Pars

Yep, watched this one (Black Sails... Thought I had quoted the previous post from4/8) from the beginning season and enjoyed it (mostly). Sorry to see it end. The final season felt a bit compressed and moving too quickly though. Sent from my iPhone using Tapatalk

I haven't built one of these and am not familiar with that particular PSU, but don't you just need a single PSU (dual, which that one appears to be)? Not sure what the other one you refer to is? As for transformer, see the rest of the thread. A dual secondary in the range of 25-27Vac seems to be what is recommended. I posted an Antec AS-0528 above, but an AS-0525 50VA 2x25V might work as well. I'm not sure, but I might be inclined to use a GRLV PSU set for +/-22Vdc for this, with a 2x18Vac transformer. Of course that moves away from a strict clone however. Someone who has built one of these might comment... Sent from my iPhone using Tapatalk

Paid, thanks!

Good one Birgir. What a tool this person is. I don't see any Stax in his headphone inventory... I wonder how he intended to listen to a Carbon?

I've been enjoying listening to this. I decided I wanted to lower the gain, since on more modern hot recordings, the pot was in the 1st quarter of rotation. I changed the 10K resistors to 4.7K, and changed the compensation cap from 10pf to 4pf. Looked fine on the bench including with my load box. I brought it upstairs along with the pair of dynahi boards which just pop right in, and listened to those first. They sounded good. Intending to do a comparison, I put the dynafet boards in. When I plugged the headphones in (10' mogami extension and 10' mogami headphone cables), the protection circuit tripped, and would just keep tripping. Hmm. I determined that the headphone cable and extension alone were enough to do it, without the headphones (T50RP) connected. I took it downstairs along with the cables, and sure enough, oscillation (guess of 70MHz or so based on scope timebase). Amb's zobel networks would keep it from occurring, but lacking suitable resistors, I decided to change how I was reducing the gain. I put the 10K resistors back in, and replaced the 1K with 2K. Now it was fine, so back upstairs it went. I haven't done a proper comparison yet, but still think the FET version sounds better to me. I am going to install the Amb zobels on the board outputs just for safety (47nf cap->22 ohm 2W resistor from output to gnd). Takeaway from this is use a protection circuit (I'm using an Amb e12 modified) use Amb's zobels on the output just in case...

If these are the lt1021 refs, you can buy these direct from linear for quite a bit less than Digikey... Sent from my iPhone using Tapatalk

Happy belated Birthday!

So, any verdict on these? Bonus this year might make me interested. Easy to replace the jacks/recable to make these work well? I liked the LCD-2s of Mike's that I had at home and listened to...

Having the transformer(s) that close to the audio boards/pot probably isn't helping your noise floor at all. AC wiring also appears to be right over the input wiring to the left side of the pic.

Is that shipped or do they want another $8-10 for that? I'd probably try the whining approach, you know, the fucking POS broke Of course they might come back with the ship it in (and pay shipping both ways ) Sent from my iPhone using Tapatalk

Did some work on mocking up the chassis and getting into a more listenable state. I will need to get aluminum top/bottom and rear panels for this (not using the steel ones that it came with). I'm also still a bit concerned with how warm the buffer transistors run, and this is open air. Using a modified amb e12 protector board (with muting). I tested this to see if HF oscillation would trip it, and it did (12V ~70MHz with the feedback set to the mid FB point). Listening-wise, it is likely my favorite amp, even being single-ended. This thing has balls, and seems to open up the recording more than any other amp I have built or used. Since my SE DynaHi boards are a drop-in, I may take another listen to those as well, but from memory, the FET version stomps it. I am going to build up a GRLV for this, and will likely get a 50 or 100VA Antek trafo for it instead of the 120 or 160VA SumR I have in here (a bit in the HC overdo it fashion ).

Interesting build! Nice to see someone do one single chassis also. Appears to be some beefy input wiring!

I'd see if emotiva would send you a couple of them. They are after all the ones who selected them Sent from my iPhone using Tapatalk

Damn, that's a tough one! https://www.aliexpress.com/item/Free-shipping-10pcs-lot-RCA-connector-female-audio-video-jack-one-hole-RCA-108B-4/1760793413.html?spm=2114.40010308.4.39.ZQZdNB Maybe?

Yes, that was a good one, and congrats to Sergio... about time. Sorry Spectrum stepped up to the plate for you

It was mentioned in the group buy thread, but not here. Our bad

The Engineer PA-05 with the crimper looks nice as well. The Ideal strippers that I have are plenty good but these look better. For the price they better be [emoji4] Sent from my iPhone using Tapatalk

Happy Birthday!

Happy belated! Sent from my iPhone using Tapatalk

You can't find it in here? http://bwgroupsupport.com/manuals/bw-service Not to encourage this, BTW. I would read the welcome if I were you.

Happy Birthday Tyler! Sent from my iPhone using Tapatalk

Probably because the tall voice of reason intervened When he gets back to the states, we'll have to pummel him mercilessly...

Yes, very nice work, and love the color! Are those based on Kerry's mini board?

Agreed Stretch. Sent from my iPhone using Tapatalk

Thanks John and Soren, I wasn't going to do my own front panel machining nor the rear panel. I had drilled and tapped blind holes in the heatsinks for the L brackets some time ago. I seem to recall the aluminum being somewhat "gummy", but they turned out fine. This was a few years ago after the DynaFET GB. Sent from my iPhone using Tapatalk