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Just the assembled board, nothing else. So if you doing single antenna you'd need 100 nF cap and a choke

I think they already are on Ali

They have version with upgraded EEPROM on ali. No sure about the Si. In Russia I offer on our local ads site avito services for modification. If I was in the U.S. I'd offer those services on eBay.

@@gl0sek Amazon much quicker for me. I get stuff worst case in 2 days.

@@codernov I would like to see a link for the upgraded version with upgraded EEPROM too.

I'm sorry, I did find a modded K5 mobo on ali, if we look at pic display and everything with SI installed. I personally wouldn't buy it. But that's just me. Here is the link aliexpress.ru/item/1005006911464932.html

Install v1

​@@codernov would it be possible to map all the connections to the preamp and add it on a diy board? You already measured all the components so people with v1 would only need a schematics to make an upgrade themself.

@@gl0sek It's an audio preamp using LM321 opamp. Yes. But hell no. One of those situations where you better off buying the board. Don't worry about the version. They already come out with another version, Koreans have video with that one. Version 1 is good, just use it. All you have to do, where audio exists, there are two resistors, short one of them for extra loudness.

@@codernov with version 1 and a new eeprom what firmware would be best?

@@gl0sek With CEC you won't get anything from new EEPROM. It don't supports it. Only fagci Reborn supports it at the moment. Reborn is kinda in alpha stage, but it is usable, plus we going to finish it soon.

Originally they were shipped with cheap 1mH 1/4w. You can replace it with 1/2. Not sure about 1.5mH, probably not. But people found out that these chokes are high ESR and they get hot when you transmit. So there is now a better option. There is a pinned comment to this video, with time marks for the video, table of contents. Reply to that comment is the needed choke and everything else. Check it out and get that one instead. It is NLV32T-471J-EF, 470 мкГн, 1210, 5% high freq and low ESR choke. If you doing single antenna get that one for best results.

There is a link in pinned comment to this video. Otherwise you search ali for quansheng si4732

I don't know the volts. They should all be 3 volts though. Size that I used is 020, but that's only because I had 020 for display. Any size that fits will work. The one I used is side glow, used to change display color.

@@codernov thank you for answering me. As I looked through my toy box of electrical parts I noticed that some of my leds had different voltages especially based on the colors. So thank you again for your thorough videos including the struggles people may encounter doing their radios. God be with you!

You need low ESR high frequency choke, get NLV32T-471J-EF It is 470 micro henry. Not sure about ali, maybe there is. But sites like Farnell, Mouser, DigiKey, ChipDip, and other electronic components sites carry it. Reason you want this choke is because with regular choke you get parasitic losses while transmitting, some people even managed to burn it. It gets hot.

DUAL antenna: Start by making a hole for SMA, insert proper SMA (link in pinned comment here), make it flush. Break 4 legs, cut center pin. Next remove RD1080, coil and cap next to it, and cap on ANT input. Solder in FPC board. Make jumper for enable pin. For dual antenna jumping cap is not really necessary. Install IPEX connector. Optionally jump one of the audio resistors. Now remove board from metal base. Remove flashlight LED. Stick board into body, make sure your SMA is flush. If flush, cut pigtail to size, solder pigtail to SMA. Mask SMA. Reassemble.

You reset eeprom every time you install firmware. It sounds like firmware is not communicating with Si4732. Recheck your soldering. Make sure you use flux. I had someone show me pic of their job and it was soldered without flux -- oh why don't it work, I'm ready to buy a new one, he said. Flux man. Flux makes solder flow. Without flux you have no business soldering. Because soldering does not happen without flux. You have to recheck your work whether you used flux or not, because from your words communication between Si and radio does not happen.

Appreciate your prompt response @@codernov, I did indeed use flux before soldering. Thanks for confirming that the eeprom get reset with firmware update. I was wondering if something's corrupted there and if I could reset it somehow. I must say, I love watching your videos 🙂 It's become an addiction now and I wait for the next one eagerly to see your cool projects. And you have some superb soldering skills. It's more an art how you go about doing it, it's so much fun to watch 🙂

Just for completeness, the issue I faced was with the patch board being defective. I happened to have a version 1 board which I used instead and the radio works fine on HF. I suppose it's pot luck with these things.

