Dan/W4NTI wrote:
I am putting up my old TA-33SR by Mosley. I need to know how many windings
are needed on the choke. I seem to remember 6" diameter, but not the
amount of windings.

According to the manual there is no choke indicated at all.

Anyone know anything about this?

Dan/W4NTI

Hi Dan, The choke on a 3 band Yagi is to decrease feedline
radiation, a choke balun. If you don't use a choke balun, you could
have some pattern distortion, it would deviate from the classical 3
element Yagi pattern.
I think the rule of thumb is have enough chocking impedance on the
lowest band (20M) so that it is 10X the antenna impedance (50 ohm).
You wind your coax into a coil that will accomplish this.
The TA-33's that I have seen did not have the choke balun. In casual
Amateur operation of the TA-33 I doubt you would miss the choke, or
know if it was there or not.
Gary N4AST