That's on the 12V end of the input board. 50V will be fine. If I remember correctly these boards had limited space for that cap so it was hard to fit a 100V cap there, otherwise I would have used one.
I had in mind i could use lower voltage rating since ithey was at 12V end (same as VSSA) but i am wrong. Even in 50V it's difficult to find 5-13mm model in good brand many are 7.5-16mm....
Marc
Lower voltage should be okay there. I like to put higher voltage caps in place in case of failure of another part like a zener so the caps can't pop from overvoltage but it's likely not necessary. I use 100V everywhere normally.
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I just ran the spice file and those see less that 1V. I used 16V on all of mine and I built 6 of them. No issues.
for some of the newer CAD users that may drop into this thread, this is an example of a benefit of using a tool with well-integrated schematic capture and layout.
us old geezers need this kind of help anyways!
🙂
mlloyd1
us old geezers need this kind of help anyways!
🙂
mlloyd1
I haven't messed about with the simulation, can anyone say definitively that the capacitance multipliers MUST be connected to G2 rather than the G1 star? Just continuing with my alternate layout and will find it really hard to use the G2 point for the multipliers. Thought / opinions welcomed.
Hi Pete,
I've had it playing all morning. Plays great. I wanted to note this in case ut matters. When I have R23/R30 set to 11mA, R15/R16 are at 4.2mA. Would dropping emitters for Q7-10 to 47R help/hurt?
Is it really a competition going on? I think there are two different approaches and one of them is based on making this a commercial endeavor. I have examples from both and they are very different styles completely. One all thru hole and one based on smd. I haven't kept up with the First One and now it seems there are two versions of that with one with one pair of outputs and a second now with a pair.
"Can't we all get along".
"Can't we all get along".
I think you confuse Carlos (destroyer X) and Andrej (Lazy Cat). Carlos has his 'DX Corporation', and imaginary company, and Andrej has moved solidly into closed design commercial endeavours.
That's a little higher than the 1.8ma specified , but 2.1 is not bad ... quite
within the q1-4 optimum. I think dropping the Q7-10 resistors would give
1.8ma= 11ma ratio and increase the total gain a tad. "If it ain't broke , why fix it?" 😀
Dadod , I'm about to get my SHOTGUN (like Carlos) ... that's his "style" !
Edit - there ... Carlos style.
OS
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I ain't sellin' stuff ? LC is , says other stuffs are poop. Douglas self
even just said we all need to be building "blameless's" (signal tranfer PCB's).
So , there does seem to be some dislike going 'round , as every Badger
or Slewmaster is one less board sold in a finite market.
Oh , well .
OS
Pete,
I wasn't saying you are selling anything, I was referring to LC, he is in this for commercial gain. I've seen the posts by D. Self, now he is even trying to tell B. Cordell he doesn't like the way he presents his work in his book. I do find him a bit condescending that is for sure. I haven't looked anywhere else at amplifier design but your threads for a long time now, I love what you are doing.
I wasn't saying you are selling anything, I was referring to LC, he is in this for commercial gain. I've seen the posts by D. Self, now he is even trying to tell B. Cordell he doesn't like the way he presents his work in his book. I do find him a bit condescending that is for sure. I haven't looked anywhere else at amplifier design but your threads for a long time now, I love what you are doing.
Cordell admits the validity of CFA and symmetrical designs in the audio world.
Self is "My way or the highway". Very narrow design scope , great book
if you just want to build a "blameless"
Now he is condemning Cordell for not having an AP , or relying on any simulated
data.
Self's book even discounts the EF3 as unstable , Bob actually personally
helped me make the slewmaster EF3 possible. 😎
OS