[Elecraft] KX3 booster

[Bob McGraw K4TAX]

The model that DXE is selling is a VHF amp.  Note the disclaimer for the 
HF model -  RM Italy KL 405v HF Linear Amplifier with Fan

"Export Only: This Model is not for sale in US, we only ship to the 
address outside of US."

Needless to say, I would not run my call through one of these amps.    
There is enough "junk" being used for amps and radios on the air today.  
This only contributes to more noise and QRM on the bands.  Doesn't make 
any difference in what part of the world they are being used.  It is 
still spectrum RF Pollution.

We insist on better receivers.   Heck, we need cleaner transmitters and 
amps, and not dirtier transmitters and amps.

73
Bob, K4TAX


On 11/5/2018 6:41 PM, John Harper wrote:
> I'm surprised a reputable company like DXE would sell the brand:
>
> https://www.dxengineering.com/search/department/amplifiers/brand/rm-italy/product-line/rm-italy-la-250-series-vhf-linear-amplifiers?autoview=SKU&sortby=Default&sortorder=Ascending
>
> John AE5X
> https://ae5x.blogspot.com
>
> _______________________________
>
> On 11/5/2018 6:49 AM, Petr, OK1RP/M0SIS wrote:
>> * I am looking for something cheap but reliable and found this small toy:
> *>* http://www.rmitaly.us/index.php?main_page=product_info&products_id=128
> <http://www.rmitaly.us/index.php?main_page=product_info&products_id=128>
> *>>* The big disadvantage is that T/R switching is RF VOX by relays (no QSK
> *>* available on CW)
> *>* and second complain lack of output band-pass filters bank.
> *
> That's why it's cheap -- a lot of the parts are missing. It's quite
> normal for power amps to generate strong harmonics -- 5dB down is common
> for the second harmonic -- so they must be filtered by an output
> network. Solid state amps without tuners have networks that match to 50
> ohms. Tube amps use either Pi or Pi-L networks that are tunable.
>
> 73, Jim K9YC
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