ramtubes
Responses from ramtubes
| This is juvenile... Linda RonstadtEmmylou HarrisPatsy ClineBilly HollidayThese are my favoites to listen to but for living with I would take Emmylou for her lovely personality. Watch her interviews on YouTube. | |
| Autoformer vs Speaker impedance Curve almarg8,371 posts09-14-2018 1:08pmRalph, would I be correct in thinking that the low B+ voltages that must be used for the 6AS7G power tubes in your amps, compared to the much higher B+ that is supplied to the tube types used in most non-OTL amp... | |
| Autoformer vs Speaker impedance Curve So far I see this discussion has entirely ignored the resistance of the wire back to Hoover Dam. You can very easily measure this by plugging in a 1000-1500 watt space heater and noting the voltage drop. I do this when I look at buying a new house... | |
| Autoformer vs Speaker impedance Curve bdp24 Thanks for citing those replies. I hope I have covered all if it but new questions are welcome. Several posters think a autoformer is evidence of a bad amplifier design. I don't think that at all though we have to be aware how a particular ... | |
| Autoformer vs Speaker impedance Curve atmasphere. It could also be the power cord, as a cord that limited the amplifier's ability to replenish its power supplies might come off with more distortion as well. This effect is quite measurable- I've seen power cords rob a tube amp of nea... | |
| Autoformer vs Speaker impedance Curve This is an interesting article. http://www.dissident-audio.com/Loudspeakers/CriticalLSDamping.pdfI like what he is doing in figures 2 and 5. However this is just about the woofer. There is no consideration to speakers that have a wide impedance... | |
| Solid State vs. Tubes - What if Transistors came first? Google NuTube. Looks like things are still evolving. "It was developed by Korg, the musical instrument maker, and Noritake, a manufacturer of vacuum fluorescent displays, in Japan" from the internet. I would say this is just a gimic product. It is... | |
| I hate biasing! bifwynne,Just yesterday I read the Stereophile review of the REF 160. See John Atkinsons measurements and comments. The cost is high at $30 K but two amps are always more expensive. Lots of power though. | |
| Autoformers, The Benefits in matching amp to speaker Then I somehow learned that Roger would perform "triode mods" on the RM-9. This consisted on adding a switch for each output tube socket, permitting it to be switched to triode at the cost of 1/2 power. I had this done, switched all those socket... | |
| MAC Autoformers? The KT-150 spec sheet you showed us says that "Tube impedance is [f]rom 10.0KOhm to 12.5KOhm. And is even higher at low currents where we are often listening. It really helps for someone get a scope or some kind of monitoring device to see t... | |
| MAC Autoformers? BIF, I thought you said before that if the primary impedance presented to the output tubes off the output tranny is less than the plate impedance, it can cause distortion and shorten tube life. Ergo, use the 4 ohm tap. You called it light loading.... | |
| Autoformers, The Benefits in matching amp to speaker I might eventually pick up an RM-10 for my Quad ESL's, the best amp in the world for that speaker. Thanks for the compliment. The RM-10 is perfect for the Quads and you don't need the voltage limiter boards because it puts out just the right vo... | |
| MAC Autoformers? Also, Anthony echoed that even if the 4 ohm taps presents an impedance to the output tubes off the primary coil of the output tranny that is higher than the rated 3000 ohms output impedance of the tubes, no harm will occur. Lets get clear abo... | |
| MAC Autoformers? I agree that output impedance is important, but if you wind up using too little feedback to get there, it can be detrimental to the sound thru the process of bifurcation.What is bifurcation in feedback? There's a range of sorts- 8-15 db or so ... | |
| MAC Autoformers? @bifwynneRoger has one of the best tube matching services in the country. I suspect that one reason you have issues with the taps is that the ARC amp really needs a few more db of feedback; 15 db is slightly on the low side to get right. Thanks f... |