[HomeBrew] 6L6 coil power/heat limitations?

[wb8jkr@juno.com]

 I've had success using epoxy to glue a pill bottle
into the 8 pin tube bases that Antique Electronic
Supply sells. You just cut the bottom out of
the bottom of the pill bottle. Wound coils for
a regen receiver using this method and it
worked pretty well. I would image that small
PVC tubing could work as well.

73,  Mark WB8JKR

Member ARRL, QCWA, OTC, Society of Cable Telecommunication Engineers
WAS, WAC, WTO, DXCC, GJDXCC, VUCC 2M
Novice 3/71, General 8/72, Advanced 8/79, Extra 8/89
 


On Wed, 1 Jan 2003 16:42:44 -0500 (Eastern Standard Time) Helmut Usbeck
<vze2gmp4@verizon.net> writes:
> ** HOMEBREW REFLECTOR - Please do NOT cross-post messages to multiple 
> mailing lists on the "To:" or "CC:" line of the e-mail message. **
> 
> Greetings,
> I'm familiar with the AES coil forms.  The quality of these forms is 
> none
> too good.  After a couple of insertions into the coil socket it's 
> not
> unusual for the form to separate at the base.  I plan on contacting 
> them
> about it.  They do want to know about any problems with any of the
> products they sell and will do something about it.
> 
> Yes, coil forms and many other things that homebrewers need are not 
> all
> that available anymore.  Think about it.  How many people out there 
> need
> coil forms.  Not too many so it's really not economically sound for 
> a
> company to tool up for even a short production run.  And if they did 
> we'd
> be screaming about the price.  I've had pretty good results making 
> forms
> out of PVC tubing.
> 
> If your coils are heating up you definately have a problem with your
> design, high SWR, material selection or way too small a wire size.  
> They
> should not be heating up.
> For a 6L6 I wouldn't use anything smaller than #20, preferably #16 
> wire.
> Also I wouldn't be using a coil form, but a space wound coil.  These 
> can
> be mounted on a plastic strip and made "plug-in-able" with banana 
> jacks.
> 
> See if you can get your hands on a 1930's or 40's ARRL Handbook.
> 
> Regards,
> Helm.  WB2ADT


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