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Re: Re[2]: LF: IDC-136-BLT 136kHz receivers

To: <[email protected]>
Subject: Re: Re[2]: LF: IDC-136-BLT 136kHz receivers
From: "Graham" <[email protected]>
Date: Thu, 4 Jun 2015 17:26:35 +0100
Importance: Normal
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Amplified   pre  selector  and  one of the  £5  usb  stick's  in direct sample ,  ala   0.001 uF  to  the  A/D ..Can pay £$£ more ,  but  these  take a  lot  of  beating ..
Amp  gain , say   10 dB  , output   Z  round  200  ohms 
sdr-sharp  gives  full  access  to the  dongle   manual  gain and   agc  etc
Even  no  pre-amp  , looking  at the   Tx tuner ,  puts  up a good  job
Simons  multi  session  sdr-console ,   gives   true multi  mode  , multi  qrg  monitoring , but may need  a  convertor
Put any  cash out lay  into  the   pre selector  and  pre-amp  ..

Sent: Thursday, June 04, 2015 2:30 PM
Subject: Re: Re[2]: LF: IDC-136-BLT 136kHz receivers

No, a completely different approach.  For one thing teh LO has to be supplied at 4*

Someone must do an LF version of the Softrock - surely


On 4 June 2015 at 14:25, Chris Wilson <[email protected]> wrote:
Hello Andy,

Thursday, June 4, 2015

> AH, thanks for finding that - must have missed it on first looking.
> Yes I agree, the NE612 is a poor mixer to use for those purposes.  
> A diode ring, or bus switch would do a muxch better job

> But why not an I/Q conversion and make use of all the decent SDR software out there?   

> Andy  G4JNT

I  think  they  also  do  an  IQ  version, not sure if it's currently
available.  I  don't  suppose  the  other  IC  is a direct swap is it?

Best regards,
 Chris                            mailto:[email protected]

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