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 Forum: Audio, radio, and electronics   Topic: PP UL GU50

 Post subject: Re: PP UL GU50
Posted: Thu May 30, 2013 5:24 pm 

Replies: 5
Views: 3378


... 3 go to output stage, to the same points go parallel feedback by voltage from anodes of Gu-50 tubes. I ordered custom transformers from Edcor. 2x285 V secondary for B+, 66V for bias, 2x12.6 V ...

 Forum: Audio, radio, and electronics   Topic: PP UL GU50

 Post subject: Re: PP UL GU50
Posted: Mon May 27, 2013 3:00 pm 

Replies: 5
Views: 3378


... Look at Pyramid schematics, I used there feedback from anodes to first grids of Gu-50 tubes. It is better than UL with feedback to screen grids. More flexible, more linear, and you can ...

 Forum: Audio, radio, and electronics   Topic: PP UL GU50

 Post subject: PP UL GU50
Posted: Mon May 27, 2013 6:36 am 

Replies: 5
Views: 3378


... setting, some values of voltage to verify my prototype. If I not understand the curves of the tubes, I know read a schema and realize it. A brief overview of some achievements (thank again Elektor ...

 Forum: Audio, radio, and electronics   Topic: GM-70 with 4P1L pentode DRD driver

Posted: Mon Jan 28, 2013 6:16 pm 

Replies: 35
Views: 11732


... corresponding MOSFET and some other components. But you may find it usable to power preamp tubes by clean stabilized voltage that depends on Zeners used. I plan to use this PCBs for other projects ...

 Forum: Audio, radio, and electronics   Topic: 6p15p data данные 6П15П

Posted: Tue Jan 15, 2013 7:50 pm 

Replies: 1
Views: 1665


... размере кликните на неё. http://wavebourn.com/gallery/tn-tubes/6p15p-1.gif http://wavebourn.com/gallery/tn-tubes/6p15p-2.gif http://wavebourn.com/gallery/tn-tubes/6p15p-2.jpg ...

 Forum: Audio, radio, and electronics   Topic: Line array from microphone capsules...

Posted: Sun Mar 18, 2012 11:47 am 

Replies: 18
Views: 4811


... be 420V regulated by pass regulator. Both 6.3V windings in series to power filaments of 12L6GT tubes on the 2'nd floor of SRPP. Rectified by pair of Shottky diodes it will be something like 8V ...

 Forum: Audio, radio, and electronics   Topic: Monster tube project

 Post subject: Re: Monster tube project
Posted: Fri Dec 23, 2011 8:28 pm 

Replies: 9
Views: 2778


... About 12P17L, it is a very good tube. But 4P1L tube is exceptional Look how much 45 and 2A3 tubes cost, and how much do you think 4P1L should cost to match the price/quality criterion? Will ...

 Forum: Audio, radio, and electronics   Topic: Monster tube project

 Post subject: Re: Monster tube project
Posted: Mon Dec 05, 2011 11:14 pm 

Replies: 9
Views: 2778


quikie22 Wrote:

Received the tubes yet? Any good?


Not yet.

 Forum: Audio, radio, and electronics   Topic: Monster tube project

 Post subject: Re: Monster tube project
Posted: Mon Dec 05, 2011 8:45 pm 

Replies: 9
Views: 2778


Received the tubes yet? Any good?

 Forum: Audio, radio, and electronics   Topic: Sub-miniature guitar tube amp

Posted: Sat Jul 09, 2011 5:49 pm 

Replies: 65
Views: 18508


... distorted.. am i missing something here? If you look closer you may see that in my amp preamp tubes and screen grid are powered separately from the output transformer. On loud signals screen grid ...

 Forum: Audio, radio, and electronics   Topic: Sub-miniature guitar tube amp

Posted: Sat Jun 25, 2011 11:15 am 

Replies: 65
Views: 18508


I was thinking along the lines with 6N2P and 6P1P. What do you think about these tubes for a guitar amp? I don't think they will sound like a Champ though... Будут звучать нормально. ...

 Forum: Audio, radio, and electronics   Topic: Sub-miniature guitar tube amp

Posted: Tue Jun 21, 2011 6:24 pm 

Replies: 65
Views: 18508


I was thinking along the lines with 6N2P and 6P1P. What do you think about these tubes for a guitar amp? I don't think they will sound like a Champ though... Why not? Slightly different curves ...

 Forum: Audio, radio, and electronics   Topic: Sub-miniature guitar tube amp

Posted: Tue Jun 21, 2011 3:19 pm 

Replies: 65
Views: 18508


quikie22 Wrote:

I was thinking along the lines with 6N2P and 6P1P. What do you think about these tubes for a guitar amp? I don't think they will sound like a Champ though...


Why not?

 Forum: Audio, radio, and electronics   Topic: Sub-miniature guitar tube amp

Posted: Tue Jun 21, 2011 11:38 am 

Replies: 65
Views: 18508


I was thinking along the lines with 6N2P and 6P1P. What do you think about these tubes for a guitar amp? I don't think they will sound like a Champ though...

 Forum: Audio, radio, and electronics   Topic: Sub-miniature guitar tube amp

Posted: Mon Jun 20, 2011 3:40 pm 

Replies: 65
Views: 18508


... to reproduce sound of a small venerable Fender Champ 5F1 amp using sub-miniature vacuum tubes available from Russia (Soviet military stocks).
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