September 3, 200818 yr comment_157143 hm.. so, I'm not getting an overwhelming response "go try this, no one has done it". It would definitely be the road less traveled. Well, the thing is you'd like to use the TVC between the preamp and amp and have it do the SE to balance conversion as well. TVCs are generally optimized for lower signal levels such as what you'd find coming out of a CD player, your planned application is not what they're made for. What you could do is stick a TVC/AVC on the input of the preamp and then use another transformer on its output to do the SE/balanced conversion. That way both transformers run the way they're meant to and you don't have saturation or overload problems. Unfortunately the costs go up a fair bit, good transformers ain't cheap. Report
September 3, 200818 yr Author comment_157154 What you could do is stick a TVC/AVC on the input of the preamp and then use another transformer on its output to do the SE/balanced conversion. That way both transformers run the way they're meant to and you don't have saturation or overload problems. Unfortunately the costs go up a fair bit, good transformers ain't cheap. yeah, this is what Sowter recommended I do with the second transformer for conversion. I think the key is to avoid Permalloy / mu-metal and thus allow higher voltages. I'm talking with 2 people about custom units from either grain oriented steel or a 50% Permalloy solution. They are saying that I can get maximum input voltage up to around 25 VAC this way. The other option would be an air-gapped core, but that will reduce inductance by a factor and make the unit less suitable for volume control. Now the question is how much DC these custom units can handle (since I'm moving away from Permalloy) and if I can use them to replace the coupling caps as well... stay tuned! Report
September 30, 200817 yr Author comment_165022 Just paid for the Promitheus Audio TVC! hm.. still waiting... Report
September 30, 200817 yr comment_165029 hm.. still waiting... What's the ETA? I've always wanted to try it out (Promitheus TVC) but I want remote with my preamp. Report
October 1, 200817 yr Author comment_165032 What's the ETA? I've always wanted to try it out (Promitheus TVC) but I want remote with my preamp. dunno... he's MIA (Mikhail in Action) at the moment... remote would be possible, I'll have one Report
October 1, 200817 yr comment_165039 remote would be possible, I'll have one Didn't realize that was even an option. Report
October 1, 200817 yr Author comment_165057 Didn't realize that was even an option. well, everything is an option for DIY, right? =) Report
October 3, 200817 yr Author comment_165712 That's not encouraging. I'm happy waiting (even without communication), but is there some sort of cut-off point for trying to pursue a refund via PayPal? Report
October 3, 200817 yr comment_165715 I'm happy waiting (even without communication), but is there some sort of cut-off point for trying to pursue a refund via PayPal? IIRC 45 days, but you should verify that. And recovery only works if the funds are still available in the receivers account. Report
August 17, 200917 yr comment_267089 Anyone buy a TVC from Promitheus Audio recently? Or any ideas if the wait times are still long with little communication? Thinking about trying a TVC and the basic SE should suit my needs nicely. Report
August 17, 200917 yr Author comment_267140 Anyone buy a TVC from Promitheus Audio recently? Or any ideas if the wait times are still long with little communication? Thinking about trying a TVC and the basic SE should suit my needs nicely. yeah, that would be my concern as well. No way to really know. I'd probably check AudioCircle (I think?) as Nick has a forum there, or look to buy used. Report
August 17, 200917 yr comment_267185 yeah, that would be my concern as well. No way to really know. I'd probably check AudioCircle (I think?) as Nick has a forum there, or look to buy used. He told me he has two in stock, so I ordered one Report
August 17, 200917 yr Author comment_267195 He told me he has two in stock, so I ordered one cool, when you get it, would you PM me? I have a question about it that requires opening the hood Report
August 17, 200917 yr comment_267199 cool, when you get it, would you PM me? I have a question about it that requires opening the hood Will do. Report
October 9, 200916 yr comment_284053 Hmm... So I've really liked my Promitheus TVC, it did make quite a dramatic difference mainly in detail and resolution coming from a passive preamp. I actually listened to the speaker setup more than the Stax/BH rig after a few weeks with the TVC. So now I'm naturally thinking about an upgrade. I could put together a silver S&B TX102 unit for roughly $1500 (after accounting for case, wiring, etc). Are there any others I should consider? I've emailed Tribute, but no reply yet. I'm also holding out for a copper TX102, but I don't know how easily I'll find one. d'oh sorry about the pics Marc. If you remind me (or I see this thread) when I'm back in NH, I'll get them for you for sure Edited October 9, 200916 yr by deepak Report
October 9, 200916 yr Author comment_284066 d'oh sorry about the pics Marc. If you remind me (or I see this thread) when I'm back in NH, I'll get them for you for sure nah, I'll just guilt you into sending the entire thing down my way I think Intact / Bent Audio has to be high on your list. Report
October 9, 200916 yr comment_284154 I think Intact / Bent Audio has to be high on your list. Yup, Dave Slagle makes pretty awesome AVC's, I prefered his to the the copper S&B unit. Report
October 11, 200916 yr comment_284502 Yep Intact has moved high on the list, very reasonable prices Just waiting to hear from Tribute. Report
November 13, 200916 yr comment_295982 Yep Intact has moved high on the list, very reasonable prices Just waiting to hear from Tribute. It's not gonna be quick mate ,believe me ))) Peter does a great job truly ,but he is responding really slow , as well like supplying orders ,but they are definitely worth to wait for . I always did Report
November 13, 200916 yr comment_295984 even if sometime he ran me out of steam not writing back and keeping open project covered with dust on the table ,due to a lack of OPT's )))) Report
March 25, 201016 yr comment_338469 Would a TVC or AVC have a problem running really long cables to a power amp (I'm thinking about 30-35 feet) with a 2v output source? Report
March 25, 201016 yr comment_338476 It more depends on the nature of your source's output stage. You would want low output impedance and reasonable current. Also depends on your power amp's input impedance. Report
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