[HBR] WTB coil forms

[Bill Fizette]

Hi Dan,

A pleasure to make your acquaintance, and to receive your interesting 0.02 
worth.

I do have a Heath Q meter, along with the calibration coil, and have used it 
in the past for various inductance measurements.  And out in the barn I have 
a Boonton Q meter, model number unknown right now, but it is a heavy beast 
and would need work to make it useable.  So for now it stays there.

Re the Krylon, I somewhere got the message that it was OK to use.  My thanks 
for confirming that.  I never liked using Ted's idea of Duco cement...And I 
have the clear forms that were in the original specs for the #5 HBR that I 
am working on right now.  Never liked them either...they are much too 
fragile.  But over time I have learned a few tricks on how to handle them, 
so they will work.

Dan, out of curiosity, if I measure the coil, what do I do with the 
information?  A visual will, or should, tell me if there are any mistakes, 
and without some frame of reference (In Ted's literature, perhaps?) I wonder 
what the Q value will tell me.  Forgive my lack of knowledge here...my ham 
background is mostly self taught, with life sciences my training.

The HBR receiver and its story is a phenomenon for sure.  I was taken with 
it from day one, and am not surprised that a cult has grown up around the 
radio.

73, Dan, and Happy New Year,

Bill  W2DGB



----- Original Message ----- 
From: <Hopperdhh at aol.com>
To: <hbr at mailman.qth.net>
Sent: Tuesday, December 31, 2013 8:42 AM
Subject: Re: [HBR] WTB coil forms


>
> Hi Bill,
>
> I know this was addressed to Breck, but I'd like to throw in my $.02.
>
> I have a Boonton 260-A Q-Meter and have measured coils before and after
> spraying with a pretty heavy coat of Clear Krylon and could measure no
> difference.  This was on coils with Q of about 200, so I'd say its fine to 
> use.
> It has very little solids, so it take quite a heavy coat to  leave much
> behind.  In my case it was on paper/cardboard formers, and  it held the 
> wire
> nicely as well as added some strength to the formers.  It  also dries 
> quickly
> which is nice.
>
> Its always a good idea to measure the Q of any coil you wind.  A  Q-Meter
> is a great piece of test gear.
>
> Dan K9WEK
>
>
>
> In a message dated 12/30/2013 8:03:30 P.M. Eastern Standard Time,
> w2dgb at ptd.net writes:
>
> Breck,
>
> Many thanks for re-presenting your section on winding  HBR coils.  There 
> is
> a
> wealth of information here and it will  certainly make life easier for
> those
> contemplating taking on the  project.  I know that I have number of HBR
> coils
> to wind, and I have  been putting it off.  Reading this material again, as
> upgraded, has  given me a bit of a push.
>
> One question:  With time the turns  sometimes loosen as the Cu wire
> stretches
> and expands and contracts.   I have been wondering what you recommend to
> keep
> the turns in place after  winding.  I know Crosby used Duco or some such
> cement in ribbons down  the coil windings, but I am considering giving the
> whole coil a spritz of  Krylon Clear.  Thoughts?
>
> Happy New Year, Breck, and thanks  again.
>
> 73,  Bill   W2DGB
>
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