diyAudio http://www.diyaudio.com/forums/gallery Tue, 21 Oct 2014 22:50:48 -0400 PhotoPost Pro 6.02 My Bench (2014) http://www.diyaudio.com/forums/gallery/showphoto.php/photo/10072 <a href="http://www.diyaudio.com/forums/gallery/showphoto.php/photo/10072" target="_blank"><img title="bench.jpg" border="0" src="http://origin.dastatic.com/forums/gallery/data/1437/thumbs/bench.jpg" alt="bench.jpg" /></a><br /><br />by: kevinkr<br /><br />Description: My work bench... To the right of my scope is a small computer with my uTracer V3 on top of it - one of the most useful devices I have built in a while. On top of the scope you can see my Pete Millett Sound Card Interface which I have modified for quieter performance, it is used with an M Audio Audiophile 24192 which IMO does not perform as well as my Audiophile 2496 in the area of SFDR at the higher sample rates. In the middle of the bench sits the PSU for the Muscovite Mini Phono Stage and to the very left is my Amber 5500 and 3501A audio measurement test sets. Not surprisingly the generators in these units are cleaner particularly at low levels than the one in my FFT set up so I tend to use them with the FFT from time to time. I've also got (and you can see) a Keithley 2002, a Fluke 8050 (fresh batteries) and a Fluke 8010 DMM.. An HP frequency counter rounds things out. I also have a wavetek function generator which is in my storage cabinet as I don't have room for it on the bench. kevinkr Sun, 02 Feb 2014 10:49:46 -0500 My Room in 2014 http://www.diyaudio.com/forums/gallery/showphoto.php/photo/10070 <a href="http://www.diyaudio.com/forums/gallery/showphoto.php/photo/10070" target="_blank"><img title="room.jpg" border="0" src="http://origin.dastatic.com/forums/gallery/data/1437/thumbs/room.jpg" alt="room.jpg" /></a><br /><br />by: kevinkr<br /><br />Description: This is what the place looks like now. kevinkr Sat, 01 Feb 2014 21:23:34 -0500 My Room in 2014 http://www.diyaudio.com/forums/gallery/showphoto.php/photo/10071 <a href="http://www.diyaudio.com/forums/gallery/showphoto.php/photo/10071" target="_blank"><img title="room2.jpg" border="0" src="http://origin.dastatic.com/forums/gallery/data/1437/thumbs/room2.jpg" alt="room2.jpg" /></a><br /><br />by: kevinkr<br /><br />Description: This is what the place looks like now. kevinkr Sat, 01 Feb 2014 21:23:34 -0500 My Room in 2014 http://www.diyaudio.com/forums/gallery/showphoto.php/photo/10069 <a href="http://www.diyaudio.com/forums/gallery/showphoto.php/photo/10069" target="_blank"><img title="machineshop1.jpg" border="0" src="http://origin.dastatic.com/forums/gallery/data/1437/thumbs/machineshop1.jpg" alt="machineshop1.jpg" /></a><br /><br />by: kevinkr<br /><br />Description: This is what the place looks like now. kevinkr Sat, 01 Feb 2014 21:23:33 -0500 TD-124/I Supporting Electronics (2014) http://www.diyaudio.com/forums/gallery/showphoto.php/photo/10068 <a href="http://www.diyaudio.com/forums/gallery/showphoto.php/photo/10068" target="_blank"><img title="td124-21.jpg" border="0" src="http://origin.dastatic.com/forums/gallery/data/1437/thumbs/td124-21.jpg" alt="td124-21.jpg" /></a><br /><br />by: kevinkr<br /><br />Description: I'm currently working on the Muscovite Mini phono pre which can be seen directly underneath the TD-124/I along with a multi-tan pre-pre a friend designed, and who happened to build a copy for me. The power supply on the floor is temporary while I wait for a couple of transformers and chokes to arrive for the actual supply which is packaged