[Lowfer] HiFER QRP Audio TX from Turkey.

[Bill Cromwell]

Well um...

To be a mopa requires at least two devices in the rf section. The master 
oscillator (the"mo" part) and power amplifer (the "pa" part). And those 
are stages, not device count. The master oscillator or the power 
amplifier - or both could have more than one tube or transistor. In 
practice there are more than a few mopa rigs with a pair of 
tubes/transistors in the power amp stage. A single device in the rf 
section is a power oscillator. Those mopa rigs are the least that can 
sound truly good on the air. Some hams claim their power oscillators 
sound good but I can't verify that. The ones I experimented with sounded 
like crap. The ones that were identified on the air sounded like crap.

73,

Bill  KU8H



On 07/14/2014 01:43 AM, JD wrote:
>>>> as if we didn't have enough garbage on HF to deal with
> Amen!  A one transistor MOPA stage, and a one transistor modulator...bet
> that sounds nice on the air.  :(
>
> No doubt there are some folks who will be glad to believe 100 mW is "legal"
> as claimed...which could conceivably be true if there were a permanently
> attached 3 or 4 inch antenna, I suppose.  But what do you want to bet
> there's not?  Nor any measurement, certification or verification done on the
> non-home-built rig to make it legal to import in the first place.
>
> To borrow cynically from the State Farm commercial in a more accurate form,
> "they can't put it on the Internet if it's true."
>
> JD
>
>