Well, first of all let me introduce myself as this is my first post here... so hello! I was formerly an electrical engineer now turned audio tech... with projects coming in, and out of my ears! 
I of course have done much reading from the forums as I've went and only now have come across something (odd amp) I thought I should share and possibly even get other opinions on.
The amp itself is a single tube amplifer (or so I thought!) powered off a mains transformer, with a selenium diode rectifier and two filtering capacitor cans containing a total of four 20uF capacitors between them.
Now the circuit itself has HT, however, when I came to fault find... I found that there was HT on pin 4 of the D9 socket... which traditionally should only be around 6-7volts. Further, the 6-7volts required for the heater is instead patched onto pins 5 and 6 direct from the transformer.
Now upon finding this my mind drew up two conclusions, either the tube amp required in question is of a rare variety i'm not yet aware of or the circuit has been wired up wrongly, or even still... is not an audio amp but instead from another application altogether!
One more thing I should add is that there is a resistor closing the center socket O-ring and pin 3 of the socket.
If anyone has any ideas what I may be looking at... I would appreciate your thoughts.
Thanks in advance, and regards.
I of course have done much reading from the forums as I've went and only now have come across something (odd amp) I thought I should share and possibly even get other opinions on.
The amp itself is a single tube amplifer (or so I thought!) powered off a mains transformer, with a selenium diode rectifier and two filtering capacitor cans containing a total of four 20uF capacitors between them.
Now the circuit itself has HT, however, when I came to fault find... I found that there was HT on pin 4 of the D9 socket... which traditionally should only be around 6-7volts. Further, the 6-7volts required for the heater is instead patched onto pins 5 and 6 direct from the transformer.
Now upon finding this my mind drew up two conclusions, either the tube amp required in question is of a rare variety i'm not yet aware of or the circuit has been wired up wrongly, or even still... is not an audio amp but instead from another application altogether!
One more thing I should add is that there is a resistor closing the center socket O-ring and pin 3 of the socket.
If anyone has any ideas what I may be looking at... I would appreciate your thoughts.
Thanks in advance, and regards.