There is one on e-Bay with a channel 4 plug-in.
They were quite popular back in the days of early
TV. 

Item number 313881654674. 

73, Dick, W1KSZ 

On Sun, Dec 10, 2023, 10:24 AM <mstangelo@comcast.net> wrote:
Jeff,

Can you provide pictures or spec sheet? I have a box of old coils.

Mike N2MS

> On 12/09/2023 4:38 PM EST n2lxm@juno.com wrote:
>

> Good Afternoon All,
>
>         I am posting my yearly Christmas wish list. I am looking for two
> coil sets for the Millen Antenna Matching Preamplifier. This would be
> Millen part number 46906(6M) and 46915(15M). If anyone has one or both
> they would like to part with. Please contact me. Thanks
>
>
>                                                     Jeff N2LXM
>                                           Amateur Radio Operator
>                                                       American
>                                                         Patriot
>                                      Proud Father of Two US Marines
>
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