I just did it and it worked IC-705 (US version) Thank you so much!.I dont have such fancy equipment as shown on this video I Only used small slanted cut de-soldering tip( no luck with a point tip) @ 390 degrees (centigrades) almost the same size as the soldering on the diode (to avoid damaging neighbouring components), no flux, and not hot air. It took less than a minute to bubble under the component (used cheap digital microscope from amazon). A that point I switched to the other side and applied minimum force sideways. They came off clean, one at a time. It took a lot of practice with an old iPhone since this is my first time doing any of this. Removed surface components for one afternoon after I felt confident enough to do it on my brand new radio!. It was intimidating at some points but im so glad I did it. Good luck guys!
Thank you Peter! Does not look too hard to do and it's always better to see these things in a video to avoid accidently damaging some ribbon cables etc. when taking a radio apart.
Hello Peter. It's great to see a video from you and a look inside the 705. Hope you and your family had nice holiday and have a nice Christmas. Thank you for sharing 73
Hi Peter, thanks for your video. I can see IC-705 inside for the first time, nice costruction and easy to manage for any operation inside. Great job as always, best 73s my friend. Pasquale IW0HEX
I use this radio with the Xiegu amp (100w) and it is extremely versatile and I use the stock microphone and get excellent radio reports all the time. I sent mine in to have this modification made and it is certified by a ICOM technician so that I do not void the warranty. It cost about $125.
@@DonDegidio Had a light Bike Crash out in the Woods a few Days ago...the Pain of the Bruises are heavy but I know how to handle it. Been outdoors last Night playing some portable Radio. 100% Moisture @ 39°F lowest Temps. Foggy as hell but I enjoyed every Minute it, Uncle Don. Hope you feeling better soon. 73 & happy Weekend de YFUG 💯🙋♂
Now if we could find a way to modify the Flex Radio SDR software for MARS and CAP frequencies as well as 60 meters……. Very well made video an very clean step by step instructions!
Very good video, thank you very much! Unfortunately some IC-705 has a blue glue on the middle screw on top and bottom to avoid opening. It is very hard to open it without destroying the screw. Vy 73 from DL2...
Thanks so much Peter for posting this video on the 705 & for your easy & simple instructions especially as I was one of the luckier hams who received it early in 2021 & even at AUD$1800 I have zero regrets ever buying the radio & it's my favourite rig ever. Curious if one does this out of band mod does its internal filters show any appreciable drop out of the standard ham bands?. Thinking of doing the mod if I ever take the 705 on holidays with me into EU & can use 4m & 60m as my VK licence is CEPT compliant (VK has nil 4m nor 60m yet!). I have an earlier release 705 from mid 2021 & the front panel fascia says "D-Star" & it's been an awesome radio working with Sotabeams linked dipole plus 2m/70cm antennas off the Windcamp RC1 mount. Recently applied v1.31 firmware from Icom Japan site. Hope you've been really well & looking forward to more content!
What is the upper UHF RX edge frequency stop after this and do you achieve full RX spectrum VFO continues range from .03Mhz to something like 500Mhz / (200Mhz to 400Mhz unlocked ? - my guess is yes). It is a question as no one has mentioned anywhere what the unlocked band edges are ! I have one of the first 705 and will be leaving TX locked and asking the questions about RX out of curiosity and well aware performance will be poo as the band pass is only designed to go up to 470Mhz, unless some mods are performed to the filtering. Diode matrix array is old school from the Icom - IC2 era. Neat the 705 has a SMT32L051R8H6 and ill wait until the warranty runs out before I start probing at it, not that I really care as it is just a kick around radio unlike the 8600 or what ever comes first. The long anticipated SHF version or time for Icom to design a new portable receiver.
@@TRXLab what about RX ? These bands are already factory open 0.030 Mhz to 200Mhz RX with no modification. TX filter's are 0.03 - 74Mhz. 144 - 148Mhz. 430 - 450 Mhz. RX will work ok up to 225Mhz and 400 to 470 Mhz. Does the diode removed go beyond 470 for receive ?
