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HF FULL BAND ver 2.5 w/ HF amp & audio PREAMP - Quansheng UV-K5 Modification (Si4732) - Overview
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- Опубликовано: 22 июн 2024
- We overview the new version of the HF FULL BAND Si4732 modification board for the Quansheng UV-K5, this new board has HF amplifier for the AM and SSB, plus the audio PREAMP. Separate antenna for AM/SSB & FM. But if you already have version 2.1 should you run and buy this brand new version 2.5?
#quansheng #quanshenguvk5 #uvk5 #uvk6 #fullband #si4732 #hamradio #modification
Thank you very much for your modifications videos! I am old time electronic hobbyist but now in my sixties i am learning so much about new soldering technology from you! Lot to learn about SMD. Spasibo!
If you look closely to the right of the FM part were the capacitor was replaced. On the mod to the left of the oscillator it’s marked with an R and you can see they have a variable tuner resistor pod in place. Maybe to tune it better? But the simpleton instruction picture just says to put a jumper in that area.
R = reset. It goes to RST pin.
great video. love your style as well as the content itself
I finally got the board and installed it in a new radio. I didn't change the capacitor or the supplied inductor - It's just for the FM broadcast FMI pin #6 of the new Si4732 radio chip and FM audio is too loud and distorted to listen to anyways. I didn't remove the capacitor and inductor that went to the old 8 pin FM chip input pin 6. The length of RF cable supplied is perfect without cutting it to have the antenna connector mounted on the chassis and then plugged into the circuit board. Overall, it was an easier install than the previous version boards.
How's signals on 7090 - 7150
@@codernov I just tested it using a proper 50 ohm antenna splitter and variable attenuator on my inverted V antenna and the same signal off air split to the Quansheng and my Icom IC-735 and they were performing the same or even better.... I'm very pleased. Not impressed with the BFO step performance though. Takes too long.
Another great video man !
@15:10 and the coax wire needs to be on the other side against the plastic or it will hit the ribbon cable. But I can’t say for sure my self yet, still waiting for this exact part and version of the mod that I ordered two days ago. I dont do many videos myself these days. But if you want some pics or videos just reach out to me and I’ll do some when I install this version.
Coax on the side of 3.1 mil jack, and you glue it, just like in latest video
Thank you for this version's review
Version 3 in a month or so?
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I'm learning towards the single antenna mod. I have not found a youtube showing any difference between the a dedicated antenna for HF. The choke that is installed under the display to the far side along the side of the radio, is that there to allow HF on the same antenna port as the VHF/UHF? Of all the si4732 mods for single antenna, is there one any easier than the other for installation?
Check out DS5WIS's channel for such tests for now. Next I'll be doing ver 2 without preamp with single antenna, specifically for testing. Then testing, and then after testing dual antenna. But you'll have to wait for it, I'm kinda over the top of my head right now, things just coming up.
И эту заказал ! хотя 2.0 еще не пришла :)
Я не буду эту заказывать. Мне фильтры не понравились. Подожду месяц второй, может ещё что-то появится.
Погляди тест ruclips.net/user/shortsaH7C9a3aVYY
Holtsen is from Germany I think. In any case not from Holland, amigo.
Would you say after this mod, the radio performance on HF is as good as some of the portables under $100
Here is test ruclips.net/user/shortsaH7C9a3aVYY
@@codernov If I watched it correctly, with amplifier was worst than no amplifier on 7.496MHz station ? If that is the case, why would the 2 antenna system
be better for HF?
@@n1kkri Perhaps because inside city there is a lot of crap on the air like FM broadcast stations, etc, which give noise. So inside city best without HF amp. More testing needs to be done outside city, where there is no radio noise. My city is looooongest in the world, Sochi yo, so for me it's testing done in mountains. Why 2 antenna or discrete antenna is better? Because you don't get anything else on input, just antenna + filter on Si4732 board.
Version 3 has filtering
Version 3?
How About A Link For The V.2.5 Part? Thanks...
aliexpress.com/item/1005007201699291.html
aliexpress.com/item/1005007208202205.html
aliexpress.com/item/1005007207854725.html
So I guess you not going to wait for version 3?
Be sure to get EEPROM with it, so you can run @fagci Reborn WFM SI SSB firmware. Part is M24M02-DRMN6TP
@@codernov Has anyone received that version yet? I ordered one a week ago and it has yet to ship . Ordered a radio at the same time and just got it. I placed order from another vendor and it says shipping in 9 days! WTF?
@@halohms I haven't even ordered it. Just publishing a vid right now. Watch it. It's about HF amp.
@@codernov I did watch it and that's why I ordered it. The original V1 type board without the audio amp came here in 10 days from China. I ordered the v2.5 board over a week ago and it is still hasn't shipped. So are they actually in the field yet?
@@halohms Could be could be. My 2.1 war coming almost a month. Could be they haven't received from factory yet.
I the radio fully functional after the mod?
Fully functional is a stretch. To listen to FM radio you need a special firmware, either CEC_0.51 or Reborn_WFM_SI_SSB. Other than that, everything is functional.
Will this work for the k6?
k5, 6, 99, whatever, they all the same only different plastics.
Why don’t you spec your own mod kit. Source it in china and sell it