I still have my old Johnson TR switch and it worked beautifully! Dead
silent and wonderful QSK.
Gary
KA1J
> The reason that the amp had no T/R relay is, there were no
> transceivers back
> then.
> We had separate receivers and transceivers.
> Antenna switching was always done external to the transmitter.
> Transmitters had no T/R relay.
> The transmitter was simply connected to the input of the amp.
>
> Many people used an external T/R relay to switch the antenna between
> the
> transmitter and the receiver.
> If you used an amp, you just used the same switching circuit but
> connected
> it to the amp's RF out.
>
> Even cooler was the "Johnson Viking TR Switch."
> This was an external device with two vacuum tubes that
> automatically
> switched the antenna between the RX or TX (instantly) whenever it
> was
> activated.
>
> I guess we can say the Ameritron QSK-5 is the descendant of the old
> Johnson
> Viking TR Switch.
>
> 73
> Rick, DJ0IP
>
>
>
> _______________________________________________
> TenTec mailing list
> TenTec@contesting.com
> http://lists.contesting.com/mailman/listinfo/tentec
>
---
This email is free from viruses and malware because avast! Antivirus protection
is active.
http://www.avast.com
_______________________________________________
TenTec mailing list
TenTec@contesting.com
http://lists.contesting.com/mailman/listinfo/tentec
|