Schu Posted January 13, 2019 Share Posted January 13, 2019 I might take a flyer on these 2a3 mono amps... Critique them for me. Parts seem bargan basement. amps use 2pcs 2A3 power tube ( push pull),1pc EF86 ( in triode connection),1pc ECC82 +1pc GZ32 rectifier.gives out up to 15W output (@ 0.6% THD) Quote Link to comment Share on other sites More sharing options...
joessportster Posted January 13, 2019 Share Posted January 13, 2019 China ? Design / layout looks like possible noise issues. I dont like tubes so close together and between transformers Quote Link to comment Share on other sites More sharing options...
tube fanatic Posted January 13, 2019 Share Posted January 13, 2019 The layout looks fine. There is nothing wrong with the Sprague electrolytic cap. Lots more info is needed in order to advise you. Maynard 1 Quote Link to comment Share on other sites More sharing options...
Marvel Posted January 13, 2019 Share Posted January 13, 2019 I would like more info too. Maynard, can you tell from the pics if those are parallel or PP? @joessportster Have you inside the Dennis Had Inspire amps? Everyone says the are very quiet but they look like a bowl of spaghetti to me. Bruce Quote Link to comment Share on other sites More sharing options...
joessportster Posted January 13, 2019 Share Posted January 13, 2019 1 hour ago, Marvel said: I would like more info too. Maynard, can you tell from the pics if those are parallel or PP? @joessportster Have you inside the Dennis Had Inspire amps? Everyone says the are very quiet but they look like a bowl of spaghetti to me. Bruce No not seen inside inspire, I was referring to layout meaning having the tubes between the transformers not how the wiring was done that actually looks nice and neat. On most decent amps you dont find power tubes parked between transformers. As power supplies are routinely called a source of noise I (admittedly) assume these have a higher chance of being noisy especially on high efficiency speakers. I certainly bow to Maynards expertise Quote Link to comment Share on other sites More sharing options...
richieb Posted January 13, 2019 Share Posted January 13, 2019 1 hour ago, Marvel said: I would like more info too. Maynard, can you tell from the pics if those are parallel or PP? @joessportster Have you inside the Dennis Had Inspire amps? Everyone says the are very quiet but they look like a bowl of spaghetti to me. Bruce === I make more noise slurping spaghetti than my Inspire ever thought of making. Quiet as a church mouse —. But alas, pretty much sits idle these days — Quote Link to comment Share on other sites More sharing options...
Schu Posted January 13, 2019 Author Share Posted January 13, 2019 The hotrod... Quote Link to comment Share on other sites More sharing options...
Schu Posted January 13, 2019 Author Share Posted January 13, 2019 ... Quote Link to comment Share on other sites More sharing options...
Schu Posted January 13, 2019 Author Share Posted January 13, 2019 6 hours ago, tube fanatic said: The layout looks fine. There is nothing wrong with the Sprague electrolytic cap. Lots more info is needed in order to advise you. Maynard Any recommendations on a 2a3? Quote Link to comment Share on other sites More sharing options...
ssh Posted January 13, 2019 Share Posted January 13, 2019 Look at the thread of Matt's build of Henry Scott Yocum's 2A3. SSH 2 Quote Link to comment Share on other sites More sharing options...
NOSValves Posted January 13, 2019 Share Posted January 13, 2019 I have to agree with Maynard 🤔 not enough information. The picture shows no sign of low quality to me. The thing that bugs me is if you study the position of the tubes in the top picture to the sockets in under the chassis photo I don't believe the pictures are of same amp. Quote Link to comment Share on other sites More sharing options...
seti Posted January 13, 2019 Share Posted January 13, 2019 47 minutes ago, NOSValves said: I have to agree with Maynard 🤔 not enough information. The picture shows no sign of low quality to me. The thing that bugs me is if you study the position of the tubes in the top picture to the sockets in under the chassis photo I don't believe the pictures are of same amp. Good eyes! Chassis looks like it could be a landfall. Quote Link to comment Share on other sites More sharing options...
Marvel Posted January 14, 2019 Share Posted January 14, 2019 4 hours ago, NOSValves said: The thing that bugs me is if you study the position of the tubes in the top picture to the sockets in under the chassis photo I don't believe the pictures are of same amp. Definitely different pics... Quote Link to comment Share on other sites More sharing options...
ToolShedAmps Posted January 14, 2019 Share Posted January 14, 2019 7 hours ago, Schu said: Any recommendations on a 2a3? Check this out.... no tube sockets sandwiched between transformers.... also, new development, now available with Magnequest output transformers..... 2 Quote Link to comment Share on other sites More sharing options...
Schu Posted January 14, 2019 Author Share Posted January 14, 2019 I want to try an 2a3... not sure I want to spend 4000-5000$ on my first unit. You build exquisite pieces matt, that would be all end all amp... I want to get my feet wet. 1 Quote Link to comment Share on other sites More sharing options...
Marvel Posted January 14, 2019 Share Posted January 14, 2019 11 hours ago, ToolShedAmps said: Check this out.... no tube sockets sandwiched between transformers.... also, new development, now available with Magnequest output transformers..... Nice, can't wait to see more. My Welborne Labs Moondog 2A3 amps use Magnequest trannies. Really good for the bottom end. Bruce 3 Quote Link to comment Share on other sites More sharing options...
ToolShedAmps Posted January 14, 2019 Share Posted January 14, 2019 1 hour ago, Marvel said: Nice, can't wait to see more. My Welborne Labs Moondog 2A3 amps use Magnequest trannies. Really good for the bottom end. Bruce Wow! NICE, GZ37's! Give my friend George a call @ www.tubesusa.com/ELtubes.html for a pair of EML Mesh-2a3's Quote Link to comment Share on other sites More sharing options...
NOSValves Posted January 14, 2019 Share Posted January 14, 2019 13 hours ago, ToolShedAmps said: Check this out.... no tube sockets sandwiched between transformers.... also, new development, now available with Magnequest output transformers..... Mike is a true artisan when it comes to winding transformers. I've dealt with him a number of times off and on for almost 20 years now. He always delivers top quality! 3 Quote Link to comment Share on other sites More sharing options...
ToolShedAmps Posted January 14, 2019 Share Posted January 14, 2019 1 minute ago, NOSValves said: Mike is a true artisan when it comes to winding transformers. I've dealt with him a number of times off and on for almost 20 years now. He always delivers top quality! Agreed! His build-quality is second to none, I've got a couple pair to get started.... Check this out, solid brass channel frames! Absolutely massive! I'm so excited and feel honored to be given the opportunity to use his transformers in my Euphoria 2a3/45 amplifier. 1 Quote Link to comment Share on other sites More sharing options...
rplace Posted January 14, 2019 Share Posted January 14, 2019 Can't offer up any help on the particular amp, but I've been thinking about a new pair of 2A3 tubes for my amps. What does everyone like and why? Gimme the price no option must have and a down to earth options. Quote Link to comment Share on other sites More sharing options...
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