Re: KX3 - New 100 watt amp

Posted by Merv Schweigert on May 21, 2011; 5:08pm
URL: http://elecraft.85.s1.nabble.com/KX3-New-100-watt-amp-tp6383880p6389815.html

Seems it would not be difficult to make a auto band switching amp from
that,
relays for each band to swtich the LP filters driven by the K3 band
outputs,
at that power level relays are cheap,  like the ones used in the AD5X
ALS-600 QSK conversion.   cheap and handle the power easily.  Make up
a circuit board and an enclosure for the amp,  really nice set up.
Another nice thing is that you can drive it with almost no power,  not
being
limited by FCC regs (unless you sell them built)  you can even drive
something
like a  4  MRF-150 amp with less than 10 watts to 600 output.
73 Merv

> Although I enjoy building (obviously), it was cost that made my
> decision to buy the k3/10 vs. K3/100.  Then I discovered the CCI amp
> and that sealed my decision.  I will have a 300w amp for less than
> the cost of the KPA-100.
>
> It will not have auto-band changing and other niceties, just a brick
> amp.  I have a source for LP filters to add for all HF bands.
>
> I have not given up my thoughts of selling these assembled (or in
> other words assembling them for others).  I would add a
> nice  enclosure, metering, and band selection control, so there would
> be some enhancement of the basic kit.  I will not make any decision
> until I build one for myself and test it.
>
> 73, Ed
>
> ------------------------------------------------------------------
> Date: Fri, 20 May 2011 13:36:35 -0700
> From: "Ron D'Eau Claire"<[hidden email]>
> Subject: Re: [Elecraft] KX3 - New 100 watt amp
> To:<[hidden email]>
> Message-ID:<001201cc172d$9cf2b260$d6d81720$@biz>
> Content-Type: text/plain;       charset="us-ascii"
>
> The CCI components are very attractive. Before the KPA100 was released,
> several K2 owners reported good results with them. While many Hams today
> find their passion in hitting the top of the contest or DX lists, there are
> still a lot of us "home-brewers" who are equally passionate about cobbling
> together a bunch of parts to create a rig we enjoy operating.
>
> And, in the case of an amplifier, we home-brewers don't have the gain
> limitations and FCC approval requirements those who manufacture amps or kits
> for sale must meet.
>
> I've never owned a factory-built rig (although the K3 is *awfully* close!),
> and I've never built a rig to save money.
>
> For me, buying a factory-assembled rig would be like buying a jig-saw puzzle
> fully assembled and framed - it would miss the point of being a Ham for me,
> Hi!
>
> Ron AC7AC
>
>
>
>
>
> 73, Ed - KL7UW, WD2XSH/45
> ======================================
> BP40IQ   500 KHz - 10-GHz   www.kl7uw.com
> EME: 50-1.1kw?, 144-1.4kw, 432-100w, 1296-testing*, 3400-?
> DUBUS Magazine USA Rep [hidden email]
> ======================================
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