I agree with zen mod - 24V rails. 1 PCB per channel.
Build as in this guide, but use 18+18VAC 300-400VA transformer.
http://www.diyaudio.com/forums/pass-labs/258301-ba-3-amplifier-illustrated-build-guide.html
Build as in this guide, but use 18+18VAC 300-400VA transformer.
http://www.diyaudio.com/forums/pass-labs/258301-ba-3-amplifier-illustrated-build-guide.html
It's my favorite FirstWatt...
Wow that was a long review
Nah.... Fugly amp!!
Yes, your amps and preamps are especially fUgly
Why 24V vs 32V rails? Isn't more rail voltage just "better" except for the risk to the Jfets? (Slightly) more power and less distortion, right?
On my F5 I am considering going from a single 18+18 transformer to dual mono 32V rails (. I am not concerned about too much voltage on the Jfets, it's a risk I will take. What's the downside?
On my F5 I am considering going from a single 18+18 transformer to dual mono 32V rails (. I am not concerned about too much voltage on the Jfets, it's a risk I will take. What's the downside?
+/-24V , 3 deep or more
I agree with zen mod - 24V rails. 1 PCB per channel.
Build as in this guide, but use 18+18VAC 300-400VA transformer.
http://www.diyaudio.com/forums/pass-labs/258301-ba-3-amplifier-illustrated-build-guide.html
Thanks guys for pointing me in the right direction.
what do you think of these transformers? I will run them at 115, not 230, so half the VA.
Perhaps one per BA3 monoblock to drive an Altec Horn above 700 Hz? The horn is used in a home system, not in a club.
How much power would this 185VA produce? ( It would become something like a 37VCT, 2.5 amps/polarity ). Anything north of 20 watts would be amazing.
Perhaps one per BA3 monoblock to drive an Altec Horn above 700 Hz? The horn is used in a home system, not in a club.
How much power would this 185VA produce? ( It would become something like a 37VCT, 2.5 amps/polarity ). Anything north of 20 watts would be amazing.
These may actually be of some interest to our European friends:
http://shop.plitron.com/specs/480103.pdf
The load I intend to push is 8 ohms. Good! So I can make some sissy amps!
http://shop.plitron.com/specs/480103.pdf
The load I intend to push is 8 ohms. Good! So I can make some sissy amps!
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Hi guys, I got a question here. I was reading the F4 doc & saw that 2 F4 can be driven as parallel mono for 2 ohms load.
Can one config. the BA-3 likewise?
Assuming if it can, will 2 BA-3 (with 3 pairs output per channel) driven as parallel mono have any advantage vs one BA-3 with identical dual-mono power supply & 6 output pairs, in terms of distortion level, current output, etc?
I understand that when driven as mono parallel, both left/right channel must be well matched & balanced for optimal performance. Perhaps this is one advantage that a 6 pair channel has over it?
Can one config. the BA-3 likewise?
Assuming if it can, will 2 BA-3 (with 3 pairs output per channel) driven as parallel mono have any advantage vs one BA-3 with identical dual-mono power supply & 6 output pairs, in terms of distortion level, current output, etc?
I understand that when driven as mono parallel, both left/right channel must be well matched & balanced for optimal performance. Perhaps this is one advantage that a 6 pair channel has over it?
I think Buzzforb did, but he was just buying Jfets from Spencer. Fetaudio.com
Thanks, I just bought some from Spencer.
Why 24V vs 32V rails? Isn't more rail voltage just "better" except for the risk to the Jfets? (Slightly) more power and less distortion, right?
more Bias = less Distortion
more Voltage = more Power
Hi guys, I got a question here. I was reading the F4 doc & saw that 2 F4 can be driven as parallel mono for 2 ohms load.
Can one config. the BA-3 likewise?
Yes, if you double up the front-end and drive the outputs bridge balanced.
If you want more current into lower ohm speakers, just add more output devices.
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