#257

 1,6 - 54 MHz
 118 - 174 MHz
 400 - 470 MHz

[@fernandoscrenci4874]

Your Performance , Peter is like a top medical Doctor !! Outstanding Work !!

[@Eminem2Pac1984]

you are a beast!!! Thank you thousands bro you made my day...greetings from Italy

[@Joetechlincolns]

Amazing to see how far RF electronics and electronics in general have come. This transceiver handles HF to UHF I assume.

[@fletcherreder6091]

Yup! Spec'd for 10w from 160m to 70cm with a 13.8v supply. I want one bad but I don't have a spare $1400 laying around.

[@TRXLab]

yes up to UHF

[@fletcherreder6091]

@@TRXLab Question: receive is rated all the way down to 30kHz, how good does it actually work down there?

[@labcat73]

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.

[@OleF112]

Good work, Peter. Thank you for sharing! Ich hoffe, es geht Dir gut. Gruß ringsum bei Dir und 73 de Olaf

[@TRXLab]

Danke Olaf, alles okay hier, hoffe bei dir auch. Bleib gesund 73

[@DonDegidio]

Hi Peter, You made that look easy to do. Stay safe. 73 WJ3U

[@DK5ONV]

Hey Uncle Don, how r u doing? 😎

[@DonDegidio]

@@DK5ONV Hi Guenter, The back pain is acting up, but I've been through it before. How are you doing? WJ3U

[@DK5ONV]

@@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 💯🙋‍♂

[@OhYeah-qx9qn]

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...

[@MountainRaven1960]

Could you tell me what temp did your soldering iron was at? As well, besides the soldering iron, what other tools were used to remove the diodes?

[@TRXLab]

370°C

[@alanconrad3527]

Good day. How do I contact you? I have a question about this radio that maybe you can answer.

[@Riceman-o1p]

As soon as you finish this modification you're gonna wanna get on 11 m and act a fool! 😂

[@G0NMY]

Didnt you have to perform a full reset of the radio? I would have thought it would be necessary?

[@TRXLab]

not all radios need a full resat after mod...

[@2e0txe]

Will be super useful now that some of the radios are coming to the end of their Icom warranties :)

[@peterfitzpatrick7032]

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... 🤔

[@TRXLab]

lol

[@wireless80211x]

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]

see under the video in info box

[@wireless80211x]

@@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 ?

[@antronx7]

@@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.

[@axi6ne8us]

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?

[@norman-justerieyazon4819]

Does tgis work on all 705 models??? Japanese, European and US models?

[@paulmeynell8866]

Excellent video , good to see the shadow on the bench , confirming you were wearing an ESD wrist band. Thanks for the video.

[@linuxuberuser]

Now here is a man who know's what he is talking aboot.

[@super-8]

Nice Radio, think the best what can buy on his world. In Conculsion with portability and multi usement

[@pcpc4537]

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

[@johncundiss9098]

Thank you for the peek inside.

[@WA1LBK]

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

[@TRXLab]

don't remember if there were latches or not, sorry

[@onegudman7]

The ribbons in question are friction fit, no latches.

[@Joe_HamRadioGuy]

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

[@TRXLab]

Thanks

[@LifeAtTerminalVelocity]

How much power output are you getting on the 118-174MHz using AM? Thanks for the video, it is incredibly easy to follow.

[@TRXLab]

can't tell since we do not use AM in Europe..

[@duaneallred9719]

Excellent Video. If you do this MOD to transmit on GMRS 467.550/462.550 the output is only 1/10th of a watt. So no GMRS..

[@MountainRaven1960]

Does the full TX cover the CB 27 MHz band?

[@TRXLab]

yes

[@UABFWSS]

Remove same ones for US version? Mine has the diodes in some different positions in the matrix. * it is the same two for US version also.

[@forgetyourlife]

Ever get an answer to this?

[@UABFWSS]

@@forgetyourlife No, but I removed the same ones and it worked out ok.

[@forgetyourlife]

@@UABFWSS on 2m and 70cm?

[@UABFWSS]

@@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.

[@offcamber782]

Don’t forget to turn off the band edge when you are done! Thank you, I followed these instructions and it worked perfectly.

[@Riceman-o1p]

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.

[@gerl9869]

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.

[@TRXLab]

Info now in the discripton box. The power output gets reduced at colsere you are at the filter edges

[@mabo4848]

You need it also to work on 60m band in Europe

[@TheNerdCompany]

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.

[@davidm5972]

​@@TheNerdCompanyIn a similar situation. Did you do this mod?

