02-25-2021, 07:45 PM
The bandswitch is back together and connected. Started to do the oscillator alignment and it's back to it's old tricks again.
Bcb went ok.
Band 2 alignment is a little quirky. Set the osc # 1570kc @ the low end and 3.6mc at the high end. Struck me a little funny that there is no hash mark for 1570 must have been an after thought. I did that and just for grins I check to see where it was receiving at 4 mc (the top of the dial) 3.8 mc. Hmmm Doesn't track so well. Made the executive decision to set the osc at 4460kc and now it tracks across the whole range of the dial.
Band 3 Set trimmer at 5.2 mc. Doesn't do much at all. Need to investigate to see what's going on.
Bands 4/5 Aligns fine at the top end but the low end is way off. This is a little different from the problem I was having with the other 16b it was dying out. This stays running but about a mc too high. Bands 3,4,and 5 are all related maybe that trimmer on band 3 will straighten things out. [Image: https://philcoradio.com/phorum/images/sm...on_lol.gif] Fat chance [Image: https://philcoradio.com/phorum/images/sm...wisted.gif] Must be the curse of the 16B...
Bcb went ok.
Band 2 alignment is a little quirky. Set the osc # 1570kc @ the low end and 3.6mc at the high end. Struck me a little funny that there is no hash mark for 1570 must have been an after thought. I did that and just for grins I check to see where it was receiving at 4 mc (the top of the dial) 3.8 mc. Hmmm Doesn't track so well. Made the executive decision to set the osc at 4460kc and now it tracks across the whole range of the dial.
Band 3 Set trimmer at 5.2 mc. Doesn't do much at all. Need to investigate to see what's going on.
Bands 4/5 Aligns fine at the top end but the low end is way off. This is a little different from the problem I was having with the other 16b it was dying out. This stays running but about a mc too high. Bands 3,4,and 5 are all related maybe that trimmer on band 3 will straighten things out. [Image: https://philcoradio.com/phorum/images/sm...on_lol.gif] Fat chance [Image: https://philcoradio.com/phorum/images/sm...wisted.gif] Must be the curse of the 16B...
When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got!
Terry