High cloud, same as Eakins, same as Amscope, 7x-45x trinacular.

Forgot to mention....CEC 0.51

Which PCB man, Si4732 board or quansheng board? If latter, look at x-rays, there are x-rays in video description, anyway, there is + from battery and ground near it. If it worked for you, cool, but that's a risk, don't do it again. Plus you haven't measured power consuption before you cut and after, maybe it consumes more power after you cut it. Anyway, on my channel we do things more or less properly, if something we do improperly that would be educated and calculated risk, like examining x-ray images, etc.

Tell me which antenna you using. None youtube link you won't be able to shoot here, so if you could contact me, I'd appreciate it. I'm looking for a good and affordable antenna.

@@codernov I will write you a PM ;)

Well I have the overview video of this board - th-cam.com/video/aXHe2JjNlyg/w-d-xo.html What happens if you jumper after cap and then short that cap with tweezers?

​​@@codernovthanks for the link to the other vid, i see you measured the incoming signal components, but do you happen to have the capacitor value of the first capacitor that comes from the audio out of the chip? For your test, it works, but that is pretty much same as direct connect I think

@@brianl2607 It proves that there is connection between LOUD ROUT and capacitor. How about if you don't jumper anything and just short that cap. Do you get sound through that amp? I installed the mod, and taking out anything is not an option.

@@codernov Ahhh i see... good thinking. so if i short the cap it doesnt work. basically the only time i get audio is anywhere before the first cap and anywhere after the last cap of the amp. i feel like i may have a short circuit simewhere in the preamp

@@brianl2607 Perhaps I could do a video later this week about the pre amp. I won't be taking out components, but I could measure them in circuit, for what it's worth.. Look, you should jumper after the amp onto 8 leg. After amp you have cap, right after that cap. That way you eliminate the possibility of trace from that last cap to 8 leg being broke.

Будет

@@codernov хорошо, ждем !

There is pinned comment to this video, links to all parts used including the v2.1 board are there. If any of those links are broken, let me know.

If you turn it off and press and hold PTT and then turn it on, flashlight should turn on. If not, that means one of the buttons is sticking.

@@codernov yes flashlight work when press ptt and turn it on. Factory service also. Tx/rx work on vhf/uhf but firmware doesn’t want pass hf mode when I press on the 0 button. I don’t understand what is the problem. I Check all the bip bip as you. ??? Radio and screen blocked

@@1cristojojo1 Someone had this same thing happen to them. That means you have to check your work carefully.

The firmware will hang if it can't communicate with the Si4732 - check your soldering and also check that you haven't accidentally displaced and of the tiny SMDs near where the board attaches.

NLV32T-471J-EF high freq low ESR

The purpose is to inspire average guy. It's much easier to get guy like that to flick or cut or buy low melt, than to buy a sucker.

@@codernov Yes I'm inspired to try a board on my Radio myself but I'll remove components with a sucker. You can lift a chip off of a board in less than 10 seconds that way with no mess...no solder flux...and no clean up needed afterwards. I never use a cleaning spray because the sucker removes everything. OK it takes practice to get the hang of using a solder sucker but that's what professionals use and that's how they get to be pro. Fast, clean and no damage to the circuit board or the component itself..you can reuse it if you want to.

@@Technician4444 Make a video for us how you lift the RD1080 with sucker.

You mean the booger sucker? Tossed that in the trash 30 years ago.

Much greater sensitivity.

