Here’s how I opened up my Transmit (Tx) and Receive (Rx) on the Yaesu vx-170. Out of the box, this 2meter radio only works on 144-148Mhz. This quick procedure increases the operating range to 137-174MHz.
1. Take off the battery.
2. Remove the black sticker in the battery compartment to reveal this:
3. Next, you can either pop off the Resistor by putting an exacto blade under it and twisting, or you can just make a small cut in the circuit I’ve pointed out where to cut with the red arrow. Benefit of cutting the circuit and leaving the resistor is that you could just touch the circuit up later with a drop of solder and the radio will be back to 2meter only frequencies. That’s what I did.
The below picture shows my cut. 
4, Next, while holding down the PTT and the button under it at the same time, turn on the radio. The screen will read “SETRST”.
5. Rotate the dial knob until it reads “ALLRST”, then press F (bottom left button)
6. Done. To make sure it worked, tune to a channel outside the 144-148 range and push the PTT. It read “ERROR” when I hadn’t sliced the circuit sufficiently.
Cloud Base addict 
Since that’s a zero-ohm resistor (equivalent to a wire), removing it is a better idea than cutting circuit traces. You can still restore the radio to its original operation by putting a blob of solder where the resistor used to be.
By: J-J Cote on September 1, 2009
at 12:54 pm
just “cut” the circuit,if you need to restore it use a pen ( grafit) instead of solder ( i am not joking,try it 🙂 )
By: mopje on September 12, 2009
at 2:44 pm
Zero Ohm resistor? Why would you put a zero Ohm resistor at all??
By: Fuif on September 22, 2009
at 7:12 pm
This is how electronics designers make things optional. If that circuit is connected, the microprocessor does not allow transmitting on the non-ham frequencies. If it isn’t connected, then it does allow it. It’s like putting in a switch that’s designed to be in only the open or closed position, rather than flipped by the user. If they are making a batch of radios for sale to someone authorized to use the non-ham frequencies, they would build them without the resistor in place. The whole point of a zero-ohm resistor is to be an optional jumper across a gap in a circuit. Since the machinery is already set up to handle things that are the size and shape of resistors, they make these jumpers look like resistors.
Basically, the engineer who designed this board already put a cut in the circuit for you, and installed a jumper across it that is easy to remove. That’s why the resistor is there. Making a separate cut is a weird thing to do. It’s like cutting a hole in the side of a cereal box to get the cereal out instead of opening the top.
By: jjcote on September 22, 2009
at 7:49 pm
Ahh Got it … Thanks
I can Understand both approaches, I guess you cut the line just because the resistor is hard to get out and put back if needed if you only have a basic solder gun .
By: Fuif on September 22, 2009
at 10:01 pm
The resistor is easy to remove. Takes very little heat, or you can just yank it off (or crush it). Replacing it with a blob of solder is actually easier than bridging a cut with solder, because of the solder mask.
By: jjcote on September 23, 2009
at 1:55 am
This modification also works on the Yaesu FT-270, a radio that is almost identical to the VX-170.
The modification procedure is almost identical. I opted to pop the jumper off with a knife.
By: Anonymous on October 20, 2009
at 12:01 am
i see you know about this radio.would you tell me why my radio is not transmitting.it is quite new.i can recieve but i can not transmit over 50 mt..the antenna is bended a little bit this can cause that ?anything else to check ?thx..
By: serdar on November 22, 2009
at 7:36 am
i have just opened up my FT270R and there wasnt any 0 ohm resistor in it. I can tx from 136 – 174Mhz.
By: Kelvin on December 21, 2009
at 12:04 pm
Thanks. This works very well. Just using a kitchen knife to scrape through the wire in the area illustrated worked well.
By: Dave on January 17, 2010
at 7:49 am
Have a new FT-270 and anxious to give this a try.
By: KE5IFA on February 13, 2010
at 12:44 am
I’m fairly new to amateur radio, and I own a FT-270. I popped the resister/jumper off and it works great!
Couldn’t be happier. 73s!
By: anonymous on February 28, 2010
at 10:46 am
Tanks, I did not got any “error” or text it gos to 144,000 and after that i can go were i want
Tanks again.
SM7Z
By: Odd on March 8, 2010
at 3:34 pm
Any idea if/how I can get my VX177 to use 6.25 channel step? Is there a mod for it? Forgive me, this may be basic info to you but I’m new to radios.
