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?
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?
Attachments
Hi,
Is the 1632 the wrong way 'round?
Appears so from looking at the dot in the component print.
Cheers,
Sebastian.
Is the 1632 the wrong way 'round?
Appears so from looking at the dot in the component print.
Cheers,
Sebastian.
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!
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.
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.
Attachments
Retro lives
I've been running the placid voltage at 15 and shunting 90ma to power the retro. Any advise or is this ok? Gain is lower than the Buffalo/legato when using the soundsmith retipped demon dl-103r. The preamp is at about 2 o'clock with the retro whereas it is at about 10 o'clock with buffalo. Its fine but lower in output. Sounding very good.
I've been running the placid voltage at 15 and shunting 90ma to power the retro. Any advise or is this ok? Gain is lower than the Buffalo/legato when using the soundsmith retipped demon dl-103r. The preamp is at about 2 o'clock with the retro whereas it is at about 10 o'clock with buffalo. Its fine but lower in output. Sounding very good.
Cool.
Last night I dug out my old B&O and dissected it to see what had to be done to use the coils balanced (no ground connection). Turns out, I don't have to do anything. The RCA outputs are connected to the two ends of the coil, no ground, apart from the chassis ground wire. I will get a pair of Retros running tomorrow (at long last).
Last night I dug out my old B&O and dissected it to see what had to be done to use the coils balanced (no ground connection). Turns out, I don't have to do anything. The RCA outputs are connected to the two ends of the coil, no ground, apart from the chassis ground wire. I will get a pair of Retros running tomorrow (at long last).
Perfectly fine
As long as the voltage is not sagging.Very pleased you are enjoying it.
Kewl! I love vinyl!
Yeah, them .3mV cart's need some boost! I like around 60-68dB gain with the low outputs.
I stuck my 103r in an aluminum body. It is made by one of the Lenco forum guys in Hong Kong. I'll planning to try a Ruby Cantilever upgrade from Soundsmith after my Dyna 17D3 wears out.
I went thru all thread and there is something for me that needs clarifying: input load.
http://www.diyaudio.com/forums/twis...al-phono-stage-riaa-filter-9.html#post1985137
Posts #86 and #87.
What is the actual load ? 47k or 94k ? Do we need to place this resistance to ground or between cartridge signal ?
On the other hand - how to setup like 70dB gain ?
http://www.diyaudio.com/forums/twis...al-phono-stage-riaa-filter-9.html#post1985137
Posts #86 and #87.
What is the actual load ? 47k or 94k ? Do we need to place this resistance to ground or between cartridge signal ?
On the other hand - how to setup like 70dB gain ?
