An old amplitude modulation broadcast monitor by GR in Cambridge, Mass. Best guess is 1958 for date of origin on this unit. It may be that it was once in a rack shelf or other rack-compatible exo-unit – note the fittings on the left and right sides of the face panel. These are well-made vintage historical pieces, and the 1931-B is no exception. Has a 600-ohm audio monitor connection. The unit powers up; no I/O tests were performed. It’s close to complete, but not quite – you’d need a 2050 tube and an OD3 to fill out the tube complement; each of those types is common and available from multiple vendors. It appears mostly original, with perhaps a few parts and modifications performed over the years. The chassis is dinged up a bit around its lower edges. Just return in like condition within 30 days if not satisfied. See other auctions for more radio, broadcast audio, music stuff! The item “Vintage GR 1931-B General Radio tube-type AM mod monitor” is in sale since Tuesday, June 25, 2019. This item is in the category “Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Other Vintage Audio & Video”. The seller is “micrental” and is located in Portland, Oregon. This item can be shipped worldwide.
- Model: 1931B
- Country/Region of Manufacture: United States
- MPN: Does Not Apply
- Brand: General