[@TheNerdCompany]

@davidm5972 i did the mod, it did not work in my case. It seems that recent variants are hard software coded.

[@DK5ONV]

Excellent Job, Peter💯👍🙋‍♂

[@TKomoski]

Just that easy in the hands of a master *Cheers* *73*

[@hectorpascal]

Easy to do once you get there! (but the journey there and back is really quite scary! 😐)

[@TRXLab]

you can do it

[@dd6fm]

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

[@TRXLab]

Ja da hast du völlig recht. Hoffenlich haben die wenigstens den Umbau auf Kulanz gemacht..

[@dd6fm]

@@TRXLab Nein leider nicht .. 73

[@gibbywankenobi66]

I always love it when you use the tweezers! I have got to get some of those!

[@np3jd182]

Is that mod for EU versions? TNX 73 DE NP3JD

[@johnathanasiou9284]

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!

[@TRXLab]

60 m is okay, but 4 m doesn't work at all.

[@ilangrosman]

Excellent tutorial as usual!

[@shepaug]

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 !!!

[@crazyham]

Superb Video my Friend. Much Appreciated & 73 ⚡🙏⚡

[@iw0hex]

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

[@TRXLab]

Nice radio.. Thanks for stepping by Pasquale 73

[@lasa1cku169]

cannot say that our new Radio is impressiv.. just an box of plastic.. get's and feeling of cheap china product hehe.. tnx for sharing 73 de LA4YUA

[@dennisqwertyuiop]

great seeing you videos

[@michaeltietzyou]

das war ja einfach - diesmal, danke !

[@ryry46d9]

This mod allows for TX on 450-470 but it doesn't turn on the PA. Have you looked into this? I have confirmed it is transmitting.

[@GeorgeEI7KO]

Hi Peter. Good to see you as always mate.

[@TRXLab]

hope you are doing well mate!

[@G0USL]

I noticed it was originally on 4metres, Are the European models being shipped as standard with tx/rx on 4metres?

[@TRXLab]

no 4m is not possible at all

[@G0USL]

@@TRXLab Ah thanks That was a dealbreaker for me and the 705! 73

[@wolfhawg]

Hi Peter. Happy to see you again. Hope you have a great Christmas. 73s.

[@TRXLab]

Thank you fpr you too!

[@mikemc4759]

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...

[@TRXLab]

hm, never seen that yet

[@mikemc4759]

@@TRXLab please look at the video of the YT channel "andy kirby" video "ICOM IC-705 EXPANDED TX MOD" he is mentioned it.

[@mikemc4759]

He is saying it is little bit harder to unscrew. But I have seen very hard opening also. But you see the blue glue on the screw.

[@CyprusFromAir]

Thank you soo much for the info and effort to make this video .. !

[@FUNKLABOR_DL1LEP]

Great to see You - thumbs up before I have seen it complete ❤

[@TRXLab]

LoL Thank you :-)

[@georgecollins2905]

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

[@onegudman7]

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.

[@dscooby5942]

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.

[@captaintlamlam2093]

PLEASE do not do that the change that the print is damaged is very high

[@AL-kn4yx]

What about the receiving end? Do we need to remove any other diodes in order to receive the full frequency range?

[@TRXLab]

no

[@nicwage]

Is not a full band Tx… No tx power out on 70Mhz

[@TRXLab]

No TX Power on 70 MHz.

[@w.rustylane5650]

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

[@nutsackmania]

in the microwave?!?!

[@alan4441]

@@nutsackmania😂

[@Alert2024]

Whate about icom 905?

[@TRXLab]

we will see

[@bblod4896]

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.

[@TRXLab]

Thanks you! No not see pliers like that but a good idea...

[@bblod4896]

@@TRXLab Well, you design, patent and build them, I'll be your first customer.

[@Subgunman]

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!

[@ericstruna2193]

Hello TRX lab,I have USA version 705 this mod is it UK model or can it work on USA version,,thanks,great video,good job, Peter,,great engineer guy,

[@andreweastland9634]

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?

[@TRXLab]

at the edges of the filter the power goes down

[@zvpunry1971]

@@TRXLab But what are the edges of the filters? Or a bit more specific, will it work on 4m? ;)

[@TRXLab]

@@zvpunry1971 No 4m

[@comprotudo]

@@TRXLab It´s insane that ICOM does´t allow it to work on 4 meter TX. I would buy it to replace my KX-3!! 73

[@charliem.9998]

yet another great video by Peter & Olaf (I guess) ... best 73s de DL6RDE / AA1KD, Charlie

[@golden-balls-radio]

Ft710 next please 😎