Maybe the user 6L6 can help in matching BC5xxC or B type. Other transistors can also be used, basically anyone can use their favorite small-signal (low noise) transistors here.
I understand that very well Patrick, I had the vague hope that Jim T. would also be happy to help you in this regard. Then there will probably never be a direct comparison with the other competitors ... 😉.
Let's see, maybe I'll find my files on real hard disks at some point, then I'll send you the files via PM. In the meantime, there are already two projects with available layouts, namely oread and supra24.
All the best,
HBt.
I suspect this is a case of optimistic models, looking at the datasheet for 2N2484 reveals nothing special in fact it should be very similar to BC550C or BC109C, it is also a very old component hardly available.
2SD2153 seems very good in SOT-89, if that is hard to get you could also use BCX56-16 as input transistor, it is a very common and cheap component available from most suppliers.
So I put the EXact MC pre in front if the Preconsonant like this:
We maybe choose 2SC 2240 GR and 2SA 970 GR; but with the historical bipolar transistors, MC12 certifies an SNR of 80dB (unweighted, bw2k by riaa, 5mV) - and this would now have to be verified in practice.
But your consonant looks nice, please report on the result and tell us which MC system you use. I only use AT-OC9, Denon DL103 and Ortofon Quintet red.
{
R30 -> 100Ohm
PSU for EXakt MC-Pre
}
The main thing is that it doesn't crackle, it doesn't pump -> i.e. you should really test the selected AF transistors, i.e. analyze the resulting noise and interference behavior. In the simplest case, this means listening through a fully turned up headphone amplifier.
We place the connected pickup in the groove with the drive de-energized.
Dear MartinX,
Please tell us about your results with this simple (and not at all unknown) MC-Pre.
👍.
regards,
HBt.
But your consonant looks nice, please report on the result and tell us which MC system you use. I only use AT-OC9, Denon DL103 and Ortofon Quintet red.
{
R30 -> 100Ohm
PSU for EXakt MC-Pre
}
The main thing is that it doesn't crackle, it doesn't pump -> i.e. you should really test the selected AF transistors, i.e. analyze the resulting noise and interference behavior. In the simplest case, this means listening through a fully turned up headphone amplifier.
We place the connected pickup in the groove with the drive de-energized.
Dear MartinX,
Please tell us about your results with this simple (and not at all unknown) MC-Pre.
👍.
regards,
HBt.
@MartinX
I have prepared a small puzzle for us in the file attachment:
"a consonant with an exactly defined output resistance of 50 ohms, an SNR of greater than 100 dB and another special feature - can you determine the missing component sizes in such a way that the deviation of the equalization remains within the limits of +/-0.15 dB? Tell us the values."
After that I'd like to stay on topic in this thread, for RIAA excursions and other nastiness I've created the Haudegen thread as a container.
greetings,
HBt.
I have prepared a small puzzle for us in the file attachment:
"a consonant with an exactly defined output resistance of 50 ohms, an SNR of greater than 100 dB and another special feature - can you determine the missing component sizes in such a way that the deviation of the equalization remains within the limits of +/-0.15 dB? Tell us the values."
After that I'd like to stay on topic in this thread, for RIAA excursions and other nastiness I've created the Haudegen thread as a container.
greetings,
HBt.
Attachments
The
AT-OC9
Technics SL-1210MK2
or the DL-103
Pro-Ject RPM 5 Carbon
are a revelation in combination with the simple EXakt MK2 equalizer. If you want to be carefree, plug and play, you should give this design a chance.
I am always amazed at how neutrally and absolutely naturally this chain reproduces every genre without fault.
regards,
HBt.
AT-OC9
Technics SL-1210MK2
or the DL-103
Pro-Ject RPM 5 Carbon
are a revelation in combination with the simple EXakt MK2 equalizer. If you want to be carefree, plug and play, you should give this design a chance.
I am always amazed at how neutrally and absolutely naturally this chain reproduces every genre without fault.
regards,
HBt.