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less power with CMP enabled 8 messages
Hello again, My radio is now built, working, calibrated (PA and IQ) as advised, tested. It seems however that voice compression effectively reduces final Tx power (instead of actually increasing it).
Hello again, My radio is now built, working, calibrated (PA and IQ) as advised, tested. It seems however that voice compression effectively reduces final Tx power (instead of actually increasing it).
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Wojtek SP9WPN
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My latest Rx Mixer Modds 5 messages
Hi Here My latest Modds for the Rx Mixer to avoid transmodulation with strong Broadcast radio signals and then reduce spurious signals on the spectrum. I am very happy with , i posted here just for di
Hi Here My latest Modds for the Rx Mixer to avoid transmodulation with strong Broadcast radio signals and then reduce spurious signals on the spectrum. I am very happy with , i posted here just for di
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Team-SIM SIM-Mode
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Noise 2 messages
Can we try an exttra roofing flter to limit local fm broadcasts not to interfere!! Rrgarrds Sarma vu3zmvv
Can we try an exttra roofing flter to limit local fm broadcasts not to interfere!! Rrgarrds Sarma vu3zmvv
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MVS Sarma
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Noise Floor 4 messages
Hello Guys! I'm wanna ask for help because my noise floor on the mcHF is pretty bad so far. For some reason one of the CBT3253 that switch the BPF went bad and I replaced both of them. I had checked w
Hello Guys! I'm wanna ask for help because my noise floor on the mcHF is pretty bad so far. For some reason one of the CBT3253 that switch the BPF went bad and I replaced both of them. I had checked w
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By
W5EGM
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mcHF vs Xiegu X6100 8 messages
Has anyone here had the opportunity to to compare these two rigs? Obvious differences are in the display size, gain control/s and built-in ATU, but what about hands-on? The mcHF has the benefit of bei
Has anyone here had the opportunity to to compare these two rigs? Obvious differences are in the display size, gain control/s and built-in ATU, but what about hands-on? The mcHF has the benefit of bei
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GI3TAC AF7CC Denis
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Displays
I have 2 HY28B displays, new. 2 I think work but not sure, and 2 3.2" displays, One new and the other I think works. $30 shipped. Pay pal is fine n5mf @ dfn . com -- Mark Flavin N5MF
I have 2 HY28B displays, new. 2 I think work but not sure, and 2 3.2" displays, One new and the other I think works. $30 shipped. Pay pal is fine n5mf @ dfn . com -- Mark Flavin N5MF
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Mark Flavin
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mchf and IMD HF Power output 20 messages
Hi all I measured the outlet of the mixer alone with U1 + BPF Filter + U2 CBT3253C. There are practically no traces of IMD on the HF (IMD <-60db). ( HMC482ST82 Mmic not connected ) After connecting th
Hi all I measured the outlet of the mixer alone with U1 + BPF Filter + U2 CBT3253C. There are practically no traces of IMD on the HF (IMD <-60db). ( HMC482ST82 Mmic not connected ) After connecting th
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Team-SIM SIM-Mode
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Amplifier keying - ACC - Grounded? 2 messages
Should the the ACC connector (outer ring) be fully grounded on TX? Mine reads150 ohm when TX and that is to high to key my amplifier. Is this a menu thing? How do you guys go around this?
Should the the ACC connector (outer ring) be fully grounded on TX? Mine reads150 ohm when TX and that is to high to key my amplifier. Is this a menu thing? How do you guys go around this?
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SM0NOR
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A short developed while tuning on 30m 2 messages
After weeks of field operation with my mcHF-with-autotuner, I was testing out a new antenna in my backyard when a few seconds into the third or fourth tuning cycle, the entire radio went dead. :-( I o
After weeks of field operation with my mcHF-with-autotuner, I was testing out a new antenna in my backyard when a few seconds into the third or fourth tuning cycle, the entire radio went dead. :-( I o
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Jeff AJ6IY
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Replacement RF Shield 4 messages
Hi everyone, Quite a while ago bought an mcHF kit including a case from m0nka. I am finally coming around to building it. I see that the instructions say that the RF shield needs to be manually modifi
Hi everyone, Quite a while ago bought an mcHF kit including a case from m0nka. I am finally coming around to building it. I see that the instructions say that the RF shield needs to be manually modifi
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Piotr Esden-Tempski
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Order Kit 11 messages
When can a kit be ordered again that you can further assemble yourself. I see that the kit is now sold out. Ben PA3EPQ
When can a kit be ordered again that you can further assemble yourself. I see that the kit is now sold out. Ben PA3EPQ
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bgsanten@...
