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SurfGuitar101 Forums » The Shallow End »

Share my joy ...

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ElBirkerio Joined: Dec 17, 2012 Posts: 519 Vienna	Posted on Jan 14 2016 01:47 PM Hi! After playing tube amps for a while, I went a little further - meet the home-built, single ended 11W Class A Stereo that now powers my old Bang&Olufsen Beovox 2400 ... Yours Wolfi — http://www.surfgrammeln-san.org https://www.facebook.com/BaluUndSurfgrammeln http://greencookierecords.bandcamp.com/album/coming-out-soon-los-chicharrones-del-surf-10 Top
caddady Joined: Feb 14, 2010 Posts: 802 N.E. Ohio	Posted on Jan 14 2016 03:13 PM — http://www.reverbnation.com/thegreasemonkeyz Top
Badger Joined: Nov 16, 2013 Posts: 4536 Wisconsin	Posted on Jan 14 2016 05:29 PM Beautimous! How's it sound? — Wes SoCal ex-pat with a snow shovel DISCLAIMER: The above is opinion/suggestion only & should not be used for mission planning/navigation, tweaking of instruments, beverage selection, or wardrobe choices. Top
ElBirkerio Joined: Dec 17, 2012 Posts: 519 Vienna	Posted on Jan 14 2016 11:50 PM Hi! There is voodoo to tube stereo, but it sounds very good and clear actually. It is also very, very loud for 11 W and 20 W boxes ,,, Yours Wolfi — http://www.surfgrammeln-san.org https://www.facebook.com/BaluUndSurfgrammeln http://greencookierecords.bandcamp.com/album/coming-out-soon-los-chicharrones-del-surf-10 Top
eddiekatcher Joined: Mar 14, 2006 Posts: 2775 Atlanta, GA	Posted on Jan 15 2016 01:18 PM El-B, Nice, very nice. Looking at the chassis are you contemplating "push pull?" ed — Traditional........speak softly and play through a big blonde amp. Did I mention that I still like big blonde amps? Top
ElBirkerio Joined: Dec 17, 2012 Posts: 519 Vienna	Posted on Jan 15 2016 05:58 PM Nice, very nice. Looking at the chassis are you contemplating "push pull?" Single Ended ... Push Pull ... I am still contemplating getting a green energy Z certificate ;) But it is a single ended class A amp ... Yours Wolfi — http://www.surfgrammeln-san.org https://www.facebook.com/BaluUndSurfgrammeln http://greencookierecords.bandcamp.com/album/coming-out-soon-los-chicharrones-del-surf-10 Last edited: Jan 16, 2016 02:50:50 Top
ElBirkerio Joined: Dec 17, 2012 Posts: 519 Vienna	Posted on Feb 27 2016 05:33 AM hi! posted it yesterday in the "Workbench" thread - but however ... I am terribly proud of the next add-on, the indicator for that stereo yours wolfi — http://www.surfgrammeln-san.org https://www.facebook.com/BaluUndSurfgrammeln http://greencookierecords.bandcamp.com/album/coming-out-soon-los-chicharrones-del-surf-10 Top
caddady Joined: Feb 14, 2010 Posts: 802 N.E. Ohio	Posted on Feb 27 2016 08:14 AM Wow those blue lights take me back to the big hi-fi consoles our parents had(with built in reverb). Well done Wolfi. What is this Z certificate you speak of? — http://www.reverbnation.com/thegreasemonkeyz Top
ElBirkerio Joined: Dec 17, 2012 Posts: 519 Vienna	Posted on Feb 27 2016 10:03 AM hi! the certificate is a joke - in the EU, we have this energy efficacy rating for electrical appliances, but also buildings and so on (https://en.wikipedia.org/wiki/Energy_Performance_Certificate)... A+++ is best and so on ... given the fact that a class a amp has a degree of efficiency of 6 % - plus the fact that I will now also add a rather pointless circuit with an additional effective draw of ~50 W, I tend to think that this certification process would yield a z--- rating yours wolfi — http://www.surfgrammeln-san.org https://www.facebook.com/BaluUndSurfgrammeln http://greencookierecords.bandcamp.com/album/coming-out-soon-los-chicharrones-del-surf-10 Top
