leadbreath

Re: APP Studio Ing's products - closed
« Reply #760 on: July 19, 2013, 05:43:35 PM »
pier i would also be interested in the germanium doa's if u would reconsider restocking them?

mick
f**k marlbro's and weed ill stick to smoking germanium and silicon


ppa

Re: APP Studio Ing's products - closed
« Reply #761 on: July 19, 2013, 05:54:32 PM »
pier i would also be interested in the germanium doa's if u would reconsider restocking them?

mick

I have developed a new germanium doa , the APP2056,

APP2050GE is out of production

Pier Paolo


dogma

Re: APP Studio Ing's products
« Reply #762 on: August 03, 2013, 08:14:02 AM »
Hi Pier - I purchased a Sontec 250 off another forum member. What opamps would you suggest to replace them with? I think your familiar with the circuit but I can get the ones currently in there. Great to see the Ma1 back in stock!. What is the new APP-MO6? And finally, how much are the germ opamps. Thanks pier. I'l l get this keyboard replaced one of these days - matt

ppa

Re: APP Studio Ing's products
« Reply #763 on: August 03, 2013, 11:05:05 AM »
Hi Matt,

I think to APP992 , moreover I have changed some transistors to get a max power supply voltages
of +/-28V that is that used in Sontec eqs. APP992 is used in several DIY Sontec eqs with outstanding result.   
APP MO-6 is a replacement of the Neumann MO-6 but its socket is not the 2520/990.
In any case the   APP992 is much more trasparent than APP MO-6. 
APP2056GE is a germanium colored DOA, it cannot work with +/-28V of power supply.

Pier Paolo

« Last Edit: August 03, 2013, 04:41:34 PM by ppa »

culteousness1

Re: APP Studio Ing's products
« Reply #764 on: August 06, 2013, 01:39:06 PM »
Ciao Pier,

finally I found the time to finish my Dual Piccolo:




So far I am very happy with this one.
No noise, hum or other weird things.

Was nice and easy to build!

Thank you,
Carsten
« Last Edit: March 16, 2017, 02:41:14 PM by culteousness1 »
"What's all this analog stuff anyhow?" - Bob Pease
"My favorite programming language is ... solder." - Bob Pease

sr1200

Re: APP Studio Ing's products
« Reply #765 on: August 06, 2013, 02:26:00 PM »
Any way to add trim pots to that?
MEI Studio - Long Island, NY: http://www.meirecords.com

ppa

Re: APP Studio Ing's products
« Reply #766 on: August 06, 2013, 04:20:55 PM »
Ciao Pier,

finally I found the time to finish my Dual Piccolo:
So far I am very happy with this one.
No noise, hum or other weird things.

Was nice and easy to build!

Thank you,
Carsten

many thanks for the post.
the work looks very good!

Pier Paolo

ppa

Re: APP Studio Ing's products
« Reply #767 on: August 06, 2013, 04:21:50 PM »
Any way to add trim pots to that?

Yes, just using two 10k or 5k log pot and some coax wires

sr1200

Re: APP Studio Ing's products
« Reply #768 on: August 06, 2013, 05:21:02 PM »
 ;)  VERY interested.  My current PowerAmp needs to GO! ASAP lol.
MEI Studio - Long Island, NY: http://www.meirecords.com

ppa

Re: APP Studio Ing's products
« Reply #769 on: August 07, 2013, 04:57:09 PM »
;)  VERY interested.  My current PowerAmp needs to GO! ASAP lol.

If you need more power and dynamic and better sound quality than "Piccolo" amp I have designed a mosfet power amp module rated of 100W 8ohm / 180 W/4ohm rms. To get a stereo power amp there are needed two boards. They have a powerful and precise sound with a lot of dynamic.
I have the PCB's available.
« Last Edit: August 08, 2013, 08:11:41 AM by ppa »


culteousness1

Re: APP Studio Ing's products
« Reply #770 on: August 08, 2013, 06:28:50 AM »
If you need more power and dynamic and better sound quality I have designed a mosfet power amps rated of 100W 8ohm / 180 W/4ohm rms.
The have a powerful and precise sound with a lot of dynamic.
I have the PCB available.

Pier, where can I find a schematic for this "Mille e Ventidue"?
I might be interested as well...

Cheers,
Carsten
"What's all this analog stuff anyhow?" - Bob Pease
"My favorite programming language is ... solder." - Bob Pease

ppa

Re: APP Studio Ing's products
« Reply #771 on: August 08, 2013, 08:14:51 AM »
that "Mille e ventidue" amp is the previus version of this power amp module of 100W/ 8 ohm.

I am going to send you the 1022 docs by email.

"Mille e Ventidue" is 1022 in italian language.   

cheers
Pier Paolo

culteousness1

Re: APP Studio Ing's products
« Reply #772 on: August 08, 2013, 08:53:04 AM »
Ok. I thougt the 1022 was the actual one (100W/8Ω).
Could you send me the documents of the new version, please?

Carsten
"What's all this analog stuff anyhow?" - Bob Pease
"My favorite programming language is ... solder." - Bob Pease

sr1200

Re: APP Studio Ing's products
« Reply #773 on: September 03, 2013, 04:52:59 PM »
Quick question regarding the germanium DOA.  Have you heard of the DOAs going into thermal shutdown after a long period of use?  Had a LONG session the other day and one of my channels fizzled out after about 6hrs.  I turned off the unit, after a few, turned it back on and it was fine. 
MEI Studio - Long Island, NY: http://www.meirecords.com

ppa

Re: APP Studio Ing's products
« Reply #774 on: September 03, 2013, 05:39:44 PM »
Quick question regarding the germanium DOA.  Have you heard of the DOAs going into thermal shutdown after a long period of use?  Had a LONG session the other day and one of my channels fizzled out after about 6hrs.  I turned off the unit, after a few, turned it back on and it was fine.

there is thermal shutdown only if the DOA have a wrong component inside or there is a short cut or a false contact inside it. I suppose that in your DOA there is a false contact that became open after some hours of work.

Pier Paolo
« Last Edit: September 04, 2013, 01:02:37 AM by ppa »

sr1200

Re: APP Studio Ing's products
« Reply #775 on: September 04, 2013, 01:05:17 AM »
How about if wires inadvertantly wound up ontop of the DOA smothering it.  Dunno how they got moved, they were ziptied together away from the chips.  Moved the wires out of the way, shes been cooking for about 4 hours now and no problems :)
MEI Studio - Long Island, NY: http://www.meirecords.com

ppa

Re: APP Studio Ing's products - CLOSED
« Reply #776 on: October 14, 2013, 05:26:40 PM »
new stock of MA1

Re: APP Studio Ing's products - CLOSED
« Reply #777 on: October 14, 2013, 07:14:57 PM »
Now that´s timing! I can´t stop myself from midnight shopping   ;)

ppa

Re: APP Studio Ing's products - CLOSED
« Reply #778 on: October 14, 2013, 07:35:46 PM »
Now that´s timing! I can´t stop myself from midnight shopping   ;)

payment request sent

Re: APP Studio Ing's products - closed
« Reply #779 on: November 18, 2013, 05:36:46 PM »
Ciao !...at the end here some APP1060's picture ( MA1's rack version) that  i've built



i've made with AF127 germanium Transistor, Classic api 2503 out transfo and silentarts's Haufe St8456 input transfo



PierPaolo helped me a lot to fix some component...and at the first listening they seems absolutely fanstastic especially on both elect. bass and guitar and of course voice too



So happy customer here, really thanks PierPaolo!  :)

 
« Last Edit: November 18, 2013, 07:19:41 PM by fonzobrown »