RFX-75 Install in a Cobra 29 Black Chrome

[shamuslauer1]

so yeah...was talking without an antenna...forgot it wasnt on...u think the rfx will fix the problem and help the radio get out? thanks. and if you do instals i would LOVE to give you my buisness (cobra 29 supertuned)

[paraglidermx]

Dont worry guys,, I will be posting a step by step vid.this Winter on how to do this on a uniden pc 78,,

same thing as cobra 29,, 577-Tomcat Jersey ;-)

[oilfield01trash01]

Why would you cut audio limiter for a few more watts, no one will notice a few more watts...

[jlafnear352]

I'm pissed I had an rfx 75 put on my cobra lx and it only put out 90 watts wtf can u tell me why this is

[paraglidermx]

@jlafnear352 90 watts!!,, What the hell do you want??Every meter is different unless using a bird,,I get around 90-100 cold then after it gets hot I lose a few,,nature of the mosfet,,I also suggest using L-17 to bring the power down to around 4 swinging 70,,it will run ALOT cooler and still walk all over any dual final radio.Cant beat the punch this thing has for 40 bucks.

[mrhighlander2003]

Great video!!! Any posibility to install this module in the HR2510 radios?

I now the hr2510 have it own cooler in the back but I think is posible.

Thanks!!!

[TheZeke1974]

@mrhighlander2003 Forget it. It is a hassle to remove the built in heat sink and the RFX 75 will sound AWFUL on SSB!!! Trust me here. I just removed mine from my Galaxy 959 because it sounded so distorted and crappy.. The RFX 75 is a class C AM amp and nothing more. Thats why it is sold so cheaply.

[cobra395]

i looked at the install sheet for this, and first it says to cut the rf out cable off of the rfx board, but later in the instructions it says to solder the rf out to somewhere on the 29 board, im not sure what to do with it. and i dont want to go cutting stuff before i am sure. can you help me with that?

thanks.

[TheZeke1974]

Dont try to use one on a SSB radio or it will sound like doggie poo poo!!!!

[shamuslauer1]

how hard is it to instal an rfx? i wanna do it at home and i have soldered a little in my life and was wondering if u sugjest me goin er myself

[cobra395]

@shamuslauer1 i did it, and didnt screw anything up, if you follow the directions, its not hard, you only live once. go for it.

[meangreen69Nova]

Correct me if I'm wrong but a properly set up CB will put out 4 times the dead key power when modulating...right? If so, then how do you have a 7.5 watt dead key and 133 watts of modulation?

I would think if you really only had a 7.5 watt dead key, you'd only have 30 watts of modulation...that is unless there's a shit ton of harmonics that cause it to read up to 133 watts.

[skeeternic]

Would it be possible to see it on a scope modulated at that power?

[jpj8723]

80 watts max!!!!!

[imowtflol]

Fake power readings. Set it to the right scale

[OriginalBurton]

@imowtflol Whatta a dumbass!! Check out the features and specs on the meter. Plus, if on wrong scale.....Well enough said. Go eat your crayons, retard.

[shamuslauer1]

heres the deal. i got a supertuned 29 ltd and i want more watts. will this help(details)? if so how would i get one? reply man! u need buisness and im ready to pay XD

[shamuslauer1]

what does it do

[Brad81188]

Very nice video doug. Ive thought about getting this put on my black chrome a few times. but i may do it not too sure yet. But this is by far the best result video for your regular am cb radio ive found in my opinion on here. great product. 

[oneandonly478]

@cbrepairguy , how much will u charge to install one. can contact me at tsmithasmith@yahoo.com

[Ricaroo85]

If its wrong it will fry your radio, highly doubt it,,,, being a tech, not easy as it looks!

[paraglidermx]

You really need to do an DIY for this.The instructions are kinda techy ;-)

[cobra395]

is it possible to put one in a cobra 29 nw st wx? i have heard that it will fry the radio in a short time

thanks

[D0cTerG0nZ0]

whats wrong with my cobra 29 if it keeps blowing fuses? thanks

[cbrepairguy]

@D0cTerG0nZ0 Well I don't know what you are trying to say for sure, If you have a RFX-75 on it make sure you have a 7-10 amp fuse in the power cord. If you don't then you make have a Protection diode blown inside the radio.

