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Heil Pro Set Elite is very nice. It has the HC6 cartridge and high sensitivity head sets for low drive. Your 590 should have audio at a back panel jack that will cut off when the head set is plugged in the front panel jack. Patch back source to a favorite speaker or audio system. Check your...

I have been using a 480 for the last 5 years as a base and was quite happy with it's performance except for no 2m/70 bands. Just bought a new 2000 about 3 months ago. Here are the general differences I see between them. 1. The TX bandwidth is 3000 vs the 480 at 2800. A plus in the audio...

If we really want to get technical, the UHF 259 type hardware is not a 50 ohm connector. The UHF designation is also a misnomer but accepted convention. The center pin diameter and the outer shell inside diameters and spacing does not compute out to 50 ohms or even close within +/- a few...

Below 29.6 you must go narrow band FM setting on your radio per FCC rules.. There is no rule prohibiting FM in the 28.3 up segment as long as you hold a General class or higher. The 29.6 FM is a preferred band plan area same as AM at about 29 but can run AM below that as well. You will not be...

We don't know your amplifier specs. Here is what your missing: Dead key is the carrier only. 100% modulation added to the carrier would be a 'peak drive' of 20 watts if the dead key were 5 watts or 5x4=20. If this overdrives the amplifier on peaks there will be distortion and splatter. You...

For a different type of reference, the stock CB radio at 4 watts carrier is 16 watts peak at 100% modulation where as the stock SSB is usually 12 watts peak power. Actually less power on SSB in normal stock unmodified form. The reason SSB seems like a higher power level is all in the SSB...

Some experience to offer on the 480. The audio bandwidth is from about 200 hz to about 2800 hz. There is not much benefit to EQing with outboard equipment unless the mike needs it. If you get a copy of the Kenwood ARCP program a custom EQ can be setup and written to the 480 in the user TX...

This radio and many other act the same way on AM. My Kenwood TS480 does the same thing. You have to understand these radios have an immense amount of circuit control in the audio chain and the output detector feedback chain that cut the peaks back but slow enough to be seen on an external...

This subject is pretty deep if one looks at all the parts in play. Here is another way of looking at it. 1. The meter does read the sum of the 'phase difference' between the forward power and the reflected power depending on the 'sign' +/-. It can't get away from it. 2. The antenna is not a...

What you need to know about your project is the radio will only pass an audio band width just so wide so there is a limit to frequency level balancing you can do. For example if the low frequency 'roll off' is at 300 hertz you can't force 100 hertz through to pick up more bass as if there was...

To address coax inherent makeup, the diameter of the center conductor, the diameter of the outside shield and what is in the space between them sets the impedance, the losses and the VF. Capacitance is the surface area the center presents to the outside conductor along with the dielectric. The...

Antenna impedance, VSWR and VF are inter related depending on the values being measured. Example 1. Antenna is a perfect 50 ohm resistive termination with no reactive component. A 1/2 wave electrical line length 'reflects the antenna inmpedance at the end of this line. AS WELL, the line...

$18,000 fine in Pittsburg, Pa for a CBer who would not allow the FCC to inspect the station. They are getting tougher lately because of all the dis-reguard for the law. Good luck.

MFJ, Diamond and few other vendors that market the same cross needle meter under different names for the 144 and 450 bands would be as good as any built in function in a mobile radio, cost for cost. They retail anywhere between $60 and $80 usd. I use them and found to be quite good. When...

MFJ, Diamond and few other vendors that market the same cross needle meter under different names for the 144 and 450 bands would be as good as any built in function in a mobile radio, cost for cost. They retail anywhere between $60 and $80 usd. I use them and found to be quite good. When...

They all could be designed to display SWR but on the lower end radios it's a matter of additional cost. On an FT2900 it's a $150 radio. A small meter cost about $60. Would you rather pay $210 for the radio with the feature or buy a seperate meter and have it for the next radio. When you...

Computer power supplies are noisey for radio use. They are usually a switch type. You may filter the DC leads but it may still radiate to the antenna direct or from the AC power cord. Get a good linear (not switch type) power supply that does not generate any noise and runs at the rated...

Ham sticks wound for any specfic band provides a match against the vehichle metal mass. Since each install provides different vehichle conditions, you need to try to tune the antenna first for a match at the radio. Placing many grounds won't improve the basic lack of vehichle area to match...

Would you believe a two element Delta Loop at 30 to 40 feet will be very good for DX. It responds to both polorizations incoming and outgoing for the best overall performance. You have some directivity and some gain to boot in a small light weight antenna.. It can be installed in one of two...

The thread is a sad commentary of not knowing anything about dynamic requirements. Let me try to help. First you need to know the max 'rated' output of the amplifier. Next, the drive requirement is different on AM and SSB. . Example for AM. If the amplifier is rated at 100 watts max/25...