henry4841 Posted June 9, 2023 Author Share Posted June 9, 2023 2 hours ago, Shakeydeal said: This just in…… Nice, good to see you with an amplifier you have been looking for. Quote Link to comment Share on other sites More sharing options...
Shakeydeal Posted June 9, 2023 Share Posted June 9, 2023 12 minutes ago, henry4841 said: Nice, good to see you with an amplifier you have been looking for. Well it’s not the one I was looking for, i.e., the one I paid a certain unnamed person for, but it’s very good. 1 Quote Link to comment Share on other sites More sharing options...
jcn3 Posted June 13, 2023 Share Posted June 13, 2023 On 6/9/2023 at 4:39 PM, Shakeydeal said: This just in…… an el84-based amp? for a second system or to rotate in with the 300b monoblocks? very nice . . . . Quote Link to comment Share on other sites More sharing options...
Shakeydeal Posted June 13, 2023 Share Posted June 13, 2023 1 minute ago, jcn3 said: an el84-based amp? for a second system or to rotate in with the 300b monoblocks? very nice . . . . I don't have 300B monoblocks. But yes, this is for the main system. Quote Link to comment Share on other sites More sharing options...
jcn3 Posted June 13, 2023 Share Posted June 13, 2023 Just now, Shakeydeal said: I don't have 300B monoblocks. But yes, this is for the main system. i saw the SET monoblocks in your signature -- just assumed 300b amp -- my bad. so the new amp is to use with your la scalas? i thought you really liked the amp you have. Quote Link to comment Share on other sites More sharing options...
jjptkd Posted June 13, 2023 Share Posted June 13, 2023 1 minute ago, jcn3 said: so the new amp is to use with your la scalas? i thought you really liked the amp you have. I believe this is the fourth or fifth change since I've been paying attention all part of the fun I suppose I finally found my destination amplifiers in the Carver mono-blocks they just do everything perfect cannot imagine anything sounding better at least for the price I paid only reason I'd get rid of these would be to down-size if I ever have to. Quote Link to comment Share on other sites More sharing options...
Shakeydeal Posted June 13, 2023 Share Posted June 13, 2023 I like them both. But the EL84 output tube seems better suited to the lascalas. Quote Link to comment Share on other sites More sharing options...
jcn3 Posted June 13, 2023 Share Posted June 13, 2023 58 minutes ago, Shakeydeal said: I like them both. But the EL84 output tube seems better suited to the lascalas. i like the sound of el84 tubes, too -- very full sound and a surprising amount of bass from a skinny little tube! 2 Quote Link to comment Share on other sites More sharing options...
Shakeydeal Posted June 13, 2023 Share Posted June 13, 2023 1 minute ago, jcn3 said: i like the sound of el84 tubes, too -- very full sound and a surprising amount of bass from a skinny little tube! I had a Music Reference RM10 which I foolishly sold. But to my surprise, this Aric EL84 beats it hands down. 1 Quote Link to comment Share on other sites More sharing options...
jcn3 Posted June 14, 2023 Share Posted June 14, 2023 not sure if i've posted this, so will do at the risk of repeating . . . 7 Quote Link to comment Share on other sites More sharing options...
CCG Posted June 21, 2023 Share Posted June 21, 2023 On 6/14/2023 at 11:34 AM, jcn3 said: not sure if i've posted this, so will do at the risk of repeating . . . Congrats. Looks very neat. 1 Quote Link to comment Share on other sites More sharing options...
Limberpine Posted July 3, 2023 Share Posted July 3, 2023 On 8/15/2021 at 8:00 AM, Schu said: certainly there are very few on the used market... they rarely come up. these just look so beautiful... I worry about the loss of LF range on a 2A3 design though. What are these? Quote Link to comment Share on other sites More sharing options...
Turnip Posted July 6, 2023 Share Posted July 6, 2023 Snapped this night time shot of my Icon Audio Stereo 40 Mk IV. I run it in Triode mode with Low Feedback 4 1 Quote Link to comment Share on other sites More sharing options...
capo72 Posted July 7, 2023 Share Posted July 7, 2023 20 hours ago, Turnip said: Snapped this night time shot of my Icon Audio Stereo 40 Mk IV. I run it in Triode mode with Low Feedback Icon Audio makes beautiful equipment! I would love to try their tube phono stage. 1 Quote Link to comment Share on other sites More sharing options...
