Help Understanding RF Transmitting

[Electronic M]

Originally Posted by TinCanAlley

If I got a wide band amp, wouldn't that be able to amplify all three of the channel frequencies output by the Archer? If so, is that where the antenna issue comes in? I'm guessing it's not as simple as rabbit ears on the transmitter and rabbit ears on the TV.

I doubt you'll be able to find a amp with enough bandwidth and power. All amplifiers have a rating called the gain bandwidth product (it may not be a published spec depending on application). Basically it means there's a trade-off between passband bandwidth and gain....
Most antenna amps that are wideband enough to cover multiple TV channels are going to not have enough power to transmit (they also didn't want their amps transmitting). Also the higher the frequency the harder it is to make a good amp for it.
The only thing that might work I can think of is Blonder Tongue made an amplified combiner for their agile modulators when might work.

In antennas there's a similar trade-off between bandwidth gain and size... It'd be most noticeable on the transmit end. 4 separate antennas each optimized for a channel and connected to only the modulator for that channel are going to be better than one combined transmit antenna fed by multiple modulators.

You can try what you want to, but I don't know of anyone who has gone down the path you proposed with that archer box so if you are set on using it to transmit you're probably going to be basically on your own troubleshooting your own unique problems that may or may not have solutions...that if they exist may not be easy solutions...If you like that sort of solo challenge it could be fun.

What I outlined in my previous post is the way that is known to work and will have the most support since many collectors are using Blonder Tongues and most of their issues and the solutions to them are known...if you want an easy transmitter go with a Blonder Tongue, another cable grade RF modulator (there are other brands) or a hilly transmitter.