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Old 28th May 2013, 09:21 PM   #2441
troystg is offline troystg  United States
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Quote:
Originally Posted by gerben00 View Post
And i soldered everything upside down..;-) Can't change the pics it seems.
You sure you're not in Oz?
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Old 29th May 2013, 12:16 AM   #2442
rjm is offline rjm  Japan
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Quote:
Originally Posted by gerben00 View Post
I now solved it with dip sockets
I deliberately left the options open. You can solder the resistors to the board, you can use standoffs (recommended), or pins, or sockets. In principle you can even run wires to a daughterboard or panel switch, though I don't know how well that would work out in practice.

The only problem with chopped up DIP sockets is the resistor leads are often too thick to properly fit.
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Old 29th May 2013, 11:48 PM   #2443
Bibio is offline Bibio  Scotland
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well so far so good. wired everything up and nothing has gone pop or burning. still got a few things to wire up but all in all it's done.

next stage is testing.

one weird thing though, i have 4 LED's 2 inside the power supply running off the unregulated DC and 2 in the 'phonophone' (phonoclone and sapphire) running off the phonoclone regulated outputs on the boards. when i switch the power on the LED's are nice and even coloured but in about 10 seconds the power supply one gets washed out. if i turn everything off and unhook the power supply from the 'phonophone' the power supply returns to normal colour and does not wash out.

any ideas as to why the LED's are acting up?
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Old 30th May 2013, 12:58 AM   #2444
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Overheating LED? What value resistors are you using? You may try increasing the value somewhat.
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Old 30th May 2013, 02:20 AM   #2445
Bibio is offline Bibio  Scotland
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yup resistors are to small and scorching.. lol

well i plugged everything up and nada.. nowt :-(

i'm going to have to go over my wiring me thinks.
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Old 1st June 2013, 02:10 AM   #2446
Bibio is offline Bibio  Scotland
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update.

phonoclones are working which means the power is working :-)

sapphires i'm still having trouble with :-(

i have wired it up:

phonoclone out+ to in of volume pot
phonoclone out- to gnd of volume pot plus gnd of volume pot to sapphire in-
out of volume pot to sapphire in+
sapphire out +/- to headphone socket

i'm testing with cheep crappy headphones (16ohm i think) and the volume pot is 50k

half way there. lol
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Old 1st June 2013, 03:12 AM   #2447
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Even with sacrificial headphones, the "is this thing on!?" method of fault analysis is not recommended.

Once passed the smoke test, the next step is to check all the voltages you can think to check. Only then should you be thinking about hooking it up and passing a signal.
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Old 16th June 2013, 10:55 PM   #2448
JZatopa is offline JZatopa  United States
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Has anyone here ever had the opportunity to hear both the Tetra phono preamp and the VSPS 300 back to back? These seem to be the two most popular RIAA kits online but it's hard to find much feedback comparing them.
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Old 22nd June 2013, 01:33 AM   #2449
rjm is offline rjm  Japan
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The tetra phono preamp is a passive EQ tube phono stage, like this one of mine, but with additional followers on the input and output stages. Fairly standard, solid implementation.

The tetra should sound like a typical well-designed tube phono stage, The VSPS300 should sound like a typical well-designed solid-state phono stage.
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Old 22nd June 2013, 03:39 AM   #2450
Carlp is offline Carlp  United States
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Good luck getting a Tetra though. It's been out of stock for most of the last year or two.
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