aerius Posted September 3, 2008 Report Share Posted September 3, 2008 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. Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted September 3, 2008 Author Report Share Posted September 3, 2008 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! Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted September 5, 2008 Author Report Share Posted September 5, 2008 Just paid for the Promitheus Audio TVC! Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted September 30, 2008 Author Report Share Posted September 30, 2008 Just paid for the Promitheus Audio TVC! hm.. still waiting... Quote Link to comment Share on other sites More sharing options...
Salt Peanuts Posted September 30, 2008 Report Share Posted September 30, 2008 hm.. still waiting... What's the ETA? I've always wanted to try it out (Promitheus TVC) but I want remote with my preamp. Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted October 1, 2008 Author Report Share Posted October 1, 2008 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 Quote Link to comment Share on other sites More sharing options...
Salt Peanuts Posted October 1, 2008 Report Share Posted October 1, 2008 remote would be possible, I'll have one Didn't realize that was even an option. Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted October 1, 2008 Author Report Share Posted October 1, 2008 Didn't realize that was even an option. well, everything is an option for DIY, right? =) Quote Link to comment Share on other sites More sharing options...
n_maher Posted October 1, 2008 Report Share Posted October 1, 2008 hm.. still waiting... That's not encouraging. Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted October 3, 2008 Author Report Share Posted October 3, 2008 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? Quote Link to comment Share on other sites More sharing options...
n_maher Posted October 3, 2008 Report Share Posted October 3, 2008 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. Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted October 7, 2008 Author Report Share Posted October 7, 2008 I just got a DHL tracking number, so..... Quote Link to comment Share on other sites More sharing options...
deepak Posted August 17, 2009 Report Share Posted August 17, 2009 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. Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted August 17, 2009 Author Report Share Posted August 17, 2009 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. Quote Link to comment Share on other sites More sharing options...
deepak Posted August 17, 2009 Report Share Posted August 17, 2009 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 Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted August 17, 2009 Author Report Share Posted August 17, 2009 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 Quote Link to comment Share on other sites More sharing options...
deepak Posted August 17, 2009 Report Share Posted August 17, 2009 cool, when you get it, would you PM me? I have a question about it that requires opening the hood Will do. Quote Link to comment Share on other sites More sharing options...
deepak Posted October 9, 2009 Report Share Posted October 9, 2009 (edited) 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, 2009 by deepak Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted October 9, 2009 Author Report Share Posted October 9, 2009 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. Quote Link to comment Share on other sites More sharing options...
aerius Posted October 9, 2009 Report Share Posted October 9, 2009 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. Quote Link to comment Share on other sites More sharing options...
deepak Posted October 11, 2009 Report Share Posted October 11, 2009 Yep Intact has moved high on the list, very reasonable prices Just waiting to hear from Tribute. Quote Link to comment Share on other sites More sharing options...
gregdee Posted November 13, 2009 Report Share Posted November 13, 2009 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 Quote Link to comment Share on other sites More sharing options...
gregdee Posted November 13, 2009 Report Share Posted November 13, 2009 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 )))) Quote Link to comment Share on other sites More sharing options...
deepak Posted March 25, 2010 Report Share Posted March 25, 2010 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? Quote Link to comment Share on other sites More sharing options...
cetoole Posted March 25, 2010 Report Share Posted March 25, 2010 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. Quote Link to comment Share on other sites More sharing options...
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