Keith Cooper mentioned today the AllnicAudio’s 1500 phonostage in the Cessaro thread…

http://www.allnicaudio.com/E/e_pdt_ampli_H-1500%20II%20SE.html

I know the AllnicAudio, I use their tube sockets, and they are very good.  The AllnicAudio uses a pair of 417A for their phonostage. I am not a big fun of those tubes and 600R load for those little pentodes is too much but still it very much might be a good phone corrector.

The AllnicAudio in thir web site point out some shortcomings of different correction topologies – very superficially and they are not completely correct unfortunately. Regardless of it the subject of the LCR EQ is very interesting. I have one and I do like it a lot, although my personal “reference” corrector is not the LCR type.

Thorsten have eaten a dog on the LCR subject and his 7788 corrector was very good. I changed it for 7788-7721 and it was even better. I heard that Thorsten made the 10K LCR filter that should be very interesting but I did not follow the subject very close for years and I found “other solution” to deals with the problem of the constantly recharging feedback capacitors.

Another attractive company did a few years back a very interesting LCR phonocorrectors. It was the DaVinciAudio from Switzerland. In their initials version it was very cool but I heard nowadays they went for it’s commercial version, hugely simplified….

http://www.da-vinci-audio.com/Grandezza/grandezza.htm

I still generally very welcoming the LCR correctors, I wish it was more of them. There are a dozen companies about which I heard that do them. The Thorsten’s approach with 7788 at input is the more appealing to me (7788 has better sound and lower noise, particularly if to play with screen’s supply) but the 7788/E810F is not a tube that have any mass-commercial potential and therefore it is overlooked by the manufactures who dream to become a second BAT.

Anyhow, here is the Korean’s AllnicAudio attempt around the 417A/5842… I wonder if they paralleled the input tubes to drive the low impedance LCR filter?

Where are those 80dB of gains with my 2 stages only????!!!

a Hong Kong-based company DIY Hifi Supply is selling RIAA EQ modules, the first modulesthat I have seen at 10kOm. It is something that Thorsten did not do commercially… but if the silks sound good then it might be VERY interesting. Is anyone knows anything about this company and about those modules? The 7788 with 10K load will be VERY cool thing to try….
 
http://www.diyhifisupply.com/diyhs_magnetics.htm

I have read about but not heard the transformer RIAAs and the "No R" version (or was it "no C"?), and I have seen some fairly ingenious ways to try to keep impedance at a constant 600 Ohms.  But the 10k does pique my interest, because now we have the slack to make a real-life, semi-flexible gain stage that might not mess up the RIAA values.  Maybe stand off the tubes with diodes?  Hybrid cascode?

I can do OK with ~40 dB net, so two stages still seems like the reality, and probably the usual "sandwich", with the RIAA between the gain stages.  I don't get one gain stage.  Why/how would you do that, unless you just fed the signal to another gain box?

I'd like to try something like 1/2 of  a 6SN7, with that tone, but less going on internally.

The Da Vinci looks very cool, but I ass-u-me it's priced for punters only, didn't even check the price.

Lord knows, I need a few more transformers in my signal path...  another topic perhaps, but probably germane to this topic.

Best regards,
Paul S

coops wrote:

Cello HI  I have only heard the Cole for a short time, so it wouldn't be fair to compare, also I really can't say to what extent the LCR circuit contributes to the sound of the 1500, the Allnic is very dynamic, has high resolution and makes instruments sound more like instruments , I am using the head amp with it at the moment and it is super, really super, worth a listen and not  high-end expensiveeeeeeeee.

coops wrote:

Romy Hi, I only represent  Cessaro in the UK now  because I  honestly believe in them, I don't represent any other makes or manufacturers, Ralph introduced me to Allnic ( he had tracked down the designer Mr Park )we compared the amps to the usual suspects Zanden Wavac Air Tight etc and the Allnics were speedier had more punch and better resolution, can't sell them even if I wanted to because they havent passed the European CE compliance legislation , I am ceretainly not going to bang on about them on your forum, I do think Mr Park  has some interesting designs which are properly realised ,and the amps offer a lot for their relatively reasonable cost. Keith.

Keith,

I do not know why you go crazzy over it. All that is necessary is juts to mention that you are distributing given audio equipment and it would be it….

Anyhow, the Alnick RCL phonostage, the H-1500 II SE one, do you know anything about it? It has 3 WE417A tube per channel and it looks like a follower. The WE417A are high gain (If I am not mistaken 30 times) and 3 stages can easily do 66dB. Dose Alnick use all 417A as gain stages or they parallel them to drive low impedance RCL filter? In such case do they use a step up transformer to get MC gain? If they do use transformers then who made for them the magnetics? Is any further topological information is available on the Alnick unit? What is the retail price for the H-1500 II SE correctors?  Also, since given corrector is MKII then what was in the MKI? And the last thing. How people can try this phonostage?

Recently I was visiting a guy who has Alnic H-1500 LCR Phono stage. I actually had a chance to open it up and to inspect it.

http://www.allnicaudio.com/eng/products/view.htm?brandcode=0010040000000002&page=1

I would say that I like what I saw and how it sounded. It was not might playback and I do not know if it truly did what I would like a Phonostage to do but the initial superficial feel was very positive. The Alnic H-1500 has a pair of paralleled 417A driving output stage. I did not trace which the E282F of 417A in input and which is used as driver. It would be fun if the Alnic’s LCR would be high impedance then the input stage would drive the filter directly, skipping the driver stage all together.

Nevertheless it looks like an interesting phonostage. Too bad I do not care about phonostage anymore or I would bring it home to try…

Thanks, Keith and Montepilot.

I did have my 7788-7721 phonostage with LCR filter and I always liked it, pay attention - it was 68dB gains with just two stages and with NO step-up transformer.  Allnic  Phono is 3 stages with step-up transformer. Still Allnic might be a good phonostage but I see no personal motivation to “evaluate” it. It is not become I feel anything is wrong with Allnic. I just have a phonostage that I feel comfortable and I have zero itch to look for anything else.