DQ828 Posted December 28, 2019 Share Posted December 28, 2019 (edited) 18 hours ago, TMM said: Drummed up enough motivation to continue work on some bent lamination cabinets (5 of them; two towers, a centre and two bookshelves) that have been sitting untouched for at least a year. The last done to them was finishing gluing the sides, so now the overhangs need to be trimmed flush. First I needed to make a bigger DIY router table Then made a heck of a lot of dust machining the front and rear overhang of the laminations Still plenty of work to do, maybe I'll be finished by 2021... Well done great work Edited December 28, 2019 by DQ828 1 Link to comment Share on other sites More sharing options...
mwhouston Posted December 30, 2019 Share Posted December 30, 2019 Just finished a couple of high power SS amps but have had this project in mind for a while. 192W tranni and two 150W Class D Tripath T3 amp modules. usually I have caps on hand but have found 4700uf at 50V better caps at Altronics. I figure four of these for a single rail DC supply to supply both should work. Amp should produce 100W. The whole core of the project is a very low profile 100W power amp. Time to breakout the drill press yet again. 1 Link to comment Share on other sites More sharing options...
aussievintage Posted December 30, 2019 Share Posted December 30, 2019 1 hour ago, mwhouston said: 150W Class D Tripath T3 amp modules I really like the idea. of these super cheap modules. I have found Tripath amps sound quite respectable. I still wonder how they'd stack up against these hypes/purifi newcomers 1 Link to comment Share on other sites More sharing options...
mwhouston Posted December 30, 2019 Share Posted December 30, 2019 2 hours ago, mwhouston said: Just finished a couple of high power SS amps but have had this project in mind for a while. 192W tranni and two 150W Class D Tripath T3 amp modules. usually I have caps on hand but have found 4700uf at 50V better caps at Altronics. I figure four of these for a single rail DC supply to supply both should work. Amp should produce 100W. The whole core of the project is a very low profile 100W power amp. Time to breakout the drill press yet again. Good start. Got all this drilled and mounted. Tomorrow drill out the rear panel for RCAs and speaker binding posts. As with all my power amps a RFI/EMI power filter to be installed. Still thinking of making it an integrated amp with Pass B1 front end. I have four matched FETs ready to go and all other parts. Back to the drill tomorrow, 1 Link to comment Share on other sites More sharing options...
Conesy Posted December 31, 2019 Share Posted December 31, 2019 I am envious of all the DIY here. Some superb projects to get lost in 1 Link to comment Share on other sites More sharing options...
mwhouston Posted December 31, 2019 Share Posted December 31, 2019 Got the caps I wanted from Altronics. Spent a big day on this so far. 1 Link to comment Share on other sites More sharing options...
DQ828 Posted December 31, 2019 Share Posted December 31, 2019 Whats the thingyamajig to the left of the transformer? How do the Holton amps sound? Link to comment Share on other sites More sharing options...
Guest Muon N' Posted December 31, 2019 Share Posted December 31, 2019 Looks like a mains noise suppressor. Link to comment Share on other sites More sharing options...
mwhouston Posted December 31, 2019 Share Posted December 31, 2019 8 hours ago, DQ828 said: Whats the thingyamajig to the left of the transformer? How do the Holton amps sound? Holton amps are phenomenal. Best amps I have ever built. The thingame is a mains power filter. 1 Link to comment Share on other sites More sharing options...
mwhouston Posted December 31, 2019 Share Posted December 31, 2019 5 hours ago, Muon N' said: Looks like a mains noise suppressor. Correct. Link to comment Share on other sites More sharing options...
RankStranger Posted January 1, 2020 Share Posted January 1, 2020 Some good progress on the bracing today. Lots of 100mm holes to drill tomorrow. They take ages. Don’t mind the little bit of corrective surgery. Let’s just say, sometimes it’s a real shame when something you’ve spent time and effort on won’t be visible in the final product. Other times it’s really bloody not. 1 Link to comment Share on other sites More sharing options...
