bombaywalla
Responses from bombaywalla
| CAT Ultimate/Tube rolling one more data point, guys & gals, if anyone is reading this out there:i just tried the combination of an Amperex 7308,white label, USN-CEP, made in USA in position V6, V7 & a pair of Ei12AX7 in position V8, V9. Executive summary: simply ex... | |
| Music Hall MMF-5: laid back sound? here's what I had to say about it just in case you missed reading this review here on Audiogon:http://forum.audiogon.com/cgi-bin/frr.pl?ranlg&1033946970&read&3&4&>>and have the table leveled on a granite platform which is... | |
| CAT Ultimate/Tube rolling Hi All,Heard the Mullard 12AX7 tube last night & wanted to share the experience:-The Mullard was placed in position V8 & V9 (like the other 2 12AX7 tubes provided), which is the line-stage section for those familiar with this preamp.* high... | |
| CAT Ultimate/Tube rolling Hi John,no word yet on the Mullard. Listened to the Ei12AX7 last night again - gave it a 2nd chance, so to say. A little better. I think that I haven't heard what this tube is capable of until I think that it reaches 75 hrs. That's too many more h... | |
| CAT Ultimate/Tube rolling true, C123666. however, even w/ NOS the skeptic in me does not expect 100% life owing to the fact that these tubes are 30-40 yrs old & the vacuum is probably compromised some. If i get full life from them, i'm very happy & it's like icing ... | |
| CAT Ultimate/Tube rolling Andrew,the CAT Sig Mk1 USED to be hard on tubes. Back then Ken Stevens used 12AU7 instead of the 6922. Then came along the Sig Mk2 wherein the internal cktry was changed & the 12AU7 was thrown out & replaced with a 6922. Ever since that re... | |
| CAT Preamps vs Amps Hi All, I posted my findings plugging in the 12AX7 tubes that Jafox kindly sent me. I posted this in a more relevant forum. Here's the link http://forum.audiogon.com/cgi-bin/fr.pl?aamps&986396504&openfrom&1&4if anyone is interested... | |
| Historical look at amps agree, Herman, time to exit this thread.Ar_t has been very helpful in revealing the dark secrets of amp design. I don't know if this "So why do you feel threatened when I tell the dark secrets of the world of amp design." was directed at me of Mur... | |
| CAT Ultimate/Tube rolling This is a real old thread but I thought that I'd revive it 'cuz I've been tube rolling some in my CAT SL1 Sig Mk3.Audiogon member Jafox was mighty generous & sent me 3 pairs of 12AX7 tubes - Telefunken, Ei & Mullard.Additionally, I bought ... | |
| Historical look at amps Hey Ar_t,I cut & paste an exerpt from your earlier post:-"The crux: "current-feedback" amps have a bandwidth that remains constant, regardless of gain. Traditional feedback amps do not: as the gain increases, their bandwidth goes down."This do... | |
| Historical look at amps Muralman1,i'm afraid that I'm unable to make any concrete comments on class-D amps. i've not heard one yet. | |
| Historical look at amps i, too, thank Ar_t for his candid & informative posts. Such info sharing has been a long time coming (we got a lot of this in the speaker forum from Roy Johnson when one member 'innocently' asked what the diff between time & phase coherenc... | |
| Historical look at amps Just one comment re. Ar_t's prev post:"You say that you don't want feedback there.......ok......here are your options:Take the resistor out. Connect the emitter to ground. Great, now you have something that won't bias on in a linear manner. You ha... | |
| Historical look at amps Keis,Thanks for posting the response from Charlie Hansen. His mostly detailed post does clarify his intentions & it is exactly what I envisioned his circuits to be - use mostly or only local negative feedback.He is correct in writing that ther... | |
| Historical look at amps Ar_t,I see that you are being extremely difficult on a simple matter like this! I note an extreme resistance on your part to openly cite your affiliation w/ your company thinking that somehow by revealing it we are going to jump on you. For such a... |