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Read the Post in new Window Read the Post in Threaded view  Post #7: The capacitor as not only a capacitor by Romy the Cat on 2007-08-08 
Browse the content of the threads in new Window  Thread: What is the buzz: the V-Caps? in Audio Discussions  19 Replies 
[quote user="drdna"]…… people forget that a circuit is a physical collection of dynamically interacting electromagnetic fields…… [/quote] Isn’t it might a separate VERY large subject? [quote user="drdna"] The low level resolution is exquisite but t...

Read the Post in new Window Read the Post in Threaded view  Post #91: To kill of do not kill the capacitor. by Romy the Cat on 2008-12-29 
Browse the content of the threads in new Window  Thread: Single-stage Melquiades vs. DHT amps in Melquiades Amplifier  397 Replies 
I am taking about coupling capacitor between driver tube and the DHT. There are zillion way to do it and no one said that they need to be used. No one proved yet that a very good quality of caps shell be worse than other methods. In my case since the...

Read the Post in new Window Read the Post in Threaded view  Post #7: No input capacitor... by Romy the Cat on 2012-06-12 
Browse the content of the threads in new Window  Thread: Multi-amping crossovering. in Audio Discussions  6 Replies 
I do not think that Lamm uses input capacitor, come on, this is not am amp from Radio Shack!  Anyhow, I would not use input capacitor under any circumstances, would it be for filtration or for any other reasons. Yes, ML2 used global feedback....

Read the Post in new Window Read the Post in Threaded view  Post #4: The capacitor shootout by Romy the Cat on 2007-08-07 
Browse the content of the threads in new Window  Thread: What is the buzz: the V-Caps? in Audio Discussions  19 Replies 
Here is a good material with Chinese capacitor shootout http://www.goodsoundclub.com/PDF/capacitorshootout.pdf It looks like more or less intelligent writing, thought the caps sitting between stage and caps sitting in feedback work differently (con...

Read the Post in new Window Read the Post in Threaded view  Post #82: Coupling capacitor by Romy the Cat on 2014-02-04 
Browse the content of the threads in new Window  Thread: Bias help in Melquiades Amplifier  96 Replies 
Daniel, if you have start, the igniting voltage, on the gas tubes 197V then it is perfect. If the tubes do maintain stable 150C then leave it as it. Each of the gas tribes has own stabilization voltage. If one of them has let say 148V and another 150...

Read the Post in new Window Read the Post in Threaded view  Post #17: Measuring resistance across a capacitor by JJ Triode on 2022-01-03 
Browse the content of the threads in new Window  Thread: R22 in Melquiades Amplifier  34 Replies 
Domidaw, you are looking at the right things but there is something to consider: when you put a resistance meter across a discharged capacitor you see a low resistance initially because the battery in the meter is charging the capacitor a little, so ...

Read the Post in new Window Read the Post in Threaded view  Post #13: In particular check capacitor polarity by JJ Triode on 2022-01-02 
Browse the content of the threads in new Window  Thread: R22 in Melquiades Amplifier  34 Replies 
If C10 is connected backwards there could well be a large leakage current through it. It may also have been damaged if this is the case, requiring its replacement....

Read the Post in new Window Read the Post in Threaded view  Post #36: Coupling capacitor by decoud on 2012-08-08 
Browse the content of the threads in new Window  Thread: Full range Melquiades implementation in Melquiades Amplifier  81 Replies 
Hi Romy, I imagine the coupling cap in the full range melq acts as a first order high pass filter: is there any reason why one could not lower its value to raise the cutoff to a level one would otherwise redundantly need a speaker-level filter to ach...

Read the Post in new Window Read the Post in Threaded view  Post #1: The Melquiades bass channels: the coupling capacitor. by Romy the Cat on 2007-08-13 
Browse the content of the threads in new Window  Thread: The Melquiades bass channels: the coupling capacitor. in Melquiades Amplifier  11 Replies 
I was contemplating the 6 Channel Super Melquiades conversion – it will quite a revision – and I am slowly inclining to make it not 6 Channel but 7 channels…Anyhow, the post will not be about the needs of extra 7th channel but rather about one of the...

Read the Post in new Window Read the Post in Threaded view  Post #306: Capacitor choices by drdna on 2009-05-17 
Browse the content of the threads in new Window  Thread: Single-stage Melquiades vs. DHT amps in Melquiades Amplifier  397 Replies 
This is exactly what I settled on in my SET amplifiers, so at least it  gives some credence that we all seem to agree.Adrian...

