[R-390] Filters

[ka9egw1 at britewerkz.com]

I've heard of magnetos needing their magnets remagnetized, could that be
any kind of a factor here?

> So if not PTFE, what sort of coax was he speaking of, do you suppose?  Is
> there a 'special' teflon good to extreme temps?  Would that be the stuff
> used in PTFE-dielectric PL-259's?  Or was he maybe just exaggerating in
> the interest of emphasizing a point that Teflon is harder to melt than,
> say, polyethlyene?
>
> <NOW I'm confused>
> 73, Brian KA9EGW
>
>> Hi
>>
>> Most teflon is rated to about 450 to 550 F.  You can indeed melt it with
>> a
>> torch.
>>
>> Bob
>>
>> On Feb 16, 2013, at 11:24 AM, KA9EGW <ka9egw1 at britewerkz.com> wrote:
>>
>>> If it is actually teflon, good luck trying to get it to melt.  Years
>>> ago
>>> when I was a Novice, WA9TIR told me [speaking in praise of
>>> Teflon-dielectric coax] "you can get that stuff glowing red and it
>>> won't
>>> melt".  Whehter he was exaggerating I know not.
>>>
>>> if it's polyethylene, good luck keeping it from melting.
>>>
>>>
>>> On 2/16/2013 8:00 AM, quartz55 wrote:
>>>> I've got some 1/2" hardline.  Wonder if I could cut out enough teflon
>>>> foam or whatever that dielectric is to use for the filter spacer?
>>>> Then
>>>> how do you keep it from melting when soldering back together?  Or like
>>>> someone said, use JB Weld.
>>>>
>>>> I've already sent the IF output (16KHz) to an SRA-3 mixer to mix the
>>>> 455 down to 12KHz and fed it into my soundcard, used 'Dream' to
>>>> demodulate it.  I made up a 467KHz oscillator to drive the mixer. It
>>>> seems to work, but is a pain to work with.  I couldn't seem to get the
>>>> Radio Mondiale to demodulate, but then was not sure I had the signal.
>>>>
>>>> BTW I put the Fluke ohmeter on some of that foam used to put ICs into.
>>>> It measures about 2Meg at 1/4" spacing, about 3Meg at 1".  Don't think
>>>> that's a good solution.
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>
>
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