dhl93449

Responses from dhl93449

Active FETs vs. Step-up phono stage designs
One challenge facing designers who wish to use solid state these days is the rapidly dissappearing discrete transistor. Good low noise parts (both bipolar and FET) are becoming harder and harder to find, because the mass market electronics industr... 
Optimum MM cartridge loading
$6000 is "affordable"?I guess I live on another planet. 
Audio Desk Record Cleaner-Anyone buy one yet
Jyprez:Be careful with ultrasonic cleaners. They can easily pit and damage surfaces unless matched with the materials being cleaned. When I worked for AMAT (a semiconductor equipment manufacturer) some years back we tested ultrasonic cleaning syst... 
Impedence change with cables and sub
I would recommend you stay with connecting the sub via the high level outputs from your power amp. In that case you will not have any impedance loading issues, and you also don't need to worry about the power amplifier gain vs the gain in the sub ... 
Impressions of PS Audio GCPH
Michel:With all fairness to PS Audio, how can you blame them when the product sounds much better directly connected to the power amp? Adding any amp in between is most likely to reduce the quality of the sound, but that is not the fault of the GCP... 
Getting Rid of a Ground Loop
Common problem when you attach TV w/cable to audio equipment. Had the same problem and it turned out to be grounding of the cable. When the cable was physically disconnected from the system, hum went away. When it was connected, it came back.I tri... 
Impressions of PS Audio GCPH
Michel:Maybe you have a problem in the GCPH? If it's still under a warranty (and even if not, PS Audio is very liberal with potential warranty issues), I would contact PS Audio and explain your situation. I would think that maybe you have a proble... 
Help - need advice on B&W Nautilus 802 stands
I second the plinth idea with the addition of 3" brass footers under the plinth. It will be a tough job getting these up on the plinths, however.I have this setup on my B&W 803ds, with 2" brass footers between the speaker and the plinth, and 3... 
Periodic replacement of Audio Grade Fuses?
I do not suggest that this manufacturer is correct, however fuses do wear, depending on how close to their rating they are used. Typical fast blow fuses are spec'd to carry the full current rating continuously (well almost, for more than 1 hr), an... 
The Best Way to Clean Records
Creative:How can you be sure you get all that glue residue out of the microstucture of the grooves? That is what bothers me about it. You are relying on the glue being a continuous structure that does not break apart when being pulled off the record. 
Mapleshade Steamer Kit.....anyone?
As the inventor of a number of patents on the use of high purity steam to clean semiconductor grade silicon substates, I can tell you steam cleaning can be extremely effective. However, there are numerous variables that impact its outcome:1) The a... 
The Best Way to Clean Records
This cannot be as bad as the wood glue methods for cleaning vinyl.http://www.youtube.com/watch?v=yuNc6ZP9Yrs 
Is there a list of cartridge capacitance?
MC carts are affected by capacitance. Its just that the values are generally much greater than those that affect MI or MM carts, due to their much lower source impedances. It will affect HO MC more than LO MC.On the vinyl engine site there is a ca... 
Tonearm Noise
I can hear a microphone type of noise from my ADC LMF carbon fiber tone arm. Has a "wood" type of sound if you tap it sharply or move it up and down within its rest clamp. You need high gains in the phono pre-amp to hear it though. With an AT 150M... 
are my amps clipping?
Are those fuses protecting only the tweeters? 3/4 amp is a very low fuse rating, its less than 5 watts into 8 ohms.What range of the audio spectrum are you boosting with the EQ?