[Milsurplus] ARB Antenna capacitor

[J. Forster]

My schematic is a poor copy and component numbers are just blurrs. Does
that mean that the internal R||C is left floating at the At Terminal?

-John

=================


> On 12/9/2013 2:26 PM, J. Forster wrote:
>> Between which terminals on the ARB is the cap connected? And where is
>> the
>> antenna usually connected?
>
> The capacitor hangs off of the fixed antenna terminal (Asubf) location
> with a through screw holding it onto the insulated antenna terminal
> board on the receiver.  The end of the capacitor that hangs out in mid
> air is then connected to the receive antenna relay of the transmitter.
>
> I rather like Mike N4FS' thought on this.  It would make it less finicky
> than suppressing a local oscillator signal, which I seem to recall is what
> they did on the RAX-1 receiver antenna daisy chain.
>
>
>>> Not exactly Hue. "Suckout" happens when to circuits are connected to
>>> each
>>> other and are both resonant at the same frequency. Like in the case of
>>> multiple receivers in parallel fed by the same antenna. If some were
>>> tuned
>>> to the same frequency, there would be considerable attenuation observed
>>> in
>>> both. The capacitor could have been inserted to minimize coupling
>>> between
>>> receivers, hence minimize the effects of "suckout". As Mike H. was
>>> saying,
>>> I
>>> too am only speculating. While "suckout" is real, I am just speculating
>>> that
>>> the capacitors were there to minimize the effect. 73 - Mike
>>>
>>> Mike B. Feher, N4FS
>>> 89 Arnold Blvd.
>>> Howell, NJ, 07731
>>> 732-886-5960
>>>
>>> -----Original Message-----
>>> From: milsurplus-bounces at mailman.qth.net
>>> [mailto:milsurplus-bounces at mailman.qth.net] On Behalf Of Hue Miller
>>> Sent: Monday, December 09, 2013 1:17 PM
>>> To: milsurplus at mailman.qth.net
>>> Subject: Re: [Milsurplus] ARB Antenna capacitor
>>>
>>> Yes, i think that's along the lines of what i was thinking. WIth all
>>> the
>>>
>>> additional capacitance to ground otherwise seen right at the ARB
>>>
>>> antenna.
>>>
>>> -Hue
>>>
>>>
>>>> From: n4fs at eozinc.com
>>>> To: kargo_cult at msn.com; milsurplus at mailman.qth.net
>>>> Subject: RE: [Milsurplus] ARB Antenna capacitor
>>>> Date: Mon, 9 Dec 2013 09:41:21 -0500
>>>>
>>>> What about simply, minimizing the effects of "suckout". 73 - Mike
>>>>
>>>> Mike B. Feher, N4FS
>>>> 89 Arnold Blvd.
>>>> Howell, NJ, 07731
>>>> 732-886-5960
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>>
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