[HBR] WTB coil forms

[Bill Fizette]

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

----- Original Message ----- 
From: "B. Smith" <smithab11 at comcast.net>
To: <hbr at mailman.qth.net>
Sent: Monday, December 30, 2013 11:16 AM
Subject: Re: [HBR] WTB coil forms


>A discussion of various alternate coil forms can be found:
> http://k4che.com/HBR/RF%20Mixer%20Osc%20Band%20Coils%20Page%201.htm
>
> On 12/30/2013 11:10 AM, cemilton at aol.com wrote:
>> GM to the list and HAPPY NEW YEAR TO ALL.
>>
>> I'm new to this reflector but have spent some time in the archives 
>> "catching up" on tales of the HBR.
>>
>> I recently acquired an HBR-16 with one set of coils for 40m.  This 
>> particular set was built w/o an on-board power supply and doesn't have a 
>> calibrator. (I'll be using an external supply and will add the calibrator 
>> circuit later)
>>
>> The chassis is a work of art and I didn't have the heart to cannibalize 
>> the rig and start from the beginning.  So, I've re-worked the existing 
>> chassis and made component upgrades where needed.  At this juncture, the 
>> rig is working nicely on 40m.  I still have a new front panel to 
>> fabricate for the Eddystone dial and an S-meter.
>>
>> I'd like to add at least 80m and 20m (in that order) but alas, no coil 
>> forms.  At least not the American Phenolic 24-5p originals.  I'm guessing 
>> these are pretty much un-obtainable but I need to ask.   If anyone has 
>> any, even one, I'd be interested in purchasing them.  I have the APC caps 
>> so I only need serviceable coil forms.
>>
>> I'm aware of the use of PVC and even pill bottles so I know there is an 
>> "out" if I cannot find some originals.
>>
>> I do have a question of the group.  I have four BUD forms, the ribbed 
>> type with 5 pins.  And they measure the requisite 1.25" diameter. 
>> However, I'm not sure just how well these work when compared to the 24-5p 
>> ones.  I used the microwave oven for 5 seconds to see if they heated up. 
>> Well, not as much as some older 1920's forms but more than the clear 
>> plastic.  So, I'd expect a somewhat higher Q with the clear ones versus 
>> any others.  Am I off-base on this??  I'd sure appreciate any comments. 
>> If anyone has experience with the BUD ribbed forms in an HBR please let 
>> me know your thoughts/experiences.
>>
>> Thanks, All, for the BW and for reading this over.
>>
>> Best to all in the New Year.
>>
>> 73
>> Chuck
>> W4MIL
>> Palm Coast, FL
>>
>>
>>
>>    チャーリー ミルトン
>>
>>
>>   ______________________________________________________________
>> HBR mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/hbr
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:HBR at mailman.qth.net
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>
> ______________________________________________________________
> HBR mailing list
> Home: http://mailman.qth.net/mailman/listinfo/hbr
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:HBR at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html