By: Dan on July 5, 2010
at 10:24 am
Hello,
I did this operation, it works from 136 to 174 but the keyboard doesn’t work anymore and all the functions are not operative. Is it a consequence of the cutting action or did I do something wrong?
By: Blues66 on July 28, 2010
at 9:44 pm
A good reason not to cut , crush or knife . You may have damaged something else in the effort . Really , the best way is to desolder the indicated 0 ohm resistor . Makes for a very clean operation that allow the option to restore to original at a later date . Not only that , it doesn’t look like a hack has been inside the radio . If you are not familiar with surface mount work and/or do not have the equipment simply find a decent tech to do it for you .
By: Gary on January 25, 2016
at 7:20 am
I have an FT 270R, it worked like a charm! I just cuted with my vitorinox like the picture.
Now some keywords to find ths post in spanish: banda corrida, liberar yaesu ft 270r. desbloquear. Paso a paso.
By: Mariano on September 5, 2010
at 5:25 am
[…] Yaesu FT270 $139.00 on Ebay (This is the one I purchased) By removing a resistor this unit can be modified from 144-148Mhz to 137-174MHz. […]
By: Getting ready for King of the Hammers 2011 | 4 Wheel Drive Van on January 14, 2011
at 1:29 pm
I must be getting old. That resistor is the size of a speck of dust and difficult for my old eyes to see. I had to use a magnifying glass and an x-acto knife but it did the trick. Thanks for the tip.
By: Rehoboth Mike on January 28, 2011
at 11:20 am
What camera lens did you use to get such a nice close up photo of those small parts?
By: Kelly Homes on January 28, 2011
at 11:22 am
Thank you for the modification. My radio now has wider TX range. I personally prefered the component removal method. This method leave the circuit board in the untouched condition.
73’s
By: DXer on February 1, 2011
at 12:39 am
Thank you for the modification. My radio now has wider TX range. With the technical background, I personally prefered the component removal method over trace cutting. It rather messy with you make a mistake while cutting the circuit trace.
73’s
By: kg6cvc on February 1, 2011
at 12:44 am
Hola, muy buena info lo voy a traducir al español y lo subo a mi blog… les dejo el credito al suyo, 73’s!
By: Juan on February 7, 2011
at 8:20 pm
Для FT-270 после удаления вышеуказанного резистора сразу открылся весь диапазон на передачу. Вся процедура заняла 1 минуту!!!
By: UB0LFN on February 19, 2011
at 1:16 pm
I just unsoldered my 270. It was easy and works like a charm. Thanks.
By: forestwinds on March 11, 2011
at 10:13 pm
what about the ft-277r(440) same mod?
By: john on July 18, 2011
at 11:03 pm
I have an FT 270 and my balls seem to have grown steadily since I bought it. It’s starting to be painful and embarrasing. Could this trick of removing the resistor help? Should I go see a doctor?
By: Balls on September 7, 2011
at 2:58 pm
what do you mean
By: kj4qyr on October 27, 2012
at 9:45 pm
My yaesu vx 170 doesn’t have a resistor on the circuit board. It was working on a 154.370 frequency but now isn’t. What could be the problem?
By: Bill on October 13, 2012
at 3:36 pm
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By: Www.Guitar.Dewww.D-A-D.Dk on May 11, 2013
at 8:11 am
Do you have to reprogram the radio if your radio has been programmed before this Mod?Anthony
By: Anthony Shepard on July 24, 2014
at 5:44 am
No, reprogramming is not necessary.
By: cleversky on July 24, 2014
at 4:47 pm
Thank U for the quick reply. Anthony
By: Anthony Shepard on July 25, 2014
at 8:42 am
Very simple – just needed a magnifying glass to see the resistor – it really is tiny! I flipped out one end using swiss army knife blade and opened up the TX frequenciez in a couple of minutes – very helpful – many thanks!
By: Tony on May 18, 2016
at 3:57 pm
Popping off the jumper was much easier using a jewelers screw drive. I was
never able to cut the circuit enough to work
By: Bob on December 25, 2016
at 8:00 am
Did the Mod on a FT270-R and it worked like a charm…
That tiny resistor is no bigger than 1x3mm though so keep looking for it 😉
By: Jan Schachtner on February 10, 2017
at 6:22 pm
I wanted to thank all you u I just did the mod on a ft 270 and it worked perfect .
By: Louknew on February 19, 2017
at 4:53 pm
I need a picture of this on a ft 270 don’t want to mess up thanks.
By: Bobby on January 9, 2018
at 9:35 am
Got it thanks again perfect mod.
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