[Premium-Rx] Odd behavior by NRD-515

[Howard Ritter]

Thank you, Charles. You nailed the problem, and its solution, exactly. The independent review you linked to is new to me, and very helpful. The receiver has normal sensitivity in the BC band when the BFO & BC TUNE control is peaked…as stated in the instruction manual. Not only had I not RTFM but I had not even RTF control label!

Many thanks, 

—howard n7exn


> On Jul 16, 2015, at 6:43 PM, Charles Steinmetz <csteinmetz at yandex.com> wrote:
> 
> Howard wrote:
> 
>> Sure enough, I found just what he did. In tuning through the single step from 599.9 kHz to 600.0 kHz, the background hiss goes from normal to virtually absent, a very striking change.
>> 
>> The band of decreased sensitivity corresponds so closely to the MW broadcast band that I wonder whether this is a coincidence.
> 
> The BCB performance of the 515 has been roundly criticized by pretty much everyone.  You need to peak the BFO/BC control as you tune the BCB.  Even peaked, there is a 15-18dB signal loss.  See p. 11:
> 
> <www.radiomanual.info/schemi/RX/JRC_NRD-515_review.pdf>
> 
> Best regards,
> 
> Charles
> 
> 
> 
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