The new RFX-75

**CamoRedneck** · 02-20-2009, 05:42 PM

What does everyone think about this...

The RFX75 replaces the transceiver’s final amplifier stage and low pass filter section.

The RFX75 is NOT a standalone amplifier.

The RFX75 mounts to the back of most transceivers with little or no modification to
the transceiver’s chassis.

If you did not know the current supply of rf final transistors is drying up worldwide as manufactures are shifting to using mosfet finals which require modifications to be done to the existing cb/ham radios for them to work as a replacement for the older now defunct rf transistors,.

The RFX75 is a RF final output stage and low pass filter designed as a replacement and/or upgrade for most 10-
meter amateur transceivers. The RFX75 features the latest Power MOSFET technology and a built in S-meter
detection circuit. The output power of the RFX75 varies depending on the transceiver that it is installed on. Most
installations will see 75 – 100 watts PEP output power.Frequency Range: 24-30 Mhz 12-10 Meter Bands

.Power Requirements: DC 13.8 volt 24amps max

Output Power max: AM/FM 15 carrier 100 Watts pep max

S.S.B : 100 watts Max

Modes: C.w-F.m-S.S.B

lLow Pass Filter 3 Stage

Reverse polarity protection

Size: 3 3/8 x 1 5/8 x 2 in

**Dodgem250** · 02-20-2009, 05:47 PM

Where is the fan? I see trouble. I see it sucking the juice right out the radio too.

**CamoRedneck** · 02-20-2009, 05:50 PM

There are videos I can post but not sure if they're allowed.

**CamoRedneck** · 02-20-2009, 05:52 PM

Supposedly it doesn't heat up much.

**Dodgem250** · 02-20-2009, 05:58 PM

ok, here's my thinking on it. The RFX-75 is about $120.00, so, the RFX-100 has to be about $140.00 So, for that price, why not just go to a sponsor on the forum and get a nice external driver, like a 1 pill and for the money, just add a few dollars and get a 2pill. The problem is, if the radio goes bad then what do you got? A lot of additional install time and take it back out time, I personally would rather have a component system versus and all-in-one. Just doesn't seem feasible to me to remove a bunch of stuff from the radio to add in more junk and only get 90 watts... I can buy a nice used 2 pill for $150.00 and have 2 times the power this will give you.

**CamoRedneck** · 02-20-2009, 06:02 PM

I checked and they were 45.00 for the rfx-75.

**MoJo** · 02-20-2009, 06:09 PM

Actually Dodgem....

I have one installed on my TR696FD1 and is swings 80 watts...

I have had it on for about a week and haven't had any heat issues...

The beauty of the mosfet is that it is more efficient than a transistor. Works better and creates less heat.

It was a snap to install, and if you desolder the removed components is really easy to remove...

They are a cheaper alternative to a two pill but still give you a kick.

Some people are comparing them to the stinger boards of old, but they are nothing of the sort.

BTW...

I sell them for $40 plus shipping and have all ready sold 5 in the week I have had them and installed them in 2 customer radios, no complaints from them either...

**preacherman** · 02-20-2009, 06:28 PM

Right with ya there Mojo...I have one on a very lightly tuned TR696 myself and it does just over 100w pep. Clean, loud audio. Runs nice and cool CBrepairman has done a couple of them now and a Cobra black chrome after some tuning does 145w peak and about 54w avg...can you say nice driver for a four pill? At the higher output level, they do get warm...but not too hot touch. I suppose if you did a 10min keydown it might get toasty.

**Dodgem250** · 02-20-2009, 06:31 PM

ok, maybe I was relating to the stinger board myself out of lack of patience. I am sorry for that, I had to rethink the conversation here for a while.

**Dodgem250** · 02-20-2009, 06:46 PM

Nevermind this LMAO, do not try to hold a conversation 10 minutes after you wake up and have no coffee in you. I don't even know where the prices came from and I don't have a clue where I got the 100 from in this conversation, too many dealer price lists and not awake yet I guess, sorry, not a dumb guy, just acted faster than my brain functioned this time.

Originally Posted by Dodgem250

ok, here's my thinking on it. The RFX-75 is about $120.00, so, the RFX-100 has to be about $140.00 So, for that price, why not just go to a sponsor on the forum and get a nice external driver, like a 1 pill and for the money, just add a few dollars and get a 2pill. The problem is, if the radio goes bad then what do you got? A lot of additional install time and take it back out time, I personally would rather have a component system versus and all-in-one. Just doesn't seem feasible to me to remove a bunch of stuff from the radio to add in more junk and only get 90 watts... I can buy a nice used 2 pill for $150.00 and have 2 times the power this will give you.

**Dodgem250** · 02-20-2009, 06:58 PM

well, I have done my research, gathered and downloaded some installation notes for various radios, did some video watching from CBR and I have come to a conclusion.

It's a neat little gimmick-gadget. I'm not a novice by any means, but, I still get the impression that it's not worth the effort and time to install the thing.

Personally, I'll still take the external amp over the RFX unit.

**preacherman** · 02-20-2009, 10:50 PM

Hey...to each his own. If 100w in a single radio at an affordable price is what you are looking for...it's hard to beat. Will it stand up to a 29 with a two pill? Of course not.

**Fluxmaster** · 02-20-2009, 10:54 PM

Yea I watched CBRs video as well and checked out the info and instructions on cbtricks. Interesting I must say, dosnt look hard but does look like it would take awhile. Someone wanna donate one ill give it a test run haha. But actually the price dosnt seem bad at all for the watts you would see.

**Dodgem250** · 02-20-2009, 11:45 PM

Nope, and that's what I mean, for the price, time and labor, why not just got the external amp route and be done.

**MoJo** · 02-21-2009, 03:59 AM

Originally Posted by Dodgem250

Nope, and that's what I mean, for the price, time and labor, why not just got the external amp route and be done.

Are we still supposed to be ignoring your posts in this thread???

lol

Picture this...

A customer walks in and tells you he wants a big radio....

But he either doesn't have the space for and amp cause it's a day cab and his company would fire his ass on site he ran new wires...

Or he is a company driver and hot swaps trucks every day or so...

Solution???

The RFX75. He can take his radio with him and the amp comes too and it runs off the 13.8 VDC of the radio so no power to run.

You have a happy driver who now can get out there a bit better than he could with the average peak and tweak...

**MoJo** · 02-21-2009, 04:02 AM

Originally Posted by preacherman

Right with ya there Mojo...I have one on a very lightly tuned TR696 myself and it does just over 100w pep. Clean, loud audio. Runs nice and cool CBrepairman has done a couple of them now and a Cobra black chrome after some tuning does 145w peak and about 54w avg...can you say nice driver for a four pill? At the higher output level, they do get warm...but not too hot touch. I suppose if you did a 10min keydown it might get toasty.

I never really tuned my radio to see what i could push it too...

I honestly installed it and tested it so I could put my word on it and say it was a good product.

Bennie at CB Tricks turned me on to them and I called a few suppliers...

145 watts would make a nice little kicker for a 4 pill...

**MoJo** · 02-21-2009, 04:04 AM

Originally Posted by Fluxmaster

Yea I watched CBRs video as well and checked out the info and instructions on cbtricks. Interesting I must say, dosnt look hard but does look like it would take awhile. Someone wanna donate one ill give it a test run haha. But actually the price dosnt seem bad at all for the watts you would see.

If you want to play with one flux let me know and I'll see if I have an extra one when i send all these out...

**10 Gauge** · 02-21-2009, 06:49 AM

This honestly looks like a pretty spiffy little unit. I wouldn't mind trying one out just for the helluvit.

I think we should definitely raffle one off.