Bellset no1 malfunction - UK Vintage Radio Repair and Restoration Discussion Forum

trevwgb · 18th May 2008, 12:23 am

Hi all
I have a Bellset no 1 which has suddenly malfunctioned without any reason. There is nothing obvious wrong to inspection and I have checked the leads and internal wires seem intact etc, Thus I wondered if the induction coil might have developed a fault - do they do this? If so how could I test to see if this is the case?
Thanks
Regards
Trev

russell_w_b · 18th May 2008, 1:21 pm

What is the nature of the malfunction?

trevwgb · 18th May 2008, 4:46 pm

Hi
Thanks Russell - on plugging the bellset in, there is a faint noise in the receiver, but no dial tone. It's not the phone ( a 150 ), as I have tested this on another bellset and it works normally. Its not the socket as this works with other phones. I have changes the lead between the bellset and the phone - same problem. I confess I have not yet changed the lead between the bellset and the socket, but this is new.
Regards
Trev

Dave Moll · 18th May 2008, 5:16 pm

Have you checked the induction coil windings with a resistance meter. If you have the circuit diagram which should be pasted inside the lid, this should give the resistance readings for the coil windings.

Also, if you connect the meter (again on resistance setting) across the capacitor, it should briefly show a reading as the capacitor charges then settle down to infinity at DC.

Davey9923 · 14th Jul 2008, 11:45 pm

Hi dont know if this is of any use to you but i just wired up an old 706 to a new plug, everything worked well but the phone would not ring. After many hours work I fond another new plug and on testing that I found the colors were reversed, ie white and red, blue and green. It now works and rings perfectly.
Dave

18th May 2008, 12:23 am	#1
trevwgb Tetrode Join Date: Feb 2007 Location: Haywards Heath, West Sussex, UK. Posts: 81	Bellset no1 malfunction Hi all I have a Bellset no 1 which has suddenly malfunctioned without any reason. There is nothing obvious wrong to inspection and I have checked the leads and internal wires seem intact etc, Thus I wondered if the induction coil might have developed a fault - do they do this? If so how could I test to see if this is the case? Thanks Regards Trev

18th May 2008, 1:21 pm	#2
russell_w_b Dekatron Join Date: Jul 2007 Location: Penrith, Cumbria, UK. Posts: 3,687	Re: Bellset no1 malfunction What is the nature of the malfunction? __________________ Regds, Russell W. B. G4YLI.

18th May 2008, 4:46 pm	#3
trevwgb Tetrode Join Date: Feb 2007 Location: Haywards Heath, West Sussex, UK. Posts: 81	Re: Bellset no1 malfunction Hi Thanks Russell - on plugging the bellset in, there is a faint noise in the receiver, but no dial tone. It's not the phone ( a 150 ), as I have tested this on another bellset and it works normally. Its not the socket as this works with other phones. I have changes the lead between the bellset and the phone - same problem. I confess I have not yet changed the lead between the bellset and the socket, but this is new. Regards Trev

18th May 2008, 5:16 pm	#4
Dave Moll Dekatron Join Date: Feb 2005 Location: West Cumbria (CA13), UK Posts: 6,127	Re: Bellset no1 malfunction Have you checked the induction coil windings with a resistance meter. If you have the circuit diagram which should be pasted inside the lid, this should give the resistance readings for the coil windings. Also, if you connect the meter (again on resistance setting) across the capacitor, it should briefly show a reading as the capacitor charges then settle down to infinity at DC. __________________ Mending is better than Ending (cf Brave New World by Aldous Huxley)

14th Jul 2008, 11:45 pm	#5
Davey9923 Retired Dormant Member Join Date: Jun 2008 Location: Preston Posts: 12	Re: Bellset no1 malfunction Hi dont know if this is of any use to you but i just wired up an old 706 to a new plug, everything worked well but the phone would not ring. After many hours work I fond another new plug and on testing that I found the colors were reversed, ie white and red, blue and green. It now works and rings perfectly. Dave