well that was easy. and you where right Colin. the fix was just a matter of
moving ctk in front of cck rather than following cck. presto super match and
gained almost 200w out. the design is the yu1aw 2m ptfe. i have built
several of these now and they all have had some little somthing tweaky. now
i think i want to get away from the ptfe and use doorknob caps at the end of
the plate line. any thoughts on this guys?
Carey, lc5gtt
----- Original Message -----
From: "k7fm" <k7fm@teleport.com>
To: "Carey Lockhart, KC5GTT" <kc5gtt@gmail.com>
Sent: Tuesday, June 21, 2011 12:10 AM
Subject: Re: [Amps] input tuning
> Hi Carey:
>
> I am not familiar with either the amp or the tube, but it sounds like you
> have some reactance you are tuning out with the screwdriver. If the
> screwdriver adjusted cap is series, then a small parallel cap to ground
> should be able to tune out the reactance. Or, just put a copper tab on
> the solder joint and bend it back and forth to get the correct capacitance
> to ground.
>
> 73, Colin K7FM
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