[Amps] FCC Denies Expert Linears' Request for Waiver of 15 dBRule

[Kevin]

W9AC nailed it.

I'm pretty sure the 15 dB limit applies to kits as well. Example, 
Elecraft KPA500. A home brew amp does not have to stick to the 15dB limit.

As for SPE/Expert, they screwed up.

Why would the FCC grant a waiver to a company that 3 months, or however 
long it was, prior started a petition for elimination of the requirement 
altogether? That's just stupid and has nothing to do with Flex or any 
other manufacturer. The fact that Flex commented on the stupidity is 
irrelevant. The reason the waiver was denied is it's redundant and a 
waste of time with a petition pending to do the same thing.

SPE/Expert got caught trying to use a federal agency for a competitive 
advantage.


On 12/28/2016 9:13 AM, Joe wrote:
> On all this legal stuff.
>
> Ok a ready to use amp cant legally have more than 15 db of gain.
>
> Now how far down broken down that is, does an amp have to be, to be 
> seen as a "KIT"
>
> From what I in the back of my mind remember that a "KIT" does not have 
> to abide by that law?
>
> Or am I thinking of something else?
>
> Joe WB9SBD
> Sig
> The Original Rolling Ball Clock
> Idle Tyme
> Idle-Tyme.com
> http://www.idle-tyme.com
> On 12/28/2016 9:04 AM, Peter Voelpel wrote:
>> A friend of mine, ex Telefunken design engineer, already built a 
>> class E amp
>> around 2x8 cheap SIHP10N40D transistors at less then 1 Euro each.
>> With 15W of drive output is 1200W.
>>
>> Even without predistortion IMD3 is less then -30dB.
>>
>> 20 transistors will do your legal limit easily.
>>
>> 73
>> Peter, DJ7WW
>>
>>
>> -----Original Message-----
>> From: Amps [mailto:amps-bounces at contesting.com] On Behalf Of Manfred
>> Mornhinweg
>>
>> - A high efficiency, high gain, deliberately non-linear, legal-limit
>> final stage. This might take the shape of a simple overdriven broadband
>>    class AB stage, or perhaps a class E stage with tuned, band-switched
>> output tanks. It might use a single BLF188XR for about $150, or several
>> small switchmode MOSFETs for far less money.
>>
>> To these hardware ingredients I would add some freely available
>> software, such as Pavel Denim's software for the Red Pitaya, plus
>> PowerSDR, using closed-loop, RF-feedback amplitude and phase
>> predistortion to linearize the amplifier. The software has this already
>> implemented.
>>
>> The result would be a legal-limit, high efficiency, high performance,
>> compact, black-box HF transceiver to be used with a PC, for under $1000
>> total cost, if you are good at ordering surplus power supplies on eBay,
>> and such.
>>
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>>
>>
>
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-- 
R. Kevin Stover
AC0H
ARRL
FISTS #11993
SKCC #215
NAQCC #3441


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