[Elecraft] K3: 630m amplifiers

[Tom Azlin W7SUA]

OK on all the thread.

Ed, Yes, I am interested in following your linear amplifier project.

73, tom w7sua

On 7/27/2015 10:43 AM, Edward R Cole wrote:
> To catch up on the comments I address all that I have so far:
>
> Re: linear vs class-C is really a moot point as its easy enough to build
> a linear at 500-KHz.  CW, JT65, FSK all do fine with class-C, of
> course.  And its true that any modulation of a continuous carrier will
> impart some bandwidth.  Its not likely that wide-band digital modes will
> be approved in a band that is only 7-KHz wide so probably those approved
> would work with a class-C amp.  I think its just simpler to provide
> class-AB then its a non-issue.
>
> Re: 15-dB HF linear amp gain limit.  If that is applied to 630m amps
> then either I sell a kit or partial kit.
> 1mw in to 1w out is 30-dB and 100w out is 50-dB.  I would have to
> research the regs to see if the limit is for a certain level of input
> (like 5w).  Also the regs allow hams to sell amps to other hams without
> this restriction (but at what quantity per year?).
>
> First off I am not proposing to go into competition with MFJ.  This is
> just a home business building one at a time.  If the FCC is going to
> make this a small (tiny) business killer than its just not worth the
> bother. If I say more than this it will get political and that is OT.
>
> 73, Ed - KL7UW