[Amps] Cathode input circuit

[Carl]

That circuit goes back to the early days of SSB linears and is in QST, HB, 
and possibly the early edition SSB Manuals

Carl
KM1H



----- Original Message ----- 
From: "Mike Lord" <k4elv at bellsouth.net>
To: <amps at contesting.com>
Sent: Monday, November 01, 2010 10:28 AM
Subject: [Amps] Cathode input circuit


>A question for the group.  Some time back, ZL1AXB published a circuit for a 
>single 813 grounded grid, using a tuned coil input circuit.  He referred to 
>it as a "bifilar wound coil."   I built the amp and it works like a champ. 
>The only other reference to this tuned input I could find was in Orr's 18th 
>edition where he used it on a 6 meter amp. (pp 747 -749).  I couldn't find 
>any further discussion by Orr.  Pat's circuit covered 40 - 10 meters.  I 
>would like to use this circuit on 80 and 160.  Is there a formula for 
>winding the coil?  As anyone else had experience with this tuned input? 
>Thanks.  Mike K4ELV
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