- May 22, 2010
- Reaction score
- SoCal U.S.A.
I hope the uptight remark was not for me.
I am watching.
It is not only about trusting what you read. It is about applying but understanding first.It is nothing Bro. You're always helping me along as well as many others here man. It is very appreciated.
I know I can sound like a broken record sometimes, and lose some patience when it comes to studying up on this stuff before diving in. Yeah, I should not trust everything I see and read on the innerwebz.
I got frustrated with the filter calculators and just dived in by trial and error.
I still need to get that big cap outta there but no heff to do it right now. It is crammed tight in this mess I built. Maybe get back on it later if I feel up to it or maybe tomorrow after the football conf championship games . . . .
It is not only about trusting what you read. It is about applying but understanding first.
I am not positive I fully understand what you actually did but am suspicious you loaded the circuit down by the way it was set up.
There is much to learn about power supplies and supported components when designing circuits, especially lower impedance circuits.
Man I forgot about that. I have to go get it since it is on an account I do not use too often.Did you get the drawing I sent you?
Would you even expect to be able to obtain and hold 6VDC from the 5VAC 3A tap on a power transformer running even one 12AX7 filament?
I am looking at the stuff and see two issues.Mickey, give a forum class on that BR filter cap calculator and the fields/values that need entered. The time field was where I was confused. Is that the time constant charge time?
I am looking at the stuff and see two issues.
But first tell me
1) where is this BR filter capacitor calculator? Link it please.
2) which Omron 5V relay? Part #?
Yes, right. Most available 6.2V regulators will need more like 8.2V to hold proper voltage.Hmmm. I do not see a regulator working in there for the 6V, as they do need that aprox 2V extra on the dropout. I remember seeing/reading about non dropout regulators, but I do not have any.
And I never seen anything close to 7V, which would be due to the voltage drop from the silicone diodes, correct?
RickyLee, now you have me really curious as to what all ya got in this thing? You said seven 12ax7's...??? So, I'll assume six by subtracting the needed phase inverter. Watcha doing with 12 stages? Give a little rundown...reverb or trem circuits? buffered FX loop? Or, multiple separate preamp channels? (maybe you could switch in cascaded circuits?) Got me curious...
As long as the disconnected/tapped leg is the high/positive side it will be ok. That takes the one inside of the amplifier out of play by your description.I want to do a test circuit of this 5V tap to rectified DC, but outside of the amp. I am going to unsolder only one leg of my 5V winding, leaving the other leg hooked up inside the amp to its bridge rectifier/cap/relay coil. I will then use test leads to plug into that 5V tap and make a new rectified DC circuit outside the amp to experiment. You guys see an issue with that one leg of that 5V tap being attached to the original bridge rectifier? Or will it still load/pull down even with one leg hooked up?