Could you ask them if they provide schematic/service manual for that radio?
Thank you, Mike
Thank you, Mike
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Chierda S890 SSB
- Thread starter Shadetree Mechanic
- Start date
I have asked for the schematic and service manual from the factory representative and from the Alibaba store. We will see.
Simon has the manual.
simonthewizard.com
Simon has the manual.
More Chierda S890 Photo’s & Manual
Biggest and most sincere thanks to Matthijs CB Radio Netherlands for the radios manual Manual_Chierda_S890_ENG.pdfDownload All Rights Reserved (c) 2013-2023 Unauthorised Use / Or Duplication of thi…
simonthewizard.com
Quick update, service manual is not available. There will be a delay shipping my radio, there is a board revision to fix the RF gain and swr reading. Also I was informed that the $86 price for a sample was incorrect and Alibaba made a mistake in the listing. The price is supposed to be $125, but they will give me the low price since it was a mistake. I told him that I picked the radio because of the "AI noise reduce" feature. He said that feature was not available yet, and he didn't know when.
It is such an adventure dealing with foreign companies.
It is such an adventure dealing with foreign companies.
So, it's disposable radio. Pity.
Mike
So what is the word on when (date) the NR will be in place since the MENU is already there for it, kinda strange ?
Ford said that it would be available in the future, but couldn't tell me when. Their smaller handheld radios have that feature, so they know how to do it.
Quick update, I got the radio and am checking it out. It's an interesting little radio, stay tuned.
The Good:
The radio is actually smaller than I thought it would be, and that's a good thing. Looks like it would fit perfectly in an ammo can. The display is changeable to several different colors. It has great sounding receive, and the clarifier can VFO all over the place making this a great DX machine. The microphone is a good size and has AQ auto squelch, up/down, and mute buttons. It does 40w in all modes, even FM.
The Bad:
The TX audio is a little strange in that it has hardly any treble, and is bass heavy causing the sound to be muffled. This is really noticeable on AM, while on sideband, it sounds much better, but still muffled. The 4 pin mic plug is not the standard Ranger / Galaxy / Cobra, so I had to make an adapter. The stock mic is electret, so I put one of my telephone elements in it, but it made no difference. The radio itself is made this way. I went through my microphone collection and came to the conclusion that a power mic is really needed to wake this thing up. The Zetagi MB+5 really does a great job, and I even made contact with the Netherlands this morning with a great audio report.
Mic Pinout:
1 - Ground
2 - Audio
3 - PTT
4 - Function Buttons
The radio is actually smaller than I thought it would be, and that's a good thing. Looks like it would fit perfectly in an ammo can. The display is changeable to several different colors. It has great sounding receive, and the clarifier can VFO all over the place making this a great DX machine. The microphone is a good size and has AQ auto squelch, up/down, and mute buttons. It does 40w in all modes, even FM.
The Bad:
The TX audio is a little strange in that it has hardly any treble, and is bass heavy causing the sound to be muffled. This is really noticeable on AM, while on sideband, it sounds much better, but still muffled. The 4 pin mic plug is not the standard Ranger / Galaxy / Cobra, so I had to make an adapter. The stock mic is electret, so I put one of my telephone elements in it, but it made no difference. The radio itself is made this way. I went through my microphone collection and came to the conclusion that a power mic is really needed to wake this thing up. The Zetagi MB+5 really does a great job, and I even made contact with the Netherlands this morning with a great audio report.
Mic Pinout:
1 - Ground
2 - Audio
3 - PTT
4 - Function Buttons
Last edited:
Inside the microphone it has a board, with the foil membrane switches and mic element on one side, and the surface mount components and PTT switch on the other.
@ShadeTree Thanks for sharing your findings. Do you think the manufacturer would be willing to help you with the transmit audio? Maybe they could get you to some sort audio setting in the service menu.
@ShadeTree Thanks for sharing your findings. Do you think the manufacturer would be willing to help you with the transmit audio? Maybe they could get you to some sort audio setting in the service menu.
The pot marked
I will ask them and see what they say, it might be hard to convince them that there is an actual problem with it.
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