[D0cTerG0nZ0]

@cbrepairguy is replacing the diode a easy fix ?

[rchafin42]

WOW..So many rude know it all truck drivers that think they know all there is to know about a radio..NOT!!!. I infact have one installed on a cobra 29 nightwatch and LOVE it..Maybe some of these rude drivers ought to get out from behind the wheel and try to sit in your chair cbrepairguy..

[Ronengato]

Hello , i am a long distance truck driver. i have a Cobra 29 LTD Classic. I have been viewing the installation of the RFX75 and I am wondering if you would install one for me please contact me.

- Email: anahgato@yahoo.com Thank you and hope to hear from you soon.

[1badfinger]

At the begining you say you've never done one of these installs before, then at the end of the vid you say this is your second install.... which is it?

[ZachAttacksPHX]

@1badfinger haha keep replaying at 0:18 sec and 3:16 sec

[jimoldschool]

this vid sux...it shows nothing on the install, just after shots....where is the install vid???

[cbrepairguy]

@jimoldschool This is it... The Video is not meant to be a DIY, it is meant to show you the hookup and results.

[ty6784]

alright i was wondering do i have to do any moding to the dead key or can i hook the rfx-75 to a bone stock radio and get good preformance

[cbrepairguy]

@ty6784 That will depend on the radio and what you want to do with it. Most of the time you will want to lower the dead key to about 2-8 watts. You cannot go over 15 watts with the unit.

[1SoundBlaster]

Hi can you tell me were did you buy the RFX-75 kit from

i live in the uk would love this kit to fit to my cobra 29

[cbrepairguy]

@1SoundBlaster I sell them on my site.

[stresstest]

I'm dieing to see this config into a 4-pill. This is something I am planning on doing but if you have the ability to toss a video up with a 29 black chrome + RFX75 into a 4 pill amp I'll owe you a coke :)

[stresstest]

Did you by chance see what it would do after a nice tune?

[TheDodgeman77]

nice video's keep them comeing just wanted to ask do ya have any video's on tune or tweaks for a cobra 29LTD classic by chance

[allenward69]

i installed this did what i was told from stock radio with low swr and got about 80-90 watts out i would recommend i fan ib this as it does run hot if you talk on this radio for about 10 min on and off the key.. plus you have to upgrade your power wire fuse dont really look to impressive over the mosfets not much difference for all the work involved.. roadstar communications

[LucioCapaTosta]

Ma questo si pensa che siamo tutti dei babbioni che crediamo ai 133w quando quel linearetto monta un finalino da 75w? Ma dai... AMERICA!

[1112223333111]

see the bar graph was way down to the left?

Whats the low range set to on the meter?

[1112223333111]

sorry I meant MID range, I put mine to 250 so it dont bump into the HIGH range, the bar graph looks decieving.

[cbrepairguy]

@1112223333111 That is set to reflected power.

[slimjim119]

how to install a rfx-75 in a grant lt

[SPINNINGwithJD]

what does this do?

[K9FON]

I wonder how that will work with a SSB rig like the older Cobra 148 GTL.

[cbrepairguy]

@K9FON It will work but I don't like the audio on SSB.

[theonecubano]

how can i get this mod?

[dorslv]

Dear cbrepairguy, have you done any of the RFX-75 upgrades to a cobra 148 GTL(Chinese) and if so were the results comparable?

[zzcarss]

i did this mod on same radio great results !!!!

[RustyCarnahan]

I've got a Cobra 19 Ultra III. Is there anything that can be done to make a silk purse out of that sow's ear?

[drtman22]

I had my dale jr cobra 29 peaked and tuned and rfx 75 installed and echo with talk back by print out from the cb shop in WALLCOTT IOWA said i had 110 watts but my buddy hooked it up to his lil meter at 100 hundred watts and he said it was reading like 35 watts did i get ripped off CAN SOMEONE HELP ME TO LET ME KNOW IF I GOT RIPPED OFFIM NOT REAL RADIO SMART

[markybyeah]

i like

[cbrepairguy]

It sounds like you buddy's meter is an RMS reading meter and not a PEP.

All the means is that the meter will not read peak power. Take it to a shop and have it checked and then you will know for sure.

