The original PSK-80 was designed by Dave Benson, K1SWL, and has been produced by Small Wonder Labs, and by the New Jersey QRP Club, the members of which nicknamed the rig the 'Warbler'.

The Top Band Warbler is on the air, currently producing 2 watts p.e.p. output over a 500 Hz sliver of the 160m band, 1809 to 1809.5 KHz, and has made well over one hundred contacts on CW, 11 contacts on classic RTTY, 12 contacts on PSK31, and one contact on single-sideband, suppressed-carrier phone.

Antenna is an endfed wire, 80m long and 5m above ground. Tuner is a Heathkit HFT-9-B having an added 750 pF fixed cap in parallel with the stock 'antenna' variable cap.

For all my favorite modes, I am using Multipsk software which runs under Microsoft Windows XP Home Edition on a Dell Latitude D510, manufactured in 2005.

Best CW DX from here in sw Virginia so far is with K5BG, Weatherford, Texas...about 1024 miles.

Best classic RTTY DX is with AA1E, Swanton, Vermont...about 662 miles.

Best PSK31 DX is with KF9KV, New Glarus, Wisconsin...about 614 miles.

Best SSB phone DX is with KI3DS, Pasadena, Maryland...about 256 miles.

7th-order low-pass filter module - mounted via standoff - is positioned just above the rig's p.a. stage, and replaces the Warbler's original 3-pole low-pass filter. Lpf L & C values calculated at: http://www-users.cs.york.ac.uk/~fisher/lcfilter/

Receiver RF gain control added in lower-right corner of the Top Band Warbler.

Image of the current state of the TBW (Top Band Warbler) project:

Top Band Warbler mods