R1155 Loop - UK Vintage Radio Repair and Restoration Discussion Forum

Mike Brett · 18th Feb 2007, 10:38 pm

Hello all
Have just finished building a D/F Loop for the R1155. Can anyone who has done similar tell me what they used to connect the two together, in my case about one meter. I know it has to be twine screened cable so would RG58 be best or would a lighter audio screen cable do the job.
Many thanks Mike.

John H. · 18th Feb 2007, 11:37 pm

Hi Mike,
Have a loop myself - you need to use 2 wire twisted pair screened cable, not coax.
If you don`t have the correct`c` shaped Jones plug with its internal cap, you will require a small air spaced variable capacitor of 75 pf at the plug end across the loop pair to tune for mamimum sensitivity. John.

Mike Brett · 19th Feb 2007, 9:22 pm

Hi John
Many thanks for info, great help.
73s Mike.

18th Feb 2007, 10:38 pm	#1
Mike Brett Retired Dormant Member Join Date: Dec 2005 Location: Wisbech, Cambridgeshire, UK. Posts: 452	R1155 Loop Hello all Have just finished building a D/F Loop for the R1155. Can anyone who has done similar tell me what they used to connect the two together, in my case about one meter. I know it has to be twine screened cable so would RG58 be best or would a lighter audio screen cable do the job. Many thanks Mike.

18th Feb 2007, 11:37 pm	#2
John H. Retired Dormant Member Join Date: Nov 2005 Location: West Sussex, UK. Posts: 51	Re: R1155 Loop Hi Mike, Have a loop myself - you need to use 2 wire twisted pair screened cable, not coax. If you don`t have the correct`c` shaped Jones plug with its internal cap, you will require a small air spaced variable capacitor of 75 pf at the plug end across the loop pair to tune for mamimum sensitivity. John.

19th Feb 2007, 9:22 pm	#3
Mike Brett Retired Dormant Member Join Date: Dec 2005 Location: Wisbech, Cambridgeshire, UK. Posts: 452	Re: R1155 Loop Hi John Many thanks for info, great help. 73s Mike.