Thank you for watching to the end, you trully are a legend 👍

Choke for single antenna dudes: Use hi-freq low ESR choke NLV32T-471J-EF, 470 мкГн, 1210, 5%, available on eBay, ali, Farnel, DigiKey, Mouser, ChipDip: www.chipdip.ru/product/nlv32t-471j-ef-470 Parts used: (if links are broken, let me know) HF FULL BAND Mod. ver. 2.1 - aliexpress.com/item/1005006856416248.html Pigtails, 20cm w/ IPEX - aliexpress.com/item/32909354468.html IPEX connectors - aliexpress.com/item/1005004590059018.html SMA-F, 18.5mm, get two - aliexpress.com/item/1005002371533134.html Y BNC-K to SMA-J & Y BNC-K to SMA-K, gold - aliexpress.com/item/1005005558908508.html SMA dust cap - aliexpress.com/item/1005004722805731.html 50 ohm BNC load - aliexpress.com/item/1005005558967410.html 27 MHz antenna - aliexpress.com/item/1005006651159908.html RH770 antenna - aliexpress.com/item/1005006101561640.html RH771S antenna - aliexpress.com/item/1005006909734550.html FM band stop - aliexpress.com/item/1005005202844390.html box for FM band stop - aliexpress.com/item/1005002117385683.html Baofeng volume knob - aliexpress.com/item/1005006445672504.html UV: (search ali for better deals if prices change) (if links are broken let me know) Cheap UV light, $1 - aliexpress.com/item/1005006079241384.html Solder mask, $2 - aliexpress.com/item/32963345470.html Solder mask alternatives, if you don't have $3 - forum.arduino.cc/t/solder-mask-paste-alternatives-solved/626071

Спасибо

Anyone selling a modified version of this already? With the antenna mod

Nah. Preamp is generic.

@@codernov Tks for your answer , Of course it is, however for those who received the board as a kit as me,had to modified it as highly distorted audio was received. 73's

How about you install CEC 0.3 or something like that? Same thing?

@@codernov Well, I’ve checked the mod board, few components were "in the air", so I soldered them. Pity I can't upload a photo here. The signal on FM radio became better, but still too many noise... I've tried these: 1) CEC (02-051 tried all).HF.packed.bin - this one still shows endless "wait" 2) f4hwn.packed.v2.7 3) firmware.X320 4) fw_modded 5) k5_v2.01.33_publish 6) egzumer_v0.22.packed 7) k5 Firmware v2.01.26_publish 8) uv-k5-firmware-fagci-mod-v1.0.1 The only one which receives FM is firmware.X320..... I don’t knw if the radio can transmit, because I only have one... I feel so disappointed and it seems cheaper to buy new one the trying to fix this one, I have no clew what is wrong with this one... can I, somehow, send you a picture of how the mod board is installed?

@@andrewpav3778 On my channel if you click on me there is link to contact me.

Yes. Here is that firmware -- t.me/uvk5_spectrum_talk/54231/56454 it requires upgraded EEPROM. Before you install it, you backup your calibrations and configuration using uvk5prog-win, then you install it using uvk5prog-win. After it's done installing, you turn off the radio, press and hold 7 key and turn on radio, let it finish FFxing. Then turn off radio, press and hold EXIT key and turn on radio, let it finish initializing. Then you install SSB patch, this is a two step install. For SSB patch you connect radio to computer and just turn on your radio in normal mode just like you usually turn it on. Get go here -- codepen.io/fagcinsk/full/PogrKrq and click Connect, and then click Write SSB Patch. After it is done, installation is finished. You short press M key, and select Si47xx, and hit the 0 key, and change to AM, there should be sound. Then 0 key again, it will change to LSB/USB, there should also be sound. If there is sound, that means you installed everything correctly.

@@codernov Thank you so much!! There was no way I would have figured that out.

If you click on my channel, there are links to contact me. Send pics.

Hello ... can you link us up with that picture ? thanks

The one where you solder everything together yourself?

Yeap… no part number, no schematics … nothings

@@360spinky Not this one, but the verson 2 without the preamp, when I was ordering it, there was a choice to order it in disassembled state, it would have been a tiny bit cheaper, but then I though, will the parts come with it or not. So went with assembled board.

@@codernov thanks to you … will asamblate mine tomorrow 😂😂😂 I got stucked at caps. Will buy a coffee one day

Reborn is going to have better reception performance. @fagci really nailed it. CEC is just egzumer that was cut up so that SSB code can fit. Second antenna is easy man. No special tools, no cutting your PCB. We going to install everything flush with plastic and use pigtail so radio can be easily disassembled. It's like no skill D.I.Y. type of thing, and no special tools required.

Yes you do. It is not resistor though. It is a coil. You need 1 mH, 0.5W. Get it locally or here is where I bought them -- aliexpress.com/item/32987240448.html By the way, I noticed you watching the overview video, I have the install video for that board, check it out -- th-cam.com/video/1-vh_8PvYsg/w-d-xo.html

@@codernov thanks