| :What does "sia" mean? : :Here is the schematic: http://www.transoceanic.nostalgiaair.org/h-500.htm I don't see the box or polygon. Can you help us locate them? : :Does the set work properly on the shortwave bands? If so, and from what you describe, everything would point to the BC switch. contacts. :Doug : ::Hi guys I need some help on this problem. ::First I'm not that knowledgeable and pretty frustrated. ::the problem is that when I press the bcb switch part way in there is reception and when it's all the way in the signal strength drops significantly especially from 800 to 550kc.note I am using a 1r5 in place of 1l6. ::Also the sets been recapped and I gave the switch assy a good clean and sprayed with deoxit. ::I was looking at the schematic fig 16 of the military manual which shows the bcb circuit but don't know what the box symbol is as opposed to that other polygonal one. ::I don't have a 1l6 so I'm not sure if this is due to the 1r5, if it is this issue may be mute. ::Any advice? :: :: ::many thanks JIM |
| zenith t.o. h-500 bcb sia switch | |
 jim | |
  Doug Criner | |
 Walt | |
| Lewis L | |
| jim | |
| jim | |
| Doug Criner | |
| Joe | |
| JIM | |
| SteveB | |
| Bill G. | |
| Radiodoc | |
| Joe |
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