[Amps] TL-922 QSK Boards Now Available

[Jim W7RY]

All. 
I have finished the design and manufacturing of the QSK relay switching board for the TL-922 amplifier. The board also has built in soft key, (low voltage low current) switching for your rig keying line, positive keying line, (key your amp with +5 to +14 volts from your computer or rig) and the voltage dropping resistor for the step start relay. Please see the schematic. 

I have a limited number of boards available for $16.00 each. If there is interest, I'll also have the input reed relays available. The input relays will be around $12.00 each. All plus shipping. 

You will have to buy your vacuum relays from Max-Gain Systems or other sources. 

LOTS of pictures and the schematic of the board mounted in a TL-922 are shown in this link: 

http://my.inbox.com/photos/w7ry 

You will have to buy your vacuum relays (RJ1A-26N969) from Max-Gain Systems or other sources: 

http://www.mgs4u.com/RF-Microwave/vacuum-relays-SPDT.htm 

This circuit design is based on the Rich Measures design. Please see: 

http://www.somis.org/QSK922.html 

I have added the switching transistors for switching the LEDs for transmit and standby. I have also replaced the meter lamps with new high output LEDs as well. The series current limiting resistors for the new LEDs are on the circuit board. 
The parts list is being completed now. It will have all the part numbers for ordering the parts from Mouser. www.mouser.com. 

For the TL-922 installation, you have to make a couple of very small chassis modifications. 

This board will also work very nicely in the Heathkit SB-220 among others. 


I will ship world wide by US Mail. This is not a business, I'm doing this to provide a help my fellow amateurs a way to modify their amplifiers for QSK or very quiet relay switching so shipping will be done when I have available time. Usually on the weekends. 

A very SPECIAL THANKS to Karin, K3UU for her getting me started on this project! A QST article will most likely be following soon. 

Thanks for the time and enjoy. 

73 
Jim W7RY w7ry at arrl dotnet