The Fine Things are Always Hand Made
Hi Kent: I am working on a Shield Grid 9 now that is in very good shape. I have dismounted the SGA (shield grid assembly) because of low filament voltage on the three 22s - max I can get is 2 volts with 5 volts on the entry bus. Taking that SGA off and opening it was much more of a chore than necessary because the designer apparently didn't think it would ever be required. The paperwork discusses the short wave ability of the SG-9 and the need to change the coil in the 630 Antenna Coupler copper box (+ the .0008 added capacitor). Only one of the 4 copper housings has 2 bolts mounting it to the bakelite. Do the covers of the other three copper housings pull off? or how do they come off? Is desoldering the lugs from under the chassis to free the assembly required? The bakelite is so fragile that I don't want to apply any damaging pressure. Any ideas/help greatly appreciated!