Customer Comments
Hi Ron,
Yes you did send the material but I didn't notice any real difference until the other night when the fades were very noticeable.
The SD-1 worked outstanding. Very nice design...all the best.
Rick
Yes you did send the material but I didn't notice any real difference until the other night when the fades were very noticeable.
The SD-1 worked outstanding. Very nice design...all the best.
Rick
Price $80.00
US Shipping $10.00
Or send a check or money order to
the
address below.
The
SD-1 Synchronous AM Detector improves shortwave
reception by reducing the distortion caused by some kinds of frequency
selective fading. It substitutes a locally generated carrier when the
received carrier fades. The locally generated carrier is derived
from the received carrier so it is always synchronized with the
incoming signal. It does not
provide selectable sideband. It can be used with any IF frequency up to
1MHz.
Understand that this is not a cure all. It is only effective with selective fades where it is the carrier that fades. There will be many fades that it can't improve however it does not make reception any worse.
It connects to the receiver IF signal. A power supply and BNC cable for connecting to the IF output jack, if available, is included. An amplified speaker is required. Computer speakers work well and are inexpensive. A Tube Shield Interface is available for use with vintage receivers. Simply put the interface on the last IF amplifier tube. The tubes must be the miniature type. The IF signal is capacitively coupled from the tube to the SD-1.