Hi Oli
The last time I saw a waveform similar to that is was pretending to be a broken output FET.
This is very basic principles here, imagine trying to reach the far side on the moon on a 50cc Vespa, never mid breaking free from the Earth's atmosphere just trying to hot 35mph would be a bloody miracle!
Coherent Systems
Real high end sound with musicality not hifi
Location: Mildenhall, Suffolk
Posts: 380
I'm John.
If a Moped constantly did 55 mph over 24 hours, it would get to the Moon in a 180 Days.
Obviously it would need a little assistance, like maybe a road to make this a reality.
"lack of passion is fatal"
Vinyl: Thorens TD-124mk2 / SME-312 Aluminium 'special' / SME M2-9R / STEREO: Etsuro Urushi Cobalt / Shure M3D / Ortofon SPU A95 / Cartridge Man Music Master / Shure - SC35C (US) / SAEC C3 MC MONO: Miyajima Zero B 0.7mil mono / Miyajima Premium 1.0 / Amps & SUTs: Radford STA25 mk3 / AD Audio 'Satchmo2' pre & LCR phono / Hashimoto HM-7 SUT / ETR-MONO SUT Digital: Audio Note 4.1 (with DAC5 upgrades) DAC / Roon / Tidal Speakers: Tannoy 12" MGs' in RFC custom 'Rutland' Cabinets with RFC crossovers / Tannoy ST-100 Super Tweeters Cables: LFD Grainless phono / RFC Mercury / Duelund DCA16GA tinned copper / Kimber 12TC / SW1X Audio Design USB-SPdif / Duelund DCA20GA interconnects / SW1X Audio SPDIF Aero 6 / Mains Power Conditioner / Box Furniture rack / Audiodesk Systeme Vinyl Cleaner / a very beautiful & understanding Wife!
I could point out save is a vucuum and no air s n combustion but sorry off topic
Suspect Aan has managed to rectify to basic problem quite easily
Coherent Systems
Real high end sound with musicality not hifi
Sooo, back to the Valab
Its been left on for a week and had probably 15-20 hrs of records playing. I've spent a bit of time fiddling with the settings and so far the Fidelity Research FR-1 Mk3 that's currently hanging off the Bergmann seems to prefer 200 ohms and a gain of 67 db. Quite pleased with it tbh, regardless of the money it sounds pretty good so far. Very very quiet.
Next step is to experiment a bit more with different gain settings, and then have a go with the MC head amp set on zero gain and the Valab at MM output. There's 4 impedance settings on the H-Z1 to play with inc 470 ohms to compare.
"lack of passion is fatal"
Vinyl: Thorens TD-124mk2 / SME-312 Aluminium 'special' / SME M2-9R / STEREO: Etsuro Urushi Cobalt / Shure M3D / Ortofon SPU A95 / Cartridge Man Music Master / Shure - SC35C (US) / SAEC C3 MC MONO: Miyajima Zero B 0.7mil mono / Miyajima Premium 1.0 / Amps & SUTs: Radford STA25 mk3 / AD Audio 'Satchmo2' pre & LCR phono / Hashimoto HM-7 SUT / ETR-MONO SUT Digital: Audio Note 4.1 (with DAC5 upgrades) DAC / Roon / Tidal Speakers: Tannoy 12" MGs' in RFC custom 'Rutland' Cabinets with RFC crossovers / Tannoy ST-100 Super Tweeters Cables: LFD Grainless phono / RFC Mercury / Duelund DCA16GA tinned copper / Kimber 12TC / SW1X Audio Design USB-SPdif / Duelund DCA20GA interconnects / SW1X Audio SPDIF Aero 6 / Mains Power Conditioner / Box Furniture rack / Audiodesk Systeme Vinyl Cleaner / a very beautiful & understanding Wife!
If you put a square wave through an RIAA network surely that is what you'd expect?
Otherwise, what exactly do you think it should be doing with the high frequency component of the waveform? If it let it through unaltered it wouldn't be much use in eq'ing the output from a cartridge playing a record.
Here's an Aurorasound Vida reproducing a 1 KHz sine wave.
and here is the same phono stage applying RIAA correction to a 1 KHz square wave
That's what it's supposed to look like. You need to remember what a square wave actually is.