Read the Post in new Window Read the Post in Threaded view  Post #8: The capacitor shootout #2 by Romy the Cat on 2007-08-25 
Browse the content of the threads in new Window  Thread: What is the buzz: the V-Caps? in Audio Discussions  19 Replies 
The Netherlanders Tony Gee after geting sick to fight with his stupid Fostexes and Lowthers have his run over capacitors. http://www.humblehomemadehifi.com/Cap.htmlThe Cat...

Read the Post in new Window Read the Post in Threaded view  Post #16: Capacitor oil? by Paul S on 2008-05-16 
Browse the content of the threads in new Window  Thread: Purist Audio Design vs. Purist Audio Design in Audio Discussions  25 Replies 
JUst a thought I've been sitting on for a while.No, I've never tried finding the stuff.Some kind of mineral oil with excelent dielectric properties.Paul S...

Read the Post in new Window Read the Post in Threaded view  Post #43: Deletion of V2 cathode capacitor and gain by Terry Maddocks on 2020-09-02 
Browse the content of the threads in new Window  Thread: About EAR 834P Modifications in Analog Playback  45 Replies 
Hi Romy,I am currently in the process of rebuilding my 834 PT. I see you don't use the capacitor bypass on V2, does this have any effect on overall gain of the corrector? I've recently acquired audio Technica ART7 cartridge which is low (0.12 mv) out...

Read the Post in new Window Read the Post in Threaded view  Post #303: Big output capacitor question. by AlexBerger on 2021-03-05 
Browse the content of the threads in new Window  Thread: The last phonocorrector: “End of Life" Phonostage in Analog Playback  310 Replies 
Hi Guys,The output impedance of ECC83 in cathode follower is around 625 Oms. But 1uF capacitor makes output impedance very big on low frequencies (around 8K Ohm at 20Hz). And in this schematics the global feedback doesn't work at low frequencies. So ...

Read the Post in new Window Read the Post in Threaded view  Post #527: Romy, your point is taken by PurePower on 2010-05-03 
Browse the content of the threads in new Window  Thread: It’s mad, mad, mad... electricity. in Audio Discussions  1910 Replies 
You point out that if a capacitor can hum it is faulty and wound improperly. You are absolutely correct  - the way a capacitor is wound will determine if it can hum or not. Unfortunately almost all capacitors on the market are wound in a way that...

Read the Post in new Window Read the Post in Threaded view  Post #523: The nonsense of Buzzing capacitors? by Romy the Cat on 2010-05-01 
Browse the content of the threads in new Window  Thread: It’s mad, mad, mad... electricity. in Audio Discussions  1910 Replies 
[quote user="PurePower"]Hi Max,If you have buzzing that is audible outside the PurePower case, or audible from a listening position, the behavior is not normal. The probable source is a capacitor. Caps can hum in the same way as transformers - the fo...

Read the Post in new Window Read the Post in Threaded view  Post #528: Capacitors must be silent and in context of this thread. by Romy the Cat on 2010-05-03 
Browse the content of the threads in new Window  Thread: It’s mad, mad, mad... electricity. in Audio Discussions  1910 Replies 
[quote user="PurePower"] You point out that if a capacitor can hum it is faulty and wound improperly. You are absolutely correct  - the way a capacitor is wound will determine if it can hum or not. Unfortunately almost all capacitors on the m...

Read the Post in new Window Read the Post in Threaded view  Post #3: these are just caps, yes? by drdna on 2007-08-06 
Browse the content of the threads in new Window  Thread: What is the buzz: the V-Caps? in Audio Discussions  19 Replies 
I tried the V-caps in my system and it changed the sound.  This is not a big surprise.  Any time you change caps, even to the same cap, it is not broken in and you have been soldering and tinkering with your system, and it needs time to set...

Read the Post in new Window Read the Post in Threaded view  Post #303: Big output capacitor question. by AlexBerger on 2021-03-05 
Browse the content of the threads in new Window  Thread: The last phonocorrector: “End of Life" Phonostage in Analog Playback  310 Replies 
Hi Guys,The output impedance of ECC83 in cathode follower is around 625 Oms. But 1uF capacitor makes output impedance very big on low frequencies (around 8K Ohm at 20Hz). And in this schematics the global feedback doesn't work at low frequencies. So ...

Read the Post in new Window Read the Post in Threaded view  Post #1808: Class AB load vs Class A load by Amir on 2021-12-06 
Browse the content of the threads in new Window  Thread: It’s mad, mad, mad... electricity. in Audio Discussions  1910 Replies 
Adrian Thank you for helpI think i should 100% agree youDid you compared class ab vs class a power amp when you connect them to pp3000?xandcgI have read about romy experience with paralleling capacitor with battery but it seems it does not help .I ha...

