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EL34 Baby Huey Amplifier
EL34 Baby Huey Amplifier
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Old 10th July 2019, 05:27 PM   #501
Vunce is online now Vunce  United States
diyAudio Member
Join Date: Jan 2014
Location: LI, NY
EL34 Baby Huey Amplifier
Originally Posted by Francois G View Post
I stand by the inadequacy of the original PCB, as Marc apparently is too, since he is trying to separate the main board and PSU. My request was MERELY for more information about the new PSA board, which caused Marc’s untimely blowup. Marc’s response rate to the thread is my main concern - he has been mute for several weeks if not months. If thread starters are not willing to respond to requests for information in say a reasonable 14 days, they should not start threads. Neither should diyAudio accommodate that. Perhaps Marc is too busy with his new interest, the Simple Mosfet amp, which is fine if there is no implied promise to help people who bought into his BH boards, like me.
Hello Francois G, I want to say straight up front, “I do not have a horse in this race”. That being said, I don’t understand where your snarky bitterness is stemming from? Marc has been extremely supportive through the BH process. He has always answered questions in a timely matter for myself and other members with BH build questions. He even spent the time and effort to release a build guide written in ENGLISH!! But, this is a DIY forum which does mean that members/builders are expected to do there own due diligence with respect to the project they are involved with. I don’t recall Marc making an “implied promise” to you or anyone about his plans. Your hurling insults towards Marc, and now Bfpca, are simply uncalled for. If you really think Marc’s boards are “inadequate, lacking and without innovation” just move on to another project. Regards, Vunce
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Old 10th July 2019, 06:50 PM   #502
gbowling is offline gbowling  United States
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Join Date: Jun 2008
Location: Michigan
Vunce, there is no "like" button on the forum (or if there is I can't find it). So I'll just have to respond with a "like" and a thumbs up for your comment.

This is a really great project, an easy build, and the guys running it have been nothing but first class in all aspects. The group buy I was a part of was run flawlessly and I have no issues with the design.

Even the original boards allow for an easy build that works great. Or if you don't want to use the onboard rectifier, you can choose to upgrade a bit and do your own power supply.

So, just for myself, I want to give a big thanks to marc, bfpca, prasi, vunce, and a few other people I've probably missed for all the help!

Not only for the design, boards, and group buys, but also for recommendations on transformers, external power supplies, meters, and chassis builds.

There is certainly enough good info in this thread to build a complete and very well performing amp that will give many years of service.

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Old 11th July 2019, 04:54 AM   #503
bbqrooster is offline bbqrooster  United States
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Join Date: Mar 2011
Location: San Jose
Francois, I have had enough of your snarky comments. Remember this proverb "It is better to be thought a fool than to open ones mouth and remove all doubt". I came late to the Baby Huey EL34 GB. Instead of being expedient, I read every posts about the project in order to learn everything about what others have contributed to it. I am still working on the BH EL34 slowly but surely. Reading from your posts, I already know that you have not read all the posts. This is DIYaudio, not DIFMaudio (Do it for me audio). Gingertube, Bandol et. al. contributed the circuit design and board design out of goodness of their heart. If you don't like the board design, just do your point to point connections. You can have any BF capacitors you want and be done with it.

Better yet, design your own "improved" power supply board and contribute to the community instead of complaining as if someone owes you something. No one owes you anything and no one promises you anything on this board. This is DIY. The most ridiculous thing was that you kept saying you bought 4 sets of boards as if you were a savior of the project. If you did not buy them, it just meant 4 less sets of board purchased from the board manufacturer. Prasi wouldn't shed a tear. Besides, why did you buy 4 sets of board without studying the board design. This again shows that you did not do your due diligence.
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Old 12th July 2019, 12:53 PM   #504
Francois G is offline Francois G  United States
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Join Date: Jun 2004
Location: Champaign, Illinois
Originally Posted by bbqrooster View Post
Francois, I have had enough of your snarky comments. Remember this proverb "It is better to be thought a fool than to open ones mouth and remove all doubt".
Well, mr. bbqrooster. You seem to have extensive knowledge about me and you are not shy to spread it. I do not mind it, but I want to be clear that I insulted no one, and only wanted more expedient information about Marcís new power supply board.

Originally Posted by Vunce View Post
Your hurling insults towards Marc, and now Bfpca, are simply uncalled for.
Not sure where you get this perspective. I have not and will not say anything negative about Bfpca. I really enjoyed his experimentation and his reporting of it.

Originally Posted by Francois G View Post
I bought 4 pairs of the BH boards and after I received them I looked and realized that the design is really not very smart. You tried to optimize for size, but DIY people want to optimize for best sound and ease of construction, with generous capacitor sizes, and a few Ä extra does matter not much. That is why I am interested in the new boards.
This statement was definitely clumsy and I am sorry about that. Apologies to Marc. I liked the PCB design as a very efficient use of quare cms.

