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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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Hello again KIS
With unbypassed cathode resistor the input ECC83 is giving a gain of 30, adding the bypass cap boosts this to more than 60 thus gain will have more than doubled.
I can't try this mod yet because the 834P currently in my system i...
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[quote user="starboy"]A friend has a fixed headshell model S2 and is about to trade for a detachable;just for convenience but worries if there is any extra sonic merit in the model he alread has? Any idea Mr B____ [/quote]
Obviously the fixed head...
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I do not read German but here is another renderation of my 834P
http://www.jogis-roehrenbude.de/Leserbriefe/Martin-Ruppel-Phonoamp/MRuppel-Phonoamp.htm
I do not know what Martin ended up with and how it sound. It looks like he use...
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I actually woke up today at 6AM, check all settings on my arms (after a few month of not working), demagnetized the needles and was spinning records all mooring. One of the benefits that I got with new phonostage is that the grounding patters for all...
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[quote user="Brian Clark"] My stereo corrector (834P with air-vane caps) has a shorting switch across the two channels at the input. I suggest you incorporate the same.With it out of circuit I did indeed get that hum you refer to with the SPU Mono. S...
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Will I be listening to all my sources via the inverse RIAA?
Well, the question was sarcastic but it has some rational grains. If the signal passing via the 834PTF-Air does receive some positive attributes despite of the presumed nastiness of t...
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[quote user="difool"]What is the benefit of using 834PT in dual mono over a stereo 834PT? [/quote]
That is a good question and I asked myself it numerous times. My current standing is the benefits are purely intellectual as I am not able to observe ...
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[quote user="guy sergeant"] I've usually found valve rectifiers to sound preferable. [/quote]
For HF channels only. Still with shaft switch diodes and properly implemented input choke filters there is not advantages of tube rectification, quite oppo...
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[quote user="rafaroxlm"]As you may know the 7788 is a high transconductance pentode which should in theory be able to give higher audio resolution than say 12AX7, 6072 tubes in tube mic pre designs. On search here the 7788 was mention...
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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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I have for a month or so the Allnic H-1500 II SE Plus phono stage sitting in my home. It is two chassis phonostages with tube rectification, tube regulation, LCR 600R filters, own Allnic step up transformer for MC needles, 5842/417A in gain stage...
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It is kind of nice to see that someone have embraced the
idea of “End of Life Phonostage”. A gentlemen from I presume Asia have assembled
the 834PT-AIR and it look like he likes it.http://mellowgroovy.blogspot.com/2015/06/monday-modify-end-of-l...
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[quote user="Brian Clark"] Whereas I do. deParavicini's worked on designs in Japan over several years and became familiar with the research going on there in the Seventies which culminated in identifying the HD decay-spectrum as a key indicator...
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