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This is what I was given
1. Updated the KAY1 error in the first line of the CW automatic call, and updated it to KEY1. 2. Solved the problem that V4 occasionally cannot receive signals when switching modes.
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On Jul 3, 2023, at 14:20, alansmith@... wrote:
?Is there a change log for this update?
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Erik Carling G0CGL / EI4KF
I am sorry to hear of your blown finals, Edouard. You did well to repair them, something that would be beyond the competence of most Q900 users.
Here I have the Q900 V4 and I do like using the FT8CN FT8 app. But before finding your message, I had been wondering if the finals were delicate in this radio. I wonder if you problem is an isolated one or common. My own FT8 operations have been only for short durations because I fear of the possible failure.?
If anyone has any other experiences to share about FT8 on the Q900, please let us know.?
73 de Erik EI4KF
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At first, I thought how cool it was to have two fans, although I never got to the point of even testing the airflow to see if it is a "crossflow" design, which constantly empty the case of hot air. I must have blown my finals immediately because of the confusion over what antenna connector is for what...
To now learn that the heat sinking is inadequate only reinforces my opinion that the whole radio is produced by amateurs who don't have a clue how to bring a proper design all the way to market and succeed.
It was a good idea in the beginning,? though!
--
Bob, KL7EAL Los Angeles
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Heatsinking of the radio should have been on top of the case and never at the bottom. Bigger fins would always help in dissipating heat more efficiently. Size of case should not be the primary choice in design.
On Sun, 6 Aug 2023, 22:16 Robert G. Aldrich via , <dailyrushes= [email protected]> wrote: At first, I thought how cool it was to have two fans, although I never got to the point of even testing the airflow to see if it is a "crossflow" design, which constantly empty the case of hot air. I must have blown my finals immediately because of the confusion over what antenna connector is for what...
To now learn that the heat sinking is inadequate only reinforces my opinion that the whole radio is produced by amateurs who don't have a clue how to bring a proper design all the way to market and succeed.
It was a good idea in the beginning,? though!
--
Bob, KL7EAL Los Angeles
--
Richard 9H1RF
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Erik Carling G0CGL / EI4KF
The witty response Bob is amateurs would do a better job (radio amateurs of course). Some people love the Q900, especially V4, but I am skeptical of the longevity of the unit. I am now using mine outdoors portable only and at half power if on FT8 into an amplifier. It still gets warm though. It should "be cool" to have two fans but it is not cool in the literal sense. I think, as you say Bob, the design is not optimum.
Erik EI4KF.
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It seems to me that the approval of the final design may have come from some satellite guys in their group. Thus the unusual antenna configuration. And how does the radio receive up to 2 gigs? Is it even sensitive at that range?
-- Bob, KL7EAL Los Angeles
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Yes, you're right... amateurs would do better!
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Bob, KL7EAL Los Angeles
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Where does the cw key plug in to the tbr? ?The manual says the jack is on the back but the battery is there.
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Bob you need the data cable that you use to upload the binary. It will power the keyboard. It plugs into the data port on top of the radio.
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On Aug 9, 2023, at 15:02, Bob Dianetti <kt8dx@...> wrote:
?Where does the cw key plug in to the tbr? ?The manual says the jack is on the back but the battery is there.
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For everyone’s awareness,
I’ve been underwhelmed by GHterminal as a programming tool, therefore filed a ticket to have it supported by CHIRP.
If you support this idea, please let them know. ?Would love to have good software support for this radio.
Thank you,
Nick?
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No body forces to buy this Q900 transceiver
I have one and like it and breaking down? I still remember the FT-100 and the IC-7000 both had these transceiver and they broke down...
73
Biton, m0wao
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Can anyone explain the "CMP" control on the AF menu?? The manual's "MIC companing ratio" description doesn't help me much.? Any suggestions on its best setting for SSb voice and for FT-8?? Thanks in advance!
