08-02-2016, 02:58 PM
Thanks for reading the thread and for spotting that Terry.
Given that it's an auto transformer, and hence, doesn't have a secondary, (or does it - just for the 1V4 windidng?) - I find the way they've depicted the tappings on the circuit a bit confusing. The drawing of the transformer is a bit odd to say the least, to my simple mind!
It shows points 1 & 7 on the same tag, but point 1 on the circuit is the 240V AC input, with point 2 the 220V tapping, point 3 the HT into the rectifier, point 4 the 6V3 heater tapping, and point 5 the ground. Hence, if point 7 is commoned with point 1 (240V input), then point 5 must be the other end of a 1V4 winding, which seems a bit odd. I've attached a diagram of the transformer tags, but haven't had chance to run my meter over the windings to see how they check out, but I know that there's 1V4 between tag 6 and the chassis.
Many thanks for your input Terry.
Given that it's an auto transformer, and hence, doesn't have a secondary, (or does it - just for the 1V4 windidng?) - I find the way they've depicted the tappings on the circuit a bit confusing. The drawing of the transformer is a bit odd to say the least, to my simple mind!
It shows points 1 & 7 on the same tag, but point 1 on the circuit is the 240V AC input, with point 2 the 220V tapping, point 3 the HT into the rectifier, point 4 the 6V3 heater tapping, and point 5 the ground. Hence, if point 7 is commoned with point 1 (240V input), then point 5 must be the other end of a 1V4 winding, which seems a bit odd. I've attached a diagram of the transformer tags, but haven't had chance to run my meter over the windings to see how they check out, but I know that there's 1V4 between tag 6 and the chassis.
Many thanks for your input Terry.
Regards, David.
BVWS Member.
G-QRP Club Member 1339.
'I'm in my own little world, but I'm happy, and they know me here'
BVWS Member.
G-QRP Club Member 1339.
'I'm in my own little world, but I'm happy, and they know me here'
