Internal power supply and PSU mod

Discuss Yocto construction and related issues

Re: Internal power supply and PSU mod

Postby xlarge » Aug 10th, '15, 13:40

The upper 15AC will be connected to the D1 anode.

I wonder though; 0v is that connected to 220v GND? (I mean, chassis is connected to gnd and pots and what not will touch schassis).
xlarge
 
Posts: 26
Joined: Feb 11th, '14, 10:10

Re: Internal power supply and PSU mod

Postby gihaume » Aug 10th, '15, 20:53

Thank you for your reply !

xlarge wrote:The upper 15AC will be connected to the D1 anode.


OK, thank you ! I was thinking that would result 15 + 15 = 30 V

I didn't understand the question in your second sentence...
gihaume
 
Posts: 285
Joined: May 12th, '14, 14:48

Re: Internal power supply and PSU mod

Postby xlarge » Aug 11th, '15, 12:23

It will.

You want:
+15V referenced to 0V
-15V referenced to 0V
potential difference is 30V


My question about gnd and 0V was aimed at the originator of this mod. :) I've pm:ed that person to but no answer as of yet.
xlarge
 
Posts: 26
Joined: Feb 11th, '14, 10:10

Re: Internal power supply and PSU mod

Postby jeroenbvo » Aug 13th, '15, 11:45

Hi xlarge,

Sorry for the late reply, I didn't spot the pm... :oops:

So, the 230V gnd will be wired to the chassis. I used one of the mounting screws of the C14 socket. The 0V connection goes also to there via the loop breaker.
See pictures 8-10 on the Imgur album: http://imgur.com/a/IeBch#8

Hope this helps.

Kind regards, Jeroen
User avatar
jeroenbvo
 
Posts: 135
Joined: May 6th, '14, 15:58

Re: Internal power supply and PSU mod

Postby xlarge » Aug 13th, '15, 14:13

Kickass, thanks Jeroen!
xlarge
 
Posts: 26
Joined: Feb 11th, '14, 10:10

Re: Internal power supply and PSU mod

Postby electricmonk » Sep 25th, '15, 18:08

What is the transformer part number (which shop was it bought from) in the original post?
electricmonk
 
Posts: 3
Joined: Dec 8th, '14, 09:25

Re: Internal power supply and PSU mod

Postby Altitude » Sep 27th, '15, 12:33

I used this: http://www.digikey.com/product-detail/en/0/1295-1065-ND

Make sure that whatever you choose has 2 15VAC secondaries and at least 15VA
User avatar
Altitude
 
Posts: 147
Joined: May 28th, '15, 13:01

Re: Internal power supply and PSU mod

Postby jeroenbvo » Sep 28th, '15, 09:47

I ordered my transformer at Reichelt at the time. You need indeed 2x 15VAC with atleast 500mA per secondary.
User avatar
jeroenbvo
 
Posts: 135
Joined: May 6th, '14, 15:58

Re: Internal power supply and PSU mod

Postby deejayraoul » Sep 30th, '15, 06:49

EchoBoy wrote:@deejayraoul: Did you keep the external supply option to make a SNR comparison between external and internal supply?

I did not have time to investigate on my hum issue yet. Sorry Jeroenbvo for not having replied earlier.
In my case the hum is present on all outputs, whether instruments are played or not. This hum also exists with the external supply but >10dB quieter which makes it acceptable.
For now I suspect radiation from the toroidal transformer.

I kept my external power supply, didn;t do any scientific comparison, but it was obvious.
I gues i need to
find a shieldedtransformer (wich would be quie hard as the transformer hardly fits in the metal case at the moment)
ór
find a way to shield this transformer (does anyone know of a safe way/material to do this?)
ór
deal with the noise
ór
go back to the external power supply.
deejayraoul
 
Posts: 48
Joined: Dec 25th, '14, 18:33

Re: Internal power supply and PSU mod

Postby rv0 » Feb 13th, '16, 23:31

i have 2 yoctos here, exact same internal psu, using similar connection like discussed in this topic. one has very loud interference on the congas, the other is a bit less, but its still there.
Listen here: https://soundcloud.com/rvooh/david-yoct ... se/s-tdo8y (I go from LC to MC, then HC, each time i turn tune from min to max)

Doesn't anyone have a working solution for this by now?
Get the latest unofficial Yocto V1 firmware here.
Be sure to check the revised manual.
Leave your comments in this thread.
User avatar
rv0
 
Posts: 184
Joined: Feb 11th, '14, 09:09

PreviousNext

Return to Yocto v1.0 Hardware

Who is online

Users browsing this forum: Google [Bot] and 14 guests

cron