in the same style enclosure as the pre-amp. kevinkr Sat, 01 Feb 2014 21:12:09 -0500 JBL Top End (Onken System 2014) http://www.diyaudio.com/forums/gallery/showphoto.php/photo/10067 <a href="http://www.diyaudio.com/forums/gallery/showphoto.php/photo/10067" target="_blank"><img title="drivers.jpg" border="0" src="http://origin.dastatic.com/forums/gallery/data/1437/thumbs/drivers.jpg" alt="drivers.jpg" /></a><br /><br />by: kevinkr<br /><br />Description: The midrange horn is a JBL 2440 with OEM 2441 diaphragm installed, the horn is a 2311, and the diffuser (lens) is a Japanese knock off of the 2308. The treble is handled by a 1950s vintage 075 annular ring horn tweeter. (AKA bullets) Both drivers have Alnico magnets. The tweeters appeared to have been in a house fire at some point when I received them, the seller denied this, but I am pretty certain that was the case (baked on soot and discoloration) - they cleaned up pretty well, and the diaphragms are the originals which is good, because the later ones do not sound as good IMHO. The XO is a 3 way 2nd order LR type that I designed and built myself some years ago. kevinkr Sat, 01 Feb 2014 21:03:35 -0500 Equipment Rack (2014) http://www.diyaudio.com/forums/gallery/showphoto.php/photo/10065 <a href="http://www.diyaudio.com/forums/gallery/showphoto.php/photo/10065" target="_blank"><img title="rack.jpg" border="0" src="http://origin.dastatic.com/forums/gallery/data/1437/thumbs/rack.jpg" alt="rack.jpg" /></a><br /><br />by: kevinkr<br /><br />Description: This rack supports a few tuners, my TD-124/II, my Sony SCD-777ES SACD player, 26 DHT line stage, the Muscovite phono pre and Lundahl LL1941 SUTS, as well as the media server and dac. The power supplies for the GM70 power amplifiers and the Muscovite phono pre are located on the floor underneath the rack. The GM70 amps can be seen just to the left of the rack and provide approximately 20W each to the diy Onkens.<br /><br />1 comment kevinkr Sat, 01 Feb 2014 20:49:55 -0500 My Fully Restored TD-124/II (2014) http://www.diyaudio.com/forums/gallery/showphoto.php/photo/10063 <a href="http://www.diyaudio.com/forums/gallery/showphoto.php/photo/10063" target="_blank"><img title="td124-1.jpg" border="0" src="http://origin.dastatic.com/forums/gallery/data/1437/thumbs/td124-1.jpg" alt="td124-1.jpg" /></a><br /><br />by: kevinkr<br /><br />Description: Now installed in a slate plinth, and equipped with a 12 inch Schick arm carrying an Ortofon Royal N SPU on an AT 18gm Technihard head shell. The stock zamac platter was replaced with a cast iron platter acquired on eBay. Amongst the many modifications (geltec bushings and dots) my final change was the addition of a Merrill - Scillia lead/cork/rubber record mat modified for a 124. The table is extremely quiet and I am very pleased with the overall performance. kevinkr Sat, 01 Feb 2014 20:46:19 -0500 My Fully Restored TD-124/II http://www.diyaudio.com/forums/gallery/showphoto.php/photo/10064 <a href="http://www.diyaudio.com/forums/gallery/showphoto.php/photo/10064" target="_blank"><img title="td124-1.jpg" border="0" src="http://origin.dastatic.com/forums/gallery/data/1437/thumbs/td124-1.jpg" alt="td124-1.jpg" /></a><br /><br />by: kevinkr<br /><br />Description: Now installed in a slate plinth, and equipped with a 12&amp;quot; Schick arm carrying an Ortofon Royal N SPU on an AT 18gm Technihard head shell. The stock zamac platter was replaced with a cast iron platter acquired on eBay. kevinkr Sat, 01 Feb 2014 20:46:19 -0500 The