Adam's Paradise

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sq225917
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Joined: Tue Jan 22, 2013 9:28 pm

Re: Adam's Paradise

Post by sq225917 »

Yes, nothing is measurably agnostic, if you look hard enough, there's always some noise to see. But keeping that 120db below signal level isn't hard. My own power amps have over 90db of psrr on the main boards. That's before we factor in the psu boards.
One more Paradise left to complete.
hifiaf
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Re: Adam's Paradise

Post by hifiaf »

The Witch Hat CB HiCap-style dials for my Paradise PSU's power switches have arrived. They're 3D-printed a charcoal colour -- not meant to look exactly like CB HiCap dials, but to look better (in MJS's words!). Well, I think I agree. They look very 3D-printed, but I like the darker colour. And since they're not going on an original CB box, they don't need to be like the originals. (Also, they were way less expensive than the more accurate LOKhifi dials.)

Image

Image

They come with the set-screws preinstalled (good news). The ID of the shaft opening is less than 6mm, so I'll need to drill it out if I'm going to get in the 6.25mm shaft in the switches I found on Mouser. That's an easy job, though...

It looks like the umbilicals and PSU boards have finally been released by Canada customs and will arrive soon. Then I just need to sort out all the details for my last Mouser order and I'll be ready to rock...
sq225917
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Joined: Tue Jan 22, 2013 9:28 pm

Re: Adam's Paradise

Post by sq225917 »

Keep me posted, pics before power up...
One more Paradise left to complete.
hifiaf
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Re: Adam's Paradise

Post by hifiaf »

Don't worry Si, you know me, there will be lots of pics :)

Once the umbilicals etc arrive I'll get things mocked up as well as I can partly just to see if there's anything I'm missing that I haven't thought of...
hifiaf
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Re: Adam's Paradise

Post by hifiaf »

Well, right on cue, package #2 has arrived!

Image


Tonight (or soon) I'll try to put together a list of absolutely everything I still need to order to put it all together... Hoping to be able to make just one more Mouser order. Might be prudent to split it into two orders, though, since inevitably I'll forget something...
sq225917
Posts: 1596
Joined: Tue Jan 22, 2013 9:28 pm

Re: Adam's Paradise

Post by sq225917 »

20 Spades, 23 crimp terminals, 4mm heatshrink. 30x m3 8mm brass stand offs, 50x m3 6mm countersunk a3 stainless screws. 2m decent teflon solid core wire. 4x nuetrik rca panel sockets, 2x neutrik rear rca sockets, half a dozen neutrik rca plugs, 1x speaker/gnd post.

And whatever else from mouser, caddocks?
One more Paradise left to complete.
hifiaf
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Re: Adam's Paradise

Post by hifiaf »

Okay, got distracted for a couple of days there attending to my self-muting 135. Hopefully that's sorted... I won't convince myself until I've listened to music ear-splitting volume for a full twelve hours — hard life! I'm about 8 hours in at this point and it has been very fun!

So this is mostly me thinking out loud to help me organize all the stuff I need for my Paradise build. But I'd really appreciate kind souls looking this over to make sure it makes sense, and there's some stuff at the end that I need help with (probably from Si and Mark).

I'd like to place my final Mouser order by tomorrow night so that I can have everything in hand for the weekend. It would be pretty exciting to get everything built up so soon...

Here is what Si sent me:

-- 2 x completed main boards
-- 2 x HackerCAP PSU boards
-- 2 x transformer boards
-- 2 x power umbilicals
-- wiring harnesses for main boards and PSU
-- spare LEDs (same as on main boards, to be used for power indicator)
-- 4 x 2-pin terminals for attaching the power resistors to the PSU boards (not sure how this works yet...)
-- 2 x 100k resistors (Calvin set resistors, I believe)

Here's what I've already ordered:

PSU:
-- 12 x big caps for PSU https://www.mouser.ca/ProductDetail/cor ... cycode=CAD
-- 8 x rectifiers for PSU https://www.mouser.ca/ProductDetail/pow ... cycode=CAD
-- 4 x Hammond 158T rectifiers https://www.mouser.ca/ProductDetail/ham ... cycode=CAD
-- 2 x RS toroidal transformers https://uk.rs-online.com/web/p/toroidal ... s/6719084/

Main:
-- 4 x Neutrik RCA sockets (2 red, 2 black) https://www.mouser.ca/ProductDetail/neu ... cycode=CAD
-- a whole bunch of metal film resistors for cartridge loading (accidentally ordered only one of each, argh) https://www.mouser.ca/ProductDetail/vis ... cycode=CAD

Tools etc:
-- 4-22mm stepped drill bit https://www.amazon.ca/gp/product/B082ML ... UTF8&psc=1
-- bunch of files https://www.amazon.ca/gp/product/B086C2 ... UTF8&psc=1
-- coping saw https://www.amazon.ca/gp/product/B000B3 ... UTF8&psc=1
-- 100 x M3 6mm countersunk screws https://www.amazon.ca/gp/product/B0713Q ... UTF8&psc=1
-- countersink drill bits https://www.amazon.ca/gp/product/B01951 ... UTF8&psc=1


Here is what I know I still need to order:

PSU:
-- 4 x TDK fixed inductors https://www.mouser.ca/ProductDetail/871-B82724J8162N040
-- 12 x WIMA Film Capacitors 250V .1uF 5% https://www.mouser.ca/ProductDetail/505-MKP20.1-250-5
-- 2 x Caddock power resistors 50 ohm 30W 1% https://www.mouser.ca/ProductDetail/684-MP930-50
-- 2 x rotary switches https://www.mouser.ca/ProductDetail/611-A10214MNCQE
-- 2 x IEC inlet with filter https://www.mouser.ca/ProductDetail/631-FN9262B-10-06

Main:
-- 2 x SIL sockets for RCA-less cartridge loading if I want to go that way https://www.mouser.ca/ProductDetail/855-D2899-42
-- One more of each of the loading resistors I already ordered :(
-- binding post for ground wire (these are cheap, only need one) https://www.partsconnexion.com/CONNEX-53466.html#35605 (And I just need ONE, right, not one for each channel?)