[drtman22]

thank you but cb shops around here i cant trust the guy i like to do my radio work is gone to texas for winter

[1112223333111]

Nice video but the booster is a huge waste when amplifiers that put out several hundred watts need 2-3 watt input.

You did a good job but I think cobra's have wicked swing with just the npc mods, with 1 watt carrier swing to 15+

I had a shooting star 225 that loved that swing to pieces.

I would just buy a modulator and call it a day.

[chicoandtheman1955]

I Would love to see the rfx 75 in a galaxy 959 and see what happen,,,whith 2 or 3 watts dead key

[cbrepairguy]

In a 959 you will see about 90 watts of power.

This is due to the difference in the modulation circuit.

[jt7010]

How about the new Army Strong Cobra 29 - will this RFX75 device work in this radio?

[2H1O1]

Can you show us a 148 with the RFX-75 ????

[kband635]

I am wondering if there would be any difference in putting it in a Cobra 29 Classic, LTD?

[cbrepairguy]

No there is no difference.

[Prothink2]

@cbrepairguy So do you leave the VR4 mod pot stock too? And if you turn it up what effect does that play on the amp?

[magmount]

yes. it is illegal to modify a cb radio.

[MasterBowyer]

@magmount Don't talk out of your arse!

It's only illegal to TRANSMIT on a modified radio! IF you're NOT licensed!!!!

Go do some REAL research...

[vtwinbuilder]

as an owner of a cobra blk chrme with the rfx upgrade all i can sey is cbr does an outstanding job and the radio sounds excellent and by the way cbr my 2547 is kickn ass thanks and have a fine day

[AK47cowboy]

as i said on another video. a few techs have said to leave a 20-25w Dead key when using this RFX and it works like a well oiled machine. any insight in that??? they say when using a low low DK it sounds terrible when it swings over 60w

[cbrepairguy]

Well that has not been my experience with the RFX unit.

I set the dead key to 2 watts and have great luck with it.

The instructions say not to set the dead key over 15 watts as this could cause the unit to overheat.

[patriotsdynastythree]

i would love to see the rfx-75 in a magnum

delta force

[Z28RADIO]

The amp is terribly non-linear if the radio is stock. I mean the carrier of the 29 stock is around 3 watts and swings to 4, yet output is 7 swinging to 130? Put it on the scope and see what the audio looks like. That seems like a bit too much swing for clean, clear audio.

[cbrepairguy]

Well if it is set up right you will get a clean sound from it.

I don't remove the limiter and it works just fine.

[hibuckhobby]

Have had one on the bench.  Works very well and is not a splatter box in any way.

[cory8791]

where can i buy RXF 75 thanks

[717Electronics]

you show the watt meter, but what you should really show is that radio on an oscilloscope and spectrum analyzer. Wonder how many watts are on freq.

it's just another toy for the mudducks to try and get with the big dogs.

[cbrepairguy]

Wow, If you are talking about spectrum analyzer then you shurly are not talking about running a big amp as we all know what they look like on the analyzer.

This unit is clean if you set it up that way and that you can take to the bank.

[bktk8]

7 watt carrier and 130watts with audio should sound awesome--- NOT

[fred30680]

I did some checking and found that the unit is a fixed. Theres no way to adjust the watts. However I am sure somebody out there can come up with a way to make it

variable power. At any rate it would make a good base station.

[fred30680]

That looks awsome. I do have a question

You got that radio putting out 130 watts. Is there a way to trun it down if needed ? If your talking across town 130 would be great. If your going down the road with someone behind you you would be blowing them away. Just wonder if you have a way to control the watts ?

[meangreen69Nova]

Wow, so is this the same as when you add an amp? Wonder how well that radio would get out there?

[ToughLuckMobile]

good video

[fordbroncodave]

how come the texas ranger 696 FS only did like 90 watts or something like that and this does alot more?

i want to see it on a 959 and a cobra 148 old sytle.

any one know the price on these? where to buy? bulk?

[bosshog454]

will definitely look forward to actually seeing a little more info on the install..

[ironhead320]

there bad man sweeets audio

[M28443]

AWESOME

[M28443]

NICE ....CBR  AWESOME !!

[BLUZUMR]

Pretty impressive results for sure...Bulldog