UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Chinese 1A2 Super Regenerative FM radio kit

Philips210 · 23rd Dec 2018, 11:59 pm

Hi.

I have finally got around to having a look at the 1A2 kit and must say that I'm confused about the orientation of coils U2 and U3. Initial checks on the tuning capacitor suggest it is somewhat higher in value to the specified 2-10pF.

I've been having a search around on the internet this evening and found a reference to the kit here https://www.youtube.com/watch?v=GwYuaTp7F4o (read the replies) and in that link the chap refers to this link https://www.youtube.com/watch?v=Z5GKsWtMT7w and amazingly, he actually gets this little kit working by making a change to one of the inductors.
Also, looking at his revised circuit diagram in the video, he has made a number of circuit changes.

I note the positioning of the aerial coupling coil and tuning coil. This has given me more confidence to proceed further with the kit over the Christmas break.

Regards
Symon.

23rd Dec 2018, 11:59 pm	#63
Philips210 Nonode Join Date: May 2007 Location: Redruth, Cornwall, UK. Posts: 2,578	Re: Chinese 1A2 Super Regenerative FM radio kit Hi. I have finally got around to having a look at the 1A2 kit and must say that I'm confused about the orientation of coils U2 and U3. Initial checks on the tuning capacitor suggest it is somewhat higher in value to the specified 2-10pF. I've been having a search around on the internet this evening and found a reference to the kit here https://www.youtube.com/watch?v=GwYuaTp7F4o (read the replies) and in that link the chap refers to this link https://www.youtube.com/watch?v=Z5GKsWtMT7w and amazingly, he actually gets this little kit working by making a change to one of the inductors. Also, looking at his revised circuit diagram in the video, he has made a number of circuit changes. I note the positioning of the aerial coupling coil and tuning coil. This has given me more confidence to proceed further with the kit over the Christmas break. Regards Symon. Last edited by Philips210; 24th Dec 2018 at 12:10 am.