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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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Chirag, I have some other guys who were asking about the 834P schematic. I just got home and made a picture of my manual with the schematic in it. I do not know if it’s legal. It sort of none-commercial site and I did paid long time ago for my first...
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this is the first time I've seen the schematic of the 834p. Explains a lot. I always thought it sounded foggy and rose tinted with limited dynamic range. There seems to be alot of feedback in there. Having said that I've never found any of ...
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Hello Romy A sleepless night had my all-but-derelict brain going round and around the phono stage and, of course, more questions than answers were thrown up. Did you and your designer friend first try an intermediate version of the 834 circuit which ...
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I have seen some people built 834P with alternative input and output tubes but I never heard them. I personally tried all imaginable 12AX7-type tubes (AZ, AT, AU, 6N2P and many others) in 834P. Some other triodes were king of better “here and there” ...
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Dear AllI am new here, but have been reading quite a bit about the EAR834P from people here who are quite enthusiastic about this design.Thorsten had got me off my butt to build a EAR834P from scratch when he posted his mods at the AA. I still o...
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The very much non-definitive EAR 834P Modification Guide by Loesch Thorsten
Hi,Given that Romy already let the proverbial Cat out of the Bag (pun intended) I think I may have to make good here....
The EAR 834P is a very simple, but rather smartly ...
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[quote user="hagtech"]First, it seems like the tubes are starved. They are running very low current. The 12AX7 is also at low voltage. I'm guessing they are running at about 0.3mA at 65V plate. This operating point is way down...
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Recently, I have become aware of a strange phenomenon after lifting the tonearm at the end of the run-out groooves. The record surface noise keeps going when the stylus is no longer in contact with the record. I am using a Garrard 301 with SME 3...
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I recently could not pass up a good deal on a EAR 834P MM, so I will have the opportunity to compare it to my current phono stage. It is funny since I had planned to listen to EAR phono stage in my system about 10-15 years ago when I lived in Santa M...
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[quote user="drdna"] So you do not recommend the stock tubes? Is it a specific change you recommend?[/quote]
Better tubes will certainly give you better sound, in many cases more sophisticated sound. I do not know what tubes EAR uses as stock tubes ...
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[quote user="Romy the Cat"]I usually hesitant to give any recommendations for “improvement” if a request does not contain any defined and specific complain about the current results.[/quote]Naturally, this makes sense. My question was actually specif...
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I have seen people use 12AU7, 12AT7, the circuitry might be tweaked and it will accept anything. I use a 7025 in second stage (look into the linked thread “Once more unto the phonostage dear friend!”). Hey, I even used a transistor as follower! I kno...
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Hello to everyone, am new to the sight. Been reading for a while and decided to mod my 834. I've had the unit since '96, purchased new from the local dealer. I have noticed a few differences from the schematic, the 220K load resistors R10 and R110...
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looks like heater inductors wrong label on the 834ptf schema. But i guess we dont realy need chokes anyways. ...
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So I decided to try some of the mods mentioned to my semi-recent 834p w/ MC step-ups. It all started with C1 and C7...but then i got into RIAA, upgraded diodes and filter caps. Well, everything should be just stellar on paper but...now I have a hum t...
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[quote user="guy sergeant"] It's polishing a turd though isn't it? I listened to the 834 quite a bit when it came out and thought it sounded poor, even for the price. imho, The circuit's just bad. If you do all that to it it isn't really an 834 anywa...
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I have seen some people built 834P with alternative input and output tubes but I never heard them. I personally tried all imaginable 12AX7-type tubes (AZ, AT, AU, 6N2P and many others) in 834P. Some other triodes were king of better “here and there” ...
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I do not have good-sounding high output cartridges; my most high-voltage cartridge is SPU MONO that is 3mV I believe. I have 5mV Grado $300 Platinum Ref that is high-voltage cartridge but is sounds not seriously. My desire to bring my 3mV SPU via my ...
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The very much non-definitive EAR 834P Modification Guide by Loesch Thorsten
Hi,Given that Romy already let the proverbial Cat out of the Bag (pun intended) I think I may have to make good here....
The EAR 834P is a very simple, but rather smartly ...
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any chance of a similar climb down on the 'adequate but not exceptional' 834P? have a good christmas! Guy...
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hI bRIAN, [quote user="Brian Clark"]The 834P was a revelation for me, being a circuit that I would have dismissed as "old hat" (Feedback? 12AX7 cathode follower? Do me a favour!).[/quote] Me too, but you know me, i'm mainly pragmatic. The EAR 834P is...
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Chirag, I have some other guys who were asking about the 834P schematic. I just got home and made a picture of my manual with the schematic in it. I do not know if it’s legal. It sort of none-commercial site and I did paid long time ago for my first...
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I have seen people use 12AU7, 12AT7, the circuitry might be tweaked and it will accept anything. I use a 7025 in second stage (look into the linked thread “Once more unto the phonostage dear friend!”). Hey, I even used a transistor as follower! I kno...
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[quote user="Paul S"]Adrian, I wonder how you wound up with the never-mentioned FET 10? I prefer it to the EAR 834 I heard. Is this another case where it's full of old caps? I would not be at all surprised if futzing with those caps might yield as ...
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[quote user="Romy the Cat"]I usually hesitant to give any recommendations for “improvement” if a request does not contain any defined and specific complain about the current results.[/quote]Naturally, this makes sense. My question was actually specif...
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[quote user="Romy the Cat"]Brian, and how do you find your MOSFET behaves compare the 12AX7-based cathode follower?[/quote]Romy, I have yet to try. Only got them on recommendation very recently. They're cheap enough to try in a B9A plug-in without al...
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Hi All, 103 or 103R + mass loaded SME headshell + 3012 or a 3009 + Seiki 1500 + hagerman opamp phono stage (good only with select parts and battery power) or an EAR 834 (with some mods) and some old Altec mic t...
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Hi Guy, [quote user="guy sergeant"]My experience with the 834p stemmed from having one at home for about a year soon after it was launched. I did try different types of ECC83 in it which did change it's balance slightly but not enough to make me like...
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[quote user="Paul S"]Romy, I have noticed the same thing with the phono stage power supplies, that the big multi-chassis units with dual 100 lb. PS get no overall sonic advantage, all said and done. So how do we deal with the stupid, lousy AC that is...
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What would be good place to start? I am using custom built 834P and S&B 103s. Also, my tonearm is 9-inch SME M2, should I put some additional weight on it?Thank you....
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