[minima] Re: A linear for the Minima
- From: "Julio Jimenez" <ak4vl.qrp@xxxxxxxxx>
- To: minima@xxxxxxxxxxxxx
- Date: Mon, 24 Feb 2014 06:29:55 -0800 (PST)
I just finished this amplifier last night (W6JL). Paired with the KX3 I
quickly had a QSO with EA8DAO receiving a 58 sig report with a modest antenna.
Super excited about this amp.
I've been lurking in this group for the past month after hearing about the
Minima project. Now that I'm done with the amp I will start on the minima and
hopefully have this amp on the business-end of the rig.
Thank you all for all the great posts, so much good information that I've
created a minima folder in my email, packed with stuff I will most likely
reference again during the build.
VY 73
Julio Jimenez, AK4VL
—
Sent from Mailbox for iPhone
On Mon, Feb 24, 2014 at 9:13 AM, Kevin Williams <k.p.williams@xxxxxxxxxxxx>
wrote:
> The amp I’m building is the W6JL design that won the ARRL homebrew contest a
> couple of years ago, (see attachment) it was designed to run on 40m but does
> work on the higher bands albeit with reduced power, it’s not too dissimilar
> to the amp that Farhan mentioned in an earlier post.
> As you say Paulo, these devices do work very well indeed on the low bands but
> they do work on the high bands also.
> Kevin GW4WOV
> From: Paolo Cravero
> Sent: Monday, February 24, 2014 1:20 PM
> To: minima@xxxxxxxxxxxxx
> Subject: [minima] Re: A linear for the Minima
> About input gate capacitance, we are talking about:
> IRF510, 135 pF typ
> IRFZ24: 370 pF typ
> IRFZ44: 1770 pF typ
> While the latter two may be OK for 160/80 and maybe 40 m bands, driving them
> on higher bands will be hard (too low impedance, see what Farhan wrote
> yesterday).
> What I love about this linear is that it can be built and tested while
> waiting for Minima PCBs to arrive. Since we're dealing with higher level RF I
> am afraid a PCB might require few revisions before becoming 100% stable and
> reproductible. A Manhattan style is probably better for the unexperienced.
> Mr Farhan, I hope you will publish a picture of existing Minima Linear(s), as
> a guidance for those that will begin building it right away.
> 73,
> Paolo IK1ZYW
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