I'm flattered...
thank you all.
@ brianco, indeed have i thought about making a cover from glass or acryl
but thats undermining the idea of an open structure.
there is nothing hazardous or fragile to touch.
I'd consider most tubeamps more endangered to brute force
but most of'em show their precious bulbs freely.
so what? using a soft brush now and then will do it.
thanksanyway
cheers
A.
thank you all.
@ brianco, indeed have i thought about making a cover from glass or acryl
but thats undermining the idea of an open structure.
there is nothing hazardous or fragile to touch.
I'd consider most tubeamps more endangered to brute force
but most of'em show their precious bulbs freely.
so what? using a soft brush now and then will do it.
thanksanyway
cheers
A.
FE is part of speciall flavor , no doubt
I know it depends of taste , but with nootoobe I believe there is too much of good thing
maybe it could be better driving Babelfish M25 , that one having much lower THD , even if spectra is the same
btw. - Fugly!
🙂
@ asanden, nice and tidy build and not your first telling from the pic.
is the heatsink midamp only for rectifiers or do you hide some regulator?
btw: do you drive your LX-minis+ with M2 and/or sissysit? (low SPL?)
cheers!
A.
is the heatsink midamp only for rectifiers or do you hide some regulator?
btw: do you drive your LX-minis+ with M2 and/or sissysit? (low SPL?)
cheers!
A.
Thx, indeed not my first amp, hopefully the last (although I am curious for Nelson’s new design to his month at Burning Amp)
The LXmini is a good reason to build amps... want to drive the subs with class D ... the others; I have still have to test and try my options; M2, s-sit, VFET2, tubelab TSE
The heat sink is overkill for only the diodes, but I underestimated the dissipation on them once...
The LXmini is a good reason to build amps... want to drive the subs with class D ... the others; I have still have to test and try my options; M2, s-sit, VFET2, tubelab TSE
The heat sink is overkill for only the diodes, but I underestimated the dissipation on them once...
Quote:
...... but I underestimated the dissipation on them once...
Quote:
isn't that familiar ......
That darn thing(M25) idles at 52.4°C with 19°C ambient (5 hours after turnon)
that's the downside of fat alu...
...maybe i lower the bias...
A.
...... but I underestimated the dissipation on them once...
Quote:
isn't that familiar ......
That darn thing(M25) idles at 52.4°C with 19°C ambient (5 hours after turnon)
that's the downside of fat alu...
...maybe i lower the bias...
A.
Glad you got your cinemags. I got mine too but noticed some gaps in the laminations.
I called David he said it was no big deal. Do your transformers have lamination gaps?
Still waiting for SissySIT boards judging by the Zen mod traffic and BAF travel it looks like 2020 will come before the boards
I called David he said it was no big deal. Do your transformers have lamination gaps?
Still waiting for SissySIT boards judging by the Zen mod traffic and BAF travel it looks like 2020 will come before the boards
Some progress since my last update.
With lots of help from Song, we managed to get amp up. I managed to bias the right channel but did not have any luck with the left. No matter how I turn the IQ or DC offset, I can't bring these 2 parameters down.
Song suspects a broken 7805 or the opto. I run out of light to troubleshoot, will have to wait a bit as I am out of town starting tonight.
In the meanwhile, any thoughts what else might be broken?
With lots of help from Song, we managed to get amp up. I managed to bias the right channel but did not have any luck with the left. No matter how I turn the IQ or DC offset, I can't bring these 2 parameters down.
Song suspects a broken 7805 or the opto. I run out of light to troubleshoot, will have to wait a bit as I am out of town starting tonight.
In the meanwhile, any thoughts what else might be broken?
@dewdrop - gorgeous looking build so far.
re: what else? It's not likely related to the issue you're dealing with at the moment, but I don't see the 100R flying resistor off of the SITs back to the boards. See attached.
re: what else? It's not likely related to the issue you're dealing with at the moment, but I don't see the 100R flying resistor off of the SITs back to the boards. See attached.
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