The 200 and 201 chassis were only used in the X cabinets. That's what makes it a 201X the combination of a given chassis and a particular style cabinet. For the most part X,H, and L are consoles. B's are cathedrals and tombstones. CS, LZ,LZX, and RX are chairsets. The list goes on...
Math is not my strong suit but here's a starting point. Perhaps one of the Mike's can help out will this issue.
https://www.electronics-notes.com/articl...filter.php For now you could connect the top of the 100K resistor over the plate of the 75 to get it working.
>For now you could connect the top of the 100K resistor over the plate of the 75 to get it working<
Nice, I was thinking that I could do that very thing to at least be able to test it. Learning a little more everyday from you all.
Also thanks for the info on what the different letters mean.
Ron
Thank you so much for the link, major time saver for me.
So in the calculator, for frequency, would I use the 10 KC it supposed to create ??
and the circuit has caps #69 & #72 as well as the #71 (adjustable). would I measure the total capacitance of all 3 ?
If so, the total capacitance measures out at 370 pf
If I plug in those 2 factors
10 Khz
370 pf
It gives me 684 Millihenries Does this seem right?
I believe 69 & 72 are there to remove any residual IF carrier frequency left after demodulation. I would just use whatever value 71 is to solve for the inductance of 70.
Ron
Life got busy here, but back at this unit. Hoping to get this figured out and be able to move on.
So the compensating cap #71 (as it is adjusted) measures 280 pf
The trap is 10KC
If I plug those 2 values into the calculator Ron links too, it gives almost 1H inductance. I'm no expert at this so wondering if that seems right ??
I found a 1H choke at antique electronics P-T158T but its only 40 ohms. If the calculation is correct would this one work ??
Thanks
Bob
I come up with approx. .9 H. Not being an engineer, I would give it a try with the part you found and see how it goes, it won’t hurt anything! GL.
Ron
< I come up with approx. .9 H. Not being an engineer, I would give it a try with the part you found and see how it goes, it won’t hurt anything! GL. >
Great thank you for chiming in Ron, feel more comfortable with trying it.
Bob