Basket Case TD-124/I http://www.diyaudio.com/forums/gallery/showphoto.php/photo/10062 <a href="http://www.diyaudio.com/forums/gallery/showphoto.php/photo/10062" target="_blank"><img title="td-124-2-2.jpg" border="0" src="http://origin.dastatic.com/forums/gallery/data/1437/thumbs/td-124-2-2.jpg" alt="td-124-2-2.jpg" /></a><br /><br />by: kevinkr<br /><br />Description: This particular TD-124/I was given to me in pieces, it had apparently been stripped of most key parts to upgrade a TD-121. Initially I ran it as a TD-121 while I scrounged around for the parts to restore it on eBay. I acquired a bearing housing and spindle, the housing I rebuilt with fresh bushings (Spanish) and a thick steel endcap. I scored a parts unit on eBay for a fairly obscene price which donated its strobe, speed change mechanism, and various other parts to this table. The platter is a MKII zamac platter with a glass platter on top. The arm is a modified SME 3009 Series II (SPU compatibility) with an Ortofon GM E II SPU on it. kevinkr Sat, 01 Feb 2014 20:39:29 -0500 The Basket Case TD-124/I (2014) http://www.diyaudio.com/forums/gallery/showphoto.php/photo/10061 <a href="http://www.diyaudio.com/forums/gallery/showphoto.php/photo/10061" target="_blank"><img title="td-124-2-2.jpg" border="0" src="http://origin.dastatic.com/forums/gallery/data/1437/thumbs/td-124-2-2.jpg" alt="td-124-2-2.jpg" /></a><br /><br />by: kevinkr<br /><br />Description: This particular TD-124/I was given to me in pieces, it had apparently been stripped of most key parts to upgrade a TD-121. Initially I ran it as a TD-121 while I scrounged around for the parts to restore it on eBay. I acquired a bearing housing and spindle, the housing I rebuilt with fresh bushings (Spanish) and a thick steel endcap. I scored a parts unit on eBay for a fairly obscene price which donated its strobe, speed change mechanism, and various other parts to this table. The platter is a MKII zamac platter with a glass platter on top. The arm is a modified SME 3009 Series II (SPU compatibility) with an Ortofon GM E II SPU on it. kevinkr Sat, 01 Feb 2014 20:39:29 -0500 TD-124 Series I (The Basket Case) http://www.diyaudio.com/forums/gallery/showphoto.php/photo/10060 <a href="http://www.diyaudio.com/forums/gallery/showphoto.php/photo/10060" target="_blank"><img title="td124-2.jpg" border="0" src="http://origin.dastatic.com/forums/gallery/data/1497/thumbs/td124-2.jpg" alt="td124-2.jpg" /></a><br /><br />by: kevinkr<br /><br />Description: This table was given to me in pieces, little more than the motor, the chassis and a few odds and ends from a TD-121 which apparently was upgraded by using parts from this table. It was temporarily reincarnated as a TD-121 while I searched for parts to restore it on eBay. The main bearing is rebuilt with new bushings from Spain, and a steel end cap. The motor was pulled apart, cleaned and lubed - the original bearings remain. The speed change mechanism, strobe, platter, spindle and a good many other parts came off of a donor table and parts acquired over a long time on eBay.. Today this unit is equipped with a MKII Zamac platter with a cork isolated glass platter on top of that. The arm is a slightly modified SME 3009 Series II running an Ortofon GM E II SPU. kevinkr Sat, 01 Feb 2014 20:32:07 -0500 Simple DIY Turntable AKA &quot;The Phenolic Wonder&quot; http://www.diyaudio.com/forums/gallery/showphoto.php/photo/5832 <a href="http://www.diyaudio.com/forums/gallery/showphoto.php/photo/5832" target="_blank"><img