I just made and installed a 20M dipole (with 1:1 balun). The TS-450S loaded with no problems but after several transmissions refused to even come close to doing so. I've checked the antenna and all looks fine. Any clues?
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You didn't list your receiver model number, but here's a generic picture of how you would connect an indoor FM dipole antenna to a Kenwood receiver. These antennas should be available at most home improvement stores or from Radio Shack. They cost around $10.00, maybe less.
Depending on your model, you may have use some adapters. Ask the store staff for help.
The simple $7 dipole is a "twin lead" 300 ohm type that many home stereos shipped with because they are inexpensive, take up little room in the box and work surprisingly well for all but the very distant of stations. These antennas are also found for sale in many department and some hardware stores too. Your stereo may not offer twin lead or 300 ohm hook ups (2 terminal screws near the ANT label) but only a 75 ohm connection (like your cable tv connections), in which case, you'll need an inexpensive 300 to 75 (terminal to cable) ohm balun (or matching transformer) like this one below:
The noise blanker settings on the TS-450S (and S/AT) are true noise blankers and should not be thought of as a DSP device or something that they are not, like a notch filter or IF shift and etc. They will do a fine job of eliminating ignition noise as well as eliminating the electric mixer or blender noise from the kitchen...... however they will not remove static crashes or quieten those atmospheric noises on 75 meters during summer time thunderstorm season activity.
This is usually due to a stuck or shorted ptt line. I have repaired a couple of these and it was the same component each time. The packet TX transistor Q65 shorted causing the radio to power up in TX inhibit mode. Transistor Q65 is located on the underside of the IF board under the ACC 2 connector. This switching transistor is used only for tx (pin 9 of acc 2) and no other circuits depend on it. It can be removed completely if you don't mind not having ptt on acc 2. This seems to be a common problem lately, I hope this helps you.