|
|
|
#13
03-18-2014, 01:25 AM
|
||||
|
||||
|
The safety glass is tinted. I thought it was just grubby until I removed the glass for cleaning, but if you photograph it against white, the color jumps out. It's sort of a greenish amber.
 After recapping, the TV is working nicely except for a slight horizontal non-linearity and lack of width (see previous test pattern). The air-gap "width" adjuster mentioned earlier adjusts the HV output directly; I can get anything from 8KV to 10KV by turning it in or out, which makes the entire screen image grow or shrink. At 10KV, it's much too small and at 8KV (as low as I can go), it doesn't quite fill the mask horizontally. I have the feeling that it would fill the screen if I could just correct the linearity, but the TV has no horizontal linearity adjuster. Here's the schematic for anyone who's curious. http://antiqueradio.org/art/Hoffman7M112Schematic1.jpg http://antiqueradio.org/art/Hoffman7M112Schematic2.jpg http://antiqueradio.org/art/Hoffman7M112Schematic3.jpg Perhaps there's a solution, but I'm not sure how much I can expect from this set. I wouldn't mind the minor non-linearity if it would just fill the dinged-danged mask. Phil Nelson Phil's Old Radios http://antiqueradio.org/index.html Last edited by Phil Nelson; 03-18-2014 at 01:28 AM. 
|
|
|
Threaded Mode