Ariamella Posted November 30, 2017 Report Posted November 30, 2017 Would a couple of the Salas SSLV 1.1/BIB be fine for powering the Dynahi or is the S22/GRLV a better choice?
kevin gilmore Posted November 30, 2017 Report Posted November 30, 2017 shunt regulator for more than 1 amp and 30v, probably a very bad idea without massive heatsinks and really large pass devices B22 also struggles with this due to high voltage differential. I.e. lots of heat
Pars Posted November 30, 2017 Report Posted November 30, 2017 I know the Salas stuff is well thought of on diyaudio. Normally a balanced Dynahi would use two GRLVs. I don’t think Kevin is a proponent of shunt regulators but I’ll let him weigh in.I am planning on building Salas’ Simplistic phono stage but was going to use a GRLV plus PSU (or maybe dual mono GRLV plusses) for this instead of the included Salas shunt. I did my own board layout with the phono only.The GRLV is very low noise.Sent from my iPhone using Tapatalk
Ariamella Posted November 30, 2017 Report Posted November 30, 2017 Oops I meant S22, not B22 Also, I plan to use two bipolar ones, one for each board, with each side rated at 300mA output/500mA input current. Definitely won't be 1A going through each one. How would that change things? Mainly just looking for a cost-effective and compact solution, really. Also, if I were to go for the GRLV, where would I be able to get boards for it?
sbelyo Posted November 30, 2017 Report Posted November 30, 2017 It's possible someone may have some GRLV boards left to spare. If you can't find a pair I was thinking of starting another group buy for them 1
Ariamella Posted November 30, 2017 Report Posted November 30, 2017 That would be pretty great! I asked over in the GRLV thread too, just in case.
Ariamella Posted November 30, 2017 Report Posted November 30, 2017 Oh no, it's hitting me as to just how expensive both the GRLV and Salas BIB PSUs will be when fully stuffed...are there any other options for cheaper but still effective ones? Would, say, an LM317/337-based PSU give decent performance?
kevin gilmore Posted November 30, 2017 Report Posted November 30, 2017 trying to build a ssdynahi on the cheap, probably not a good idea.
Helium Posted December 1, 2017 Report Posted December 1, 2017 (edited) 14 hours ago, Pars said: I am planning on building Salas’ Simplistic phono stage but was going to use a GRLV plus PSU (or maybe dual mono GRLV plusses) Sent from my iPhone using Tapatalk I may be missing something, what is GRLV plus? Edit: I mean GRLV vs GRLV plus. Edited December 1, 2017 by Helium
kevin gilmore Posted December 1, 2017 Report Posted December 1, 2017 grlvplus and grlvminus are the singles split off the original board
Ariamella Posted December 1, 2017 Report Posted December 1, 2017 Ok, crunch time, time to decide which PSU to use! I've settled for either the GRLV or the Salas SSLV1.1/BIB. Both of them seem to cost about the same amount of money to make, so I'm having difficulty deciding which one to go for...
MASantos Posted December 1, 2017 Report Posted December 1, 2017 On 30/11/2017 at 5:34 PM, Pars said: I know the Salas stuff is well thought of on diyaudio. Normally a balanced Dynahi would use two GRLVs. I don’t think Kevin is a proponent of shunt regulators but I’ll let him weigh in. I am planning on building Salas’ Simplistic phono stage but was going to use a GRLV plus PSU (or maybe dual mono GRLV plusses) for this instead of the included Salas shunt. I did my own board layout with the phono only. The GRLV is very low noise. Sent from my iPhone using Tapatalk I remember Salas saying how having the reg on the same board as the phono was a big influence on the great sound of the FSP. You could use the GRLV before the shunt, some people used a jung super reg as a "pre regulator" for the integrated shunt.
