ImPasse Preamplifier

[jackinnj]

Pete Millett sells a Maida regulator board for $15. You'll need to fashion a "heater lifter", just two resistors and a capacitor. DIY PCB - High voltage "Maida" style regulator PCB | eBay

 

[rolandong]

Hi John,

Sorry for dumb question, are R111, R112 and C109 the "heater lifter"?

I used your Maida regulator board and until now this still works well.

Roland

 

[PKI]

I got the amp PCB but would also like to get the PSU board if available?

Thanks!

Do you have have extra boards by any chance?

 

[TonyTecson]

Hi John,

Sorry for dumb question, are R111, R112 and C109 the "heater lifter"?

I used your Maida regulator board and until now this still works well.

Roland

that is a filament dc lifter, merlinb wrote about that here....The Valve Wizard

since the Impasse used dc coupling, the cathode of the concertina has elevated cathodes....s

 

[rolandong]

Tony,

Thanks for link.
I was thinking to improvise the "heater lifter" to use pmillet's Maida reg. board to power 6SL7/6SN7 PP Flea amp, if this is possible.

Roland

 

[TonyTecson]

of course it is possible, for the flea powered pp i am not so sure...there are other tricks in the link i posted..

 

[nkostop]

Hello everybody,
does anyone have schematics and gerber files for the ImPasse?
I am designing my own with Autodesk Eagle but I have not designed pcbs before. Is anybody interested?

I am attaching a screenshot of the current design. The Top is for signal and Power and at the Bottom i try to implement something of a star ground.

Does it make any sense? If it works I can post it here.

 

[jackinnj]

does anyone have schematics and gerber files for the ImPasse?

I made some PCB's and offer them for $3 in respect of SY's intellectual property. Still have some left.

Ed Dell, the Editor of AudioXpress granted me permission to include a copy of the article with the PCB's. God rest his soul.

PM if interested.

 

[nkostop]

thank you jackinnj, I will PM if I fail! 🙂

SY's and AudioXpress does not grant us the right to have an open file here for anyone interested to create his own?

 

[TonyTecson]

try to reach them and ask them directly...Syclotron...SYclotron Audio | Blog

 

[nkostop]

Thank you TonyTecson,
I will do it!

 

[KatieandDad]

I built my own with home made PCBs. I've got the files if you are interested.

 

[blubugeye]

There's a link to a pdf of the original article here.

 

[TonyTecson]

I built my own with home made PCBs. I've got the files if you are interested.

good thing, do you have gerbers?

 

[TonyTecson]

Hello everybody,
does anyone have schematics and gerber files for the ImPasse?
I am designing my own with Autodesk Eagle but I have not designed pcbs before. Is anybody interested?

I am attaching a screenshot of the current design. The Top is for signal and Power and at the Bottom i try to implement something of a star ground.

Does it make any sense? If it works I can post it here.

i have a design using 6sn7 and 6dj8, in case you are interested, a slight deviation from SY's Impasse but sounds very good..

 

[nkostop]

KatieandDad I would also like to have the gerber file if you have them!

Thank you TonyTecson, i would like to check on them!

 

[TonyTecson]

KatieandDad I would also like to have the gerber file if you have them!

Thank you TonyTecson, i would like to check on them!

please pm me your email

 

[KatieandDad]

My Impasse PCB design.

I'll try to locate the original files.

 

[KatieandDad]

I've got these screen shots of the PCBs. I'm not sure which were the final ones ?

 

[KatieandDad]

The last photo was of the original prototype. I eventually had a custom transformer made for UK voltage.

I seem to recall that the first reservoir cap in the B+ supply was too low in value and had to be upped to increase the B+.