I ordered the Allied Radio catalog in 1966. It was full of interesting stuff and I had yet to see a Radio Shack store. By 1969, Radio Shack had acquired Allied Radio. The new Allied-Radio Shack catalogs became an annual treasure. The place became less "nerdy" when Tandy acquired the company. More consumer electronics and fewer parts and kits.
Allied Electronics is still in business, but with different owners, and still based in Fort Worth. In the mid to late eighties, they were just about 4 blocks from my work and they had a walk up counter. Now they’re off east Loop 820 near the Trinity River.