[Elecraft] NGEN - is it working?

[Don Brown]

Hi

You can use your K2 as a tester for the N-gen. Just use a probe made up of 
some RG58 connected to the antenna input of the K2 and install a small 
capacitor (around .01) in series with the probe end. You can then touch the 
probe to the zener diode cathode. You should hear an increase in the noise 
level on the K2. If that is good then move on the the MMIC the output there 
should increase on the S-meter of the K2. The circuit is so simple it just 
about has to be the battery the zener diode or the MMIC in that order

Don Brown




----- Original Message ----- 
From: "Nick Waterman" <laptop at noseynick.com>
To: "Elecraft Reflector" <elecraft at mailman.qth.net>
Sent: Sunday, January 29, 2006 11:23 AM
Subject: Re: [Elecraft] NGEN - is it working?


> John D'Ausilio wrote:
> > Noise increase should be unmistakable. Make sure the MMIC isn't in
> > backwards :)
>
> I was wondering if I'd mounted it "upside down", but as both the top and
> bottom leads are grounded, it looks as though, as long as the slanted
> lead is towards the centre of the board, I can't realistically get it 
> wrong.
>
> > If you have a key attached and happened to transmit
> > into it, just order replacement MMIC (get 3, about $10 delivered :)
> > from Elecraft.
>
> I'm an SSB guy, don't know CW YET. I don't have a key, I do have a PTT
> switch, but only recently... Basically...
>
> I built NGEN, XG1, DL1 without being able to test them. I built the K2
> and had no PTT or key connected. I transmitted into DL1 for the bandpass
> filter tweaking, but did no other transmitting until after building
> KSB2. I can be just about positive I've never transmitted into NGEN...
> And even if I had, it definitely wouldn't have been the FIRST thing I'd
> done to it, and as far as I can tell, NGEN has never worked, or at least
> not noticably.
>
> I'll try testing with AGC off, NGEN connected, and XG1 sat nearby on the
> bench so I have a signal to compare with my noise or lack thereof.
>
> If it still doesn't work, can I be fairly confident that it's the MMIC,
> or might it be the Zenner D2? Or indeed anything else? There's no "cheap
> and dirty signal tracing" or table of voltages for NGEN, is there?
>
> -- 
> "Nosey" Nick Waterman, G7RZQ, K2 #5209.
> use Std::Disclaimer;    sig at noseynick.net
> Half the people you know are below average.
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