[Elecraft] SDRPlay as panadapter

[Edward R Cole]

Like Wes-N7WS writes, I have a SDR-IQ and use Spectravue.  I have the 
SDR-IQ in parallel with my K3 looking at 28-MHz IF output from my 
transverters 144 thru 1296.  I mainly use the "Combo" display for 
watching 100-KHz of activity on 1296-eme or use the "Continuum" 
display for measuring sun noise vs cold sky to check dish 
performance.  But understand Ian's need to watch 250-KHz for crowded 
EU VHF contests.

I'd like to make an endorsement (OT) for Ian's Triode Board which he 
sells for high-power triode amplifiers.  It made building my 2m-8877 
possible as all bias, current and HV monitoring and overcurrent 
protection are handled, including warm-up delay timing.  If you are 
building a high power triode amp this IS the needed component.  My 
Triode board has faithfully run 1500w key-down JT65 for several 
years.  Thanks Ian.

Of course if you are running sspa it does not apply.

I hope to have a 1200w 2m LDMOS 2m linear (W6PQL-kit) running by 
spring so my 8877 linear and HVPS will be available for sale at that 
time (probably OT for this list).  Due to shipping size/cost I may 
part out the HVPS and 200-lb. HV transformer FS here in Alaska.

73, Ed - KL7UW

From: "Ian White" <gm3sek at ifwtech.co.uk>
To: "'Dave Fugleberg'" <dave.w0zf at gmail.com>,
         <Elecraft at mailman.qth.net>
Subject: Re: [Elecraft] SDRPlay as panadapter
Message-ID: <00cc01d33a06$63e5dda0$2bb198e0$@co.uk>
Content-Type: text/plain;       charset="us-ascii"

Hi Dave

I connect the SDRplay through a 3dB splitter at the 28MHz RX output of
the transverter. A hybrid splitter is used to maximize the isolation
between the SDR and the K3's receiver.

This method is used in preference to the internal 8.2MHz IF output of
the K3 because the transverter output port can deliver a higher
signal/noise ratio to the input of the SDR, which improves its ability
to display extremely weak VHF/UHF signals.

73 from Ian GM3SEK


73, Ed - KL7UW
   http://www.kl7uw.com
Dubus-NA Business mail:
   dubususa at gmail.com