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Version 7 Bypass cap values 4 messages
Anyone have the picture and values for the bypass capacitors on the Version 7 board? Here is the pic I have but I forget the values of the caps. TNX Chuck
Anyone have the picture and values for the bypass capacitors on the Version 7 board? Here is the pic I have but I forget the values of the caps. TNX Chuck
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Carl Horvath Jr
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incorrect power supply 4 messages
Hi everyone. I've been in trouble. With the radio off but with the power cord plugged in, to turn off the connected power bank I mistakenly switched the power bank from 12 volts to 24 and then back to
Hi everyone. I've been in trouble. With the radio off but with the power cord plugged in, to turn off the connected power bank I mistakenly switched the power bank from 12 volts to 24 and then back to
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salvo tati
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Magnetic Encoder
Hi, I have one magnetic VFO encoder for sale https://www.ebay.com/itm/144546546040 73! Alexey UT0UM -- 73! Alexey UT0UM -- www.mcHF.at
Hi, I have one magnetic VFO encoder for sale https://www.ebay.com/itm/144546546040 73! Alexey UT0UM -- 73! Alexey UT0UM -- www.mcHF.at
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UT0UM
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TX IQ calibration, 10mUp value 2 messages
Hi, New owner here :) My mcHF is now built, working, time for calibration! I've went through most of the items, however one puzzles me - it's TX IQ calibration for "10mUp" band. As there's a separate
Hi, New owner here :) My mcHF is now built, working, time for calibration! I've went through most of the items, however one puzzles me - it's TX IQ calibration for "10mUp" band. As there's a separate
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By
Wojtek SP9WPN
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What do you think about this HF preamp Modd to reduce intermodulation splutter 21 messages
Hello All Please did some one has tryed this hardware modification as chowen below in target to improve linearity of the Tx-Mixer + the HF-preamplifier and then reduce IMD intermodulation splutter ??
Hello All Please did some one has tryed this hardware modification as chowen below in target to improve linearity of the Tx-Mixer + the HF-preamplifier and then reduce IMD intermodulation splutter ??
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Team-SIM SIM-Mode
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CW paddle timing issues? 13 messages
First off, I should stress that my CW is still pretty weak, so it's hard to tell which of my problems are "the radio is doing something odd" and which are "the operator is a dope" - be gentle. :). Als
First off, I should stress that my CW is still pretty weak, so it's hard to tell which of my problems are "the radio is doing something odd" and which are "the operator is a dope" - be gentle. :). Als
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Jeff AJ6IY
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FreeDV mode Analog SSB still heard !
Just upgraded from old 2.7-version to latest 2.12. In the previous version in FreeDV-mode the radio is muted with no DV-signal present (of course). BUT in the latest version Analog SSB i still on in p
Just upgraded from old 2.7-version to latest 2.12. In the previous version in FreeDV-mode the radio is muted with no DV-signal present (of course). BUT in the latest version Analog SSB i still on in p
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Kenneth / SM0OHC
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mcHF 0.4 bootloader and firmware 7 messages
Dear mcHF friends! I would be very grateful if anyone please could give me some help to solve the issus I have! I have a mcHF with version 0.4 of both PCBs. I have done most of the sugegsted modificat
Dear mcHF friends! I would be very grateful if anyone please could give me some help to solve the issus I have! I have a mcHF with version 0.4 of both PCBs. I have done most of the sugegsted modificat
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Karl Jan Skontorp
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Achieving 5 W rms on the high bands 45 messages
Edited on 14 June 2021: The trade became quite long and difficult for a newcomer to read. The right answer was immediately given by Chuck ( https://groups.io/g/mcHF/message/2316 ) : "You should have n
Edited on 14 June 2021: The trade became quite long and difficult for a newcomer to read. The right answer was immediately given by Chuck ( https://groups.io/g/mcHF/message/2316 ) : "You should have n
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Gab IU0 OQM
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