[462ron]

Hi, I have a Philco 620 which I think is similar to your 37-610 but uses a 75 as second detector/first AF and as I recall not only is it shielded, but as MrFixr suggests, lead dress to the grid cap was critical. I ran mine inside, between the shield and tube to prevent a howl my set had. As for a long wire antenna, I use the two wires out of the four that my home phone uses. That gave me an antenna around 25’ high off the ground and 65’ long to the telephone pole. Works great!

Ron