Grahame Posted March 9, 2009 Report Share Posted March 9, 2009 wat? the standard BH is 10W bias per tube 10W CCS x4 = 40W 10W EL34 plate x4 = 40W 1.6A x 6.3V x 4 = 40W voltage regulation = +15% transformer efficiency = +15% total = 166W then add in the -300V regulators, a couple watts for the +/-15V, and its easily 175W Does it ship with one of these? Quote Link to comment Share on other sites More sharing options...
spritzer Posted March 9, 2009 Report Share Posted March 9, 2009 80W-90W per channel, obviously It's alright Marc, we all know about your current calculations... Too soon?? Quote Link to comment Share on other sites More sharing options...
Knuckledragger Posted March 9, 2009 Report Share Posted March 9, 2009 Here are a few more pics of the first BHSE burning in: Quote Link to comment Share on other sites More sharing options...
Duggeh Posted March 9, 2009 Report Share Posted March 9, 2009 Took marginally longer for krmathis to repost the pictures onto head-fi than I had bet on in my head. Hello Kai be nice if you chimed in once in a while. Quote Link to comment Share on other sites More sharing options...
mirumu Posted March 9, 2009 Report Share Posted March 9, 2009 That really looks great. I really wish I'd picked up or built a Blue Hawaii a few years back when cash to more fluid for me. I'm sure though that even then I'd be getting a strong urge to upgrade looking at this. Quote Link to comment Share on other sites More sharing options...
Aura Posted March 9, 2009 Report Share Posted March 9, 2009 Hello Kai be nice if you chimed in once in a while. Indeed. Quote Link to comment Share on other sites More sharing options...
hirsch Posted March 9, 2009 Report Share Posted March 9, 2009 As far as I know, for what an amp builder tried to explain to me, if you don't load the secondary of a transformer coupled tube amp, the tube output sees the primary as a load with just the impedance of the wire in the primary, so it's quite close to a short. The tube is asked to delivery way more current than it's designed to and will die soon. So for a short while you can run an OTC tube amp without a load plugged, but it's not a good idea doing so for more than a few minutes, unless you want to burn out your tubes prematurely. For an hybrid amp, if the output devices are the transistors, not having a load plugged shouldn't be a problem. The transistors are still a load that the tubes would "see" despite you don't connect anything to the output. It's a bit more problematical than that. You see, the extra current being drawn from the tubes has to go somewhere. What it does is turn into heat. When enough heat is generated, what appeared to be a near short in the transformer becomes a real short, and an expensive output transformer is now an expensive paperweight. Once a tube is operating into a dead short, it will burn out quickly enough. In some pro gear, there is a short across the output jack when nothing is plugged in, so that the tube is operating into a dead short immediately. The idea is to burn out the tube as quickly as possible, before it can kill the transformer. Tubes are cheap relative to output transformers, in most cases. While this only applies to transformer-coupled amps, I tend to advise people to always put a load on a tube amp. Even if the amp is safe without a load, it creates good habits. Plugging a headphone in when not necessary doesn't hurt anything. Forgetting to plug a headphone into a transformer-coupled amp can be disaster. Better to develop a good habit than learn from an expensive mistake. Quote Link to comment Share on other sites More sharing options...
kevin gilmore Posted March 10, 2009 Report Share Posted March 10, 2009 If you are going to go thru the trouble to put in a 5 pin switching headphone jack, you might as well tie the switched outputs to a proper resistive load instead. Made easy by the neutrik switching jack. Quote Link to comment Share on other sites More sharing options...
Torpedo Posted March 10, 2009 Report Share Posted March 10, 2009 It's a bit more problematical than that. You see, the extra current being drawn from the tubes has to go somewhere. What it does is turn into heat. When enough heat is generated, what appeared to be a near short in the transformer becomes a real short, and an expensive output transformer is now an expensive paperweight. Once a tube is operating into a dead short, it will burn out quickly enough. In some pro gear, there is a short across the output jack when nothing is plugged in, so that the tube is operating into a dead short immediately. The idea is to burn out the tube as quickly as possible, before it can kill the transformer. Tubes are cheap relative to output transformers, in most cases. While this only applies to transformer-coupled amps, I tend to advise people to always put a load on a tube amp. Even if the amp is safe without a load, it creates good habits. Plugging a headphone in when not necessary doesn't hurt anything. Forgetting to plug a headphone into a transformer-coupled amp can be disaster. Better to develop a good habit than learn from an expensive mistake. Yep that's the detailed explanation I was given, but not being a technical person I couldn't remember it. Thanks for clarifying Quote Link to comment Share on other sites More sharing options...
