12-24-2011, 03:47 PM
All the 37-610 and 37-611 sets I owned would take metal or GT tubes. They have pin 1 grounded. The problem comes with the 1938 models which use a different mount for the square tube shields. They have a small opening and won't take anything larger than a G style tube base.
I remember getting a console 38-5 when I was in junior high (1966). It was missing a 6K5G 1st audio tube. I was able to find a 6K5GT but the base was larger in diameter. I had to mangle the shield mount riveted to the chassis to accept the 6K5GT replacement. This was before my AWA and ebay days when you had to hope the local radio/tv shop had some old tubes in the back of the store.
Fred
I remember getting a console 38-5 when I was in junior high (1966). It was missing a 6K5G 1st audio tube. I was able to find a 6K5GT but the base was larger in diameter. I had to mangle the shield mount riveted to the chassis to accept the 6K5GT replacement. This was before my AWA and ebay days when you had to hope the local radio/tv shop had some old tubes in the back of the store.
Fred
