still on going construction Terry, but my first build a 2.2 version was very nice...
i am installing a VI limiter in this build as i am not confident running amps
without any form of SOA protection...this is a 2.4 version btw....
i am installing a VI limiter in this build as i am not confident running amps
without any form of SOA protection...this is a 2.4 version btw....
About picture in post 1700 ..
When I build a module as shown I always fit transistors to heatsink first, the I bend leads to fit printed circuit board holes and care to make shure that the stress is minimum when I put the printed circuit in place.
After that I solder leads and this way mechanical stress on solder joint is minimum.
Build this way I expect to have a unit that will last and I expect that solder joint will never crack..
When I build a module as shown I always fit transistors to heatsink first, the I bend leads to fit printed circuit board holes and care to make shure that the stress is minimum when I put the printed circuit in place.
After that I solder leads and this way mechanical stress on solder joint is minimum.
Build this way I expect to have a unit that will last and I expect that solder joint will never crack..
Can someone please point me towards the latest schematic for this amp? I've scoured this thread and have only been able to find the v2.2 schematic. Other people have asked this same question and have been told to refer to the first post, however that only shows v2.2. The store has a picture of the schematic but it is too small to read.
I followed the post1 link and it took me to the zip in post188.
That does not show the rev on the sch. But the PCB layout shows rev 2.1
That does not show the rev on the sch. But the PCB layout shows rev 2.1
v2.4 board is the latest revision, in this revision provision for the baker diode, and the cascode options clearly marked...
not much change in the scheme that i am aware of...
An externally hosted image should be here but it was not working when we last tested it.
Thanks, but its just that I am considering making my own boards and I would like to incorporate the changes associated with the versions past 2.2 (which is the latest schematic I can find.)
try this one....click to enlarge picture and see the changes i mentioned...
The diyAB "Honey Badger" Class AB Power Amp - 150W/Channel (2 Channels) Rev 2.4 - Power Amplifiers - Circuit Boards
The diyAB "Honey Badger" Class AB Power Amp - 150W/Channel (2 Channels) Rev 2.4 - Power Amplifiers - Circuit Boards
For C7 & C8 I would not change silver mica for any other kind ( exept vacuum capacitor ) they have the best quality factor it means that they dont convert electric power into heat at any frequency ( no heat at all )
note: there is no vacuum capacitor suitable for this application .
note: there is no vacuum capacitor suitable for this application .
newbie questions, I'm about to start building this amp in a rather size limited case and I am trying to size the components just so. Driving only a couple of cjd's mtm speakers 4R at a very modest volume.
One adjusts how much power the amp has with the rail voltage How low can I go. what does the bias really do? I'am asking because if I go with a 800va transformer of 50v+- I only got about 2cm from badger pcb to transformer.
Is the slowstart from the audiostore ok as softstart module, do I really need dc protection and does the dc protection really affect audio quality?
The thing that has really kept me back was this:
I've previously build jlh designs class a amps and gotten a bad noise from running it as a stereo amp, once in monoblocks it was dead quite.
How does this stereo design with the psu V3 card sound one the badger, Does it pay of as monoblocks (witch would double the cases and volume I have available(but nowhere as cool!))
One adjusts how much power the amp has with the rail voltage How low can I go. what does the bias really do? I'am asking because if I go with a 800va transformer of 50v+- I only got about 2cm from badger pcb to transformer.
Is the slowstart from the audiostore ok as softstart module, do I really need dc protection and does the dc protection really affect audio quality?
The thing that has really kept me back was this:
I've previously build jlh designs class a amps and gotten a bad noise from running it as a stereo amp, once in monoblocks it was dead quite.
How does this stereo design with the psu V3 card sound one the badger, Does it pay of as monoblocks (witch would double the cases and volume I have available(but nowhere as cool!))
+-50Vdc into 4ohms speakers is giving ~200W
Two channels comes to a total of 400W. And heatsink to suit.
That requires a transformer from 400VA to 800VA.
Does that all match your expectations?
Can you reduce any of these targets to get a more compact build to fit your small chassis?
Two channels comes to a total of 400W. And heatsink to suit.
That requires a transformer from 400VA to 800VA.
Does that all match your expectations?
Can you reduce any of these targets to get a more compact build to fit your small chassis?
Heatsink is enough for my class a so i recon its all good there, but whats happens if i reduce rail voltage?
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Yes, did build myself in the same kind of case. Jlh 2005 type.
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Well, going for ab now, and want to do it in stereo if possibly without distortion as mentioned in original post
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What are your targets?
Telling us that you are proposing a lower voltage gives us nothing to work with.
Telling us that you are proposing a lower voltage gives us nothing to work with.
ok.
1. One adjusts how much power the amp has with the rail voltage How low can I go.
2. what does the bias really do?
3. Is the slowstart from the audiostore ok as softstart module?
4. do I really need dc protection and does the dc protection really affect audio quality?
5. is the badger much better in monoblock instead of stereo?
;D there I think we have for starters, 😀
1. One adjusts how much power the amp has with the rail voltage How low can I go.
2. what does the bias really do?
3. Is the slowstart from the audiostore ok as softstart module?
4. do I really need dc protection and does the dc protection really affect audio quality?
5. is the badger much better in monoblock instead of stereo?
;D there I think we have for starters, 😀