Iím not sure why everyone is so negative towards me. I merely wanted Marc to provide more information about his new powersupply PCB.
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Old 12th July 2019, 03:04 PM   #505
AndroidClone is offline AndroidClone
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Do we have a gb eta? I can't stop daydreaming about my unused tubes.
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Old 12th July 2019, 03:58 PM   #506
carlthess40 is offline carlthess40  United States
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Join Date: Oct 2017
Location: Lake Mary Florida
I’d like to see a build post on the EL84 and el34 that starts and finish with just the builds and not all the great mods people are doing It’s very hard to understand what’s going on when people go off in all kinds of different things they are doing and not really talking about the step by step build of the boards More so on the EL84 I’d just like to see a post started with just doing the build with the parts being used And then after that’s done start a post of how they added all the other goods to them I’d really like to see this with the EL84, I know That there are many post on these, but show me one that’s a true from start to finish of just building the pcs boards and not all the added stuff. We have to build it first before we start doing the mods!! Right ? I’m a newbie here and I’ve asked my questions about the build and get treated like I should know all the answers These were advertised as a newbie type build.

Well I’m sitting here with a pile of parts that I don’t even want anymore I’ve been reading a ton of these builds and they all sound great. If I only knew what the H people were saying with the high level of tech talk. Don’t get me wrong here, all the guys that did the ground work for these, my hat off to you guys and a big thanks for all your time and effort And yes I have been pointed to this post, that post and every other post about these and they all go off into lala land with the builds. Like this post has gone into the wrong direction, with my help as well on driving it that way , sorry. But had to say my peace. So if someone wants to buy my EL84 boards and all the parts. Please message me and let’s make a deal. I’m in the USA and will ship it all to you. And no I’m. Not going to give it away. Thanks for letting me vent me two cents onto this post
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Old 14th July 2019, 05:39 PM   #507
bandol83 is offline bandol83  France
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Join Date: Nov 2004
Location: near Bandol, French Riviera
Hello Vunce, gbowling, bbqrooster,

Thanks for your support, I appreciate a lot because it take me time to do all that work and it is difficult for me to explain things in English because it is not my mother language and some time I don't understand some expressions and negative criticisms give me the impression that I should not spend more time to communicate hopefully you are there to motivate me to continue

I am not a designer of amplifier, I have been working in embedded computing,but since I have bought a Jolida tube amplifier about 20 years ago, I have been interested to build tube amplifier BUT I wanted to take advantage of modern semiconductors to have the best of both world

That's why I was very interested by Ian thread for the Baby Huey

After his last suggestion, I made the change for the trimmers and today I did not go to the parade for the French National Day but I finished some cosmetic changes on the MK2 version 1.5 and I think it is now ready for the PCB manufacturing...

I repeat that this version has not been tested but it use exactly the same schematic that the first version and should work without problem. Now if some members of this forum want to take the risk and if Prasi can produce the PCB, it is time to check if there is enough interest to produce it ?

Because of the rules of the forum, I suggest to use this address to register your interest with the indication of MK2 PCB : GB for Baby Huey PCB If there is enough demand and if Prasi accept to do it, we may have an other round of EL34 Baby Huey production...

You can find below the last schematic and PCB of version 1.5 as well as the pictures of my EL84 and EL34 Baby Huey as well as the one of Philippe with nice Toroidy transformers...

Attached Images
File Type: png PCB EL34 Baby Huey MK 2 Rev 1.5.png (288.9 KB, 403 views)
File Type: jpg EL34 Baby Huey with Philippe EL34.jpg (290.0 KB, 397 views)
File Type: jpg Photo Baby Huey EL84 face.JPG (452.7 KB, 391 views)
File Type: jpg pvphil EL34 Baby Huey.jpg (158.6 KB, 392 views)
Attached Files
File Type: pdf SchemaBaby Huey MK2 Rev 1.5.pdf (149.8 KB, 116 views)
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Old 14th July 2019, 06:13 PM   #508
prasi is offline prasi  India
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Location: Pune, India
EL34 Baby Huey Amplifier
hello Marc,
as you know I have promised to take baby huey MKII forward.
I am sticking to it.
Request everyone to register their interest.
If there is enough interest, I will get the pcbs produced and will supply to interested members.

My revamped site https://sites.google.com/site/analogdesign1234/
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Old 14th July 2019, 06:20 PM   #509
mravinsky is online now mravinsky  Europe
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I’m in for Two complete sets.
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Old 14th July 2019, 11:11 PM   #510
gingertube is offline gingertube  Australia
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Join Date: Oct 2004
Location: Adelaide South Oz
Marc and others, For info - with EL34 output tubes R14 and R15 may not be large enough. Some years ago I built the Menno VDV70/100 with Plitron PAT4006. It specified 150 Ohm screen resistors but it suffered "Squegging" oscillation in Ultralinear mode. I had to increase the screen resistors to 1K to cure that. I would suggest using 1K for R14 and R15 at build time, just to avoid possible problems.

Looking forward to seeing the quad output tube, ultralinear + cathode feedback design whenever you get to it. I have a pair of VDV-2100-CFB/H output transformers on my shelf . http://www.amplimo.nl/images/downloa...dv2100cfbh.pdf

Note that the 33% Ultralinear Taps plus the 10% Cathode Feedback taps mean that you actually get 10% Cathode Feedback AND 33 +10 = 43% Ultralinear Feedback.

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