title="000031.jpg" border="0" src="http://origin.dastatic.com/forums/gallery/data/1437/thumbs/000031.jpg" alt="000031.jpg" /></a><br /><br />by: kevinkr<br /><br />Description: Phenolic plinth, TD-125 MKI main bearing, sub and main platters. Linn Basik arm and AT-120E/T cartridge. Fishing line drive via Tim Audio motor pod. Surprisingly quiet and overall fairly decent sounding. Edit 2014: I gave this to a deserving friend a couple of years ago where it has continued to give good if not stellar service.. kevinkr Thu, 16 Dec 2010 02:01:35 -0500 6V6 SEP Amp http://www.diyaudio.com/forums/gallery/showphoto.php/photo/5831 <a href="http://www.diyaudio.com/forums/gallery/showphoto.php/photo/5831" target="_blank"><img title="00001.jpg" border="0" src="http://origin.dastatic.com/forums/gallery/data/1437/thumbs/00001.jpg" alt="00001.jpg" /></a><br /><br />by: kevinkr<br /><br />Description: Stereo single ended pentode amp with triode mode. Battery generated grid bias on output stage. 6J7 pentode input stage. Two nested global feedback loops. Edit 2014: I'm still using this amplifier for computer sound with a pair of modest Cambridge Soundworks speakers I picked up for $15/pr... It sounds pretty good. At a recent get together it was the toast of the town, it was very synergistic with the owner's loudspeaker system - in pentode mode at that. kevinkr Thu, 16 Dec 2010 02:01:34 -0500 26 DHT Line stage circa 2009 http://www.diyaudio.com/forums/gallery/showphoto.php/photo/4197 <a href="http://www.diyaudio.com/forums/gallery/showphoto.php/photo/4197" target="_blank"><img title="ffafa48595f9db5f0e985713a4a0525d_168.jpg" border="0" src="http://origin.dastatic.com/forums/gallery/data/1437/thumbs/ffafa48595f9db5f0e985713a4a0525d_168.jpg" alt="ffafa48595f9db5f0e985713a4a0525d_168.jpg" /></a><br /><br />by: kevinkr<br /><br />Description: This is a picture of the original line stage, since that time the power supply has been completely redesigned and is about 20dB quieter than the design it replaced. The cans around the 26s are WE knockoffs from HK, and were instrumental in getting an acceptable SNR. The switching filament supply was replaced with an analog supply which due to transformer flux had to be relocated outside of the existing chassis. The eventual plan is to build a new one in two boxes using many of the parts from this one. kevinkr Sun, 27 Sep 2009 23:42:42 -0400 Onken right channel (A previous configuration) http://www.diyaudio.com/forums/gallery/showphoto.php/photo/4198 <a href="http://www.diyaudio.com/forums/gallery/showphoto.php/photo/4198" target="_blank"><img title="37c501903f8c10eebc58f0de32117cd3_169.jpg" border="0" src="http://origin.dastatic.com/forums/gallery/data/1437/thumbs/37c501903f8c10eebc58f0de32117cd3_169.jpg" alt="37c501903f8c10eebc58f0de32117cd3_169.jpg" /></a><br /><br />by: kevinkr<br /><br />Description: 2402 ferrite annular ring tweeter on the top end, and probably a 2420 with 2312 horn and 2308 clone diffuser. This was superceded a couple of years ago by the current set up. kevinkr Sun, 27 Sep 2009 23:42:42 -0400 Onken 3 way XO LR 12dB/Octave @ 800Hz and 8kHz http://www.diyaudio.com/forums/gallery/showphoto.php/photo/4201 <a href="http://www.diyaudio.com/forums/gallery/showphoto.php/photo/4201" target="_blank"><img title="e7597d5f54e3854e62a594c3eab30e8b_173.jpg" border="0" src="http://origin.dastatic.com/forums/gallery/data/1437/thumbs/e7597d5f54e3854e62a594c3eab30e8b_173.jpg" alt="e7597d5f54e3854e62a594c3eab30e8b_173.jpg" /></a><br /><br />by: kevinkr<br /><br />Description: Designed in late 2007 using LTSpice and simple speaker models - it proved to be a huge improvement in performance over the butterworth based design it replaced. The acoustic sum in the xo region is now flat as it should be.