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Thread: Tuners ... are they all pretty much the same ?

  1. #81
    Join Date: Apr 2012

    Location: Southall, West London

    Posts: 24,023
    I'm Geoff.

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    Bev. Where you are, the FM reception is probably quite decent. Try just a reasonable length of wire to get you started.
    Mr. Tact!

    Main system: MMs/ADCs/Low output MC's/One rare Japanese SUT/One scarce British phono stage/various tonearms/hefty Japanese DD TT and hefty Japanese BD TT and small British BD TT. 4 CD players/2 jitter buster/2 DACs/Valve buffer. TVC stepped attenuator or valve pre-amp or solid state pre-amp. Current dumping power-amp or either of two Class A SS power-amp or Class A EL34 valve monos or big Japanese (part Class A) integrated. Big dual concentric speakers/Smaller dual concentric speakers/Two way British compacts and full range speakers, amongst others. And too much more to list!

  2. #82
    Join Date: Aug 2012

    Location: Sunny Portsmouth

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    Quote Originally Posted by walpurgis View Post
    Bev. Where you are, the FM reception is probably quite decent. Try just a reasonable length of wire to get you started.
    Thanks Geoff... I have no idea if Portsmouth has a decent FM reception or not but the car FM seems pretty good.. I just need to find a coax plug somewhere and as you say a length of coax wire might be enough to start with

    Pioneer DV-717 x 2 or Pioneer PD-S505 Precision (Tom Evans Tuned) or Marantz CD50 SE or Arcam DV79 Through: SLIC Innovations Digi Coax To: Audio Note Dac One 1x Signature Through: SLIC Innovations Eclipse C RCA To: Audio Note Oto SE Through:TQ Ultra Black Speaker Cable To: Rega RS3's or Living Voice Auditoriums


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  3. #83
    Join Date: Apr 2012

    Location: Southall, West London

    Posts: 24,023
    I'm Geoff.

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    Poke the wire into the hole in the middle of the socket where the centre pin of the coax plug goes. Should work!
    Mr. Tact!

    Main system: MMs/ADCs/Low output MC's/One rare Japanese SUT/One scarce British phono stage/various tonearms/hefty Japanese DD TT and hefty Japanese BD TT and small British BD TT. 4 CD players/2 jitter buster/2 DACs/Valve buffer. TVC stepped attenuator or valve pre-amp or solid state pre-amp. Current dumping power-amp or either of two Class A SS power-amp or Class A EL34 valve monos or big Japanese (part Class A) integrated. Big dual concentric speakers/Smaller dual concentric speakers/Two way British compacts and full range speakers, amongst others. And too much more to list!

  4. #84
    Join Date: Aug 2012

    Location: Sunny Portsmouth

    Posts: 5,542
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    Quote Originally Posted by walpurgis View Post
    Poke the wire into the hole in the middle of the socket where the centre pin of the coax plug goes. Should work!
    Thanks Geoff I will give that a go..

    Pioneer DV-717 x 2 or Pioneer PD-S505 Precision (Tom Evans Tuned) or Marantz CD50 SE or Arcam DV79 Through: SLIC Innovations Digi Coax To: Audio Note Dac One 1x Signature Through: SLIC Innovations Eclipse C RCA To: Audio Note Oto SE Through:TQ Ultra Black Speaker Cable To: Rega RS3's or Living Voice Auditoriums


    Be nice to people, you MAY get some of it back when you need it most....

    "Smile, it's free therapy"
    "This week I will mostly be listening to music"

  5. #85
    Join Date: Jul 2016

    Location: Welsh Borders

    Posts: 189
    I'm Gary.

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    If you PM me with your address, Bev, I'll pop a 300 Ohm aerial (that's the plastic "T" ribbon) in the post to you. I have a spare, so you may as well have it. I don't think you will get anywhere using a length of coax wire as a makeshift aerial, unless you remove it from its braided wire sheath first. I think that sheath is designed to stop the wire picking up any airborne signals from outside. Cheers. Gary.

  6. #86
    Join Date: Sep 2013

    Location: North Island New Zealand

    Posts: 722
    I'm Chris.

    Default Dimension of antenna cable and tuning

    Quote Originally Posted by walpurgis View Post
    Bev. Where you are, the FM reception is probably quite decent. Try just a reasonable length of wire to get you started.
    If just using wire make a dipole with dimensions depending on frequency of reception calculated here: http://www.procato.com/calculator-wavelength-frequency/
    good result is had with either a 5/8th or 1/2 wavelength dipole - because you are maximising reception of the voltage leaving the transmission antenna
    A dipole with 852mm in each half provides the lowest frequencies - as well as higher ones, but follow the calculator if you have a favorite station you
    want to specifically receive.

    A 300 ohm antenna follows a stated distance of one conductor to the next over the length of cable not spread out, vs a 50 or 75 ohm coax
    that has a smaller dimension from inner to outer. The length not spread out then assists getting the signal from the section of antenna spread out
    to your tuner. You can help by placing this cable on the right labeled antenna connection at the rear of your tuner.

    Next,ideally you need to also know the stations polarity of transmission. in fairly flat areas it is likely to be horizontal, and hilly areas vertical. Some stations
    waste enormous power trying to cater for both with what is called circular polarization . Accordingly orientate your antenna to suit their polarity.

