[ARDF] [Melb-ARDF] Fwd: The Case of Missing SI box 101

[Bryan Ackerly]

I think I have some recollection about being able to hunt these things (at very close range) on the 12th harmonic. (144MHz)

Bryan Ackerly
Sent from my iPad.
(Apologies in advance for autocorrect errors)

On 05/09/2012, at 10:46 AM, Matthew Robbins <cedarcreek at gmail.com> wrote:

> I pulled my Icom 706 (MkIIG) out of a storage box and tuned it around
> 125kHz. I was able to hear some hash when I stuck the end of the SI box
> over the short antenna wire.  No oscillator.
> 
> I looked at a BSF7 (new style large) unit and the crystal seems to be a
> brass thing with no frequency markings. I got out some old BSF6 (old large
> style) units and their crystal was 12.000 MHz.
> 
> I can hear an oscillator (BSF7) when I tune around 12.000 MHz, but I can't
> be sure it is the SI box. I think it gets louder when I get closer, but I'm
> not sure. I can definitely hear hash when I put the coil in the SI unit
> over the short wire antenna, and I can hear hash when I punch it, but it's
> not a clear, obvious indication like you get with working ARDF gear.
> 
> I took a whole box of 21 units and moved it around the little antenna but
> no obvious "for sure" indication. It's probably a mistake that I have 50
> units (off) about 4m away from all this.
> 
> It would be nice to verify the crystal frequency on a BSF7 or BSF8 (again,
> the thing that looks like the crystal on the board has no markings I can
> see).
> 
> Matthew
> 
> On Tue, Sep 4, 2012 at 7:57 PM, Mark Besley
> <mark.besley at sidrasolutions.com>wrote:
> 
>> I think ARDF have five units and the normal clear/start/finish.  I could
>> have a look for them in the next day or two when I drop the controls and
>> other gear back after tonight’s event.****
>> 
>> ** **
>> 
>> Mark****
>> 
>> ** **
>> 
>> *From:* Ian Dodd [mailto:idodd at iinet.net.au]
>> *Sent:* Wednesday, 5 September 2012 9:58 AM
>> *To:* melb-ardf at lists.id.oz.au
>> *Subject:* Re: [Melb-ARDF] Fwd: The Case of Missing SI box 101****
>> 
>> ** **
>> 
>> I would be impressed if someone can find it using ARDF gear.****
>> 
>> ****
>> 
>> *Can we get one or two units to verify the concept and check the range?* *
>> ***
>> 
>> ** **
>> 
>> AR has a couple of units but are they in Bruce's garage?  I only have
>> OV#132 which is nearly flat (just enough juice to beep the flat battery
>> signal).  I do have plenty of the mobile-phone shaped units at home (DR
>> SIME) which I think have basically the same inerds as the OV rectangular
>> units.  All the OV units are with Kath Liley being placed out for the
>> coming Vic Champs.****
>> 
>> ****
>> 
>> Regards
>> Ian Dodd****
>> 
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