Conrac TV Tuner missing CH4 'strips' from the Mid 50s

[cbenham]

I have a Conrac Model 650 TV Tuner that uses a Standard Coil tuner. It is working pretty well but is missing the original two tan turret strips for Channel 4.

The attached photo shows two strips in the CH 4 position labeled "4F".

These are strips borrowed from an Admiral 17 inch set. I also tried the two strips from an Admiral 19T 7 inch electrostatic set which are labeled "4".

While these two sets of borrowed strips work, sort of, they are much different than the "3Q" and other "#Q" strips that are original to the tuner.

The Q type strips seem to have much broader bandwidth and output a much more proportionally correct NTSC color signal to display on a scope.

The two sets of borrowed CH4 strips seem to have a much narrower bandpass and produce about 50% more sync, as if they were
specifically designed for early B&W sets used in remote areas.

Does anyone have a "KEY" to the various specific types of strips by Standard
Coil such as the Q, plain and F types?

Does anyone have a standard coil tuner with Q series VHF strips, or maybe just the two "4Q" strips they would like to sell?

Thanks for any help with this.

Cliff