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Commercial T/R switches

Hi all

I am in search of some suitable commercially available Transmit/Receive (T/R) switches for echo sounder development. Two types of T/R switches are required, one operating in relatively low frequency range (i.e. 30-50 KHz) withstanding high voltages (i.e. 540 Vpp) and one operating in relatively high frequency range (i.e. 190-210 KHz) withstanding low voltages (i.e. 90 Vpp).
Kindly help me to find commercial T/R switches meeting the above requirements.

Thanks
 
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