10-04-2023, 03:27 PM
I'm puzzled over an Aerovox Mica Cap on this set and it's correct value. I attached pictures of the device and the schematic. It is Item #13 across the Oscillator Coil windings, shown on the schematic as a 110pf. The value has remained the same over the range of different Run's.
In the picture, the Part Number appears to be 140-226. Colors across the top, L-R are, White & Green. Colors across the middle, L-R are, Unknown, Black & Red.
On my DVM Capacitance it reads as a 0.00112mf, BUT I don't trust that on old leaky caps. My EICO 950 Capacitance Bridge reads approx. 0.0014mf. Both are reasonably close, however, the schematic states 110pf!! Off by a factor of 10.
So, I think I should keep the original one, since it appears to be OK, or replace it with a new 0.001mf. But 110pf seems to be questionable. The original does not appear to be leaky. And I am not proficient enough to decode the color for the stated capacitance. I couldn't find any references to the Aerovox Part number.
I'm not sure of it's technical purpose, and how critical the value is.
Thoughts on the correct replacement?
In the picture, the Part Number appears to be 140-226. Colors across the top, L-R are, White & Green. Colors across the middle, L-R are, Unknown, Black & Red.
On my DVM Capacitance it reads as a 0.00112mf, BUT I don't trust that on old leaky caps. My EICO 950 Capacitance Bridge reads approx. 0.0014mf. Both are reasonably close, however, the schematic states 110pf!! Off by a factor of 10.
So, I think I should keep the original one, since it appears to be OK, or replace it with a new 0.001mf. But 110pf seems to be questionable. The original does not appear to be leaky. And I am not proficient enough to decode the color for the stated capacitance. I couldn't find any references to the Aerovox Part number.
I'm not sure of it's technical purpose, and how critical the value is.
Thoughts on the correct replacement?
Thanks
John N3MUN
