itishifi.com
retro vintage modern hi-fi: August 2015
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Monday, August 31, 2015. I've never seen a YL speaker in the states. This is one I would love to hear. If anyone has additional info on YL speakers I love to see more. A rare ad courtesy of the Asylum. Thanks. Sunday, August 30, 2015. The owners of South On Main. Were kind enough to give Stacey and I the last two tickets to see Pokey LaFarge. Friday, August 28, 2015. Retro Hi-Fi Girl Friday. Wednesday, August 26, 2015. 1943 Audio Engineering - Graphical Symbols. Tuesday, August 25, 2015. Fairchild are ra...
a-direct-heating-triode.blogspot.com
a Direct Heating Triode blog: February 2016
http://a-direct-heating-triode.blogspot.com/2016_02_01_archive.html
A Direct Heating Triode blog. Feb 26, 2016. MC1/60, E60M, TM100 SE amplifier - Part 2. Back on the air with amplifier circuit. We need 600V for the final stage, 300V for driver, negative bias voltage, heater voltage. High voltage is not very high, I can take advantage of vacuum tube rectifier (helps for soft start) and polypropylene capacitor for main supply. I prefer the sound of these caps over the usual electrolytics. Main power transformer windings. 3- 50V for bias. 5- 63V for 6SN7. 6- 5V for GZ34.
a-direct-heating-triode.blogspot.com
a Direct Heating Triode blog: September 2016
http://a-direct-heating-triode.blogspot.com/2016_09_01_archive.html
A Direct Heating Triode blog. Sep 7, 2016. E140 SE A2 amplifier Part 2. Class A2 amplifiers need a more elaborated driver than the usual A1. Though providing a quite low impedance path to the E140, the IT voltage ratio (1,73 10. Or -15,3dB) commands a tube capable of a very large anode swing with low distortion. Not so many candidates. Keeping in mind the necessity of a current not exceeding 10mA trough IT (it roughly corresponds to twice the E140 grid current at maximum positive swing) the 12B4A. I need...
a-direct-heating-triode.blogspot.com
a Direct Heating Triode blog: June 2016
http://a-direct-heating-triode.blogspot.com/2016_06_01_archive.html
A Direct Heating Triode blog. Jun 15, 2016. 6J5 line preamplifier Part 3. Back on the air. Normally there should not be a part 3, but I recently found a few Visseaux 6J5G and put them to good use in my line preamp. The combo brings music reproduction to a truthful level hard to beat. Visseaux was a French manufacturer established near Lyon that made high quality tubes (each being individually tested) till the 50's before becoming an ITT subsidiary. A snapshot of my main sytem. Modified Klipsch La Scala.
a-direct-heating-triode.blogspot.com
a Direct Heating Triode blog: May 2016
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A Direct Heating Triode blog. May 3, 2016. 6J5 line preamplifier Part 2. Needless to say that a good supply, free of ripple, is essential in SE stage that have very bad CMRR. This generally dictate a large capacitor bank at the expense of transient response due to great time recovery. As I prefer a punchy response it needs a good calculation of the filtering cells to keep ripple at least 10. 80 dB) below last stage voltage. Means 240*10. Or 2,4 mV rms while keeping the smallest possible time constant.
signatureplates.com
Articles - Signature Plates Custom Name Plates
http://signatureplates.com/articles
Products & Services. No products in the cart. Testimonial: Dealing with Signature Plates has been a great experience. September 29, 2015. Okay … this may be one of the COOLEST items we’ve helped “Sign Your Work” — check out 13Audio. To learn more about their handcrafted replica Victor Talking Machines! We loved working with Timothy to design a nameplate worthy of this beautiful product. 8220;Dealing with Signature Plates has been a great experience. Posted in Commercial Nameplates. September 22, 2015.
a-direct-heating-triode.blogspot.com
a Direct Heating Triode blog: April 2016
http://a-direct-heating-triode.blogspot.com/2016_04_01_archive.html
A Direct Heating Triode blog. Apr 14, 2016. 6J5 line preamplifier Part 1. The 6J5 is a general purpose not to say an ubiquitous small signal triode. Its linearity is well known and appreciated by many DIYer's. It is commonly said that what goes in is what comes out. It is the successor of the glorious 27 / 56 family of tubes. And has been declined in numerous shapes (G, GT, Metal) and constructions (i.e.the weird E11488. To meet industry or military requirements. The British denominations is L63. These a...
a-direct-heating-triode.blogspot.com
a Direct Heating Triode blog: Garage sales
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A Direct Heating Triode blog. Here is the place for amps, parts and other stuff I sell. VT25/VT25A push pull amplifier. Will be supplied with NOS Sylvania VT25 (Excellent for medium high in a bi amp system) or NOS Sylvania VT25A (Preferred choice for full range use), NOS RCA 5R4GY rectifier and NOS Thomson CSF 5687WA. Euros 3400 shipping and insurance. Local pick up welcome. EL84 push pull amplifier. Primary voltage 100,110,130,220,240V. Euros 2200 shipping and insurance. Local pick up welcome.
a-direct-heating-triode.blogspot.com
a Direct Heating Triode blog: March 2016
http://a-direct-heating-triode.blogspot.com/2016_03_01_archive.html
A Direct Heating Triode blog. Mar 23, 2016. EL84 Push Pull amplifier, the little giant. The EL84 is NOT a DHT, but still a fascinating tube for many triodes lovers (I belong to this group) who recognize its sonic qualities. In the past 20 years I made half a dozen amplifiers using this tube, always with great pleasure, and that's why I decided to make a post about it. Also because I always keep an EL84 amp to drive my beloved Wharfedale Super 12 RS/DD. Why the HK amplifier? HK 20 original schematic.
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