The chassi I used to build my AA764 champ has the standby switch hole there so i used

[catnine]

It then champs don't have standbys and never needed them so I wired it in but just keep it on play. I have read the if you use a standby switch then the rect is heating up to full on and since I have the standby between the pin 8 of the 5y3 and the B+ then in using the standby rather than the slow startup of the 5Y3 am I really creating more of a spike or voltage surge charging a drained res cap??

Also , I was looking at the 5Y3 spec sheets and it is rated a 50volt@125mA voltage drop at current so it stands to reason if my champ is only drawing say 40 mA working then the 5Y3 is not going to drop the voltage all that much . Is that a fair statement?

The last thing is when calculating the amps total working mA draw is this just the current draw off the rect tube and not the heaters since the heaters are a/c and on a different PT secondary tap . I know if you were building an amp then you would need to know what amp rating was needed for the heaters and also the 5 volt .

[diagrammatiks]

it really makes no difference at all whether you use a stand by or not. In terms of surge...at some point during the normal operation of the amp...the cap is going to be charged from empty to full. That really shouldn't stress your rectifier or your power transformer at all. In fact, it's going to happen a lot, pretty much all the time.

either the power transformer has enough current or it doesn't.

the current of the heater windings should be independent of the ht current rating, ideally. In a real transformer there will be losses depending on how each winding is loaded...

but the heater winding is going to be measured in amperes and the ht is measured in mA....in 99 percent of circumstances one isn't going to effect the other.

You really shouldn't be depending on your rectifier to set your b+ voltage. If you have a target voltage then do the calculations and make sure that's the voltage you get. It doesn't matter if it's a tube rectifier or solid state rectifiers or whatever.

[catnine]

it really makes no difference at all whether you use a stand by or not. In terms of surge...at some point during the normal operation of the amp...the cap is going to be charged from empty to full. That really shouldn't stress your rectifier or your power transformer at all. In fact, it's going to happen a lot, pretty much all the time.

either the power transformer has enough current or it doesn't.

the current of the heater windings should be independent of the ht current rating, ideally. In a real transformer there will be losses depending on how each winding is loaded...

but the heater winding is going to be measured in amperes and the ht is measured in mA....in 99 percent of circumstances one isn't going to effect the other.

You really shouldn't be depending on your rectifier to set your b+ voltage. If you have a target voltage then do the calculations and make sure that's the voltage you get. It doesn't matter if it's a tube rectifier or solid state rectifiers or whatever.

I am not depending on the rect tube to set the B+, there are resisters and based on componant current draws like the draw of the plate and it's bias that set the B+ at the required point. The bulld is not a new design it is based off of a proven build using all the componants and values off that schematic.