Jump to content

i'm on a roll... the kgsshv


Recommended Posts

added the tkd pot. adding the alps pot might be a bit tricky.

Since they are on extenders like the T2, you can put it into any chassis you want.

http://gilmore.chem.northwestern.edu/kgsshvamp.jpg

first cut at power supply schematic

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

and bom (missing among other things the xlr jacks) but close

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

The power supply costs more than the amplifier.

(which is usually the case for high end stuff)

You can certainly go cheaper and unregulated i you want...

Board pair estimate about $50 (1 each stereo balanced amp board, and 1 power supply board)

Link to post
Share on other sites
  • Replies 5.4k
  • Created
  • Last Reply

Top Posters In This Topic

Top Posters In This Topic

Popular Posts

Not sure if we have a KGSS thread but I'll just post this here.  So last year it dawned on me that I built my first KGSS amp 15 years ago and something had to be done to celebrate that.  It started of

Here's my KGSSHV build to offset all the fantastic, professional-looking ones posted in this thread (milling your own front plate?!).  I had an old computer case lying around, so used that as the chas

Posted Images

This will likely go down the same way as the T2, except i'm not doing chassis this time.

(well except for me) So in a month or two after i have all 3 pots, and have measured 5 times or

more to make sure everything will fit, then i will do a board run. Say 20 pieces of each.

The boards are much cheaper than the T2 so its no big deal if it takes me a couple of months

to get rid of them all...

Link to post
Share on other sites
I would love to hear one. Any chance someone besides Kevin will be building one in the next 6 months or so? ;)

You can expect one massive beast (10mm panels) featuring these boards ASAP being built up here. :)

Link to post
Share on other sites
You can expect one massive beast (10mm panels) featuring these boards ASAP being built up here. :)

That is going to be a bit of a problem with the neutrik jacks... They are designed for 6.35 mm. Might fit anyway but they are going to

bend a bit.

Link to post
Share on other sites
+/-350V being considered boring just shows how utterly bonkers we really are... :D
's'truth -- even as an innocent bystander over here, I didn't think twice about it, despite actually looking for what he considered boring.
Link to post
Share on other sites
That is going to be a bit of a problem with the neutrik jacks... They are designed for 6.35 mm. Might fit anyway but they are going to

bend a bit.

6mm for the back plate, that's about the max most RCA's will fit. I'd probably wire most of the stuff off the board which leads to the next PM...

Link to post
Share on other sites
's'truth -- even as an innocent bystander over here, I didn't think twice about it, despite actually looking for what he considered boring.

SEE it goes like this.... The higher the power supply voltages (everything else staying the same) the faster the slew rates. The word OVERKILL does not seem to

be in my vocabulary.

It would take me a while to find it, but i think ti kan said the B22 did something like 75 volts per microsecond. I'm not sure i believe that, but

then an electrostatic amp should be able to do 10 times that. Or 750 volts per microsecond. A non-trivial task for sure.

Last nutty idea for this year...

Anyone interested in a dynamic version of the T2 with 6as7's as output tubes??

Sort of a re-do of my original MIG amp, except completely circuit board based, with + and - 75 volt power supplies...

Balanced ONLY.

Although one of these days i'm going to do a DC coupled circlotron...

Link to post
Share on other sites
Balanced ONLY.

How about those small and cheap Hammond input transformers? Not ideal but it gives the option of a SE input...

Could you countsink the front and back plate as needed?

I could but it requires milling and all I have is a drill press. I did find a place locally which could help me with that and the KGSSHV would be a good choice as any for them to make a chassis for me. There is also the option to just mount the connectors to the chassis as we usually do. Since I use SE inputs exclusively that is almost given with any amps I build.

Birgir, if (as if "if" is the right word to use) I like the SRD7 and Lambda PRO you are to be blamed! :)

You wouldn't be the first. :D n3rdling IIRC bought his first Stax setup from me and now I'm racing to finish my old BH for him...

Link to post
Share on other sites

What i ment to say for the T2 like dynamic amp, was BALANCED OUTPUT only.

It would still be balanced or unbalanced input.

The thing is that the servo will make both sides of the output zero volts, but with

respect to ground it may still be 1 volt or more. (same as the nelson pass things)

Link to post
Share on other sites

depending on the thickness of the transformer which will mount to the back panel

i'm pretty sure that if you do it as one box, it sends up 14 across by 11 deep with

1 inch between the 2 boards.

I might have to make it a bit longer to accomidate the transformer.

Looks like both boards will fit in the Hifi2000 Pesante Dissipante 300 mm depth case (14.75x12") if there is room for the transformer on the back panel.

Link to post
Share on other sites
SEE it goes like this.... The higher the power supply voltages (everything else staying the same) the faster the slew rates. The word OVERKILL does not seem to

be in my vocabulary.

It would take me a while to find it, but i think ti kan said the B22 did something like 75 volts per microsecond. I'm not sure i believe that, but

then an electrostatic amp should be able to do 10 times that. Or 750 volts per microsecond. A non-trivial task for sure.

According to the plot here: (on the Specifications pageThe β22 Stereo Amplifier (on the "specifications page) the slew rate on the beta22 is more than 200 v/microsecond (at least in the first results for the 100kHz square wave). So you're aiming for 2000 v/microsec :)

Edited by Dreadhead
Link to post
Share on other sites

You wouldn't be the first. :D n3rdling IIRC bought his first Stax setup from me and now I'm racing to finish my old BH for him...

Yep, a simple Stax Lambda Sig + SRM-1 mkII was enough to get me hooked. I'm finally nearing the end of the road though. :)

Link to post
Share on other sites
Looks like both boards will fit in the Hifi2000 Pesante Dissipante 300 mm depth case (14.75x12") if there is room for the transformer on the back panel.

If you do it with this case, there is plenty of room for everything and you can lay the transformer down. Its 3.5 inches in diameter and about 2 inches high, so on the power

supply board that is 8.65 inches long there is plenty of room for the transformer.

Link to post
Share on other sites
  • 1 month later...
added the tkd pot. adding the alps pot might be a bit tricky.

Since they are on extenders like the T2, you can put it into any chassis you want.

http://gilmore.chem.northwestern.edu/kgsshvamp.jpg

first cut at power supply schematic

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

and bom (missing among other things the xlr jacks) but close

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

The power supply costs more than the amplifier.

(which is usually the case for high end stuff)

You can certainly go cheaper and unregulated i you want...

Board pair estimate about $50 (1 each stereo balanced amp board, and 1 power supply board)

Pin configuration of following Japanese small transistors are ECB not BCE.???

2SC1815/C2240/C2705/A970  Shape of silk screens are opposite.

Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


×
×
  • Create New...