<br /><br />1 comment kevinkr Sun, 27 Sep 2009 23:42:42 -0400 Rack set around 2009 http://www.diyaudio.com/forums/gallery/showphoto.php/photo/4200 <a href="http://www.diyaudio.com/forums/gallery/showphoto.php/photo/4200" target="_blank"><img title="799f06eab1e37005a12b23b44fcea935_171.jpg" border="0" src="http://origin.dastatic.com/forums/gallery/data/1437/thumbs/799f06eab1e37005a12b23b44fcea935_171.jpg" alt="799f06eab1e37005a12b23b44fcea935_171.jpg" /></a><br /><br />by: kevinkr<br /><br />Description: My how things have changed! This old photo shows the system about 5 yrs ago. Since that time the TD-125/I has been replaced with a TD-124/II, the 300B power amp has been replaced with GM70 monoblocks, the phono stage with the Muscovite, the shigaclone is gone, the dac completely revised, and a new media server built which can be remotely controlled by my phone. kevinkr Sun, 27 Sep 2009 23:42:42 -0400 G36 III http://www.diyaudio.com/forums/gallery/showphoto.php/photo/4193 <a href="http://www.diyaudio.com/forums/gallery/showphoto.php/photo/4193" target="_blank"><img title="1979127da1e73ce24e41798f7c6504dd_167.jpg" border="0" src="http://origin.dastatic.com/forums/gallery/data/1437/thumbs/1979127da1e73ce24e41798f7c6504dd_167.jpg" alt="1979127da1e73ce24e41798f7c6504dd_167.jpg" /></a><br /><br />by: kevinkr<br /><br />Description: My restored ReVox G36 has moved on, I gave it away recently when it could not acquit itself against my M Audio Audiophile 2496 sound card in a head to head A/B performance comparison recording the same record. Not much space down here, sadly time to move it on. kevinkr Sun, 27 Sep 2009 23:42:42 -0400 My work bench in 2009 http://www.diyaudio.com/forums/gallery/showphoto.php/photo/4128 <a href="http://www.diyaudio.com/forums/gallery/showphoto.php/photo/4128" target="_blank"><img title="c2efd9f8e8dff97a9450adb08e5e9c48_95.jpg" border="0" src="http://origin.dastatic.com/forums/gallery/data/1437/thumbs/c2efd9f8e8dff97a9450adb08e5e9c48_95.jpg" alt="c2efd9f8e8dff97a9450adb08e5e9c48_95.jpg" /></a><br /><br />by: kevinkr<br /><br />Description: Some things remain the same while others change. I have a lot more test capability than when this was taken. I can curve trace tubes, perform FFT and have two high performance audio test sets in excellent working order. I still have the wavetek function generator, it's in my storage cabinet. The laptop died and went to heaven some time ago. The bench is more cluttered than ever - a lament that goes way back. :D kevinkr Sun, 27 Sep 2009 23:42:42 -0400 My amateurish looking shigaclone http://www.diyaudio.com/forums/gallery/showphoto.php/photo/4127 <a href="http://www.diyaudio.com/forums/gallery/showphoto.php/photo/4127" target="_blank"><img title="46be14f862d435f099a5f50f1b587613_94.jpg" border="0" src="http://origin.dastatic.com/forums/gallery/data/1437/thumbs/46be14f862d435f099a5f50f1b587613_94.jpg" alt="46be14f862d435f099a5f50f1b587613_94.jpg" /></a><br /><br />by: kevinkr<br /><br />Description: Since moved on to a friend. The dac has been redesigned and now occupies two boxes and has a passive resistor/transformer coupled tube amplified I/V, sonically a quantum leap compared to the THS4131 I was using previously. kevinkr Sun, 27 Sep 2009 23:42:42 -0400