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Post by luckbad on Jan 28, 2019 20:30:03 GMT
I'm going to be putting together a Project Sunrise III and recording the process so others feel more confident in building one. Are there any suggestions for potential upgrade parts? The resistors are already pretty top notch and most of the caps seem to be very good. Would the Nichicon KZ series be a good sub for the input and output caps? Also, what voltage do I njeed? Pretty sure the output is 35v. Are the power caps already KW series? I had a dc input jack go squirrely on me once with either the Horizon or Sunrise and replaced it. Maybe there's a more robust option there? The last thing am thinking about is the volume pot. Maybe this (expensive) TKD 10k potentiometer would do the trick (or the stepped version)? www.partsconnexion.com/TKD-73334.htmlI don't want to actually change the voice of the amp, just wondering if I can spend a little more to get a slightly better version of the same thing. Maybe in the future I could get an auto-bias circuit under there somehow?
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solderdude
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Post by solderdude on Jan 28, 2019 21:46:48 GMT
I am not really fond of the DC input sockets neither. Would require a PCB change to use something else.
Do you plan to use the Sunrise board ?
Jeremy knows which types of caps are used.
The ALPS RK27 also are great potmeters and maybe a bit cheaper.
I know Jeremy is working on a SR/Horizon replacement that has autobias and autoheater select but have no idea how far development is.
Do you want more power out of it ?
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Post by luckbad on Jan 29, 2019 4:02:50 GMT
Yeah, I'm building from his kit and will record the process. I'll probably just stick with the stock parts this go around since I want to help DIY folks who are interested in building one of the amps. If I change any parts it'll just add confusion.
I've been impatiently waiting for the new Sunrise/Horizon combo with auto bias/heater but stopped worrying about it. I'll get the Sunrise again now and the combo if and when it arrives.
Thanks for the reply!
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Post by luckbad on Feb 5, 2019 21:37:05 GMT
I might actually end up mounting this thing into a wooden chassis just for the fun of it.
If I were to panel mount a volume pot, how do I account for the 3 legs vs. 6 sockets in the PCB? Are there 3 for physical support and 3 that are actually in the circuit? Or is it a dual gang and needs the 6 legs?
I don't have the PCB yet to look closely at it.
Basically, my thought is that I'll pull all of the bits like the RCAs, headphone jack, vol pot, power switch, and DC jack and mount those on a chassis, then use wires to connect them to the PCB.
I'll probably line the interior of a wooden box with copper foil tape.
I'm also thinking I'll directly integrate an atomicbob Noise Nuke into the power section in the box itself.
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solderdude
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Post by solderdude on Feb 5, 2019 22:56:33 GMT
The six pins close together are dual gang pots. You will thus need a dual gang pot as well (6 pins) and don't forget to ground the spindle. Keep the wiring of the volpot short or ensure the wiring is shielded. Specifically the wiper (middle pin of the pot)
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Post by luckbad on Feb 9, 2019 21:59:03 GMT
Howdy! I'm building this right now and ran into one snag.
OPT-1
I have a resistor that can go there, but in the manual/instructions it shows that unpopulated. I've also tried to get an idea from looking at pictures, but it looks like on some Sunrise IIIs, it's empty, and on others, it's populated.
Should I put the resistor in there? What is it for?
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Post by luckbad on Feb 10, 2019 3:15:02 GMT
Jeremy answered. Not necessary but not detrimental with the acrylic chassis, but needed for CNC.
Now I can't figure out where the L1 inductor goes. Gonna inspect when I get home. Maybe on the underside?
Edit: No idea how I missed it earlier. Saw it as soon as I got home.
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solderdude
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Post by solderdude on Feb 10, 2019 15:52:52 GMT
yes, with the optional resistor the mounting hole next to it can be connected to the ground plane. A solderblob (as a jumper) is also possible.
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Post by luckbad on Feb 18, 2019 6:15:39 GMT
I decided not to mess with anything for this build video. Later on, I might build a Project Horizon with supercharger and an integrated atomicbob Noise Nuke in a separate chassis (currently thinking about a glass top humidor). Here's the video: youtu.be/CrunyqrxPsc
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solderdude
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Post by solderdude on Feb 18, 2019 17:57:46 GMT
Saw it on SBAF... looks nice !
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Post by luckbad on Feb 21, 2019 6:33:42 GMT
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solderdude
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Post by solderdude on Feb 21, 2019 21:02:27 GMT
Volpot looks great .
Headphone jack.. why not use the one provided with the kit ? that one is gold plated.
The DC jack is 2.1mmm, make sure the power supply is also 2.1 and not 2.5mm
The power switch should be a sturdy one (lots of ampere) , especially on the Horizon as the 48V makes quite a 'flash' inside the switch.
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Post by luckbad on Feb 21, 2019 22:02:02 GMT
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solderdude
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Post by solderdude on Feb 22, 2019 21:56:13 GMT
Yes, it can be mounted on a frontpanel. Provided the panel isn't too thick.
Check the thickness with the Sunrise. The nut should be flush with the front of the screw part (maximum) I believe there are rings under the nut as well so the panel can be a certain thickness.
That switch looks very nice but would go for at least 6A
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