15-02-2013, 04:59 PM
(This post was last modified: 15-02-2013, 04:59 PM by Radio Fixer.)
I have added to this one not to score points but I have an illustration that maybe useful.
I have now powered the French Integra up. This is just a 5 valve supie from 1935 but it does use a directly heated rectifier and and indirectly heated valves for the other 4.
On switch on, from cold, the reservoir cap gets to 502V for a few seconds and then goes downwards settling at 390V. The smoothing cap, as there is an HT potentiometer, only sees a max of 483V and when the set is warmed up is 321V.
This is from a transformer of 375 - 0 -375 V.
Gary
I have now powered the French Integra up. This is just a 5 valve supie from 1935 but it does use a directly heated rectifier and and indirectly heated valves for the other 4.
On switch on, from cold, the reservoir cap gets to 502V for a few seconds and then goes downwards settling at 390V. The smoothing cap, as there is an HT potentiometer, only sees a max of 483V and when the set is warmed up is 321V.
This is from a transformer of 375 - 0 -375 V.
Gary