    If wanting many frequencies and omnidirectional reception and importantly an antenna with good impedance matching - which then maximises transfer across a
    coax cable with stated impedance a discone is a good all round ( excuse the pun ) answer. Invented by Armig Kandoian they have many much needed
    properties including dimensions less than 1/2 wavelength , 10 to 1 bandwidth and excellent impedance matching to 50 ohms which is the broadcast impedance standard.
    Accordingly if using this antenna use 50 ohm coax not 75 ohm.

    But for now a wire dimensioned correctly will do.

    Cheers / Chris

  7. #87
    Join Date: Aug 2012

    Location: Sunny Portsmouth

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    Quote Originally Posted by Infinitely Baffled View Post
    If you PM me with your address, Bev, I'll pop a 300 Ohm aerial (that's the plastic "T" ribbon) in the post to you. I have a spare, so you may as well have it. I don't think you will get anywhere using a length of coax wire as a makeshift aerial, unless you remove it from its braided wire sheath first. I think that sheath is designed to stop the wire picking up any airborne signals from outside. Cheers. Gary.
    You are so kind Gary.. PM sent

    Pioneer DV-717 x 2 or Pioneer PD-S505 Precision (Tom Evans Tuned) or Marantz CD50 SE or Arcam DV79 Through: SLIC Innovations Digi Coax To: Audio Note Dac One 1x Signature Through: SLIC Innovations Eclipse C RCA To: Audio Note Oto SE Through:TQ Ultra Black Speaker Cable To: Rega RS3's or Living Voice Auditoriums


    Be nice to people, you MAY get some of it back when you need it most....

    "Smile, it's free therapy"
    "This week I will mostly be listening to music"

  8. #88
    Join Date: Aug 2009

    Location: Staffordshire, England

    Posts: 15,872
    I'm Martin.

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    Quote Originally Posted by Light Dependant Resistor View Post
    Next,ideally you need to also know the stations polarity of transmission. in fairly flat areas it is likely to be horizontal, and hilly areas vertical. Some stations
    waste enormous power trying to cater for both with what is called circular polarization . Accordingly orientate your antenna to suit their polarity.

    If wanting many frequencies and omnidirectional reception and importantly an antenna with good impedance matching - which then maximises transfer across a
    coax cable with stated impedance a discone is a good all round ( excuse the pun ) answer. Invented by Armig Kandoian they have many much needed
    properties including dimensions less than 1/2 wavelength , 10 to 1 bandwidth and excellent impedance matching to 50 ohms which is the broadcast impedance standard.
    Accordingly if using this antenna use 50 ohm coax not 75 ohm.
    That's interesting. When I had an aerial out up I wanted a full element thing but the installer recommended a circular array due to the way stations are broadcast in this area. Which has a lot of hills and ridges. That must be why. He did explain but his explanation made no sense to me.
    Martin



    Current Lash Up:

    Technics SL1200 with Sumiko h/s & Nagaoka MP50 * Firebottle valve MM phono stage * Parasound CDPi1000 * NVA P90SA passive pre / Krell KSA50S Power amp * JM Lab Electra 926 loudspeakers *



    "I hate to advocate drugs, alcohol, violence, or insanity to anyone, but they've always worked for me." - Hunter S Thompson

  9. #89
    Join Date: Aug 2009

    Location: Staffordshire, England

    Posts: 15,872
    I'm Martin.

    Default

    Quote Originally Posted by Light Dependant Resistor View Post
    Next,ideally you need to also know the stations polarity of transmission. in fairly flat areas it is likely to be horizontal, and hilly areas vertical. Some stations
    waste enormous power trying to cater for both with what is called circular polarization . Accordingly orientate your antenna to suit their polarity.

    If wanting many frequencies and omnidirectional reception and importantly an antenna with good impedance matching - which then maximises transfer across a
    coax cable with stated impedance a discone is a good all round ( excuse the pun ) answer. Invented by Armig Kandoian they have many much needed
    properties including dimensions less than 1/2 wavelength , 10 to 1 bandwidth and excellent impedance matching to 50 ohms which is the broadcast impedance standard.
    Accordingly if using this antenna use 50 ohm coax not 75 ohm.
    That's interesting. When I had an aerial put up I wanted a full element thing but the installer recommended a circular array due to the way stations are broadcast in this area. Which has a lot of hills and ridges. That must be why. He did explain but his explanation made no sense to me.
    Martin



    Current Lash Up:

    Technics SL1200 with Sumiko h/s & Nagaoka MP50 * Firebottle valve MM phono stage * Parasound CDPi1000 * NVA P90SA passive pre / Krell KSA50S Power amp * JM Lab Electra 926 loudspeakers *



    "I hate to advocate drugs, alcohol, violence, or insanity to anyone, but they've always worked for me." - Hunter S Thompson

  10. #90
    Join Date: Jul 2009

    Location: Hampshire, UK

    Posts: 1,813
    I'm Buriedunderaloadofturntables.

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    Quote Originally Posted by Ninanina View Post
    Thanks Geoff... I have no idea if Portsmouth has a decent FM reception or not but the car FM seems pretty good.. I just need to find a coax plug somewhere and as you say a length of coax wire might be enough to start with
    You're just across the water from the transmitter at Rowridge. You should get pretty much full signal with a piece of wet string stuck in the aerial socket!
    Adam.

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