As a matter of fact, you are right, ofcourse😉 As I said, I consider a pair of single driver speakers for this amp!
Steen😎
I wasnt looking for the caps😀 😀 😀 Only the footprint for them in Eagle😀 😀 My passport is valid all over this globe I guess!! I deal with people from Japan, Taiwan, Canada, China, Italy....... Even the States😀 😀 😀 This is a very nice hobby indeed, you get connected to people all over the planet😉 I love that😎
Apassgear, I like that schematic! Nice work😉
9240 CCS and regulated supply!!! Just my kind of thing🙂 Easy enough to modify my old ZenV1 (Somewhat modded allready)
I would like the Zener protection though! You never know when some dumb*ss comes along and fiddle with your setup😀 😀
Steen😎
steenoe said:
Mostly damage is done by the resident dumb*ss😀
.....but that aside I agree that the zener protection is a good idea with no drawbacks.
Magura 🙂
Yep, the Girlie thingie.... Women and technic, I mean Come on😀 😀 You are doomed😉
Steen😎
Now if they could just learn the start sequense........
steenoe said:
Now if they could just learn the start sequense........
Monkey see, monkey doo.....it's been known to work quite well on other spieces 😉
Magura 🙂
Apassgear Schematic
Looking at your schematic, I think there should be a 50k resistor to ground in front of the C6. In the original Zen schematic (TAA 2/94) this resistor was designated R9 (47k5). Also, if you look at the F2 manual's specs you'll see that the amp has a 50k input impedance.
Regards
Ejam
Looking at your schematic, I think there should be a 50k resistor to ground in front of the C6. In the original Zen schematic (TAA 2/94) this resistor was designated R9 (47k5). Also, if you look at the F2 manual's specs you'll see that the amp has a 50k input impedance.
Regards
Ejam
I did give a lot of consideration to R9!
But as NP say's, the input impedance for this is, quoting Mr Pass himself!!
Read post #82 or there about!!
I figured R9 in the original circuit woudn't help?
Steen😎
The setting of the 200k pot will probably be just above 50k (thus setting the input 50k impedance) for a voltage on the Q1 Drain at around 12V. >50k will just about set the voltage gain at 16db or so.
I think you need to add one more 7.5 v zener to the string, you only have 30 volts with 4 of these, less 4 volts that the pass mosfet is going to drop. As the schematic stands you will have about 26 Volts, not the expected 33 as shown in the schematic. Other than that looks good 
-D
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steenoe said:
Nice girls and party, I'm sure they loved you system. What could make a father more proud 🙂
steenoe said:
To my thinking R9 of the original article only works as a termination for the source and could be needed if you use a low impedance one, and maybe an even lower value. It wont have any influence on the amp itself
A protection zener could be used, the original Zen did have one, but subsecuent iterations did not. So to keep the Zen spirit did not add one.
I will add the zener protection, as an option, on a subsecuent revision of the circuit.
I will add the zener protection, as an option, on a subsecuent revision of the circuit.
Here's more or less apassgear's F2 circuit with some ckt sims....+/-9Vmax, 2.8A bias, 5Wrms into 8ohms...just replace transistors with your favorite fets.
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