mitsos
Well-known member
- Joined
- May 4, 2007
- Messages
- 2,886
October 2018
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I’m moving soon so I'm clearing out the closet a bit. I’ll probably be adding more things as I get organized.
Leftovers of tested/working designs I've done over the past couple of years, some with their respective parts, as kits or mini-kits. I have at least ten of each of the kits, I may have a few more of the EZ-DO.
I'll post/send schematics and BOMs. The tube PSU is a newer version of the one further down, works very well. I first saw it in Kingston's M670 thread, I've used it in tons of things since then.
The API “Be All” 2-channel PCB was a joint design with Nielsk; I know he sold some of his leftover stock before, so there may already be some info, but I haven't really looked.
As always, shipping and PP fees are extra, I'll be sending this by US Postal Service from Chicago.
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Regulated Tube PSU kit. Regulated B+ and +48V, with offboard heater parts. $50 each plus any shipping / fees
Includes everything except for power transformer, 2 trimpots, a 3K9 resistor, and 1-2 resistors for dropping heater voltage as those will be case specific.
PCB pic
Parts pic
The high voltage regulator is borrowed from Kingston's M670. Very well regulated, low ripple. The multiplier is designed with discrete diodes (vs bridges of previous version) and can easily be run as a doubler or tripler by including the last stage or not.
EZ-DO PCB mini kit $5/each plus any shipping / fees
Little PCB (really small, to fit in tight spots) I had made for adding buffered, impedance balanced, direct outputs to consoles and things. Can be set up for unity gain or higher. Uses a standard DIP8 opamp and feeds a Neutrik NYS216 stereo jack. Two parallel sets of power pads so you can daisy chain power from one to the other.
Includes NYS216 jack, machined dip8 socket and Panasonic SU bipolar 10uF and 100uF input and output caps. (I also have a limited number of 0.1uF X7R caps for PS decoupling. I'll include a pair on a first come-first served basis).
The PCBs have a small error; the fix is very easy and documented in the help thread from the last sale.
Here is one built up. Switching jack gets installed last, it goes on underside. The switching contacts don't connect to anything, they are there for extra support.
API-BeALL - $10 each plus any shipping / fees
A PCB I designed with Niels that takes two channels of 2520 and input transformer, and can be wired as a preamp, line amp (with or without input transformer), summing amp, booster amp, etc depending on which components/trimpots/jumpers one chooses to install. Each PCB has two channels with power and ground shared, or you can optionally cut the traces between the two halves and power them separately.
ORDERING:
All first come, first served. Let me know what you would like, as well as where it's being shipped, so I can figure out the totals.
Items below are all gone, just keeping the pics up here for my record:
First, some 312/M1 PCBs, from a group buy we did years ago. Literally found these in a box in the closet. $10/each SOLD OUT
Very versatile preamp PCB, can be set up as a 312 or M1 or anything in between. Can also take a THAT 1646 line driver in case one wants a transformerless output. Has input pad, output pad, polarity invert, and phantom. If you want to get creative, you can also hack the front part off (trafo and switches) and set up as a line amp, summing amp, or whatever amp you want).
Here is the help thread for more info and pics of some people's builds:
http://groupdiy.com/index.php?topic=41339.0
AK47 pcb (small REDD47 pcb) $20 each SOLD OUT
with input trafo (Cinemag, Lundahl, OEP, Altran, including the UA610 trafo) and pads for switching DI between trafo and EF86. I did not include separate pads for the fine gain adjust because I did not use it, but it's easy enough to wire in. Hard to see it in the picture, but the silkscreen says tubes are installed on other side, that's how they worked in my build. In a normal, 2U rackmounted chassis, I would install resistors on the silk screened side and taller components beside the tubes.
Regulated Tube PSU B+ and voltage doubler PCB. $15 each SOLD OUT
The high voltage regulator is borrowed from Kingston's M670. Very well regulated, low ripple. Very nice. The doubler (for phantom) worked with the transformers I had on hand, which had 20+ volt windings, but with some creative placement of some diodes instead of the bridges (and 2 trace cuts), you can make a tripler, quadrupler, etc.) and use it with "normal" tube power transformers with 2x 6V windings. That's what I ended up doing on the last one I built using a transformer had a 12V winding instead.
High Current Neve PSU PCB (+24V and a doubler for 48V).$35/each SOLD! Thanks!
ALL GONE buffered, impedance balanced, direct outs on some Altec equipment.$2.5 / each
And one built up:
+++++++++++++++++++++++++++++++++++++++++++++++++++
I’m moving soon so I'm clearing out the closet a bit. I’ll probably be adding more things as I get organized.
