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Hey, surprised no one has replied to this thread. I am using (3) Blonder Tongue AM-60-550Bs and (1) AM-60-860 with add-on stereo audio board.
Perhaps the biggest improvement I have seen with these, in the quality and range of broadcast, is to make a 'frequency-specific' dipole which correlates to the channel you are using it on.
There is a tutorial on youtube on how to use an RF analyzer to maximize the output level and reduce noise.
On my channel 12 unit, for instance, I have each leg of 18awg solid core cabling at ~13", terminated into an RG-6 run of around 30 feet.
With a portable color TV in my car, running off twelve volts DC, I have snowy coverage at almost 1 block away. Beyond that, my little Quasar portable can not receive the signal in color anymore, and the sound gets snowy. The antenna for broadcast is 3 stories up in an attic area, and RF output level is maxed out.
Think I will settle on about a halfway power level setting, since I do not need to cause interference. Also, these run quite hot with the power at maximum.
I suppose your antenna is roof-mounted to still be usable at a quarter mile!
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