UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

sobell1980 · 3rd Dec 2017, 7:10 pm

Just thought I'd drop a few lines before the working week starts again. As Sam recommended I soldered the heater connections/pins on the UU6 valve. I can see what you mean now about how the wires lead out the glass envelope and terminate inside the pins. I soldered all the pins, not just pins 1 and 8 for the heater. I now have continuity across the heater element, about 0.8 ohms. However I still have no operation from the valve when it's plugged in. It doesn't glow or get warm like the others do. I have no HT when checked either. So I think sadly the valve is dead. With the uu6 removed I have 4 volts ac to the heater testing across pins 1 and 8. I have 240 volts a.c. to both anodes. That checking each anode pin to ground as the transformer is centre tapped. Everything is there to make the uu6 work.
I've yet to try and solder the pins on the duff 6P25 but as I have a working replacement I want to continue work on the set and get it working, but I will get around to this.
Dave.

3rd Dec 2017, 7:10 pm	#33
sobell1980 Octode Join Date: May 2011 Location: Bromyard, Herefordshire, UK. Posts: 1,241	Re: Murphy A188C repair. Just thought I'd drop a few lines before the working week starts again. As Sam recommended I soldered the heater connections/pins on the UU6 valve. I can see what you mean now about how the wires lead out the glass envelope and terminate inside the pins. I soldered all the pins, not just pins 1 and 8 for the heater. I now have continuity across the heater element, about 0.8 ohms. However I still have no operation from the valve when it's plugged in. It doesn't glow or get warm like the others do. I have no HT when checked either. So I think sadly the valve is dead. With the uu6 removed I have 4 volts ac to the heater testing across pins 1 and 8. I have 240 volts a.c. to both anodes. That checking each anode pin to ground as the transformer is centre tapped. Everything is there to make the uu6 work. I've yet to try and solder the pins on the duff 6P25 but as I have a working replacement I want to continue work on the set and get it working, but I will get around to this. Dave.