20-03-2011, 11:43 PM
The only work I noticed had ever been done to it was replacement of the main smoothing can sometime in the mid 40's
Shame about the speaker.. the op tx attached to the frame is good.. but the speech coil was o/c on test. I was planning to scavenge up another unit and recone what survived. I have some experience with speakers so my plan was to unwrap one turn of the coil from the end where the break is and reconnect.. resistance at the break to the end led me to think it was a pretty standard nominal 8 ohm coil.
I was led to believe it's an Aerial AC Superhet from 1938.. it's identical to the battery version in looks. http://www.classicwireless.btinternet.co.uk/graves.htm
Graves were in from the start.. making crystal and 2 valve sets from the mid 20's until their demise after WW2.. they even had a "utility manufacturer" number. U37 .. The company may have wound up or been sold on the death of the founder in 1945 (18th July) The trail goes cold in 1945.. no evidence whatsoever of post war models.
Looking forward to seeing progress with this one, not a bad salvage from a back street behind a junk shop eh?
Shame about the speaker.. the op tx attached to the frame is good.. but the speech coil was o/c on test. I was planning to scavenge up another unit and recone what survived. I have some experience with speakers so my plan was to unwrap one turn of the coil from the end where the break is and reconnect.. resistance at the break to the end led me to think it was a pretty standard nominal 8 ohm coil.
I was led to believe it's an Aerial AC Superhet from 1938.. it's identical to the battery version in looks. http://www.classicwireless.btinternet.co.uk/graves.htm
Graves were in from the start.. making crystal and 2 valve sets from the mid 20's until their demise after WW2.. they even had a "utility manufacturer" number. U37 .. The company may have wound up or been sold on the death of the founder in 1945 (18th July) The trail goes cold in 1945.. no evidence whatsoever of post war models.
Looking forward to seeing progress with this one, not a bad salvage from a back street behind a junk shop eh?
