Question about Palomar Redman Cb Stop Hd 450-fet Hd 10 Meter Linear Amplifier Amp Ab Biased Preamp

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How to repair a palomar 450 fet. Ld amplifier.

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Sniff around inside ,see if there is the smell of burnt wire or other componants.If it turns on see if there is a componant that starts to smoke.If it does change it and see what happens.this is called trouble shooting.

Posted on Sep 11, 2014

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Its likely those FETS were not designed to be used in that amplifier configuration.

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If it is made by Palomar and it is a small amplifier, you can bet it is a low drive. Check those transistors. It could have the new Mosfet 655's in which case definitely low drive 3-6 watts input max.

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How many fet tranistors are in this unit and what is its max amp draw.?


There are 5 transistors in that unit that you are asking about. The amperage draw is about 50 amps

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Need to know how to hook a palomar 450 HD to a connex 3300hp


If its in a car or truck use heavy gauge wire to power it. I use a 3ft jumper between the radio and amp. Should use a grounded antenna system. Not a "MAG MOUNT" type. Those can "feed back" rf to your radio and cause problems. If using in the house, a large power supply will be needed.I own a palomar elite 400 hd.It uses every bit of my 30amp power supply. Your hd amp should like the hp radio.

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How do i fix a weak cb radio transmission


Before having a fix on your rig, borrow from a buddy

a SWR meter, measure the power rating of your radio.

It should be having at least a power of 4W with a good SWR of 1.1 to 1.5.


That power would be a match for amp like these:

http://www.cbradiomagazine.com/Amplifier%20Reviews/Palomar%20Elite%20250/Palomar%20Elite%20250%20Review.htm

Sep 19, 2012 | Cobra 29 LTD CB Radio

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I just purchased a cobra 29 LTD Classic mobile CB radio.Pro tuned high performance Mosfet Final I have a palomar 450 LD mosfet linear.will i have any problems?


Not if the power output from radio to amp is set correct and the jumper for coax is correct length and there is absolute perfect match between them and the antenna used. Afterthought: also the amp better be connected to something big enough to power it.

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What does the red and green light mean ???


red and green light? there is most likely a protection and a power light. The red I assume would either be a protection light or a clipping light signal. Does the amp kick off then these lights kick on red then to green?

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1 Answer

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CAN YOU E-MAIL ME THE MANUALS FOR THE VOLFENHAG ZX 7150 AND THE ZX 7170 MY E-MAIL IS smas5305@yahoo.com thank you Thomas Anderson

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1 Answer

My Hifonics BX1500d is still going in protection mode... can that be fixed? greets Gerben


sorry, i am in the US. I couldnt begin to tell you where to get your amplifier repaired.

Try contacting HiFonics at www.maxxsonics.com


There are 3 possible conditions a HiFonics amplifier will go into protection -

Ground Loop - Blown or damaged speaker causing damaged Output FET.

Power Supply Failure - Blown Capacitors, Damaged FETs, Faulty Relays.

Thermal Shutdown - Excess Heat.

Mono channel amplifiers are the simplest to work on - and I would Estimate a repair cost of $75USD if it is a simple FET replacement.

Look at one hour of labor plus parts.

Hope this helped.

Thanks for using FixYa - a FixYa rating is appreciated for answering your FREE question.

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1 Answer

AudioBahn A2300HCT no sound


Generally, if the amplifier smokes, the power supply FETs have failed.

Many times, the output transistors fail and that causes the power supply FETs to fail.

Audiobahn won't release schematics. The amplifiers are relatively simple and a schematic isn't generally required.

If you know how to check the transistors, check them to determine the severity of the damage. If you don't know how to check them, read through the following page following all links provided.

Basic Amplifier Repair

Let me know if you have any other questions.

Sep 04, 2008 | AudioBahn A2300HCT Car Audio Amplifier

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