LFF Posted March 10, 2009 Report Share Posted March 10, 2009 Never thought I would see Large Marge in a headphone amp thread. Quote Link to comment Share on other sites More sharing options...
purk Posted March 11, 2009 Report Share Posted March 11, 2009 Very nice work indeed Justin. Very awesome looking amp! Quote Link to comment Share on other sites More sharing options...
Knuckledragger Posted March 11, 2009 Report Share Posted March 11, 2009 Never thought I would see Large Marge in a headphone amp thread. What, you've never seen -=her=- posts? ...I'll get my coat. Quote Link to comment Share on other sites More sharing options...
Asr Posted May 26, 2009 Report Share Posted May 26, 2009 My BHSE should be shipping today. It's going to LA to be displayed at CanJam '09 (on Icarium's Spectral SDR-2000) so hopefully it gets there on time. It'll also be staying in the LA area for a few weeks after CanJam so if any SoCal-ers want to check it out after the big event, let me know. Quote Link to comment Share on other sites More sharing options...
Hopstretch Posted May 26, 2009 Report Share Posted May 26, 2009 My BHSE should be shipping today. It's going to LA to be displayed at CanJam '09 (on Icarium's Spectral SDR-2000) so hopefully it gets there on time. Ooh, I want to hear that combo! Quote Link to comment Share on other sites More sharing options...
justin Posted May 26, 2009 Report Share Posted May 26, 2009 i just shipped it, to be delivered to the hotel along with my demo BHSE, Sony SACD player, and a couple pairs of Stax headphones. Total bill for 3-day shipping = $400 :facepalm: Quote Link to comment Share on other sites More sharing options...
n_maher Posted May 26, 2009 Report Share Posted May 26, 2009 i just shipped it, to be delivered to the hotel along with my demo BHSE, Sony SACD player, and a couple pairs of Stax headphones. Total bill for 3-day shipping = $400 :facepalm: Better than the 2-day bill would have been. Quote Link to comment Share on other sites More sharing options...
Dusty Chalk Posted May 26, 2009 Report Share Posted May 26, 2009 Promotion for an amp that's already sold out: priceless. Quote Link to comment Share on other sites More sharing options...
grawk Posted May 26, 2009 Report Share Posted May 26, 2009 It's not sold out Quote Link to comment Share on other sites More sharing options...
Dusty Chalk Posted May 26, 2009 Report Share Posted May 26, 2009 It's not?!?!? I thought the first run had a waiting list in hopes of people dropping out? Quote Link to comment Share on other sites More sharing options...
Asr Posted May 26, 2009 Report Share Posted May 26, 2009 i just shipped it, to be delivered to the hotel along with my demo BHSE, Sony SACD player, and a couple pairs of Stax headphones. Total bill for 3-day shipping = $400 :facepalm: Where's my e-mail with tracking number?? Also if shipping cost more than what I already paid for, I will gladly pay the difference. You know how to contact me. It's not?!?!? I thought the first run had a waiting list in hopes of people dropping out? IIRC, Justin has a few units that may be available. Quote Link to comment Share on other sites More sharing options...
Hopstretch Posted May 26, 2009 Report Share Posted May 26, 2009 It's not?!?!? I thought the first run had a waiting list in hopes of people dropping out? I heard LobsterDragon has bought out the entire second run. For his hoard. Quote Link to comment Share on other sites More sharing options...
n_maher Posted May 26, 2009 Report Share Posted May 26, 2009 I can't wait to hear this amp again this weekend. Quote Link to comment Share on other sites More sharing options...
Elephas Posted May 26, 2009 Report Share Posted May 26, 2009 i just shipped it, to be delivered to the hotel along with my demo BHSE, Sony SACD player, and a couple pairs of Stax headphones. Total bill for 3-day shipping = $400 :facepalm: Haha, I would've thought a young strong guy could've "carry-on" the Sony SACD player in a backpack. Quote Link to comment Share on other sites More sharing options...
purk Posted May 26, 2009 Report Share Posted May 26, 2009 Haha, I would've thought a young strong guy could've "carry-on" the Sony SACD player in a backpack. It is possible with the XA5400ES, but I don't think Justin will make it with the Sony SCD-1 in a backpack. Quote Link to comment Share on other sites More sharing options...
spritzer Posted May 26, 2009 Report Share Posted May 26, 2009 Hmm, 400$ for two amps plus headphones and a CDP? That's a bargain compared to the highway robbery Fedex are charging for just the amp to Iceland. Quote Link to comment Share on other sites More sharing options...
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