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Kirt Blattenberger - RF Cafe Webmaster

Copyright: 1996 - 2024
Webmaster:
    Kirt Blattenberger,

    BSEE - KB3UON

RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while tying up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrived...

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RF Cafe Forums closed its virtual doors in 2012 mainly due to other social media platforms dominating public commenting venues. RF Cafe Forums began sometime around August of 2003 and was quite well-attended for many years. By 2010, Facebook and Twitter were overwhelmingly dominating online personal interaction, and RF Cafe Forums activity dropped off precipitously. If the folks at phpBB would release a version with integrated sign-in from the major social media platforms, I would resurrect the RF Cafe Forums, but until then it is probably not worth the effort. Regardless, there are still lots of great posts in the archive that ware worth looking at.

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wtbap22
 Post subject: Dielectric Goop
Posted: Thu Dec 24, 2009 10:50 am 
 
Lieutenant

Joined: Thu Dec 24, 2009 10:34 am
Posts: 1
I have been quite happy using RTV (as a dielectric) to tune and align filters/circuits for some time now. My company has informed me that I can no longer use this substance because it has undesirable side-effects when used in a hybrid construction environment (this is due to the silicone content).

Does anyone know of an alternate high dielectric substance that is Silicone free?

Thank you in advance-
wtbap22


 
   
 
nubbage
 Post subject: Re: Dielectric Goop
Posted: Thu Jan 21, 2010 5:52 am 
 
General
User avatar

Joined: Fri Feb 17, 2006 12:07 pm
Posts: 218
Location: London UK
Hi
there are some fluid cement goop type products that are high in polystyrene. These are sold for example to model-making freaks like Kirt and me.
The plastic blob when set should have a low loss permittivity around 2.2

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Posted  11/12/2012
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