DQ828 Posted January 1, 2020 Share Posted January 1, 2020 (edited) 13 hours ago, mwhouston said: Holton amps are phenomenal. Best amps I have ever built. The thingame is a mains power filter. Can you please give me details of the filter. I have 2 x 3 channel Holton amps modules running my OB's but they have been around a while, they sound good. If I had the money to spare I would have another go with the newer models and more PS caps. Probably just copy what you did Looked good to me. I'd also like to try the solid state speaker protection. Just dreaming. Thats the problem with active crossovers, you need to many amps! Jaycar right? Edited January 1, 2020 by DQ828 1 Link to comment Share on other sites More sharing options...
mwhouston Posted January 1, 2020 Share Posted January 1, 2020 6 minutes ago, DQ828 said: Can you please give me details of the filter. I have 2 x 3 channel Holton amps modules running my OB's but they have been around a while, they sound good. If I had the money to spare I would have another go with the newer models and more PS caps. Probably just copy what you did Looked good to me. I'd also like to try the solid state speaker protection. Just dreaming. Thats the problem with active crossovers, you need to many amps! Jaycar right? https://www.jaycar.com.au/240v-ac-emi-filter/p/MS4001 Link to comment Share on other sites More sharing options...
DQ828 Posted January 1, 2020 Share Posted January 1, 2020 Thank you 1 Link to comment Share on other sites More sharing options...
planet10 Posted January 1, 2020 Share Posted January 1, 2020 8 hours ago, RankStranger said: Some good progress on the bracing today. Are those braces symmetrical/evenly spaced?Best if not exactly. dave 1 Link to comment Share on other sites More sharing options...
RankStranger Posted January 1, 2020 Share Posted January 1, 2020 2 hours ago, planet10 said: Are those braces symmetrical/evenly spaced?Best if not exactly. dave Nope. They’re 137mm, 150mm and 141mm spans across and all different vertically too 1 Link to comment Share on other sites More sharing options...
gonefishing999 Posted January 3, 2020 Share Posted January 3, 2020 On 01/01/2020 at 9:19 PM, RankStranger said: Some good progress on the bracing today. Lots of 100mm holes to drill tomorrow. They take ages. You should buy a 100mm tungsten hole saw "Stanley" at Bunny rabbits. You will never use a saw tooth again ,tungsten will cut though like butter no more burn marks ,they can cut holes in concrete and brick old hardwood studs ,bearers. Peter Link to comment Share on other sites More sharing options...
mwhouston Posted January 3, 2020 Share Posted January 3, 2020 This class d slimline build has been on my mind for a while. I made monoblocks with the same Tripath T3 modules some years back. The monoblocks have since sold. The Mola Mola Bruno amps got me thinking about my own monoblocks - “Tutu”. Devailet amps are a total revolution. But are extremely expensive. Not just that I’m only allowed DIY gear in my house. I thought I could do a super slimline class d. Modules are the hifimediy Tripath T3s. 150W mono modules. I want two low profile Trannis in the 1U enclosure but as you can see there is no way they would fit. With the current Tranni the amp should produce better than 100Wpc. More than enough. There is an inline fuse, RFI/EMI power filter, two 150W class d Tripath modules. Best fit was 4 X 4700uf 50V high temp filter caps. Chassis is earthed and all 240V connections insulated. Worked at first turn on and plays extremely well. Bass is very good. A little crisper than my Holton amps but possibly more detail. Very nice. So another one done. Good start to 2020. 3 Link to comment Share on other sites More sharing options...
