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LF: RE: 137 kHz project......Handy cost-saving tip

from [G4WGT - Gary] [Permanent Link][Original]
To: [email protected]
Subject: LF: RE: 137 kHz project......Handy cost-saving tip
From: "G4WGT - Gary" <[email protected]>
Date: Sat, 24 Jan 2004 19:45:14 -0000
Importance: Normal
In-reply-to: <000d01c3e212$ba8e9120$73338751@rogersservices>
Reply-to: [email protected]
Sender: <[email protected]>
Hi Jim & LF,
 
I am using a core from a VGA computer monitor scanning coil yoke for the core in my LF antenna matching transformer wound with 2.5 mm mains wire with 10 turns primary & 20 turns secondary  (tapped every other turn from turn 10), for matching to the loading coil & antenna & seems to work ok .
 
73
 
Gary - G4WGT
-----Original Message-----
From: [email protected] [mailto:[email protected]]On Behalf Of James Moritz
Sent: 24 January 2004 00:40
To: [email protected]
Subject: LF: 137 kHz project......Handy cost-saving tip

Dear Dick, LF Group,
 
Thinking of cheap sources of ferrite, I have used the cores from old computer monitor line output transformers for some time for supression purposes - but the type of ferrite they are made from is very similar to the 3C8/3C85/3C90 grades often used on LF PA circuits.
 
 
Cheers, Jim Moritz
73 de M0BMU
 
 
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