Turnip Posted July 7, 2023 Share Posted July 7, 2023 2 hours ago, capo72 said: Icon Audio makes beautiful equipment! I would love to try their tube phono stage. I agree. I really like the copper plate tops on their chassis. So far, I have been very happy with the 40 Mk IV. The headphone output on it is outstanding too, so at least I'm not tempted by their headphone amps. I emailed some questions to Icon and I promptly received a reply from David Shaw himself. 1 Quote Link to comment Share on other sites More sharing options...
seti Posted July 12, 2023 Share Posted July 12, 2023 My friend and I finished another pair of amplifiers. These were a real mission. I spent so much time on these. They are supposed to be 90wpc which they are but they clip like crazy. They are super clean up to 75wpc. 2 x 5ar4, 2x od3, 2 x 6sn7, 2 x kt90..... There was a 12au7 preamp stage but we ripped it out. We add JJ and Hayseed caps and also two test points and pots for setting bias. They are still pretty much Allen 90 organ amps but with a beefed-up power supply. 6 Quote Link to comment Share on other sites More sharing options...
Scott Grammer Posted July 30, 2023 Share Posted July 30, 2023 (edited) In the past, I have built and re-built a number of tube amps, but these two are the ones I currently own. The first two pictures are of an amp built on the chassis and iron of one of the cheap Chinese amps sold on Amazon and FleaBay. I acquired one of these third hand, and like its previous two owners, I was not in love with the sound of it. You can see what I did to it by checking out my YouTube series about it here: https://www.youtube.com/playlist?list=PLUD-UYYvvR59Mrh2ON8Qpkb0aJceN3OL8. (Dear moderators: If I have erred in placing this link, please forgive me, I'm new here.) The second two pictures are of what I have always termed the "baby amp." It's a 2.5WPC, all-triode, class-A, single-ended amp with no negative feedback and about as simple a schematic as possible. It uses a 5AR4 rectifier, a 6SL7G voltage amp, and a 6AS7GT output tube. It has very little gain, but it sounds really good with my Cornwalls, possible due to the very low plate impedance of the output tube. I built it in 1995, and it has not been changed since, save for replacing the original output tube which sadly went to air sometime in the past. For a sense of scale, the width of the chassis is only 10 inches (25.4cm). Edited July 30, 2023 by Scott Grammer Typo! 5 Quote Link to comment Share on other sites More sharing options...
henry4841 Posted July 30, 2023 Author Share Posted July 30, 2023 Thanks for posting pictures. Nice to have another tube electronic geek ,tech, on this forum. I've built a couple of those Chinese kits and was well pleased with the sound for what they cost. What surprised me most on those kits was the iron, not bad at all. Quote Link to comment Share on other sites More sharing options...
Scott Grammer Posted July 30, 2023 Share Posted July 30, 2023 7 minutes ago, henry4841 said: Thanks for posting pictures. Nice to have another tube electronic geek ,tech, on this forum. I've built a couple of those Chinese kits and was well pleased with the sound for what they cost. What surprised me most on those kits was the iron, not bad at all. Yeah, the OPT's surprised me with their sound, although their measurements are a bit wacky. The 4-ohm tap is not at 4 ohms, more like 3, and the HF is lacking. With no NFB, it begins rolling off at 13KHz. But the bass was stellar. Flat down to around 10Hz! I imagine the primary has a great deal of inductance, which would explain both the lossy highs and the excellent bass. This one was not a kit, it was prebuilt. They had the primary of the OPT's wired backwards, so the ultralinear tap was at the wrong percentage of the winding. And the suppressor grids of the EL34's were not connected to anything! Just left floating in space. Finally, with an 8-ohm load on the 8-ohm secondary connection, the primaries are the wrong impedance for EL34's, actually better matched to 6L6's. I'm currently running 6L6's in that amp, and they sound pretty good with mt Cornwalls - better than the EL34's in the picture. 1 Quote Link to comment Share on other sites More sharing options...
chronometers Posted September 6, 2023 Share Posted September 6, 2023 On 9/6/2020 at 1:36 PM, Schu said: lol Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.