RankStranger Posted January 3, 2020 Share Posted January 3, 2020 6 minutes ago, gonefishing999 said: You should buy a 100mm tungsten hole saw "Stanley" at Bunny rabbits. You will never use a saw tooth again ,tungsten will cut though like butter no more burn marks ,they can cut holes in concrete and brick old hardwood studs ,bearers. Peter Thanks, Peter. I’ll check them out Link to comment Share on other sites More sharing options...
aussievintage Posted January 3, 2020 Share Posted January 3, 2020 38 minutes ago, mwhouston said: This class d slimline build has been on my mind for a while. I made monoblocks with the same Tripath T3 modules some years back. The monoblocks have since sold. The Mola Mola Bruno amps got me thinking about my own monoblocks - “Tutu”. Devailet amps are a total revolution. But are extremely expensive. Not just that I’m only allowed DIY gear in my house. I thought I could do a super slimline class d. Modules are the hifimediy Tripath T3s. 150W mono modules. I want two low profile Trannis in the 1U enclosure but as you can see there is no way they would fit. With the current Tranni the amp should produce better than 100Wpc. More than enough. There is an inline fuse, RFI/EMI power filter, two 150W class d Tripath modules. Best fit was 4 X 4700uf 50V high temp filter caps. Chassis is earthed and all 240V connections insulated. Worked at first turn on and plays extremely well. Bass is very good. A little crisper than my Holton amps but possibly more detail. Very nice. So another one done. Good start to 2020. Bloody good start ! 2 Link to comment Share on other sites More sharing options...
mwhouston Posted January 5, 2020 Share Posted January 5, 2020 (edited) I stumbled across these images from 2014 of 6EM7 monoblocks I built after building a few 6EM7 amps. The 6EM7 has two triodes in the one glass. You have driver and power triode in the one bottle. Inspired by the Decware 2W triodes I went for the monoblocks. Each block has its own double Pi choked PS tranni and 5Y3 rec tube and own RFI/EMI power filter. Any similar rec tube could be used. The chassis are Jaycar cast Al sprayed with epoxy enamel paint. A tail with a IEC socket allows any power cord to be used. Power tranni and choke is Hammond and OPTs Edcor. These sold after I had had then for a while and the purchaser still swaps them in when listen to voice based music. At only 2W efficient speakers are required. I tried to buy them back but he liked them to much to release them. Wished Id kept them. Edited January 5, 2020 by mwhouston 2 Link to comment Share on other sites More sharing options...
mwhouston Posted January 6, 2020 Share Posted January 6, 2020 (edited) If anyone wants more detail about my tube amp above. http://retro-thermionic.blogspot.com/2012/02/paris-duo-6em7-monoblock-power.html Edited January 6, 2020 by mwhouston Link to comment Share on other sites More sharing options...
marten Posted January 6, 2020 Share Posted January 6, 2020 On 03/01/2020 at 1:08 PM, gonefishing999 said: You should buy a 100mm tungsten hole saw "Stanley" at Bunny rabbits. Peter Peter, just to clarify - are you saying here the tungsten hole saw works well to cut MDF and plywood, or hard stuff life bricks and bearers? Link to comment Share on other sites More sharing options...
BioBrian Posted January 6, 2020 Share Posted January 6, 2020 36 minutes ago, marten said: the tungsten hole saw works well to cut MDF and plywood Just my 2-bobs-worth: - The yellow ones with 3 tungsten teeth cut plywood very fast and reasonably cleanly (especially if rounding over edges later with router bit). One quick cut - very satisfying. - The blue ones with many small teeth are not good for this job. They cut a very clean, accurate circle, but you can only penetrate about 2 mm before having to back off, stop, and clean out the teeth before going again - I find this very frustrating. Both require you to buy the cutter (many options on diameter), but also a matching centre drill part. I have a "vertical drill" to do this - not sure I'd recommend using 100 mm or larger cutter with a hand-held drill. 1 Link to comment Share on other sites More sharing options...
aussievintage Posted January 6, 2020 Share Posted January 6, 2020 My adventures in cutting holes too big for drills, has mostly been cutting holes for valve sockets. NOTHING beats a hole punch, even for thin ply and plastic, but especially metal. 1 Link to comment Share on other sites More sharing options...
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