Re: knq7a bias current

Adam Rong
 

Ron,

Have you observed very hot parts during transmission? Besides the trimmer position, please check if you have properly installed the insulators for BD139/D882 and IRF510.

Thanks,
Adam

于 2017-10-21 23:28, rhering6938@... [CHINA_QRP] 写道:

 

Hi All,
Finally getting around to finishing my knq7, but ran into a problem.
 The idle current is around 40 ma but when PTT is keyed it jumps up to around 1400ma at the low end. Any ideas on where to start looking? All help will be greatly appreciated. Thanks, Ron.



Join crkits@groups.io to automatically receive all group messages.