Galaxy dx 98vhp swr problem

You would be better off using an external SWR meter.

 

Try this ......

Borrow ( or steal ) a good SWR meter ...

IF it agrees with your 98's meter what MAY be wrong is your radio is puting out harmonics ....

TO check for this borrow ( or steal ) a good low pass filter put it on the OUTPUT of the radio with the SWR meter on the antenna side of the filter if the SWR goes down thats your problem .....

 

CD,
If the low pass filter indicates you're putting out harmonics, then it's a fault in the radio. When a proper alignment (tuneup) is done with an oscilloscope, voltmeter, and spectrum analyzer, the tech makes sure that all of the power being produced is actually on the band (27 MHz) that it's intended for. Most radios have what's called a "TVI trap" or a "54 MHz trap" which has to be tuned with a spectrum analyzer. You'll notice that 54 Mhz is two times 27 MHz, and is right where analog TV Channel 2 sits. The adjustment looks like any other coil near the final stage, and a butcher CB shop, that has only a wattmeter and tunes for maximum "feel good watts" will tune that trap like any other coil, i.e., for maximum indicated power. The *right* way is to look at the output on a spectrum analyzer set to 54 MHz and tune for minimum signal at that frequency.
It's that signal, the second harmonic of 27 MHz (2 times 27), plus any others (third harmonic = 3 times 27 = 81 MHz; fourth harmonic = 4 times = 108 MHz) that a low pass filter is made to keep from going to your wattmeter -- and your antenna.
But wattmeters are dumb, so any watts the radio makes will show up, never mind that it's interfering with television, FM radio, or VHF aviation beacons.
At the same time, wattmeter SWR bridges are trying (badly) to show you the antenna's efficiency at all the frequencies your radio is putting out. Your antenna will not work at 54 or 108 very well at all, and the SWR bridge will show that as a high SWR. The antenna will work somewhat at 81 MHz (even though you don't want it to).
So, like Bruce said, a quick check of any tech's work is to put a low pass filter between your radio's output and your outboard SWR bridge. If the SWR gets better, your radio needs to get tuned by someone who's competent AND has the necessary gear to populate his service bench.
FWIW, I always have a low pass filter on the output of any CB or HF rigs I run at the house and vehicle. Good ones are not expensive, especially on eekBay, and they're just good engineering practice anyway.
Hope that helps,
-- Handlebar --

 

You Cant set the swr with a high power radio

 

AGREE why not

 

Because the meter in the radio will give you a false reading. Using a radio to set the SWR is not a true reading anyway and the extra power in high power radios will only make the reading worse the only true way to adjust the SWR is with a true SWR meter