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Old 19th March 2011, 08:19 PM   #121
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Default Retro

Ok so thanks to Brian and Russ I have wima caps that fit the board better. They also sent a pair of the opa 1632 to replace the 1623 I ordered by mistake. But I have no sound! I have no doubt installed the IC wrong but I have looked at datasheets and cant figure out what I did wrong. The dual placid bp are at 15v and 250ma. I am using the output as SE (rca) for now. I have the denon dl103r + to the + in and the earth to - into the boards. Out of the board is + signal to center pin of rca and the ground out to the ground of the rca. Heres a pic of the ICs. Any idea what I did wrong?
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Old 19th March 2011, 09:14 PM   #122
sek is offline sek  Germany
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Hi,

Quote:
Originally Posted by bikerboy View Post
Any idea what I did wrong?
Is the 1632 the wrong way 'round?
Appears so from looking at the dot in the component print.

Cheers,
Sebastian.
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Old 19th March 2011, 09:22 PM   #123
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Yes the OPA1632 looks to be in backward.
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Old 6th May 2011, 09:21 PM   #124
konga is offline konga  United States
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Any updates or impression yet? Will the Retro be offered on the TPA site eventually?
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Old 13th January 2012, 05:20 AM   #125
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Hi!

Just wondering what happened to the Retro project?

Taz.
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Old 1st January 2013, 05:46 PM   #126
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Default Retro lives

I was able to fix the Retro with the help of a chisel tipped iron! I bypassed the $3 caps with some soniccraft 0.1 uf caps. Sounds good so far. A bit of hum, what can you expect in the open air!
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Old 1st January 2013, 05:48 PM   #127
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Quote:
Originally Posted by bikerboy View Post
I was able to fix the Retro with the help of a chisel tipped iron! I bypassed the $3 caps with some soniccraft 0.1 uf caps. Sounds good so far. A bit of hum, what can you expect in the open air!
Very cool!
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Old 2nd January 2013, 01:24 AM   #128
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Talking Retro lives

I used a longer board and gave the boards more room. I also twisted the transformer leads and made a steel cover. Definitely reduced the hum. I think I will order soniccraft caps for c1 and c2. Are there other parts worth looking at for upgrades? It sounds very nice and balanced. Thanks for the great TPA gear. Now I need a preamp with 2 xlr inputs.
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Old 2nd January 2013, 01:30 PM   #129
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Nice! I forget - which version did you build?

EDIT: NM I see now that it is the Hi-Z :
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Old 2nd January 2013, 03:49 PM   #130
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I have parts on hand for a few of these kits (~15 I think). They will use Dayton Audio MKP caps (1uF and 3uF). If anyone is interested...
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