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  1. Q900
  2. Topics

Gen 4 released

 

A new V4 Q900 is being released. ?It adds single antenna tx/rx on V/U via the sma connector, and hf/6m through the other connector. ?Also higher audio out for headphones and the 70 MHz band. ?

Also DMR fixed.


If anyone buys this and tests the functionality it would be nice to see what the results are. ?I’m curious as to whether dmr will work through hotspots and repeaters.
 

I would ask GOUHETEC why they don't just offer an upgrade to the version 3, but they never answer questions like that. Why spend all that money for a function that should have been there in the first place? Plus, what to do with the old radio? Junk it, as it's useless for half it's features or more.
--
Bob, KL7EAL Los Angeles
 

I’d put it more like it does 90 percent of what it is supposed
to do. ?I use mine a lot.
Brian C KJ7NYI
 

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Totally agreed.?
Looks good on paper, proof is in the pudding.?

Sincerely,

Brian


On May 7, 2023, at 10:35, Bob Dianetti <kt8dx@...> wrote:

?I’d put it more like it does 90 percent of what it is supposed
to do. ?I use mine a lot.

 

So are you going to buy another radio to be able to use VHF/UHF properly? What will you do? with the old radio?
--
Bob, KL7EAL Los Angeles
 

Just so you know, below is the link to the What'sApp group where the purchasers who are engineer-types are discussing the radio You can see that there are a lot of unhappy people over this radio:
111.jpg
 

Probably sell it. ?But I am using it successfully for in satellite operations using HRD for frequency control. ?The split antenna situation is actually a benefit as I have an LNA on the mast for 432 that feeds the receiver and I don’t need any fancy switching. ?And the QR 20 once I repair it I will probably sell. ?
 

Hello,

I have blown the finals on HF doing FT8 at full power. I don't think it was a SWR issue and anyway the RD16HHF1 can accept a 20:1 SWR for any amount of time without breaking?it also I had the SWR protection engaged at 2:1. I'd rather blame it to the poor thermal dissipation. The finals are attached to the drawer body without thermal paste and the ridiculously small fans just blow a little of air over the ATU section. This thing is not designed for 20W continuous work so beware of FT8 at full power. I managed to repair the finals but this is not an easy task more because you have to lift the top circuit disconnecting delicate riboon cables that are a pain to put back. Beware of fake transistors although I managed to find real ones on AliExpress moreover coming from the same batch so perfectly paired. Real ones have some little triangular shapes between the legs.

Brgds, Edouard F4EXB

On Mon, May 8, 2023, 17:18 Bob Dianetti <kt8dx@...> wrote:
Probably sell it.? But I am using it successfully for in satellite operations using HRD for frequency control.? The split antenna situation is actually a benefit as I have an LNA on the mast for 432 that feeds the receiver and I don’t need any fancy switching.? And the QR 20 once I repair it I will probably sell. ?

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
 

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
 

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=protonmail.com@groups.io> 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
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.
 

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
 

Yes, you're right... amateurs would do better!
--
Bob, KL7EAL Los Angeles
 

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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