolatori Is a good product, but but but I can I easily test it's effectiveness?
I believe the MFJ-915 current balun/choke/isolatori Is a good product, but but but I can I easily test it's effectiveness?
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By
iz oos
· #84517
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uBitx v5 issue
I am not totally sure, but that DC Path at the antenna input might provider some degree of protection in case of statics.
I am not totally sure, but that DC Path at the antenna input might provider some degree of protection in case of statics.
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By
iz oos
· #83951
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New to list
Before uBitx GDP was a good proxy for happiness.
Before uBitx GDP was a good proxy for happiness.
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By
iz oos
· #83860
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