I'll answer your questions along the way in order of how they are asked. As well as giving some background information on this misunderstood topic. The 800 VDC is less dangerous on certain circumstances. Let me give examples of where it is dangerous and where it isn't. The most dangerous is when the output current is usually greater than 1.5 amps for your exact voltage. By output I am meaning the amperage that is avalible. Not the amperage that is going through your body. Now that seems like a lot. But given you're skin is dry and even if you touched both ends on purpose, it would feel weird and possibly possibly hurt a little. But it won't kill you on the first try. But if your hands are wet, well lets just make sure no one with wet hands touches something with that much amperage and voltage output.
One of the things that is very misunderstood by many is that 1 volt can kill or that amperage kills no matter what the voltage is. That is entirely wrong. Very very wrong. I'm sure a couple people reading and editing this will know this is true. And some won't and will try to edit it to say something different. The non dangerous conditions are if the amperage is 1 amp or below with the 800 VDC given. But this condition is strictly only for dry hands. Wet hands are a no no. The only time wet hands would equal the danger level of dry hands is if the amperage was 200 mA and below. It will hurt a little more than dry hands. And this is why I will say 50 mA is the best. But max is 200 mA.
For your exact info that was given I will say to wear some class 1 electrician gloves. (With a radio you may not have very good flexibility with the electrician gloves, so thick rubber harbor freight gloves will be sufficient enough. If not then wrap 1 or 2 layers of electrical tape over the fingers of contact on the glove) Class 2 is nice to have, and covers up to 12.5 kVAC. AC is not equal to DC when it comes to insulation. For example, I had a 10 kV DC insulator. And 2.320 kV made the insulator breakdown and catch fire. So the lesson here is DC and AC insulation is never ever the same. So make sure you are using the right type and classification of electrician gloves. If you need more info on electrician gloves try to contact a HV linemen or a master electrician in your area. For the 800 VDC if you do not have the money or resources to get the class 1 electrician gloves, harbor freight or any local hardware store might have some thicker rubber gloves. Use those and a chicken stick. That will also work in certain circumstances. But I personally don't recommend it unless you can insulate the equipment or whatever it is good enough. A chicken stick is usually some insulator (PVC pipe) with a conductor on the end. Depending on what you need done, I would maybe use a plastic coat hanger and break off a straight end.
I'm just covering most of the variables but not all of them. Again if you can specify what kind of equipment or if its a circuit board or something I can help more.
I thought I would also add a couple corrections or suggestions. The outlet frequency you gave leads me to believe you're on the U.S power grid. Outlet power can be said as (in your case) 20 Amp 120 or 125 VAC 50-60 Hz. U.S power grids don't have just one set frequency. They tend to usually be in the 50-60 range with + or - 5 Hz. So they really are around 45-65 Hz. But it is usually said as 50-60 Hz.
If you could look on the device and post the input and output info. Such as the output and input voltage, amperage, wattage, VA or KVA. As well as the operating frequency. I can then make a better judgement on what info I give. Those that want to edit this, please feel free to if I have missed any information that is important or that is a side note.
Other Important Information:
Your hands can easily be 100,000 ohms and at max 120,000 ohms generally speaking. By generally speaking I am covering humid climates up to 75 percent humidity and down to 3 percent humidity. 3 percent is as dry as Utah air is. 75 percent would be like California, Florida, Oregon and even Maui Hawaii. If you feel your hands becoming moist the resistance can drop to 50,000 ohms. In some cases if completely soaked will drop down to a very minimum of 100 ohms. But this is the resistance from the left arm to the right. Measurements for feet to hands will have a greater resistance. The values I have given are not based on formulas, these values are based on a real life experiment I did. The feet to hands resistance according to the data I've already gathered with my other data says the resistance will naturally be greater. But I haven't done the feet to hands resistance test myself. So I dont have real values for that yet.