Leftovers of tested/working designs I've done over the past couple of years, some with their respective parts, as kits or mini-kits. I have at least ten of each of the kits, I may have a few more of the EZ-DO.
I'll post/send schematics and BOMs. The tube PSU is a newer version of the one further down, works very well. I first saw it in Kingston's M670 thread, I've used it in tons of things since then.
The API “Be All” 2-channel PCB was a joint design with Nielsk; I know he sold some of his leftover stock before, so there may already be some info, but I haven't really looked.
As always, shipping and PP fees are extra, I'll be sending this by US Postal Service from Chicago.
+++++++++++++++++++++++++++++++++++++++++++++++++++
Regulated Tube PSU kit. Regulated B+ and +48V, with offboard heater parts. $50 each plus any shipping / fees
Includes everything except for power transformer, 2 trimpots, a 3K9 resistor, and 1-2 resistors for dropping heater voltage as those will be case specific.
PCB pic
Parts pic
The high voltage regulator is borrowed from Kingston's M670. Very well regulated, low ripple. The multiplier is designed with discrete diodes (vs bridges of previous version) and can easily be run as a doubler or tripler by including the last stage or not.
EZ-DO PCB mini kit $5/each plus any shipping / fees
Little PCB (really small, to fit in tight spots) I had made for adding buffered, impedance balanced, direct outputs to consoles and things. Can be set up for unity gain or higher. Uses a standard DIP8 opamp and feeds a Neutrik NYS216 stereo jack. Two parallel sets of power pads so you can daisy chain power from one to the other.
Includes NYS216 jack, machined dip8 socket and Panasonic SU bipolar 10uF and 100uF input and output caps. (I also have a limited number of 0.1uF X7R caps for PS decoupling. I'll include a pair on a first come-first served basis).
The PCBs have a small error; the fix is very easy and documented in the help thread from the last sale.
Here is one built up. Switching jack gets installed last, it goes on underside. The switching contacts don't connect to anything, they are there for extra support.
API-BeALL - $10 each plus any shipping / fees
A PCB I designed with Niels that takes two channels of 2520 and input transformer, and can be wired as a preamp, line amp (with or without input transformer), summing amp, booster amp, etc depending on which components/trimpots/jumpers one chooses to install. Each PCB has two channels with power and ground shared, or you can optionally cut the traces between the two halves and power them separately.
ORDERING:
All first come, first served. Let me know what you would like, as well as where it's being shipped, so I can figure out the totals.
Items below are all gone, just keeping the pics up here for my record:
First, some 312/M1 PCBs, from a group buy we did years ago. Literally found these in a box in the closet.
Very versatile preamp PCB, can be set up as a 312 or M1 or anything in between. Can also take a THAT 1646 line driver in case one wants a transformerless output. Has input pad, output pad, polarity invert, and phantom. If you want to get creative, you can also hack the front part off (trafo and switches) and set up as a line amp, summing amp, or whatever amp you want).
Here is the help thread for more info and pics of some people's builds:
http://groupdiy.com/index.php?topic=41339.0
AK47 pcb (small REDD47 pcb)
with input trafo (Cinemag, Lundahl, OEP, Altran, including the UA610 trafo) and pads for switching DI between trafo and EF86. I did not include separate pads for the fine gain adjust because I did not use it, but it's easy enough to wire in. Hard to see it in the picture, but the silkscreen says tubes are installed on other side, that's how they worked in my build. In a normal, 2U rackmounted chassis, I would install resistors on the silk screened side and taller components beside the tubes.
Regulated Tube PSU B+ and voltage doubler PCB.
The high voltage regulator is borrowed from Kingston's M670. Very well regulated, low ripple. Very nice. The doubler (for phantom) worked with the transformers I had on hand, which had 20+ volt windings, but with some creative placement of some diodes instead of the bridges (and 2 trace cuts), you can make a tripler, quadrupler, etc.) and use it with "normal" tube power transformers with 2x 6V windings. That's what I ended up doing on the last one I built using a transformer had a 12V winding instead.
High Current Neve PSU PCB (+24V and a doubler for 48V).
ALL GONE buffered, impedance balanced, direct outs on some Altec equipment.
And one built up:
![Electronics Soldering Iron Kit, [Upgraded] Soldering Iron 110V 90W LCD Digital Portable Soldering Kit 180-480℃(356-896℉), Welding Tool with ON/OFF Switch, Auto-sleep, Thermostatic Design](https://m.media-amazon.com/images/I/41gRDnlyfJS._SL500_.jpg)
