Recent content by bhjazz
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Bijou All Tube Futterman Headphone Amplifier
It's finally done. The project that kept getting put on the back burner for me that I really wanted to complete. Kit from Glass Jar Audio, the rest from the four corners of the Internet. I've been buying parts here and there for years. I couldn't really get a front design that I liked which...- bhjazz
- Post #4,278
- Forum: DIY (Do-It-Yourself) Discussions
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Bijou All Tube Futterman Headphone Amplifier
I should have taken a pic but all is well. Bijou powered up, all heaters glowing. I then connected the PS (to the amp boards) and saw only 236 but know I just have some adjusting to do. No worries. I just ran out of time. Thanks again SergeyPe and funch for getting me on the right track.- bhjazz
- Post #4,277
- Forum: DIY (Do-It-Yourself) Discussions
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Bijou All Tube Futterman Headphone Amplifier
Yes, parallel. That is the correct wording. Big thanks to SergeyPe and funch (hey there, funch!) Busy weekend day here but I will retest before the day is over. I am confident that this will fix my mis-wired Bijou.- bhjazz
- Post #4,276
- Forum: DIY (Do-It-Yourself) Discussions
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Bijou All Tube Futterman Headphone Amplifier
Also, this: "The ECC99 is a modern tube from JJ. It's based on the 6n6p, but has higher plate resistance." From this post: https://www.head-fi.org/threads/bijou-all-tube-futterman-headphone-amplifier.277541/post-13232195 I am also seeing that the 6N6P does require power to the screen (pin 9)...- bhjazz
- Post #4,273
- Forum: DIY (Do-It-Yourself) Discussions
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Bijou All Tube Futterman Headphone Amplifier
Well, you bring up a good point. There were only two diagrams shown on the cavalliaudio site back in the day, and those were for 6N6P and 6N6Pi. From this thread, I had thought that most people wired the 6N6P the same as the ECC99, but pin 9 of the 6N6P goes to the screen and not the other end...- bhjazz
- Post #4,272
- Forum: DIY (Do-It-Yourself) Discussions
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Bijou All Tube Futterman Headphone Amplifier
I'm going to re-check my heater wiring again, but don't think it's a problem. Here's the heater wiring diagram from Cavalli Audio. (Thankfully I extracted this diagram years back as it is not available any more.) Alex's design reads that the first twisted pair goes to the 6N6P tube heaters...- bhjazz
- Post #4,270
- Forum: DIY (Do-It-Yourself) Discussions
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Bijou All Tube Futterman Headphone Amplifier
Both tubes measure 1.5 Ohm between pin 4 and pin 5.- bhjazz
- Post #4,269
- Forum: DIY (Do-It-Yourself) Discussions
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Bijou All Tube Futterman Headphone Amplifier
My 6N6P tubes seem really dark. As in, I'm not even sure the heaters are powering up. I have checked all diodes on the board, along with every cap and resistor. I even disconnected the power wiring from the PS and checked the heater wiring. All matches Alex's original design. I also checked...- bhjazz
- Post #4,267
- Forum: DIY (Do-It-Yourself) Discussions
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Sourcing alternative Mosfet Transistors
You are welcome. I admit: it is a lot to digest. Unfortunately for us builders, modders and repairers, parts get deleted from product lines and replaced. But I can say that you will likely find a (replacement) part that ticks most of the boxes. When you get to using the alltransistors.com...- bhjazz
- Post #4
- Forum: DIY (Do-It-Yourself) Discussions
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Sourcing alternative Mosfet Transistors
Hi Dantonaudio, Those Toshiba parts are truly difficult to find these days. Hopefully these are a few things to help you along. Get some coffee or tea and read the datasheets for those parts. From what I just read, the "Y" and "O" parts for the 2SJ201 are different, so getting a better...- bhjazz
- Post #2
- Forum: DIY (Do-It-Yourself) Discussions
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Bijou All Tube Futterman Headphone Amplifier
Has it been an entire month? Sheesh. I read, read, and re-read through various items in this thread and dug through what I could extract from the wayback machine version of the Cavalli Audio site. I found my problem: the test load I hung off of the power supply was 100 Ohm, not the 100K...- bhjazz
- Post #4,266
- Forum: DIY (Do-It-Yourself) Discussions
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Bijou All Tube Futterman Headphone Amplifier
Replaced the caps with Rubycons (C1 C4 C5) and also replaced C6. Still smoking. It doesn't start until the output voltage gets up over 20V. Crap. I'll dig back through the thread and review the Regal mods although I seem to remember those were only on the amp boards, not the power supply...- bhjazz
- Post #4,263
- Forum: DIY (Do-It-Yourself) Discussions
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Bijou All Tube Futterman Headphone Amplifier
unrelated content and link removed.- bhjazz
- Post #4,262
- Forum: DIY (Do-It-Yourself) Discussions
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Bijou All Tube Futterman Headphone Amplifier
Mark @ Hammond wrote back, on a Sunday night no less. He said the way I was testing it was completely wrong. Instead, he suggested to test it like this: Using this testing, the transformer checks out fine. I'm crossing it off of the list. Thanks for asking, Eric. The twisted red wires in...- bhjazz
- Post #4,261
- Forum: DIY (Do-It-Yourself) Discussions
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Bijou All Tube Futterman Headphone Amplifier
Email dispatched to Hammond. I had a chat with a fellow DIYer who works on old computer displays, and he feels the transformer has failed. More soon.- bhjazz
- Post #4,258
- Forum: DIY (Do-It-Yourself) Discussions