[hpsdr] Transformers from Communication Concepts

[Gerd Loch]

Peter,
 
thanks for the additional information. Up to now I only found references to
Communication Concepts.
You are right that the transformers are cheap and I do not intend to build
the transfomers myself. 
But nevertheless I need complete mechanical data for the layout of pcbs
where they are used as I have not yet samples on my desk to measure.
 
73, Gerd
DJ8AY
 

-----Original Message-----
From: Peter [mailto:Peter at GEHughes.us] 
Sent: Thursday, February 14, 2008 1:35 PM
To: g.loch at nt-electronics.de
Cc: hpsdr at lists.hpsdr.org
Subject: RE: [hpsdr] Transformers from Communication Concepts


Gerd
I think they went into businesss to simply make all of the Motorola APP
notes a reality... and have been doing so since the mid 80's
If you notice their amps are exact duplicates of the ones described in the
App notes...  They are even mentioned as a source of kits in the App notes..
along with references to RF Concepts..Which supplied the original
Transformers
The Original APP Notes were created at Motorola in Phoenix, Az by Helge
Granberg who was also an ARRL Technical Advisor ...RFConcepts is in Peoria,
AZ.. and Communication Concepts, in Beavercreek, Oh, is quite close to
Dayton.. Lots of Hams there.... and in Az...

Just one big happy family...
For the very low cost of the transformers ($US~6.00) are you sure you want
to waste you time trying to build and tune one? I think it would cost more
to simply try and procure all of the parts you need..

Peter
N7BMG



-------- Original Message --------
Subject: RE: [hpsdr] Transformers from Communication Concepts
From: "Gerd Loch" <g.loch at nt-electronics.de>
Date: Thu, February 14, 2008 7:09 am
To: "'Peter'" <Peter at GEHughes.us>
Cc: <hpsdr at lists.hpsdr.org>


Peter,
 
thanks for yor link. That helps of course.
What is then the business of Communication Concepts?
 
73, Gerd
DJ8AY

-----Original Message-----
From: Peter [mailto:Peter at GEHughes.us] 
Sent: Thursday, February 14, 2008 12:45 PM
To: g.loch at nt-electronics.de
Cc: hpsdr at lists.hpsdr.org
Subject: RE: [hpsdr] Transformers from Communication Concepts


Gerd
Try:
http://www.rfpowersystems.com/prod02.htm

This the place which actually makes the Transformers used by Communications
Concepts..
They have dimensions listed for their current line which should help you as
far as just straight mechanical .
Also look at Application note AR347 on Communications Concepts for a write
up on the amp.

Peter Hughes
N7BMG



 

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