Message	Date	From	Subject
9826	2014-03-16 02:34:36	parkerp	Re: binaural weekender
Yes it will receive am but it will be like tuning a DC RX - ie tuning very critical. You need to be spot on. Whereas a phasing ssb RX with one side suppressed will be easier. Peter vk3ye emrfd@yahoogroups.com wrote: >There are 3 messages in this issue. > >Topics in this digest: > >1a. Binaural Weekender? > From: sohosources >1b. Re: Binaural Weekender? > From: Thomas S. Knutsen >1c. Anyone a circuit for a Active High Impedance Scope Probe..? > From: radioaustralia123 > > >Messages >________________________________________________________________________ >1a. Binaural Weekender? > Posted by: sohosources@yahoo.com sohosources > Date: Sat Mar 15, 2014 10:20 am ((PDT)) > >Hi, gang, >Thinking about building a binaural weekender (BW), and I have a couple questions: >If anyone happens to know: > >1. Can KK7B's Binaural RX receive SSB and AM? I know it can RX CW, I suspect it can RX SSB, and I'm hoping for some facility with AM... > >2. The QST BW is set up for 40 meters, but in case I'd like to try other freqs, are the front-end and LO phase splitter Ls and Cs scalable? If so, are there "hard equations" or can I simply scale arithmetically? > >3. Can I optionally pass the I/Q audio to SDR software for computerized demod, or is the phase accuracy between the channels too "loose" for SDR (but just fine for between the ears)? > >Perhaps I'm way left of center, but I'm thinking about building a 9-MHz BW so I can experiment with it as the IF/audio sections of a Progressive RX, or with an FCC-2 DDS-controlled converter/mixer. > >Thanks, as always, > >--Kirk, NT0Z > > > > >Messages in this topic (3) >________________________________________________________________________ >1b. Re: Binaural Weekender? > Posted by: "Thomas S. Knutsen" la3pna@gmail.com la3pna > Date: Sat Mar 15, 2014 10:54 am ((PDT)) > >> >> 1. Can KK7B's Binaural RX receive SSB and AM? I know it can RX CW, I >> suspect it can RX SSB, and I'm hoping for some facility with AM... >> >SSB is no problem. > > >> >> 2. The QST BW is set up for 40 meters, but in case I'd like to try other >> freqs, are the front-end and LO phase splitter Ls and Cs scalable? If so, >> are there "hard equations" or can I simply scale arithmetically? >> >The equations are both shown in ch. 9 of EMRFD and in the hybrid coupler >paper on the CD with EMRFD. > >> >> 3. Can I optionally pass the I/Q audio to SDR software for computerized >> demod, or is the phase accuracy between the channels too "loose" for SDR >> (but just fine for between the ears)? >> >It should not be a problem, you may want to take the I/Q baseband signal >after the first amplifier, other than that, make sure your audio soundcard >have stereo input, most microphones are mono input. > >73 de Thomas LA3PNA. > >-- > > Please avoid sending me Word or PowerPoint attachments. > See <http://www.gnu.org/philosophy/no-word-attachments.html> >PDF is an better alternative and there are always LaTeX! > > > > >Messages in this topic (3) >________________________________________________________________________ >1c. Anyone a circuit for a Active High Impedance Scope Probe..? > Posted by: rodwall1234@gmail.com radioaustralia123 > Date: Sat Mar 15, 2014 11:38 pm ((PDT)) > >Hi, > > >Does anyone have a good circuit for a home built “Active High Impedance Oscilloscope Probe”? Looked on Ebay and they are expensive. > > >Thanks, > > >Roderick Wall, vk3yc. > > > >Messages in this topic (3) > > > > > >------------------------------------------------------------------------ >Yahoo Groups Links > > > >------------------------------------------------------------------------ >

Yes it will receive am but it will be like tuning a DC RX - ie tuning very critical. You need to be spot on. Whereas a phasing ssb RX with one side suppressed will be easier. Peter vk3ye

emrfd@yahoogroups.com wrote:

>There are 3 messages in this issue.
>
>Topics in this digest:
>
>1a. Binaural Weekender?
> From: sohosources
>1b. Re: Binaural Weekender?
> From: Thomas S. Knutsen
>1c. Anyone a circuit for a Active High Impedance Scope Probe..?
> From: radioaustralia123
>
>
>Messages
>________________________________________________________________________
>1a. Binaural Weekender?
> Posted by: sohosources@yahoo.com sohosources
> Date: Sat Mar 15, 2014 10:20 am ((PDT))
>
>Hi, gang,
>Thinking about building a binaural weekender (BW), and I have a couple questions:
>If anyone happens to know:
>
>1. Can KK7B's Binaural RX receive SSB and AM? I *know* it can RX CW, I suspect it can RX SSB, and I'm hoping for some facility with AM...
>
>2. The QST BW is set up for 40 meters, but in case I'd like to try other freqs, are the front-end and LO phase splitter Ls and Cs scalable? If so, are there "hard equations" or can I simply scale arithmetically?
>
>3. Can I optionally pass the I/Q audio to SDR software for computerized demod, or is the phase accuracy between the channels too "loose" for SDR (but just fine for between the ears)?
>
>Perhaps I'm way left of center, but I'm thinking about building a 9-MHz BW so I can experiment with it as the IF/audio sections of a Progressive RX, or with an FCC-2 DDS-controlled converter/mixer.
>
>Thanks, as always,
>
>--Kirk, NT0Z
>
>
>
>
>Messages in this topic (3)
>________________________________________________________________________
>1b. Re: Binaural Weekender?
> Posted by: "Thomas S. Knutsen" la3pna@gmail.com la3pna
> Date: Sat Mar 15, 2014 10:54 am ((PDT))
>
>>
>> 1. Can KK7B's Binaural RX receive SSB and AM? I *know* it can RX CW, I
>> suspect it can RX SSB, and I'm hoping for some facility with AM...
>>
>SSB is no problem.
>
>
>>
>> 2. The QST BW is set up for 40 meters, but in case I'd like to try other
>> freqs, are the front-end and LO phase splitter Ls and Cs scalable? If so,
>> are there "hard equations" or can I simply scale arithmetically?
>>
>The equations are both shown in ch. 9 of EMRFD and in the hybrid coupler
>paper on the CD with EMRFD.
>
>>
>> 3. Can I optionally pass the I/Q audio to SDR software for computerized
>> demod, or is the phase accuracy between the channels too "loose" for SDR
>> (but just fine for between the ears)?
>>
>It should not be a problem, you may want to take the I/Q baseband signal
>after the first amplifier, other than that, make sure your audio soundcard
>have stereo input, most microphones are mono input.
>
>73 de Thomas LA3PNA.
>
>--
>
> Please avoid sending me Word or PowerPoint attachments.
> See <http://www.gnu.org/philosophy/no-word-attachments.html>
>PDF is an better alternative and there are always LaTeX!
>
>
>
>
>Messages in this topic (3)
>________________________________________________________________________
>1c. Anyone a circuit for a Active High Impedance Scope Probe..?
> Posted by: rodwall1234@gmail.com radioaustralia123
> Date: Sat Mar 15, 2014 11:38 pm ((PDT))
>
>Hi,
>
>
>Does anyone have a good circuit for a home built “Active High Impedance Oscilloscope Probe”? Looked on Ebay and they are expensive.
>
>
>Thanks,
>
>
>Roderick Wall, vk3yc.
>
>
>
>Messages in this topic (3)
>
>
>
>
>
>------------------------------------------------------------------------
>Yahoo Groups Links
>
>
>
>------------------------------------------------------------------------
>