Vanderveen 73 Watt valve amplifier PR20HE-S2

Cede · 28th December 2009, 04:13 AM

Hi,

I went across this page from Vanderveen
UL40-S2-Mod

Has anybody tried to build such an amp with 6550 ?

I built a few amps in another life, when I was younger... and now I have a bit more time and money, I'd like to get back to tube amps.

I'm in the period of chossing the design of the amp.
I'm thinking about KT88 PP David Hafler like, but found this pr20he design so simple that it could do the job.

Any advice ?

Regards,
Cedric

planet10 · 28th December 2009, 04:37 AM

That is an interesting amp, particularily the way the cathodes are wired up.

I'm no tube guru, but the ECC81 LTP front end is possibly going to need some drive to get the thing to full power (the article says 2V but...) It is similar to the 1st stage of "El Cheapo", which has much easier to drive EL84/6V6/6AQ5. LIKE EL CHEAPO IT COULD LIKELY BENEFIT FROM A CCS ON THE TAIL.

Menno knows his stuff so i'm possibly out to lunch on that. I had the priviledge of meeting Menno, and sat in on a conversation between him and another transformer guru his equal. Most of it was over my head, but it was a heady experience.

Aesthetics are quite nice.

richwalters · 28th December 2009, 09:38 AM

EL156 Shugangs oct version; who stocks e'm in Western Europe or US ?

richy

Cede · 28th December 2009, 06:00 PM

Thx Planet10.

Menno surely knows his stuff, and his project is of great interest.
Every amp can be tricked to get as close as the sound you like.

About your meeting I know what you're talking about. A friend of my father was working for Jadis and tried to teach me tubes....
Well too far in space for my little teenager head. I learned the hard way by myself, let it go for a good 15 years and now I'm trying to re understand tubes

28th December 2009, 04:13 AM	#1
Cede diyAudio Member Join Date: Dec 2009 Location: Thetford Mines, QC	Vanderveen 73 Watt valve amplifier PR20HE-S2 Hi, I went across this page from Vanderveen UL40-S2-Mod Has anybody tried to build such an amp with 6550 ? I built a few amps in another life, when I was younger... and now I have a bit more time and money, I'd like to get back to tube amps. I'm in the period of chossing the design of the amp. I'm thinking about KT88 PP David Hafler like, but found this pr20he design so simple that it could do the job. Any advice ? Regards, Cedric

28th December 2009, 04:37 AM	#2
planet10 frugal-phile(tm) diyAudio Moderator Join Date: Oct 2001 Location: Victoria, BC, NA, Sol III Blog Entries: 4	That is an interesting amp, particularily the way the cathodes are wired up. I'm no tube guru, but the ECC81 LTP front end is possibly going to need some drive to get the thing to full power (the article says 2V but...) It is similar to the 1st stage of "El Cheapo", which has much easier to drive EL84/6V6/6AQ5. LIKE EL CHEAPO IT COULD LIKELY BENEFIT FROM A CCS ON THE TAIL. Menno knows his stuff so i'm possibly out to lunch on that. I had the priviledge of meeting Menno, and sat in on a conversation between him and another transformer guru his equal. Most of it was over my head, but it was a heady experience. Aesthetics are quite nice. __________________ community sites t-linespeakers.org, frugal-horn.com ........ commercial site planet10-HiFi p10-hifi forum here at diyA

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28th December 2009, 09:38 AM	#3
richwalters diyAudio Member Join Date: Sep 2003 Location: Alps:Tube amp designs over 150W, SMPS guru.	EL156 Shugangs oct version; who stocks e'm in Western Europe or US ? richy

28th December 2009, 06:00 PM	#4
Cede diyAudio Member Join Date: Dec 2009 Location: Thetford Mines, QC	Thx Planet10. Menno surely knows his stuff, and his project is of great interest. Every amp can be tricked to get as close as the sound you like. About your meeting I know what you're talking about. A friend of my father was working for Jadis and tried to teach me tubes.... Well too far in space for my little teenager head. I learned the hard way by myself, let it go for a good 15 years and now I'm trying to re understand tubes

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