I like WIMA MKP10 ... have used them in all my preamps, also in M2.
Best regards, Claas
I can also recommend Clarity Caps and yes they are better as you go up the price scale...
Best bargain are Russian PIO, that is what I used in my BA3 as Preamp 🙂
Best bargain are Russian PIO, that is what I used in my BA3 as Preamp 🙂
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John, any specifics with the Russian PIO? I've read anecdotal things about the ones with "Ch" suffix are better suited to AC and have better frequency characteristics (for whatever that really means), and the "KBG" ones have been described as having aluminum foil - paper - aluminum foil - paper layered construction. The rest seem to be more generically described as "sputtered/metalized" ...
Eric, I’m most fond of the sound from the rectangular can variety. The letters are not available on my key board. They are sometimes called MBGO. You won’t need high voltage ones. I used the 160 volt rated. I do give the sonic edge to the 630 volt rated variety but they get very big very fast - just pick a well liked seller from that famous web site 🙂
Do note that often you need to isolate the shell of these metal can pio from the chassis and ground 🙂
Do note that often you need to isolate the shell of these metal can pio from the chassis and ground 🙂
I user Janzen Audio Silver Z. Not cheap, but supposed to be premium quality. A bit too big for the boards but could manage to fit them.
I had to build a brace work to hold my 10uF caps above the board. Unless you lead wires are quite long, remote mount of large caps is a viable option.😉
Hello;
I am making my way thru the thread ; but still i can't find if anyone mentioned the current consumption@24V of the preamp.
Can anyone tell me ?
I am making my way thru the thread ; but still i can't find if anyone mentioned the current consumption@24V of the preamp.
Can anyone tell me ?
Thanks for the ultra fast response!
I find puzzling that the overall consumption of the gain stage is so low! Can you please walk me thru why is 45mA?
I am thrown off by "The bias current here is about 50 mA,
and it will deliver peaks of approximately 100 mA. Q3 and Q4 require heat sinks"
....because it is a preamplifier. It will drive the input of a power amplifier. Let's say that the input impedance of the power amp is 10k ohms. 100mA pk from the preamp into 10k ohms is 1000 volts peak.
100mA is overkill if driving a 10k ohm input impedance.
If the amplifier has a 50 ohm input impedance, then the drive voltage will be 5v pk. If you need more than 5v pk inot 50 ohms, then up the bias.
Wiring BA3 preamp - off topic
6L6
Here are the photos as discussed.
https://hfc-fs.s3-eu-west-1.amazonaws.com/s3fs-public/elma_2p6w_wiring.pdf
Thank you in advance.
6L6
Here are the photos as discussed.
https://hfc-fs.s3-eu-west-1.amazonaws.com/s3fs-public/elma_2p6w_wiring.pdf
Thank you in advance.
Attachments
Enough?
Hello.
I am currently shopping parts for the BA-3 preamp.
I have a finished +- 18V, 1A regulated supply from a previous project laying in a drawer.
Will this be usable/good enough for this build?
Thank you!
Hello.
I am currently shopping parts for the BA-3 preamp.
I have a finished +- 18V, 1A regulated supply from a previous project laying in a drawer.
Will this be usable/good enough for this build?
Thank you!
I have a fine black belt in my closet
Will this be usable/good enough for jeans I'm wearing?
(in other words , be more specific)
Will this be usable/good enough for jeans I'm wearing?
(in other words , be more specific)
If your belt is long enough, and you like the colour, I guess it would be okay! 😛
I asked, because most (all) builds I have seen are done with minimum +-24V and 100W+ transformers, and I was unsure if +-18V 1A would be enough to make it sing!?
Thank you!
I asked, because most (all) builds I have seen are done with minimum +-24V and 100W+ transformers, and I was unsure if +-18V 1A would be enough to make it sing!?
Thank you!
just go for it ....... that's plenty of Cojones ...... even if few volts more could be better
I was more interested in quality of spoken PSU/reg ......
I was more interested in quality of spoken PSU/reg ......
BA3 pre up and running
Finally finished my BA3 preamp. I had lots of assistance from forum members including 6L6 and jwilhelm. Greatly appreciated. It is up and running with no problems(yet). Just need to tidy up the wiring in the preamp chassis. Will set bias later once I finish the Pearl 2 and the F5Turbo. Almost done the Pearl 2 but waiting on transistors from the diystore to finish the F5t.
Thanks
Finally finished my BA3 preamp. I had lots of assistance from forum members including 6L6 and jwilhelm. Greatly appreciated. It is up and running with no problems(yet). Just need to tidy up the wiring in the preamp chassis. Will set bias later once I finish the Pearl 2 and the F5Turbo. Almost done the Pearl 2 but waiting on transistors from the diystore to finish the F5t.
Thanks
