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| CW AMPSEQUENCER® is an advanced computer controller that installs between your iambic/straight key and your radio (or external keyer) to provide data buffering. It also installs between your transmitter and amplifier to provide the appropriate amplifier signal sequencing and driving. It also protects your transmitter relay driving circuits from transients and back EMF generated on the amplifier internal switching relays. When the cw signal from the key is detected by the AMPSEQUENCER®, the amplifier relay is immediately activated while the CW signal is buffered. After a user programmable delay (usually 20mS) the buffered CW signal is passed to the transmitter (or external keyer). The transmitter activation will depend upon its internal settings generally labeled "semi break in" or "full break in". This is totally transparent to the CW operator. At the end of the CW transmission the AMPSEQUENCER® will drop the amplifier relay signal after the SEND control line from the transmitter opens. During CW the transmitter will open the SEND control line accordingly to the user settings of the "cw delay" control. By using this method, the CW operator does not need to change his/her operating habits. COMPUTER CW It is possible to protect your amplifier even during computer generated CW, Just connect the computer control circuit to the KEY-IN on the AMPSEQUENCER® then connect the KEY-OUT from the AMPSEQUENCER® to your transmitter. Some operators connect a straight key or the output of an external keyer in parallel to the computer control circuit in order to be able to "manually" key the transmitter. The same procedure can be observed with the AMPSEQUENCER® Voice Parrots Electronic parrots (message recorders) used in during contest can be used with the AMPSEQUENCER® as long as they provide means for PTT the radio. The AMPSEQUENCER® uses a combination PTT input/output signals to properly sequence the amplifier before any RF is applied to it. For this the PTT from the parrot is routed to the AMPSEQUENCER® PTT-IN and then the AMPSEQUENCER® PTT-OUT should be connected to the transmitter PTT. RTTY Most RTTY programs and interfaces will simultaneously key the transmitter while providing the audio signal, needless to say this will cause your amplifier relays to "HOT SWITCH". By routing the Computer PTT through the AMPSEQUENCER® like in the case of voice parrots above, your amplifier will be protected from this type of hot switching.
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