February 15, 201511 yr Thanks Birgir. I am planning to start a mini KGSSHV boards GB. I'll be using the kgsshv16mini.zip for the amp board and kgsshvpsminifinalstn9360.zip for the PSU. Can you confirm if the following board sizes are correct? Thanks! kgsshvampv16mini: 183mm x 99mm kgsshvpsminifinalstn9360: 176mm x 167mm Edited February 17, 201511 yr by mwl168
February 18, 201511 yr I noted an error on the silkscreen for kgsshvpsminifinalstn9360.zip file, the stated STN9360 should be KSA1156.
February 18, 201511 yr I think the kgsshvpsminifinalstn9360 board can accommodate both KSA1156 and STN9360. The STN9360 will need to be mounted vertically while observing the pin out specification. See Kevin's post #4014 in this thread. Although I can use additional clarification about the use of 270V zener with KSA1156. It would be great too if someone can share some insights of the pro and con between the choice of the two devices.
February 18, 201511 yr Anybody try with the amp boards vertical? I have a chassis idea/approach that would utilize this, and it would seem to allow greater airflow over the sinks if anything.
February 18, 201511 yr Anyone have an appropriate part number for the servo cap? Most of the parts I've bought are too wide, and the leads are too thick. I'm making an order to Mouser for some BH stuff but I figured I'd polish this off while I'm at it.
February 20, 201511 yr I think the kgsshvpsminifinalstn9360 board can accommodate both KSA1156 and STN9360. The STN9360 will need to be mounted vertically while observing the pin out specification. See Kevin's post #4014 in this thread. Although I can use additional clarification about the use of 270V zener with KSA1156. It would be great too if someone can share some insights of the pro and con between the choice of the two devices. I don't know if you would parallel the device to limit it to 270V or put it in series with the collector or emitter?
February 20, 201511 yr Author the ksa1156 is a 400 volt device. The 270V zener across it prevents it from blowing up on turn on. You can leave the zener there for the 600v part
February 21, 201511 yr Has this PCB for the carbon been validated to build copies? http://gilmore.chem.northwestern.edu/boards/kgsshvcarbonv1.zip
February 21, 201511 yr Has this PCB for the carbon been validated to build copies? http://gilmore.chem.northwestern.edu/boards/kgsshvcarbonv1.zip I hope so, because I just received mine //UFN PS: Looking at heat sink options for the Carbon at the moment - how much do I actually need?
February 21, 201511 yr Nope, no carbon files have been tested. You have been warned as that one was a rush job. Current is fixed so the voltage is the variable. I won't be going over 400V with this one, same as the Megatron. Edited February 21, 201511 yr by spritzer
February 22, 201511 yr If anyone wants some recent KGSSHV boards, I have two extra sets for the on-board heatsink version. kgsshvamp14mini.zip and almost kgsshvpsminifinal.zip (except it's version 1.0, not 1.1 — I didn't check closely what changed here between the previous final version and the current final version ). Please PM me if you're interested.
February 22, 201511 yr in the kgsshv psu can I get away with a 2W rating for the 15 ohm sense resistors? I was going to use some 3W-rated pulls from a busted supply but there's some soot and possibly cracking on the bodies
February 22, 201511 yr Thermal ratings on resistors are a crapshoot at best (hello Mills!!) so a 2W might work but it also might not. Try it and then measure them...
February 23, 201511 yr Glad I'm no the only who has had trouble with Mills resistors and there blotchy thermal heat dissipation ratings.
February 23, 201511 yr Author looking very nice reminds me of something but i can't remember what it is
February 23, 201511 yr I love the the look as well as well as dual jacks. Edited February 23, 201511 yr by purk
February 24, 201511 yr looking very nice reminds me of something but i can't remember what it is It reminds me of Goldmund preamps. Also the Spectral preamps made in the 90's (I think). Never heard the Spectral but a couple of Goldmund preamps I listened to were very nice sounding gears. Nice build. It looks very slim. Does it use shorter heatsinks or it's an optical illusion? Some interior photos would be great! Edited February 24, 201511 yr by mwl168
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