Badger Joined: Nov 16, 2013 Posts: 4536 Wisconsin	Posted on Feb 27 2016 06:12 PM ElBirkerio wrote: hi! the certificate is a joke - in the EU, we have this energy efficacy rating for electrical appliances, but also buildings and so on (https://en.wikipedia.org/wiki/Energy_Performance_Certificate)... A+++ is best and so on ... given the fact that a class a amp has a degree of efficiency of 6 % - plus the fact that I will now also add a rather pointless circuit with an additional effective draw of ~50 W, I tend to think that this certification process would yield a z--- rating yours wolfi It's a thing of beauty anyway. Tell the moral busybodies to pound sand. — Wes SoCal ex-pat with a snow shovel DISCLAIMER: The above is opinion/suggestion only & should not be used for mission planning/navigation, tweaking of instruments, beverage selection, or wardrobe choices. Top
ElBirkerio Joined: Dec 17, 2012 Posts: 519 Vienna	Posted on Feb 28 2016 04:20 AM ... there is also another positive sideeffect - the heating cost in my living room is definitely reduced!!! yours wolfi — http://www.surfgrammeln-san.org https://www.facebook.com/BaluUndSurfgrammeln http://greencookierecords.bandcamp.com/album/coming-out-soon-los-chicharrones-del-surf-10 Top
Badger Joined: Nov 16, 2013 Posts: 4536 Wisconsin	Posted on Feb 28 2016 05:22 AM ElBirkerio wrote: ... there is also another positive sideeffect - the heating cost in my living room is definitely reduced!!! yours wolfi Absolutely! Warm glass is a wonderful thing. Did you develop this circuit yourself, or did you have an online source for the project? — Wes SoCal ex-pat with a snow shovel DISCLAIMER: The above is opinion/suggestion only & should not be used for mission planning/navigation, tweaking of instruments, beverage selection, or wardrobe choices. Top
ElBirkerio Joined: Dec 17, 2012 Posts: 519 Vienna	Posted on Feb 28 2016 06:02 AM hi! no, i did not develop it myself - the amp is a kit from a guy that also made the transformers. however, Class A amps were probably finally developed around 1910 and have changed very little ever since, so there is no black magic in that circuit. the costly part is the transformers. unfortunately, the guy who sent me the boards and transformers was doing a one-man company, and he died suddenly. so wiring the transformer was a bit of a challenge as i had no schematic the EM84 circuit is from ebay and costs about 5€ - http://www.ebay.at/itm/Magic-Eye-Tube-6E2-EM84-VU-Meter-Audio-Level-Indicator-Board-One-6E2-tube-/131590534397?hash=item1ea36834fd:g:P4UAAOSwsB9WAq1K ... the power circuit consists of a little toroidal transformer (also from ebay) with 180V AC and 6.3 V / 1.5 A AC. the grid voltage is rectified, goes into the capacitor is further stabilized by a chain of zener-diodes and a FET. the filament voltage is simply rectified without further ado ... still looking for a tube driven phono-preamp kit - any suggestions :D? yours wolfi — http://www.surfgrammeln-san.org https://www.facebook.com/BaluUndSurfgrammeln http://greencookierecords.bandcamp.com/album/coming-out-soon-los-chicharrones-del-surf-10 Top
Badger Joined: Nov 16, 2013 Posts: 4536 Wisconsin	Posted on Feb 28 2016 06:37 AM Thanks for the info. No suggestions on the phono pre-amp... maybe someone out there has carved up an old McIntosh into a set of projects. — Wes SoCal ex-pat with a snow shovel DISCLAIMER: The above is opinion/suggestion only & should not be used for mission planning/navigation, tweaking of instruments, beverage selection, or wardrobe choices. Top
caddady Joined: Feb 14, 2010 Posts: 802 N.E. Ohio	Posted on Feb 28 2016 06:42 AM Two surfy bear fet amps in a box for a phono pre amp? — http://www.reverbnation.com/thegreasemonkeyz Top
ElBirkerio Joined: Dec 17, 2012 Posts: 519 Vienna	Posted on Feb 28 2016 06:46 AM hum - even 2 surfy bears will not serve as integrators, which renders their usability for RIAA-type signals doubtful but i found this one, which looks quite nice - http://glass-ware.stores.yahoo.net/aiphpcb.html yours wolfi — http://www.surfgrammeln-san.org https://www.facebook.com/BaluUndSurfgrammeln http://greencookierecords.bandcamp.com/album/coming-out-soon-los-chicharrones-del-surf-10 Top

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