[Heathkit] HN-31 Cantenna

Fri, 15 Nov 2002 22:12:26 -0500

Not all AC resistors have inductive reactance.  The "new - modern" metallic
film, and definitely wirewound ones do.

Think about the older style carbon composition ones....

Not much inductive reactance there.

Same for the Globar ones usually used in dummy loads.  SPECIFICALLY
non-inductive.

It is simply a mis-application of DC resistance in reference to an RF
system.

We ALL make mistakes or oversights.

Bob - N0DGN

----- Original Message -----
From: "Mike Hyder -N4NT-" <[email protected]>
To: "R.J. Keller" <[email protected]>; <[email protected]>
Sent: Friday, November 15, 2002 6:26 PM
Subject: Re: [Heathkit] HN-31 Cantenna

> An AC resistor has no inductive reactance?  Can't be a wirewound?
>
> Mike N4NT
>
> ----- Original Message -----
> From: "R.J. Keller" <[email protected]>
> To: "Hamel Family" <[email protected]>; <[email protected]>
> Sent: Friday, November 15, 2002 6:07 PM
> Subject: Re: [Heathkit] HN-31 Cantenna
>
>
> > I actually do know it is for RF. Pray tell, what else?
> >
> > What is an AC resistor? I do not understand what you mean by "if you
> > want to use it as a DC resistor, just remember the difference" ?
> > 73, Dick KF4NS
> > St. Petersburg, FL
> > Keep the glow!
> >
> > ----- Original Message -----
> > From: "Hamel Family" <[email protected]>
> > To: "R.J. Keller" <[email protected]>
> > Sent: Friday, November 15, 2002 12:32 AM
> > Subject: Re: [Heathkit] HN-31 Cantenna
> >
> >
> > | The purpose of it is for RF.
> > | If you want to use it as a DC resistor, just remember the
> > difference.
> > | There were "improved versions" in the old Handbooks, the shield
> > around the
> > | resistor was tapered and supposedly better served the purpose of
> > circulating
> > | the oil by convection and providing the correct capacitance for the
> > exact 50
> > | ohms on VHF.
> > | ----- Original Message -----
> > | From: "R.J. Keller" <[email protected]>
> > | To: <[email protected]>
> > | Sent: Thursday, November 14, 2002 5:50 PM
> > | Subject: [Heathkit] HN-31 Cantenna
> > |
> > |
> > | > Has anyone ever replaced the resistor in the Cantenna?
> > | >
> > | > Does the DC resistance matter?
> > | >
> > | > The DC resistance is 43 ohms but when I put my MFJ Antenna
> > Analyzer on
> > | > it I get 50 ohms except on 10M which reads 80 ohms and 15M reads
> > 70
> > | > ohms.
> > | >
> > | > I am using mineral oil but it originally had that evil power
> > company
> > | > transformer oil.
> > | > 73, Dick KF4NS
> > | > St. Petersburg, FL
> > | > Keep the glow!
>
>
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