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Old 19th Mar 2017, 9:56 am   #25
Skywave
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Join Date: Jun 2006
Location: Chard, South Somerset, UK.
Posts: 7,457
Question Re: Permeability Tuning

Quote:
Originally Posted by Radio Wrangler View Post
The classic short-wave sets like the AR88, HRO and CR100 were well-made and designed to do about the best feasible at the time but they barely got 3 dB attenuation of their image frequency at the top of their tuning range.
"3 dB" attenuation of the image? Over the years, I've owned and restored all of those sets (and many others similarly with two tunable R.F. stages) and upon measurement have found the image rejection at 28 - 30 MHz to be a lot better than -3 dB. So was that a typo?

Al.
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