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Nick,
I added to your Chirp request the following blurb:
"I also think this radio needs Chirp support. It is an all mode SDR that transmits from 1-74MHz with an internal tuner and 74-1.2GHz or 74-2GHz depending on the model (version 1,2,3,or 4). It also has optional modules like DMR , GPS, Compass, and LoRa. Link
to main radio page:
The Guohetec Q900 programming software and images (saved as JSONs) are all compatible with the following radios (there may be more, because it is all basically the same hardware packaged and sold under different names:
Guohe Q900 (versions 3 or 4)
Radioddity QR-20 (ver 2)
Ailunce HS2 (ver 1)
Hamgeek Q900
Hamgeek PMR-171 (manpack)
Hamgeek PMR-119 (manpack MilSpec)
Guohetec TBR-119 (manpack MilSpec)
The normal programming software is called GHTerminal and doesn't need to be installed, just run the standalone .exe file and use whatever directory as a repository to store the file output (JSONs).
You can download 'GHTerminal PART1.rar' which is the only part of the 3 parts you need (I think) from this link:
You can also download all the manuals, software (lots of companion apps), and the firmware from that site. The Bluetooth controller Android app works surprising well."
If they want I can actually upload the GHTerminal software for them. I may do that at a later time.
-Damon (K9CQB)?
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For everyone’s awareness,
I’ve been underwhelmed by GHterminal as a programming tool, therefore filed a ticket to have it supported by CHIRP.
If you support this idea, please let them know. ?Would love to have good software support for this radio.
Thank you,
Nick?
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When running FT-8 or JS8-Call, my CAT control periodically disconnects.? Usually a "retry" or toggling of IFG in the RF menu reconnects.? I'm pretty sure my Windows 11 laptop setup is good, and I'm using a high quality, "IF certified" USB cable with chokes at either end.? I'm keeping the radio 3' from the laptop.? Anyone else have a similar issue, or thoughts on a solution?
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Not sure;
CMP -> Compressor / Limiter?
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Recommended GPS Antenna for Q900 (v4)
I purchased a Quohetec Q900 v4 with all modules (GPS, DMR? and Compass). When I received it, it didn't have a GPS antenna. I contacted the seller and they responded that the Q900 with GPS module is no longer includes a GPS antenna. The manual simply states that it should be an "active" antenna. Seaching Amazon I see many active GPS antennas with a SMA connector. They all seem to require 3-5 volts.
So far I haven't been able to obtain any information regarding what GPS antenna specifications are required.
Does anyone have a GPS antenna that works properly on a Q900 v4 or what antenna would be recommended.
Chris - KE8VOD
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Re: Has anyone found the manuals yet?
This looks to be an older manual or maybe the vendor hasn’t updated it.
I was looking for the pin assignments for the Q900 mic, which says it has 3 poles on the plug, yep the plug has 4 poles.?
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Re: Recommended GPS Antenna for Q900 (v4)
I simply added an SMA antenna from an old home router. That did the job. The antenna is receiving signal only so it will be very easy to add.?
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On Aug 25, 2023, at 14:16, Chris Groman <cgroman@...> wrote:
?I purchased a Quohetec Q900 v4 with all modules (GPS, DMR? and Compass). When I received it, it didn't have a GPS antenna. I contacted the seller and they responded that the Q900 with GPS module is no longer includes a GPS antenna. The manual simply states that it should be an "active" antenna. Seaching Amazon I see many active GPS antennas with a SMA connector. They all seem to require 3-5 volts.
So far I haven't been able to obtain any information regarding what GPS antenna specifications are required.
Does anyone have a GPS antenna that works properly on a Q900 v4 or what antenna would be recommended.
Chris - KE8VOD
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Amplified microphone project for the Q900
Since the Q900 has problem with modulation especially on FM, I looked for an amplified mic. The procomm mic that works well with, is not sold in Germany or many other countries. The mics I found where expensive.?
I decided build my own amplified microphone with parts I found online. I don't mind improvising and I have fun building stuff.
Here is what I came up with so far. I tested the mic amp module successfully NFM 2m and got a good feedback after a quick QSO. But everything still has to be put into a housing.
The mic amp module has a DC offset. I decided to use a decoupling capacitor. But what value should I take? I don't have experience with mic amps and inputs. Also the potentiometer is needed to lower the output signal. Is 10k ok? It works with the Q900 but what are usual values?
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Robert G. Aldrich
Nick (N3CNO)
bitmanEV m0wao
Damon Schaefer
Chris Groman
