atmasphere
Responses from atmasphere
| amplifier DB meters Hi Bob,I heard that and we're thinking of making the ride (probably on the SF2). The SFC and the MV Agusta 750S are some of my dream bikes... | |
| amplifier DB meters Hi Bob, if you're using a VU meter, the thing to do is to calibrate it against the load you're using- in this case your 4 ohm speakers. To do that you'll have to measure the output voltage of the amp and then calculate the current to then get to t... | |
| Difference between SET and push-pull using 300B High capacitance is not that strange in a speaker cable, as the capacitance contributes to lowering a quality known as characteristic impedance. When the characteristic impedance of a cable matches that of the speaker, you get a little more effici... | |
| what does loading on back of pre-amp for phono mea The loading inputs are for loading resistors. Both MM and MC cartridges have ideal loading that is less that the stock 47K of the preamp itself. So (wisely) they made a provision. | |
| Equilizer to reduce surface noise on bad records? Cal208, I would also recommend that you look into the cartridge loading. If the cartridge loading impedance is too high (47K for example- no cartridge I know of actually loads at that impedance although many say that in the specs) the cartridge wi... | |
| what does loading on back of pre-amp for phono mea Wouldn't that be the setup for the cartridge loading resistors? | |
| Difference between SET and push-pull using 300B The primary issue between SE and PP is the output transformer, although PP often has some additional circuit complexity. But its the transformer that makes the difference.When running PP, the signal has to go from positive to negative and then the... | |
| Has anyone upgraded their preamp with V-caps? Sherod, IMO if you are going thru the trouble and expense of replacing the coupling caps, do yourself a favor and put the good stuff in. Its not that much more! | |
| amplifier DB meters Hi Bob, VU meters usually have averaged response and don't show the peaks. LED-style units exist that do show the peaks; having watched a lot of these it appears that your typical peak is 3-6 db above the reading on an averaging meter, IMMV (defin... | |
| Can't find old thread on Balanced XLR phono cords Hi Groovey, seems to me there were several recently, focused more on balanced phono sections and the like.We've used this setup since 1989 and before us no-one was doing it.Any cable manufacturer can make a cable for you. If you have a five-pin pl... | |
| Efficient Dynamic Speaker with low-end punch? Classic Audio Reproductions can suit the bill with either the T-3 or T-1. Both are about 96-97 db with real bandwidth to 20Hz. Also a very revealing speaker and an easy setup in most rooms- I have mine about 6" from the rear wall. Easily driven by... | |
| Has anyone upgraded their preamp with V-caps? Sherod, the output of the MP-1 is direct-coupled; the pair of 0.1uf caps (the unit is also differential) are between the voltage amplifier and the vacuum-tube output buffer. | |
| Has anyone upgraded their preamp with V-caps? Just a note to those thinking of making the change (which we think is very worthwhile)Its a good idea not to change the value. Increasing the value to get more bass may cause the low frequency cutoff to go too low- lower than the power supply low ... | |
| Tube handling/designations Heat is the enemy of tubes- they ought to be kept clean of dust and fingerprints for the longest life. 6DJ8s and 6922s are capable of running a fair amount of current and so can get quite hot. | |
| amplifier DB meters We set the meters on our amps for full power full scale and 1 watt full scale. However they are calibrated for an 8 ohm non-inductive load. Any variance in the load will throw the reading off, sometimes quite a bit. They are handy for relative pow... |