[AMPS] Duplicating broad band tuned input
Lane Zeitler
Ku7i@worldnet.att.net
Thu, 17 Feb 2000 22:59:58 -0800
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I would like to copy the design ETO/Alpha used in the mid 70s to mid 80s =
on their tuned input circuits. They used a toroid in combination with a =
small cap and resistor I believe. I have the schematic somewhere here in =
the shack but my main concern is how is the toroid wound?
I have a Sigma XR3000D amp that does not have tuned input on 160, 80, or =
40 meters but does have tuned input for 20-10. I have never seen a =
design like this. Anyway, if anyone knows how Alpha wound the coils I =
would appreciate it if they could spread the good news.=20
Lane
Ku7i
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<DIV><FONT face=3DArial size=3D2>I would like to copy the design =
ETO/Alpha used in=20
the mid 70s to mid 80s on their tuned input circuits. They used a toroid =
in=20
combination with a small cap and resistor I believe. I have the =
schematic=20
somewhere here in the shack but my main concern is how is the toroid=20
wound?</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=3DArial size=3D2>I have a Sigma XR3000D amp that does =
not have tuned=20
input on 160, 80, or 40 meters but does have tuned input for 20-10. I =
have never=20
seen a design like this. Anyway, if anyone knows how Alpha wound the =
coils I=20
would appreciate it if they could spread the good news. </FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=3DArial size=3D2>Lane</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>Ku7i</FONT></DIV></BODY></HTML>
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