2N2222A phono preamp

[Alex Ra]

Gentlemen, permit me to demonstrate the sound of 2N2222 with my anki-skin-effect cables - by the sampled record of Ben Webster (saxophone), Jazz, 1977.
Ben Webster (1977) "Wrap Your Troubles In Dreams" (LP) vinyl - YouTube
I have made this sampling a year ago, in winter 2019.
Note 1: this vinyl sampling was made BEFORE upgrading receiver's power supply. Now the sound is 50% even better.
Note 2: the stylus of MM head Grado Silver (re-branded as Pro-ject K6) is now broken and I am unable to re-record the disk with improved PSU.
Note 3: this is digital. I value the sound of this song on YouTube at 50...60% of the original digital sampling at 128 kHz-24 bit.
Note 4: I value the digital sampling 128kHz-24bits at 30...40% of the sound of vinyl disk.
Note 5: Thus you now hear 15-25 % of the vinyl sound.
Enjoy.

 

[Arnolddew]

Very nice. Glad that this topic is alive agian. I have build the Ivey phono. But i strugled with the ground/pcb layout and power supply. My skils are basic. But i wil do another try soon. I did had a lot of noise. But what i did hear was pure music/signal flowing tru. Just the way i like it. I heard a lot expensive pre amps. But it's not for me.

 

[Alex Ra]

Another example of sampling from vinyl via 2N2222:
Song "Time" from "The Dark side of the moon" 1973 Pink Floyd.
Very difficult to reproduce/sample due to very tight spectra.
"Time" Pink Floyd (1973) "The Dark Side of the Moon". Vinyl (LP). - YouTube

 

[bepone]

i'm listening on my hifi 🙂

 

[robertor]

hello to all.
wanting to build it during the Christmas holidays, which scheme should I follow?

Thanks in advance.

 

[Alex Ra]

hello to all.
wanting to build it during the Christmas holidays, which scheme should I follow?

Thanks in advance.

I think Hans Polak's circuit on page 19 is most close to Ivey's and 1970 schematics.
2N2222A phono preamp
Do not forget capacitance multiplier in PSU after regulator before this circuit. No way to get real music without it.

 

[robertor]

what do i find in post # 15?

 

[Alex Ra]

what do i find in post # 15?

Nope.
That was a regulator that looks like capacitor multiplier. You have to add any capacitance multiplier from tons of schematics of this site. At the beginning you can start with simplest LM317 IC regulator, then add cap multiplier.

 

[Alex Ra]

Let me add some additional notes about spectras (this is not about evil company from "007" movie series):
Musical spectra on some vinyl disk is so tight, so rich, - that it is difficult to reproduce it on any equipment, of any price. Examples: albums of ELO, especially "Time", "Secret messages", or Boney-M "Christmas album". Sampling it to digital is a real challenge, because you always obtain mess in middles and chorus. It is usually very hard to get distinctive, separated voices in chorus.
Therefore tube phono amps on YouTube most often demonstrate jazz records with small number of instruments. But modern tube phono preamps often (if not always) fail on chorus, because tube's "nice" second harmonics destroys chorus.
For example "nice" sounding tubes with artificial harmonics:
Caravan - Ben Webster /Analogue Productions [ VPI Avenger Reference / Kiseki Purple Heart N.S. ] - YouTube
Ivey (and 1970 schematics and 2N2222's designers) says to us
"Chorus?
Tight spectrum?
No problem!"
Here I have just published another samplings by 2N2222 schematics, with tight chorus:
"White Christmas" BoneyM 1981 HD audio, Vinyl (LP) - YouTube
"Mary's Boy Child" Boney-M 1981 "Christmas Album" HD audio, Vinyl (LP) - YouTube
This is a Christmas gift to all music lovers from me, and from my 16-years son, who has made anti-skin-effect cables for these records, and helped me to replace old transistors in TRIO receiver by 2N2222.
Enjoy.

 

[robertor]

can you recommend one?

 

[Alex Ra]

Cap multiplier

can you recommend one?

Capacitance Multiplier Power Supply Filter

capacitance multiplier | DIY Audio Adventure and Others

 

[bepone]

I think Hans Polak's circuit on page 19 is most close to Ivey's and 1970 schematics.
2N2222A phono preamp
Do not forget capacitance multiplier in PSU after regulator before this circuit. No way to get real music without it.

quoted schematic is not ivey schematic.. ivey put 82k in feedback loop,above is 1k..
btw here is simulation, not bad

 

[robertor]

Capacitance Multiplier Power Supply Filter

capacitance multiplier | DIY Audio Adventure and Others

so with LM317 I adjust the output voltage.
downstream of the LM317 I will mount the multiplier?

 

[Alex Ra]

so with LM317 I adjust the output voltage.
downstream of the LM317 I will mount the multiplier?

Yes. We talk about power supply, not schematics of phono stage itself.

 

[bepone]

this one is more like orig. schematic after correction, from pg 2, adjusted for normal MM cart load 47k.. cap to the ground from the base of first Transistor is 1n because 1uF doesn't work and i think 1n - 1u is just misspelled by Ivey.
base stopper 100ohm, feedback 82k, collector resistor 6k8 where ltspice starts to work normally. i like small bass boost in this version and light feedback

 

[robertor]

Yes, power supply.
Voltage: 30v.

 

[robertor]

Something like this:

After the LM317.

 

[Alex Ra]

this one is more like orig. schematic after correction, from pg 2, adjusted for normal MM cart load 47k.. cap to the ground from the base of first Transistor is 1n because 1uF doesn't work and i think 1n - 1u is just misspelled by Ivey.
base stopper 100ohm, feedback 82k, collector resistor 6k8 where ltspice starts to work normally. i like small bass boost in this version and light feedback

Stop, stop.
R7 = 1k is a DC feedback, not AC.

 

[Alex Ra]

Something like this:
After the LM317.

Yes.

 

[Alex Ra]

Someone, tell us a couple words about "my" YouTube records, mentioned earlier, sampled from vinyl via 2N2222.
Your opinion?