UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Inherited Barlow-Wadley XCR-30 with FM

Argus25 · 31st Jan 2019, 12:02 am

Hi Jim,

The XCR 30 is a great set and well worth fixing up. Many I have come across are out of alignment, and they need to be correct for excellent results.

I wrote a description of how the system works, taking a different approach to what was written before, it helped me understand the radio better. As I noted in the text the "loop" is a bit of a misnomer as it is a feed forward control system. This does not include the FM version though, but it does include a better way to set up the AGC than is in the BW manual:

http://worldphaco.com/uploads/THE_AM...LEY_XCR-30.pdf

(PS: in the circuit diagram of the AGC system there is a resistor missing in the base of TR10 that I have not corrected yet, so ignore that)

31st Jan 2019, 12:02 am	#6
Argus25 No Longer a Member Join Date: Oct 2016 Location: Maroochydore, Queensland, Australia. Posts: 2,679	Re: Inherited Barlow-Wadley XCR-30 with FM Hi Jim, The XCR 30 is a great set and well worth fixing up. Many I have come across are out of alignment, and they need to be correct for excellent results. I wrote a description of how the system works, taking a different approach to what was written before, it helped me understand the radio better. As I noted in the text the "loop" is a bit of a misnomer as it is a feed forward control system. This does not include the FM version though, but it does include a better way to set up the AGC than is in the BW manual: http://worldphaco.com/uploads/THE_AM...LEY_XCR-30.pdf (PS: in the circuit diagram of the AGC system there is a resistor missing in the base of TR10 that I have not corrected yet, so ignore that)