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Old 31st March 2013, 09:42 PM   #2461
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ok, so i've completed the board according to BOM (my first ever diy electronic project, so i'll be amazed if it works).
i have the R-type transformer but there's no ground - only on the mains side. i only have 0-9V black, black; 0-9Vwhite, white; 0-15V yellow, yellow and 0-15V green, green

1. does the ground on the board get left unpopulated or connected to the chassis or something else?

2. of the coax cable, which should be connected to the gnd, the interior piece of wire or the surrounding wire?

thanks for all help along the way

Last edited by reg66; 31st March 2013 at 09:52 PM.
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Old 31st March 2013, 10:16 PM   #2462
bcmbob is offline bcmbob  United States
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Hope this helps. As I remember there is continuity between the signal and chassis ground. I thought it was an error but has been working fine for months.
Attached Images
File Type: jpg New R.jpg (140.3 KB, 512 views)
File Type: jpg New Ra.jpg (52.7 KB, 497 views)
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Old 31st March 2013, 11:10 PM   #2463
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Quote:
Originally Posted by reg66 View Post
i have the R-type transformer but there's no ground - only on the mains side. i only have 0-9V black, black; 0-9Vwhite, white; 0-15V yellow, yellow and 0-15V green, green

1. does the ground on the board get left unpopulated or connected to the chassis or something else?
You have to create the ground from secondaries...

Click the image to open in full size.
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File Type: jpg IMG_2387.jpg (108.2 KB, 991 views)
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Old 1st April 2013, 10:36 AM   #2464
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cool, thanks. it looks from bcmbob's pic that gnd on the coax is the interior single wire, but it's not too clear. is this right? sorry about all this.
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Old 1st April 2013, 10:43 AM   #2465
hotiron is offline hotiron  Scotland
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No! Ground is the outer core/shield. Centre core is signal.
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Old 1st April 2013, 11:04 AM   #2466
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thanks so much
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Old 1st April 2013, 11:39 AM   #2467
bcmbob is offline bcmbob  United States
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Here is a closeup.
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File Type: jpg New Rb.jpg (30.4 KB, 461 views)
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Old 1st April 2013, 12:18 PM   #2468
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thanks again bcmbob. you guys are really helpful, cheers.
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Old 8th April 2013, 04:17 PM   #2469
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would a phono/RCA socket be the same as a digital coax socket? i've been looking on ebay for a coax socket/connector, but nothings coming up. this is what i'm looking at...NEUTRIK BLUE COLOURED GOLD PLATED NYS367-6 PHONO CHASSI | eBay
if so, i just connect the signal wire to the main rear connector and the outer braid to the sticking out flange, is this right? (apologies for poor terminology, i don't know what things a called)
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Old 9th April 2013, 01:52 AM   #2470
hotiron is offline hotiron  Scotland
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That would do the job nicely. Some people swear by BNC connectors for SPDIF but phono sockets work fine for me.
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