Read the Post in new Window Read the Post in Threaded view  Post #7: Re: My very different objectives by deemon on 2006-02-22 
Browse the content of the threads in new Window  Thread: Driver tubes, grid leak biasing, and fidelity in Melquiades Amplifier  7 Replies 
Grid leak bias is not reliable itself . Grid current is very low and grid resistor is very big , the circuit become very sensitive to all destabilizing factors - capacitor leak , humidity , temperature . And when we apply a big input signal to t...

Read the Post in new Window Read the Post in Threaded view  Post #7: No input capacitor... by Romy the Cat on 2012-06-12 
Browse the content of the threads in new Window  Thread: Multi-amping crossovering. in Audio Discussions  6 Replies 
I do not think that Lamm uses input capacitor, come on, this is not am amp from Radio Shack!  Anyhow, I would not use input capacitor under any circumstances, would it be for filtration or for any other reasons. Yes, ML2 used global feedback....

Read the Post in new Window Read the Post in Threaded view  Post #95: I do not think so but I migh be wrong. by Romy the Cat on 2013-10-14 
Browse the content of the threads in new Window  Thread: Lamm Industries: a special interview with a special company in Audio News  97 Replies 
[quote user="haralanov"] According to a friend of mine, who has a lot of experience with GM70, this tube starts to sing only with (very high quality) interstage transformer coupling. He told me that when it is used with coupling capacitor (as is the ...

Read the Post in new Window Read the Post in Threaded view  Post #41: The singe-stage, the S2, the RL filter and the … Alleluia. by Romy the Cat on 2007-09-20 
Browse the content of the threads in new Window  Thread: 6 Channel Version of Super Melquiades in Melquiades Amplifier  131 Replies 
One of the most interesting outcomes of the Milq conversion into 6 channels is the impact it had to it MF channel.  The tweeter is a separate subject, I still work on it, I know how it will be done but I did not hear the final result. I would li...

Read the Post in new Window Read the Post in Threaded view  Post #121: Everything about everything. by Romy the Cat on 2009-01-20 
Browse the content of the threads in new Window  Thread: Single-stage Melquiades vs. DHT amps in Melquiades Amplifier  397 Replies 
[quote user="floobydust"]  The main component that limits low-frequency response in any SET is the OPT. For these initial designs, I used the smallest Hashimoto SE OPTs... their H-203S for the 2A3 and their H-507S for the 45 which are rated at 7...

Read the Post in new Window Read the Post in Threaded view  Post #304: Electrolytics, technology and time by floobydust on 2009-05-17 
Browse the content of the threads in new Window  Thread: Single-stage Melquiades vs. DHT amps in Melquiades Amplifier  397 Replies 
 Paul, Some good valid points... yes, they've gotten much better over the years, no doubt to technology improvements. A good example is Mallory CGS caps made in the 80's versus new ones. The newer ones are much lighter physically (same p/n), hence th...

Read the Post in new Window Read the Post in Threaded view  Post #1: 250 watts Parallel S.E. advises by devo_yan on 2018-05-16 
Browse the content of the threads in new Window  Thread: 250 watts Parallel S.E. advises in Audio Discussions  13 Replies 
Hello every body, I live in France and I'm new on this forum.I'm thinking to build (some months) a mono big Single Ended amplifier (200-300 watts) made with triodes (IDHT or DHT doesn't matter for me) for outdoor professional audio.Have you got an on...

Read the Post in new Window Read the Post in Threaded view  Post #120: How many stages and why... and who makes that 45 or 2A3 by floobydust on 2009-01-20 
Browse the content of the threads in new Window  Thread: Single-stage Melquiades vs. DHT amps in Melquiades Amplifier  397 Replies 
 First, Adrian, Thanks for your feedback on the newer designed 2A3 tubes... very interesting. I've looked at all 3 of these brands before but have not as of yet purchased any (I have a large collection of 45 and 2A3 of various NOS US brands...

Read the Post in new Window Read the Post in Threaded view  Post #94: GM70 and interstage capacitors by haralanov on 2013-10-14 
Browse the content of the threads in new Window  Thread: Lamm Industries: a special interview with a special company in Audio News  97 Replies 
[quote user="Romy the Cat"]The re-charged cap works fine but changing the cap polarity by re-recharging is while it handles the signal is not a very good idea in my view. All that dialectic in the cap needs to be re-polarized – it sound too unattract...

Read the Post in new Window Read the Post in Threaded view  Post #305: EAR by AlexBerger on 2021-03-06 
Browse the content of the threads in new Window  Thread: The last phonocorrector: “End of Life" Phonostage in Analog Playback  310 Replies 
Hi Paul,My question was of cause about my phonostage based on EAR834p and "End Of Live" modification with air capacitors and LCLC + 0A2 power supply.A couple weeks before I increase the second stage ECC83 cathode capacitor value to 43400uF (Kaisei no...
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