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spritzer    1,474

To add to this then there is the mod to the SRM-007t which turns it into a KGST, aka a mini BHSE. 

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nopants    118

Have the pinouts of the smd components been fixed? I seem to remember there being an error on the kgsshv board, the input fet pair I think?

 

Any special current requirements for the HV transformers? 

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kevin gilmore    1,010

yep, the input fet has been fixed.

also, next version of the kgsshvk board has it fixed too.

(at least I think its fixed, please check)

 

hv transformer is going to be lower voltages.

 

best idea to have a separate filament transformer and

time delay.

 

current power supply board works fine with the resistors

adjusted for 400v which means the unregulated voltages

should be about 465v.

 

will post newest picture, same name in a few minutes

Edited by kevin gilmore

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spritzer    1,474

Yes, if Alex had any clue.  This one is also cheaper to build when done at lower voltages.   It's been one of these projects that has been on the backburner for way too long.  Here is mine, adapted from boards Marc did and pretty close to what I'm doing with the SRM-007t. 

 

7D5Jkx0h.jpg

Er0I2TLh.jpg

 

Still in that... works but not finished stage along with dozens and dozens of other projects.  Been like this since 2011...  :-[

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wink    247

How's it compare with the "Light Flashing Lightning" you have the KGST parked on.?

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wink    247

Stupid double post.

Edited by wink

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spritzer    1,474

That case used to be our version of the LL but it made no sense to finalize it so the mini ESX inherited the case.   That one has the original Exstata PSU which naturally is shit so that needs to be fixed.  

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nopants    118

seems like it's the same tier as the hv, and easier to build (because we don't have to mount output devices to heat sinks)

 

What's the current output at the last stage, 10mA? Can we also use the 01n100nd? I only ask because I have a shipment of those coming in with enough extras for the CCS.

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kevin gilmore    1,010

yes 10ma in the output stage. That's 80% of the tube rating.

 

you can use the other parts, but they are not as temperature stable.

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spritzer    1,474

How this KGST stands in sound quality with O2mkI against the KGSSHV? And in build difficulty?

Thanks

 

Mine is pretty different so it hard to compare against this version.  If anybody has heard a fixed SRM-007t it's like that except more better.  :)

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spritzer    1,474

Well... it is more similar than not.  Lower voltage but the KGSSHV was never really about the voltage...

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nopants    118

Can you talk a little bit more about the boards on which you built your kgst spritzer? what is the vulcan?

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spritzer    1,474

Marc drew it up (or had it drawn up, can't remember) back in the day and it's basically the front end off the SRM-007t coupled to a CCS loaded quad of 6S4A's.  I modified the boards to turn them into a KGST so just one tube per phase and a simple 10M90 ccs.  Works well enough but I'll probably put the boards back on a shelf in favor of the ones I'm designing now. 

 

This is a part of larger move to possibly make a limited run of KGST amps.  A couple of friends have been asking for a mini Blue Hawaii that would be as slim as is possible for desktop use.  The KGST is the most logical circuit for that and it would be fun to do a custom chassis with some over the top PSU design in a separate box.  The design is pretty much ready in my head but I simply need to find some time to invest in it and see if any of this can be done locally for me.  None of this would be cheap though but that's hardly the point when making something cool...  :)

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nopants    118

killing me, too many designs to play with

also a reminder to move my megatron into the office

 

Also if you have room for one more please pencil me in for that run of amplifiers :)

Edited by nopants

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Kerry    768

Totally interested :)

 

Can't wait to see what you come up with.  I'm thinking of this for an office rig.  I'm wondering how well it would drive O2's.

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