Transformer for PA
 

Hello,

I'm building the "FARA"amplifier (QST June 2003).
Unfortunately, I 'm not able to get the T-3/4 cores, so I wonder whether I
couldn't take two ferrite cores used to avoid the RFI made by the wiring of
computers ?
Obviously, I will try it but I would like to get some advices before...

73 Daniel

Transformer for PA
 

"5itu" wrote in message
...
Hello,

I'm building the "FARA"amplifier (QST June 2003).
Unfortunately, I 'm not able to get the T-3/4 cores, so I wonder whether I
couldn't take two ferrite cores used to avoid the RFI made by the wiring
of computers ?
Obviously, I will try it but I would like to get some advices before...

73 Daniel
Dan -

Much of this information can be found on the FARA web site
http://www.falara.org/tektalk/tektalkfs.html

Updated parts list
http://www.falara.org/tektalk/hfpartslist.html

RF PARTS COMPANY has this specific part, they do export - but may have a
minimum order size.
(800)737-2787

You can also contact FARA directly -- if a club member has this part
available.

w9gb

Transformer for PA
 

"g. beat " @spam protected wrote in message
. ..
"5itu" wrote in message
...
Hello,

I'm building the "FARA"amplifier (QST June 2003).
Unfortunately, I 'm not able to get the T-3/4 cores, so I wonder whether
I couldn't take two ferrite cores used to avoid the RFI made by the
wiring of computers ?
Obviously, I will try it but I would like to get some advices before...

73 Daniel
Dan -

Much of this information can be found on the FARA web site
http://www.falara.org/tektalk/tektalkfs.html

Updated parts list
http://www.falara.org/tektalk/hfpartslist.html

RF PARTS COMPANY has this specific part, they do export - but may have a
minimum order size.
(800)737-2787

Here is the RF Parts web site. They do have a $25 minimum order
http://www.rfparts.com/



You can also contact FARA directly -- if a club member has this part
available.

w9gb

Transformer for PA
 

5itu wrote:
Hello,

I'm building the "FARA"amplifier (QST June 2003).
Unfortunately, I 'm not able to get the T-3/4 cores, so I wonder whether I
couldn't take two ferrite cores used to avoid the RFI made by the wiring of
computers ?
Obviously, I will try it but I would like to get some advices before...

73 Daniel


Usually, the ferrite cores used for RFI rejection are made of the
same stuff as those used in broadband power transformers so it
might work. However those cores are split in two for easy
application. Glue them together first with a good grade of epoxy
keeping the glue layer as thin as possible. The power handling
may not be as good as the real McCoy though.....

Transformer for PA
 

HI,

Thanks a lot for your answers !

73, Daniel