Re: Need 2 Tube Shields for SX-17
Hi Richard, ? The metal envelope tubes in 1935, (by RCA) right. The ¡°G¡± (glass) variants came during WWII because they were less expensive to produce than the full metal shell ones. The GT variants came at the end of the war and in the following ¡®50s. ? 73, Jacques, VE2JFE in Montreal
|