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images..
The RFX-150 and the
SX-175
both contain the same amplifiers inside. The only difference is the size
of the heatsink (fins) on each one of them. I don't know why they
decided to call one the 175 and the other a 150. Both have the same
electronics inside.
Think of the RFX-150 as light duty and the
SX- 175
as heavy duty as far as talk time
before overheating. If you talk a lot and use SSB a lot, then the
SX-175 is
best. If you listen a lot and use mostly AM, then the RFX-150 will do
fine.