A Balun Transformer converts 300-ohm balanced output of most antennas to 75-ohm unbalanced coax.
It is built into Preamps with 300-ohm inputs or external with 75-ohm inputs.

I think the Winegard PS-8000 is a power injector (plugs into the wall for 115 VAC??)
and inserts DC voltage onto the coax to the mast-mounted Preamp module.
It can't be found via Google, so is no doubt fairly old...which means Preamp is fairly old...

Here is info re current Winegard Preamps:
http://www.winegard.com/offair/pdf/Chart29.pdf
http://www.winegard.com/offair/pdf/2451964.pdf

This site might help understand your antenna / reception issues.

http://www.hdtvprimer.com/ANTENNAS/siting.html

CM3671, which has a VHF range of 100+ miles and a UHF range of 85+ miles. B That antenna is only rated for 60 miles on the UHF. A similar UHF-only antenna would be the CM4228 or 91XG, both of which are rated for 60+ miles.

Does anybody know what box Office Depot carries?

The Office Depot near me,Portland, OR area, has a GE model. My local Fry's is carrying a GE for $5 more than the Zenith DTT-901...go figure.

Thanks for the info. There was no sign of any boxes at my local Office Depot.

What's going on at Circuit City?
Liquidators will start arriving in our 567 stores across the U.S. over the weekend, and closing sales will start as early as Saturday, January 17. Closing sales will run as long as it takes to sell existing inventory, but are expected to wrap up by the end of March. When the liquidation sales are completed, the stores will be closed.

Wonder what the price of CECB boxes will be?

With liquidators prices always go up. End of March...that's plenty of time to milk it in 10% increments.

It's probably been a couple of months since I last visited the Circuit City near my home. That CC store is located at Hayden Island (Jantzen Beach) on the Columbia River between Vancouver WA and Portland OR.

Today around 1:00 p.m. I visited that CC store more out of curiosity than with any intent to make a purchase. The parking lot was jammed. When approaching the front doors I observed maybe one customer leaving the store with a purchase and maybe forty leaving without a purchase.

I walked through the TV section. There were few "customers" in that section but there were several signs reading "TVs 10% off." Big deal. There was a middle-aged couple in the DVD recorder section. A red-shirted CC employee was showing them combo recorders. This couple was being led to believe that they could copy commercial Disney videotapes to DVD with a Sony combo recorder. I spoke up concerning the realities of that situation, mentioning the use of a video stabilizer if they found copyright protection on the Disney tapes. They said that even with 30% off the regular price of the Sony and a Panasonic next to it such a purchase would still be expensive. I didn't see any discount signs in the DVD recorder section.

Usually this CC store has had 100-200 Zenith converter boxes on display with even more in the "back room." I didn't find any converter boxes on display in the usual places they had been displayed before.

There were perhaps fifty actual customers waiting in line to make their purchases. Another red-shirted CC employee was at the customer service/cashier desk. There were also several black-shirted liquidation company employees round about. Most of the black-shirt folks were built like "bouncers."

I made no purchase.

Hayden Island also has a small Best Buy store that moved into the vacated CompUsa building last year. That BB store is tucked into the back corner of the Jantzen Beach Mall next to a Home Depot store and some house-boats. The only thing big about the BB store is their sign. Without that sign the BB store would be hard to see hidden behind a few skinny trees.