Miscellaneous Discussions Off Topic (OT) items that really don't fit into any other Category |
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Thread Tools | Display Modes |
#471
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The heat sink came with the board. I picked the Meanwell switching supply because It had a good reputation for low/no RFI and there didn't seem to be any reason not to use a switcher. The $30 price was a boon, too. It also seems to be the right power supply for the preamp upgrade coming next.
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Ed Devinney ::: phase 1: collect the underpants. Purcellville 993 + Boxster S + Eurovan MV + 4Runner + Volvo 122 Last edited by edevinney; 05-24-2020 at 08:46 PM. |
#472
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Very cool! I just ordered a case to enclose the TPA3251EVM-175W board and meanwell PS I bought a year or so ago. Will be the amp for the bedroom setup.
The Korg tube is pretty neat. Will add some tubey flavor as a preamp. Looking forward to impressions.
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Kyriakos E. Stylianos Baglama inspired 1982 SC Targa - (Currently Wallowing for GothingNC) |
#473
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Please share when you get it going, I dont understand what makes it work but the results are just too cool.
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78 SC, the 'Red Car' |
#474
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That's some else's pic, still waiting on parts from a group buy but I'll definitely report back.
I have a couple of regular Pass B1 boards and enjoy them, am hoping the Korg can help with the slight shoutiness of some female vocals that comes through the chipamp. Aretha deserves Respect.
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Ed Devinney ::: phase 1: collect the underpants. Purcellville 993 + Boxster S + Eurovan MV + 4Runner + Volvo 122 |
#475
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So far, so good: board populated, no smoke on startup, voltages stable at the test points and bias set to Mr Pass's baseline. Sounds very good, have to spend some time listening carefully later.
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Ed Devinney ::: phase 1: collect the underpants. Purcellville 993 + Boxster S + Eurovan MV + 4Runner + Volvo 122 Last edited by edevinney; 07-09-2020 at 03:47 PM. |
#476
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Nice, Ed. I need to do a build. I picked up a pair of free, mint ADS L620s a few weeks back. They don’t need a lot of power.
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John B 79 930 87 951 (sold/engine in wrong end) 86 911 Targa (sold/missed) |
#477
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Oh, you should - this has been fun, not terribly expensive, and definitely rewarding.
Having listened to this combination for a couple of hours now, I'd recommend the preamp. Adds a nice bit of ambience and soundstage vs the B1 buffer, with the same lovely detail. Aretha and Sister Rosetta Tharpe seem to like it, too. The only down side is that the tube is microphonic, so it turns outside sound into electrical sound. You really need to put the preamp in a sturdy, closed case to keep out vibration or it rings like a bell. More than you'll ever want to know here: https://www.diyaudio.com/forums/pass...rg-triode.html Spent the evening spec'ing out a case and front panel, which will be the largest single cost of the whole thing. Rough total (I reused some parts like the volume pot) about $625: $70 3e TPA3251 board $30 Power supply $30 preamp board and JFETs $50 Korg NuTube $75 other preamp parts $100 front panel w/machining $180 case
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Ed Devinney ::: phase 1: collect the underpants. Purcellville 993 + Boxster S + Eurovan MV + 4Runner + Volvo 122 |
#478
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FM Tuner recommendations
My inexpensive but good sounding tuner has apparently died. I am looking for recommendations for a replacement.
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Harleigh (ex-'60 356B Roadster, '70 914-6, '85 911, '94 968, 2012 Cayman R) |
#479
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Price range?
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David D. '87 Targa - 2021 quickly disappearing... |
#480
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Harleigh (ex-'60 356B Roadster, '70 914-6, '85 911, '94 968, 2012 Cayman R) |
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