DIY supplies

The community aspect has always been the cornerstone of this project of mine so I routinely sell a number of the custom items that make up my amps.  Mostly this is the custom circuit boards that I’ve designed over the years, ranging from KGSSHV board sets down to the small circuit boards used on the power switches.

Feel free to contact me at spritzer@mjolnir-audio.com if there is something you are looking for.  All the the board sets will only be sold as sets, no singles.  All prices in US dollars (USD).

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A kit to build a +/-450V version of the KGSSHV.  I’ve sold a number of +/-500V kits but I’ve run out of transformers so I swapped to the 450V version.  It contains the KGSSHV boards, transformer with mounting hardware, 12 2SC4686A transistors, 4 2SA1968 transistors, a matched quad of 2SK170 jfets. two LT1021-10 voltage references and Teflon Stax socket with mounting PCB.  This covers most of the hard to find parts for the project.  I will also supply a BOM to make ordering from Mouser much easier.

Price: 460$ plus shipping

Brand new version of the KGSSHV board set which includes two amp channels with onboard heatsinks and a power supply.  This is the very latest version of the HV circuit plus now the option to use mosfets as output devices and the local/global feedback option has been removed.  This was rarely if ever used and makes for a much simpler board with less chance for mistakes.  When these PCB’s were laid out then the MPSW small signal transistors were freely available but now they have been cancelled.  The good news though is that the MPSA variants work perfectly here.

Price: 130$ plus shipping

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Being the only hard to get part for the KGSSHV I’ve amassed a huge stock of these 2SC4686A’s (thousands) which is way more than I’ll ever need.  All came to me in marked Toshiba boxes, either in bags or anti-static tubes.

Price: 5$ each plus shipping

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My special KGST boards plus the super tiny KGSSHV mini PSU.  Do note that his PSU uses the bottom of the chassis as a heat sink for the pass fets.  Over all this is a standard BHSE power supply and can be run at up to +/-400V.  The amplifier boards are a bit smaller than the usual KGST design.  Sold only as a set with two amp boards and one PSU board.

Price:  130$ for the set plus shipping

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A new PCD for the TKD 4CP601 volume pot.  This was designed to be as compact as is possible so the pot sits on top of the I/O sockets.

Price: 10$ plus shipping

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A small PCB for neatly wiring up up to 4 transformers.  It also has a small circuit to drive an LED indicator directly off the mains which is handy in tube amps.

Price: 14$ each plus shipping

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This is a small PCB to use the small 12VA Triad PCB mount transformers.  These are perfect for use with the Antec transformers for the KGST as they all lack the necessary low voltage windings.

Price:  10$ each plus shipping

 

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Due to my recent T2DIY construction I have a surplus of the hard to find XICON resistors.  These are either the exact value needed or a closest one available.

Just drop me a line with the values you need and I’ll see if I have them in stock.

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I have a few extra power supplies for use with the Stax SRS-2170 or any of the small Stax amps (SRM-X, SRM-Xh, SRM-Xs, SRM-212 or SRM-252).  Should be fine with the SRD-X, SRD-XPro and SRD-P too.  These have been modified to use with the Stax amps and fitted with a new plug with the right polarity.  They are 100-240V so they work everywhere in the world and I have a couple of them with Euro and US power plugs.

Price: 35$ shipped world wide

Last updated 28.12.2016