PAYPAL WILL TELL YOU EXACTLY HOW MUCH IN $US BEFORE YOU PAY - THE EXCHANGE RATE CHANGES ON A DAILY BASIS
As the shipping is included in the £53, please leave the Shipping Zone setting in checkout to 'Zone 1' so no additional charges are added
Unlike similar amplifiers from RM and Zetagi, the EA-150P is specially designed for use with legal CB's with a 4w output
The "100w" RM and Zetagi (ZG) models need an input power of 10w in order to produce that 100w output
As these are linear amplifiers - the input has a direct relationship to the output - with a 4w input the RM and ZG amps will only produce around 40w.
The EA-150P also has a 100w maximum output (on AM) but only needs 5w input to produce that, so a 4w input will give you 80w output - twice what the RM and ZG linears will give you for this input!
This can increase your transmitted range significantly and also features a receive amplifier to bring in weaker signals
Amplifiers like this are NOT legal for use on CB Radio (see notes below)
Unfortunately, this is why i cannot list this item on ebay - i did and it was removed and i was warned not to list it again!
The RM and Zetagi amps can work on the 28-29Mhz 10m amateur band so are considered to be HAM amps, but this amp is specifically designed for use on CB Radio!
The EA-150P can be used on SSB but input power should be limited to 8w... If using a modern legal SSB-capable CB radio, and have a power readings facility on your SWR meter, you can use the Mic Gain control to reduce power whilst whistling a constant tone into the mic to produce a steady power reading. On SSB, at 8w input, the amplifier will give a healthy 180w PEP output.
Please read the whole description and 'Important Notes' below, so you know what's involved with using an amplifier like this
100w output from 5w input on AM (90w output from 4w)
180w output from 8w input on USB/LSB
25db receive amplifier (switchable on/off)
Illuminated TX/RX indicator
Illuminated switches for TX amp & RX amp
Frequency : 26-30 Mhz
Power supply : 12v-13.8v
Current consumption : 12a (in FM use)
Input power 0.5-5w AM ; 1-8w SSB
Width & Depth are "Footprint size" and exclude switches on the front and sockets on the back
IMPORTANT NOTES :
CONSTANT POWER SUPPLY : This amplifier must have power to it all the time it is in line - if you don't want it on just use the on/off switch, but if it is in line it MUST have power to it otherwise the relay will close when the power feed is removed and the transmit power from your CB will not be allowed through, causing damage to both the CB and amplifier.
We recommend direct connection to the battery, because of this, but also because any voltage drop relates directly in slightly less power output from the amp.
AM/SSB SWITCH : This switch should be on AM if you are transmitting on AM and switched to SSB when using USB or LSB - this is because there is not a constant signal transmitted on SSB, so to avoid the internal relay constantly switching between receive and transmit with every word, a short delay is introduced, so if you inadvertently put this switch to SSB when on AM the only thing that will happen is that when you finish transmitting there will be a second or so delay before the unit switches over and allows signals to be received.
90W IS THE MAXIMUM YOU CAN GET FROM ANY AMP WITH 4W DRIVE : This is about the highest output you can get from any amplifier when connected to a legal cb with 4w output. There are larger amplifiers available, but these require more 'drive' from the radio, as they have more amplifying transistors. For example : This amp has one main power transistor and it is rated as giving 90w output from 4w input (most other amps of this size will only give 40-50w output from 4w input). The larger amplifiers have two or more of these transistors and may be rated at 200w or 400w output but this would be from 10w or 20w input on FM. If anyone tells you they have a 200w or 400w amp but are using it on a 4w CB the chances are they are still only getting 80-90 watts out of it!).
If comparing this amplifier to others on the market, check the other units max input power on AM ... if it's 10w and has a max output on AM of 100w, you'll only get around 40w output when using it with a 4w CB - simple maths!
THESE AMPLIFIERS GET HOT : The majority of the size of these amps are the heat-sink fins on the top - the job of these is to get hot as dissipate the heat into the air, and they will get pretty darn hot in use, especially with a high power amp like the EA-150P. You need to make sure that there is a free flow of air around these amps - best not to cram them into a small space - if you do, or need to use it in a very hot environment, you can zip-tie a 'PC' type cooling fan onto the top of it, to force the passage of air, increasing the cooling.
YOU NEED A LOW SWR TO USE AN AMP : One of the quickest ways to kill an amplifier like this is to run it into an antenna system that has a high swr... like the CB's we sell, the output transistor (the bit that can get damaged by a high SWR) is NOT covered by the guarantee as it's the user/installers responsibility to make sure the SWR is low - ideally below 1.5 although you can usually get away with readings upto 1.7 / 1.8 if amplified transmissions are kept short. More about SWR on our SWR explained page.
BE CAREFUL WHERE YOU USE A HIGH-POWERED AMP LIKE THIS : Please do not use this amplifier is you are within 100 yards of the following : petrol pumps, emergency services or military vehicles or other CB users on the same or adjacent channel to you. You may also find that this amp can set off some older domestic wireless house alarms as well as cause interference/breakthrough on televisions and radios - maybe best switched off when driving through a residential neighborhood for example... leave the amp for the countryside!
AMPLIFIERS ARE ILLEGAL : Remember Amplifiers like this are illegal to use on CB Radio. A lot of people do use them, and prosecutions are extremely rare and even then only when serious interference or abuse has occurred, but please be mindful of their illegality.
SSB USE : The EA-150P can be used on SSB CB and when used on SSB will take a drive of upto 8w (no more than 8w) and provide an output of upto 180w peak for that input. Current draw will be around 18-20amps
A WORD ABOUT HOW INCREASING OUTPUT POWER WORKS : When using an amplifier, double the power does not mean double the transmission distance. For every half a signal point increase at the receiving radio you need to double your power, so the largest gains are made fairly low down the scale :
For Example : If someone is receiving you at signal 5 when you are using 4w, they'd get you at signal 5.5 with 8w, signal 6 with 16w, signal 6.5 with 32w, signal 7 with 64w, signal 7.5 with 128w, signal 8 with 256w etc etc.
So you can see that using this amplifier will give you approximately a 2.25 signal point increase - however this does rely on their signal meter being calibrated which most aren't really so the actual gains you'll see may differ slightly depending on who you're talking to.
You can also see that if you were running a 250w amplifier, increasing this to 500w will only get you 0.5 signal point increase - the same as going from 4w to 8w !!
If you have any questions or would like further advice or want to clarify anything get in touch on 0044-1306-881137 or our contact form