@@wireless80211x Do you think its possible to do a mem dump on that stm32 mcu? I got my 705 open on the bench now undergoing repair. Dummy me put 45v through this poor thing. Magic blue smoke escaped but it's still alive and tx/rx works.
I don't have any need to perform this mod, but was simply interested in seeing what was involved in disassembling the IC-705. Upon re-assembly, do the front-panel ribbon cable connectors simply slide straight into the receptacles on the front panel, or are there any latches that need opening or closing? VERY impressive test bench, by the way! :) 73 form Tom WA1LBK
Sorry, maybe I missed something that has been explained, but why would anyone want full tx across (I assume) all bands? Perhaps for a maritime application? Does the extension also apply to VHF and UHF? It is a pity that the video does not show from where to where the expansion now ultimately runs and whether 10W is available over all bands. And how RX has been influenced.
I accidentally purchased a Japanese variant of this device and 2m is severely degraded in the US on the Asian radio. I will be using this mod to help my case.
Now, if only I can get my IC-705 to pick up the HF bands and not only FM stations. I have tried four different antennas and still haven't heard anything on 40m, 20m, 17m, etc. Been trying to figure out this issue for months now. Ideas?
Nice clean job. I wonder if there are 90° hemostats/pliers with a thin cushion on the working end that would make it easier to reinstall the flex cables. Thanks for the video Peter.
Unfortunately this mod doesn't work for transmit past ~454MHz. The TX indicator lights up, but the power output drops down to 0 watts long before 460MHz (and of course 470MHz). Maybe someone can figure out another mod so it does...
I need to replace the Twin Pst wheel. Is there a guide I can follow to open the front screen? Where can I find the spare part? How is it connected to the board? Thanks
@@forgetyourlife yeah, & cb range 11m, gmrs, marine etc. *mine is a 2023 built US version. The most sketchy part was reinserting the ribbon cable ends, specifically the small one.
no need to de-solder .just use jewelers small flat head the diodes pop right off slide up under and just the slightest twist and there gone.I was done in like 10 minutes start to finish.
I came here and my desktop computer no speakers now !!! hey..leave a message ?? I just ended up with an ICOM 705 from Japan. Before I dumb it I can't be the only one ? Japan. Different amateur bands !!!! Nobody seems to know a mod but there has to be one !!!
Just a word of warning:: If your radio gets wet, DO NOT put it in the microwave to dry it out. It will NOT work and you will destroy your radio!!! I think reprogramming a PLL chip in a CB radio is much easier than working on an ICOM 705. I've heard from other hams that an ICOM 705 and ICOM 746 are easily opened up and when they're opened up it opens up the VHF as well giving the ability to transmit out of ham bands. I would only do this as in an emergency situation. I plan to open up my Kenwood 281a. As far as I know, there isn't a way to open up the VHF on a Yaesu 991a. I've had the MARS mod done and HF is opened up. W Rusty Lane k9POW in eastern Tennessee
At the end of the video, when you are testing the transmit, the VFO shows 5.360 MHz but your frequency counters show 10.190 MHz: what am I missing? Thanks and 73, George, KC1V
That wasn't the frequency counter showing 10.190, that was a watt meter. When the second readout for watage is shown, you can see a frequency counter to the left showing the same readout as the 705.
Would be nice to see the output on the spectrum analyser to see what effect this has on the filtering. Also is it just hf or is the uhf/vhf expanded as well?
So it gains function by removing components... 🙄😂... what a world we live in where the manufacturer puts in EXTRA parts to reduce the performance of their product... 🤔
Super 👍🏻 leider hat Icom hier wirklich Scheiße gebaut muss ich sagen. Denn man kann ohne die Modifikation nicht im 60 m Band senden. Ich hab mein Gerät dazu eingeschickt und hab es machen lassen, weil ich es mir selbst nicht zugetraut habe. Aber ärgerlich, denn man bezahlt Geld für eine Erweiterung, die eigentlich nicht nötig sein sollte, um auf einem freien Amateuerfunk Band zu senden ..73