Yury
Attached is a copy of the input torroid XMFR that Alpha used in their 77SX
to match a 50 ohm input to a 25 ohm cathode. I have would several of these
and found that about 5 less turns that what is described provides better
matching on 15 and 10 meters without hurting the 160 meter performance.
Terry W6RU
----- Original Message -----
From: "Yury VE3XB" <ve3xb@sympatico.ca>
To: <Amps@contesting.com>
Sent: Sunday, May 25, 2003 8:38 AM
Subject: [Amps] 2:1 Transformer
> I want to build a 2:1 transformer for HF frequencies to match 25 ohm
> impedance. I am wondering if anyone can point me to some info on how to
wind
> such transformer - number of turns, where to tap the coil and what
type/size
> of core should I use, say for 100 watts?
>
> Thanks in advance,
>
> Yuri VE3XB
>
>
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