Jump to content



Photo

GF-9191 Shield Plate Replacement?

GF-9191 Sharp GF-9191 Foil Antenna Internal Antenna

  • Please log in to reply
4 replies to this topic

#1 mcroce

mcroce
  • Members
  • 5 posts

Posted 09 February 2019 - 08:18 PM

Hi, I just bought a fairly good condition Sharp GF-9191H off of eBay.

 

I've gotten it completely disassembled to clean it up.

 

During the disassembly, the cardboard backed shield plate on the inside of the device came off a little worse for wear - it's probably still usable, but I'd like to replace it if possible.

 

Does anyone know of a source to replace them, or can I make one with aluminum foil and cardboard cut to the right shape?

 

Thanks!

Matt



#2 Fatdog

Fatdog
  • Administrators
  • 10,806 posts
  • LocationMiddle Tennessee, U.S.A.

Posted 12 February 2019 - 05:32 PM

Does anyone know of a source to replace them, or can I make one with aluminum foil and cardboard cut to the right shape?

 

Thanks!

Matt

That might be your best bet.  I don't know what cheap cardboard they used back then, but some of those shields just disintegrate if you breathe on them the wrong way.



#3 mcroce

mcroce
  • Members
  • 5 posts

Posted 14 February 2019 - 05:18 PM

Thanks! Also, can anyone explain exactly what is being shielded from what?

#4 Fatdog

Fatdog
  • Administrators
  • 10,806 posts
  • LocationMiddle Tennessee, U.S.A.

Posted 24 February 2019 - 10:44 AM

I found out recently, because of this topic, that the foil on cardboard isn't necessarily a shield.  A lot of times it was an internal antenna to help with AM or SW reception.  How about that.  :cool:



#5 Superduper

Superduper
  • Boomus Fidelis
  • 6,867 posts
  • LocationSomewhere over the rainbow, USA

Posted 24 February 2019 - 04:11 PM

I found out recently, because of this topic, that the foil on cardboard isn't necessarily a shield.  A lot of times it was an internal antenna to help with AM or SW reception.  How about that.  :cool:

 

Where'd you hear that Bobby, I'd be interested to see it if such a topic exists.  In this case, it's virtually certain to be an RF shield, as it's grounded and a flat plate makes a horrible AM or SW antenna & being right above a circuit board, would probably pick up all kinds of electrical noise, except the actual radio signal you will be wanting.





Also tagged with one or more of these keywords: GF-9191, Sharp GF-9191, Foil, Antenna, Internal Antenna