Ariamella Posted December 1, 2017 Report Posted December 1, 2017 49 minutes ago, MASantos said: I remember Salas saying how having the reg on the same board as the phono was a big influence on the great sound of the FSP. You could use the GRLV before the shunt, some people used a jung super reg as a "pre regulator" for the integrated shunt. Hm that could work at some point, but I doubt I'd be able to afford both of them at the moment...:p
Ariamella Posted December 2, 2017 Report Posted December 2, 2017 (edited) Maybe I'm blind...but I can't seem to find the dimensions for the offboard ss dynahi PCB. Does anyone happen to know them? EDIT: And maybe the GRLV too. I'm currently doing a layout plan on google sketchup so it would help to have those dimensions handy! Edited December 3, 2017 by Ariamella
Pars Posted December 3, 2017 Report Posted December 3, 2017 On 12/1/2017 at 3:45 PM, MASantos said: I remember Salas saying how having the reg on the same board as the phono was a big influence on the great sound of the FSP. You could use the GRLV before the shunt, some people used a jung super reg as a "pre regulator" for the integrated shunt. I would guess this is because he lays out the sense lines on the board going right to the rails on the phono section. I would think if you ran not only V+ and gnd, but also both sense lines separately, having the reg onboard wouldn't make a difference (shunt PSU only). The GRLV is extremely low noise (see thread for screen room measurements), so I am hoping that just using GRLV (or dual mono) will be as low noise, maybe lower, than the shunts are. I did lay out his shunt on a separate board which would fit just like his single board, but have very short jumpers to the phono board, in case I think I am wrong.
gepardcv Posted December 4, 2017 Report Posted December 4, 2017 @Ariamella: I pulled the following numbers from the Gerbers, and I think they match the produced boards: - ssdynahibalsmtm.zip: 215.9×115.3mm - goldenreference6.zip: 93.3×109.9mm
Ariamella Posted December 4, 2017 Report Posted December 4, 2017 (edited) 2 hours ago, gepardcv said: @Ariamella: I pulled the following numbers from the Gerbers, and I think they match the produced boards: - ssdynahibalsmtm.zip: 215.9×115.3mm - goldenreference6.zip: 93.3×109.9mm Thank you very much! Is that the newest SMT version of the dynahi? Sorry to be a bother but do you happen to know what the dimensions are for the V1 Susy Dynahi boards are? Edited December 4, 2017 by Ariamella
gepardcv Posted December 4, 2017 Report Posted December 4, 2017 (edited) Yeah, those are the numbers from the Gerbers I used for my boards. SMT and MJE output sand. No idea about sizes for any older revisions, but if you get me the Gerber for it, I could try to figure it out for you. Edited December 4, 2017 by gepardcv
Ariamella Posted December 4, 2017 Report Posted December 4, 2017 5 hours ago, gepardcv said: Yeah, those are the numbers from the Gerbers I used for my boards. SMT and MJE output sand. No idea about sizes for any older revisions, but if you get me the Gerber for it, I could try to figure it out for you. Ok, thank you anyways! The older revisions are probably close enough that the case I plan to use can fit them all...
penmarker Posted December 14, 2017 Report Posted December 14, 2017 I have this current board. Is it possible to replace MPSW56/06 with MPSA?
ruslanch Posted December 16, 2017 Report Posted December 16, 2017 On 16.11.2017 at 6:40 PM, kevin gilmore said: and then things like these for the pins https://www.ebay.com/itm/2-x-2-54mm-Male-40-Pin-Round-Header-Strip-Gold-Plated/161735709722?hash=item25a833141a:g:ehIAAOSw3xJVf2RC i'm sure there is a mouser part number, but can't find it Where can I find gerber for lsk489/lsj689 pcb? Thanks!
spritzer Posted December 16, 2017 Report Posted December 16, 2017 I've ordered some of them but no time to test as of yet...
Ariamella Posted December 19, 2017 Report Posted December 19, 2017 Do the other specs of the LED matter or is it only the forward voltage (1.7V) that is important?
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