[Lafayette] He-80 / JR-60 crystal calibrator

Mon, 8 Apr 2002 08:48:15 -0700

Maybe you should explain what "added NFB to HE-80 power amp" means.
Pete

On Tue, 09 Apr 2002 00:37:54 +0900 Toshikazu dan Sakakibara
<[email protected]> writes:
> Hello Ken and the list;
> 
>    I'm also trying to fix the calibrator of my HA-225,
>  not knowledgeable enough to comment for it. For audio
>  response, both HE-80 and HA-225 has good treble. In
>  these receivers ALL of the "Nichicon" brand capacitors
>  showed excessive leakage. My HE-80 had no treble
>  response when I acquired; replacing Nichicon capacitors
>  regained treble; well, regained too much. I had to
>  install additional bypass cap to my HE-80 to reduce
>  the treble. As an experiment I also added NFB to HE-80
>  power amp. Total gain dropped, but the frequency
>  response became much favorable for CD player input,
>  although it was unnecessary for a communication receiver.
>  
> dan
>

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