Quote:
Originally Posted by Neil Purling
Does the ECH81 give more output for the same level of RF input. Just wondering what makes it such an improvement on the ECH35, or 6K8.
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It has a lower Equivalent Noise Resistance [from memory the 6K8 is around 290K whereas the ECH81 is about 60K]
Meaning that the importance of having a RF-amplifier ahead of the mixer (particularly for shortwave use) to overcome internally generated mixer-noise is reduced - though for shortwave use you'll probably still want that RF amp to reduce the image-response.