[Lowfer] LF Lop Antennas [AKA Loop Antennas]

[jrusgrove at comcast.net]

Chris

The 3586C model is probably the most convenient for this application since 
it has BNC connectors as opposed to the 'funky' tiny telco connectors. 
Tracking generator output is a levelled 0 dBm. When not being used in a test 
equipment capacity it makes an excellent LF receiver.

Jay


----- Original Message ----- 
From: "Chris Trask" <christrask at earthlink.net>
To: "Discussion of the Lowfer (US, European, &amp; UK) and MedFer bands" 
<lowfer at mailman.qth.net>
Sent: Tuesday, August 26, 2008 12:02 AM
Subject: Re: [Lowfer] LF Lop Antennas [AKA Loop Antennas]


>    I noticed that there are a few selective level meters available on 
> eBay,
> a pair of 3586's and a 3746A.  Does the 3746A provide a tracking signal? 
> I
> saw in the eBay photos that there's a BNC connector on the rear labeled
> "tracking generator".  Never understood what these level meters were used
> for, but if it can be used with my GR bridges here I might be inclined to
> acquire one.  I think there's one on the shelf at a local junk yard.
>
> Chris
>
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> ----- Original Message -----
> From: <jrusgrove at comcast.net>
> To: "Discussion of the Lowfer (US, European, &amp; UK) and MedFer bands"
> <lowfer at mailman.qth.net>
> Sent: Monday, August 25, 2008 7:03 PM
> Subject: Re: [Lowfer] LF Lop Antennas [AKA Loop Antennas]
>
>
>> In agreement with John...
>>
>> I have an HP 4342A Q meter, and while it works well for certain tasks,
> it's
>> not that useful for others. Measuring capacitors and low Q ferrite
> inductors
>> (plus a variety of other tasks) is best done with a bridge - like the GR
>> 516C that we're using.
>>
>> Marrying the bridge to an HP 3586C selective level meter makes a real 
>> nice
>> frequency agile setup. The tracking generator output serves as the
> generator
>> and the receiver is used as the detector. While not exactly 'portable' I
> do
>> lug the setup out to the transmit antenna from time to time. Wouldn't
> trade
>> that bridge for anything.
>>
>> Jay
>>
>> ----- Original Message -----
>> From: "John Andrews" <w1tag at w1tag.com>
>> To: "Discussion of the Lowfer (US, European, &amp; UK) and MedFer bands"
>> <lowfer at mailman.qth.net>
>> Sent: Monday, August 25, 2008 8:38 PM
>> Subject: Re: [Lowfer] LF Lop Antennas [AKA Loop Antennas]
>>
>>
>> > Jay and I have impedance bridges that can measure these kinds of caps 
>> > to
> 1
>> > pF, and series resistances to 0.1 ohms. But you'd have to pry our cold,
>> > dead hands from the bridges... <g>
>> >
>> > John A.
>> >
>> >
>> >> As I recall the Boonton instruction book describes a procedure which 
>> >> is
>> >> probably better than nothing but any decent capacitor is going to have
> Q
>> >> which is much higher than that of the test coil.
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