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Old 30th Dec 2018, 11:53 pm   #84
Neil Purling
Nonode
 
Join Date: Jul 2005
Location: Hull, East Yorkshire, UK.
Posts: 2,083
Default Re: More Chinese AM radio kits

In my radio V1 through 4 are 2N3904.
V5 is a 2SC495G, the one with the highest hfe.
V6 & 7 are a pair of 9013 taken from another kit that had a hfe of 250 & 251 respectively.
Upon switching on it was barely audible, but then I got out my signal generator and gently tweaked the white, yellow & black cores to a peak by ear at 460-465 Khz.
Then I was seeing if I could get a broadcast & I have!
It needs more fiddling I suppose.
I really want to get it into the case & try some speakers to see if there's one that sounds any better than the one supplied with the kit.
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