I looked at the various 3-400 and 3-500 circuits in the Eimac Amateur
Service Newsletters and did not find this mentioned anywhere.
If the SB-220 and L4 use the same grid circuit, I could ask the engineer who
designed the Drake L-4 as I know him personally. Any interest?
73 Jack N8DX
On Thu, Jul 30, 2009 at 6:48 PM, Ward Silver <hwardsil@gmail.com> wrote:
> > perhaps somebody with an SB-220 and a spectrum analyzer needs to do
> > an IMD profile using each grid circuit and SEE which one produces the
> > cleaner
> > output.
>
> What?! And ruin a perfectly good thread?
>
> 73, Ward N0AX
>
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