Definitely reflow from the back.
Eros 2 Build [resolved]
- Thread starter David L Efford
- Start date
David L Efford
New member
Still sounds like shI*, here are the voltages as of reflowing the C4S board:
1A - 218.5 VDC
1B - 219.1
OA - 155.8
OB - 160.2
OC - 98.0
OD - 98.0
OKA - 98.7
OKB - 98.7
OKC - 1.53
OKD - 1.50
PB, I'm flustered but thanks for sticking with me through this, DLE
1A - 218.5 VDC
1B - 219.1
OA - 155.8
OB - 160.2
OC - 98.0
OD - 98.0
OKA - 98.7
OKB - 98.7
OKC - 1.53
OKD - 1.50
PB, I'm flustered but thanks for sticking with me through this, DLE
Larpy
Member
Given your voltages, I wonder if the issue is the bias of the 6922 tube. I had a problem with my Eros2 sounding bad for no reason I could account for, and Paul Joppa eventually diagnosed the problem as the bias of the 6922 tube. The Eros needs at least a 1.5v difference between OC/D and OKA/B. Less than that and you get distorted sound.
I was unable to fix mine. It's in the cue to go to PB for repair.
I was unable to fix mine. It's in the cue to go to PB for repair.
Larpy
Member
Scroll down a few posts to see PJ's take on my unhappy Eros.
https://forum.bottlehead.com/index.php?topic=15304.30
https://forum.bottlehead.com/index.php?topic=15304.30
When I take these on for repair, typically it's a matter of reflowing solder joints, and an occasional mistake. It's tough to offer a whole lot more than that. Occasionally I see a dead 6922 that will cause similar issues to what you have, but swapping that tube hasn't yielded much in the way of results.
David L Efford
New member
PB, in your opinion is the problem most likely in the C4S board? I played my turntable directly in to my S.E.X last night and it was great, is the problem in the output of my table? Does my turntable already have a pre-amp in it, its a Audio-Technica AT-LP120XUSB?
Paul Joppa
Moderator
Yes, that TT has a phono preamp built in. There is a "phono/line" switch on the back. Set it to "Phono" to bypass the built-in preamp and use the Eros instead. (Set it to "Line" to direct connect the TT to the S.E.X. amp. See the downloadable manual on page 8.)
David L Efford
New member
Well Damn, I been chasing stupid. All's well in the South, Thanks a million and the Eros sounds amassing.
Paul Joppa
Moderator
LOL :^)
On the plus side, you did eventually identify the real problem!
On the plus side, you did eventually identify the real problem!
Mucker
Member
Paul Joppa said:
That seems a little backward. Shouldn't the switch in the "phono" position mean the preamp (with RIAA correction) is engaged. And when in the "line" position, just the unaltered signal (no RIAA) which would then require an external phono preamp?
These labels can indeed be confusing sometimes. If indeed that is the way, I too would have done it the same way as David. But, yeah the manual is usually (but not always) the correct way.
