Thanks guys,
I have a 5k trimmer in the offset and 500 trimmer with 680R resistor in the vbe. I didn't realize they even make a 4.7k trimmer. If it is important I can order some. I have the boards ready except I am waiting for some 0.68R 2
3W resistors. As soon those arrive I will be testing. Thanks for the help.
Blessings, Terry
I have a 5k trimmer in the offset and 500 trimmer with 680R resistor in the vbe. I didn't realize they even make a 4.7k trimmer. If it is important I can order some. I have the boards ready except I am waiting for some 0.68R 2
3W resistors. As soon those arrive I will be testing. Thanks for the help.
Blessings, Terry
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pots and trimmer generally come in E3 values, 10, 22, 47 (or 50) and all the decade multiples
a
The tolerance is usually +-10%
so a 4k7 could be from 4k23 to 5k17, whereas a 5k could be from 4k5 to 5k5.
Note the big overlap.
a
The tolerance is usually +-10%
so a 4k7 could be from 4k23 to 5k17, whereas a 5k could be from 4k5 to 5k5.
Note the big overlap.
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I guess the question is whether or not the 300R difference across the circuit makes a difference.
That was not the question. I'm asking either Mile or someone who built the A33 if the circuit works properly with a 5k trimmer or if there are other changes needed if the 5k trimmer is used.
That is the question you should be asking yourself.
If the tolerance is bigger than the difference, then in what circumstances could the difference in absolute value affect operation?
I would answer: "none".
They are effectively the same.
Use either a 4k7 pot, or a 5k pot, they are equivalent.
If the tolerance is bigger than the difference, then in what circumstances could the difference in absolute value affect operation?
I would answer: "none".
They are effectively the same.
Use either a 4k7 pot, or a 5k pot, they are equivalent.
Tested Apex AX9 today with OPA2604 opamp and its 
. I like the sound on my PC monitor speaker currently I'm playing it with Apex NX-14. 
. I like the sound on my PC monitor speaker currently I'm playing it with Apex NX-14. Attachments
Tested Apex AX9 today with OPA2604 opamp and its
Nice work, can you compare AX9 with NX14?
Regards
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😀
Looking for a large enough, simple, vintage housing. I'm thinking of dual mono with 2 traf of 180watt each. I have the traf, and I think 180 watt traf for each channel is more than enough for what I need. (46V +/-)
90% of listening time is under 1watt for me, the rest is😀😀
Regards, Laur
I will.
Looking for a large enough, simple, vintage housing. I'm thinking of dual mono with 2 traf of 180watt each. I have the traf, and I think 180 watt traf for each channel is more than enough for what I need. (46V +/-)
90% of listening time is under 1watt for me, the rest is😀😀
Regards, Laur
Hello guys
I have an idea because I always have the problem where I can place the power supply board on the case, so I place a capacitor bank and RL on the PCB to see how it looks 🙂
those caps are 22,000uF 63V so far I like the idea what you guys think ?
Regards
Juan
I have an idea because I always have the problem where I can place the power supply board on the case, so I place a capacitor bank and RL on the PCB to see how it looks 🙂
those caps are 22,000uF 63V so far I like the idea what you guys think ?
Regards
Juan
Attachments
Attachments
maybe you should do 2N5551 in Darlinton with BD139 or even better MJE340 to get more hfe and to drive that relay with stronger/more powerfull transistor. usually relay coil uses about 20-40mA but that one can take 100mA,so BD or MJE would be a good choice to drive it...