Quote:
Originally Posted by old_tv_nut
I don't have the SAMS. Is that where the 8.2 mHy is stated?
Anyway, I assumed 2 Mhz and calculated 9.3 mHy. Using that and using the tube characteristics to calculate the cathode impedances, I calulate that the 39 ohm and the cathode resistances result in an equivalent resistance of 128 ohms in parallel with the sharpness control 100 ohms (total 56 ohms), resulting in a net damping factor of 1.04 (assuming a 9.3 mHY coil). For a 8.2 mHy coil, the damping factor is 0.98, so still essentially 1.0
For either inductance, the peak current gain at the resonant frequency is 0.4426 at resonance, compared to 0.1822 at DC, for a gain increase of 2.43 times or 7.7 dB at resonance compared to DC.
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Yes, I looked up the replacement specs in the sams, and it said that L15 was 8.2, (rf choke) along with a list of subs.