Hi everyone,
Got my G7 put together but there is no sound whatsoever so I was hoping there might be a couple of pointers towards the problem, as I'm a bit lost....even after searching the meta.....
I'm using Dale's M7, a PF86, Gustav's board and a Sowter 3678 transformer, all inside a lenghtened former Nady 1050. At the moment my readings under load on the pins are:
Pin 2: 168V
Pin 5: 56V
Pin 6: 4.5V
These are ok from what I can tell (from other peoples in the meta). The tube lights up, but only slightly. Had someone help me mod the PSU (ex Nady 1050) with a variable heatervoltage pot on the outside. In the process I did tell him to change the 200mA to 300mA for the PF86, but somehow I can't get a measurement to verify this on pin 6...??
The other thing is the Sowter 3678. Talked with someone at Sowter and he reckoned to wire it up how I have it now:
In:
Yellow from pin 5
blue from pin 6
Out:
pink to pin 4 (200 Ohm out)
brown to pin 3 (common)
Pin numbers here relating to the 1-6 pins for the Lundahl on Gustav's PCB.
I was thinking this would give me the 200 Ohm output......(50 and 600 optional). Don't know how to put the Sowter pin diagram on here unfortunately.
And finally, the voltages before and after the 100K resistor are 157V and 67V.
I hope all this points someone's more informed brain towards a likely simple idiocy commited by yours truly. Any help would be greatly appreciated!
Boris
Got my G7 put together but there is no sound whatsoever so I was hoping there might be a couple of pointers towards the problem, as I'm a bit lost....even after searching the meta.....
I'm using Dale's M7, a PF86, Gustav's board and a Sowter 3678 transformer, all inside a lenghtened former Nady 1050. At the moment my readings under load on the pins are:
Pin 2: 168V
Pin 5: 56V
Pin 6: 4.5V
These are ok from what I can tell (from other peoples in the meta). The tube lights up, but only slightly. Had someone help me mod the PSU (ex Nady 1050) with a variable heatervoltage pot on the outside. In the process I did tell him to change the 200mA to 300mA for the PF86, but somehow I can't get a measurement to verify this on pin 6...??
The other thing is the Sowter 3678. Talked with someone at Sowter and he reckoned to wire it up how I have it now:
In:
Yellow from pin 5
blue from pin 6
Out:
pink to pin 4 (200 Ohm out)
brown to pin 3 (common)
Pin numbers here relating to the 1-6 pins for the Lundahl on Gustav's PCB.
I was thinking this would give me the 200 Ohm output......(50 and 600 optional). Don't know how to put the Sowter pin diagram on here unfortunately.
And finally, the voltages before and after the 100K resistor are 157V and 67V.
I hope all this points someone's more informed brain towards a likely simple idiocy commited by yours truly. Any help would be greatly appreciated!
Boris