i'm on a roll... the kgsshv

[kevin gilmore]

http://gilmore.chem.northwestern.edu/kgsshv.xlsx

[Lil' Knight]

Dr Gilmore,

May I know the lead spacing of the 0.1uf/1000v, 100uf/450v and 680uf/450v caps on the PCB?

[luvdunhill]

Dr Gilmore,

May I know the lead spacing of the 0.1uf/1000v, 100uf/450v and 680uf/450v caps on the PCB?

the info is in the BOM. Simply look up the listed part and check its spacing and go from there.

[spritzer]

Yup, it's all in the BOM but the 0.1uf/1000V has dual footprints to accommodate me and my cap collection.

[Craig Sawyers]

Yup, it's all in the BOM but the 0.1uf/1000V has dual footprints to accommodate me and my cap collection.

Good - that means that I can use up the excess of large footprint ones I bought in error for the T2

[spritzer]

Not unless they have a 15mm pitch...

[kevin gilmore]

15mm or 22.5 mm pitch for those caps.

[Lil' Knight]

Thanks!

the info is in the BOM. Simply look up the listed part and check its spacing and go from there.

Just want to make sure because originally, the BOM was made by struts and I'm not sure if he had the right lead spacings. http://www.head-case.org/forums/do-yourself/8452-im-roll-kgsshv-5.html#post380076

[charlo89]

hello,

I just happened on this topic, and I am very interested in the KGSSHV. I already built an amp, an Amb M3.

But here the high voltage scares me, so I wonder if a version of KGSSHV finished, will be on sale. Or I could manage with someone to build me a kgsshv

Sorry if my english is not perfect but I am not yet a perfect biligual.

[MASantos]

Where do you live?

[wink]

I must have missed something.

In the new BOM there is no OP27GPZ

Is it an omission or a new circuit that omits it?

[ujamerstand]

You've missed the new power supply that doesn't need the opamp.

[MASantos]

So is this the final BOM?

[spritzer]

Should be, unless there are problems with it.

[livewire]

Heh,

I was perusing the BOM (but not with my fine tooth comb)

and found a couple of things that could stand to be corrected.

Line items 30 and 31 should have the comment "either this or this".

Line item 33, LED's, quantity should be 8 each.

[Lil' Knight]

Are these supposed to be the latest rev? There are some caps that I didn't see in the BOM.

amp http://gilmore.chem.northwestern.edu/kgsshvproduction.jpg

psu http://gilmore.chem.northwestern.edu/kgsshvps7c.jpg

[kevin gilmore]

I'll fix the led quantity thing much later today. There were 7 or 8 other errors i found and

fixed yesterday as i was ordering parts.

I've ordered all the parts i can from mouser, should be in by friday.

Will order the rest of the parts from digikey.

Those are the latest schematics, the only part that does not show up should be the 5 pf caps.

Something else i will fix later.

[kevin gilmore]

schematics, missing the 5pf caps.

http://gilmore.chem.northwestern.edu/kgsshvproduction.pdf

http://gilmore.chem.northwestern.edu/kgsshvpower3.pdf

[charlo89]

Where do you live?

I live in France (Paris)

[MASantos]

I'm sure this has been discussed, but the trafo from SumR will have dual primaries for us 220v guys right?

Kevin, any particular reason for going with Xicon resistors? Similar Vishay Dale RN60(CMF60) are a few cents cheaper than the Xicon ones. Probably no difference but they just look nicer!

ps: link on the bom for the R5, R6 180ohm resistor links to a 120ohm resistor.

[spritzer]

The transformer will have any primaries that you like, dual 117V, single 117/230 or two 117V with 100V taps. SumR can make any of that for you.

Voltage handling is mostly the key here. It's true that not many of the resistors will see the full voltage but we are doing this like it were a production unit, with high tolerances and as little chance of failure as is possible.

[MASantos]

Are we still going ahead with the transformer group buy?

[MASantos]

2SK389 on ebay, do these look legit?

Where are you guys sourcing the actives? Mouser has a few some of them, ebay has 2Sk389's, but the 2sa1968 aren't to be found, at least at those prices on Kevin's BOM.

[Pars]

2SK389 on ebay, do these look legit?

Where are you guys sourcing the actives? Mouser has a few some of them, ebay has 2Sk389's, but the 2sa1968 aren't to be found, at least at those prices on Kevin's BOM.

They look legit, but the amp PCB is not set up for these; it is set up for the Linear Systems version in the TO-71 package, or pairs of 2SK170 singles.

http://www.linearsystems.com/datasheets/LSK389.pdf

[manaox2]

2SK389 on ebay, do these look legit?

He has pretty good ratings. Seller says he is willing to combine shipping for a small group buy, it might save some trouble sourcing these later.