General:
-- Neotech 24awg solid core hookup wire https://www.partsconnexion.com/NEOTECH-79412.html#40993 This is for input and output from main boards. Solid core because it's easy to twist and strip -- downside is that it becomes brittle after soldering. Is twisting enough for low level input signal? I don't want shielded wire?
-- 1/8" heat shrink https://www.partsconnexion.com/HSHRINK-64091.html
-- 20 x spades https://www.mouser.ca/ProductDetail/571-726386-2
-- 23 x crimp terminals https://www.mouser.ca/ProductDetail/571-6-160526-1
-- 30 x M3 8mm brass standoffs (should these really be $1 each?) https://www.mouser.ca/ProductDetail/534-24402 -- Amazon has a 300 pcs kit with 30 M3 8mms for $23... https://www.amazon.ca/Standoffs-Waterpr ... ljaz10cnVl


Stuff I'm not sure about and need help with:

-- R-CR filter for PSU. 2 x 82 ohm resistor (which one? How many watts?), 0.15uf film cap (which one?)) 0.01uf cap (10n) (which one)? [Edit: I actually needed FOUR of each of these. Whoops.]
-- Film cap for the loading resistor. 1000pf 5% 630V I believe. What size or brand?
-- 10 ohm resistor to “lift earth”?
-- Do I need something more than the two 50ohm Caddock power resistors? Will I not know until I fire everything up?
-- Should I get some kinds of terminals/screws for things like attaching AC earth to the case?
-- Mounting the rubber feet: I have a set of metric taps. I can just use these to put a thread in the sled, right, and then put a proper metric bolt through the rubber feet? M5 bolt?
-- Do I need something to hold the power LEDs to the front of the sled? The Paradise board LEDs are pretty small; should I get some regular-sized ones as a backup? Maybe white or gold for properly paradise-like aura?
-- Will any wire do for connecting the switch to the IEC inlet? Particular gauge or type preferred?
Last edited by hifiaf on Sun Aug 09, 2020 6:05 am, edited 1 time in total.
Joe
Posts: 47
Joined: Tue May 05, 2020 12:21 pm

Re: Adam's Paradise

Post by Joe »

For the M3 standoffs try Ebay......I realise you are in Canada ( is that right ? ) but there must be deals iike this over there.......


https://www.ebay.co.uk/itm/M3-BRASS-HEX ... Swklhc8v9m
Last edited by Joe on Fri Jul 31, 2020 7:20 am, edited 1 time in total.
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YNWaN
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Re: Adam's Paradise

Post by YNWaN »

“-- Should I get some kinds of terminals/screws for things like attaching AC earth to the case?”

Well you need to decide if you are talking about AC mains or signal ground. The AC inlet you are thinking of looks like it is self grounding via its metal body (mine are) and don’t require a separate ground for mains.

“-- Mounting the rubber feet: I have a set of metric taps. I can just use these to put a thread in the sled, right, and then put a proper metric bolt through the rubber feet? M5 bolt?“

My feet are mounted with M4 and the head on an M5 doesn’t easily fit in the foot (as I recall). Also, I think you would need M6 if you were intending to use the existing holes in the sled. My own case feet are actually threaded to the 5mm acrylic sub-layer inside the case and just pass through the holes in the sled (which are too large).

“-- Do I need something to hold the power LEDs to the front of the sled? The Paradise board LEDs are pretty small; should I get some regular-sized ones as a backup? Maybe white or gold for properly paradise-like aura?”

There are two common ways to mount an LED, either use a clip in LED bezel or a dab of glue on the rear. You can’t just swap around the LED’s on the board and you won’t need to replace any. Likewise, you can’t change their colour as different colours have different voltages ( https://electronicsclub.info/leds.htm) and they are actually there because of their electrical characteristics - the fact they also give off light is irrelevant. If you are fitting a power indicator LED you need to think carefully how it’s actually going to be powered..... and what compromise may be involved.

“-- Will any wire do for connecting the switch to the IEC inlet? Particular gauge or type preferred?“

Presumably the full mains has to pass through the switch so would use the same wire used in whatever mains cable you intend to use. I’m not suggesting you should use anything particularly exotic though - personally I use Belden 19364. However, any decent stranded copper wire will do as long as it’s not too thin.
Mark
hifiaf
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Re: Adam's Paradise

Post by hifiaf »

Thanks, Mark!

On the LEDs: Si’s PSU boards do have provision for for power LEDs, as well as a spot for a resistor to adjust the brightness. I’m not planning on using any kind of illumination on the main boxes at the moment.

And I'm certainly not intending to switch the LEDs on the Paradise board -- I just meant that Si sent me some extras of the same kind to use as power indicator LEDs...

And thanks Joe for the lead on standoffs on eBay.
Last edited by hifiaf on Thu Jul 30, 2020 1:52 pm, edited 2 times in total.
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