Alain Dupont said:
Hi Alain, thanks for bringing SumR to my attention! The product line looks very promising, how were they to deal with?
rdf,
Custom made, I have asked to about a dozen manufacturers
and their price were twice to more in cost.
Richard Sumner is a gentleman ; don't hesitate to ask ; we started with a 750 VA
but ended with 2 *360 VA low magnetic field ; the specifications were updated 5 or 6 times before final decision was made.
Exception of a little delay, all was fine, plus the price was sooooo low I couldn't resist.
The cost for the pair was 196 cad$ last year shipping included, a real bargain.
And superior quality.
Alain.
Custom made, I have asked to about a dozen manufacturers
and their price were twice to more in cost.
Richard Sumner is a gentleman ; don't hesitate to ask ; we started with a 750 VA
but ended with 2 *360 VA low magnetic field ; the specifications were updated 5 or 6 times before final decision was made.
Exception of a little delay, all was fine, plus the price was sooooo low I couldn't resist.
The cost for the pair was 196 cad$ last year shipping included, a real bargain.
And superior quality.
Alain.
Thanks again for the information Alain. What really caught my eye is SumR also has an audio page and the illustration is torroids. Custom torroidal output transformers it appears? It's not like I don't enough iron around but that's really temping.
Hi,
serengetiplains,
I already have some email exchages with Ari, and I sent him
a few pictures, and we are talking SE amplifiers.
After all he is the father of this baby...
Please, give him my "Bonjour".
Alain.
serengetiplains,
I already have some email exchages with Ari, and I sent him
a few pictures, and we are talking SE amplifiers.
After all he is the father of this baby...
Please, give him my "Bonjour".
Alain.
hi Alain,
that looks very promising!
Are the schematics 'open source', meaning would you mind posting them, or secret?
i can't wait for a comment on listing impressions!
Rüdiger
that looks very promising!
Are the schematics 'open source', meaning would you mind posting them, or secret?
i can't wait for a comment on listing impressions!
Rüdiger
Rüdiger,
The original schematic is from Ari Polisois: A "Classic" The Simplex
http://www.valvediy.com/simplexpg1.html
I only regulated all power supply's and made them adjustable...
You'll have an updated schematic soon! I need one for future maintenance.
The SRPP was from PTSoundlab...
I have attached the Srpp.
PS: I have my own site with some more photos....
http://www3.sympatico.ca/aldupon/
Regards.
Alain.
The original schematic is from Ari Polisois: A "Classic" The Simplex
http://www.valvediy.com/simplexpg1.html
I only regulated all power supply's and made them adjustable...
You'll have an updated schematic soon! I need one for future maintenance.
The SRPP was from PTSoundlab...
I have attached the Srpp.
PS: I have my own site with some more photos....
http://www3.sympatico.ca/aldupon/
Regards.
Alain.
Attachments
Alain Dupont said:
What a nice direct-coupling trick from Ari P.!
Is your version still direct coupled? Why did you chose the SRPP, are both stages SRPP?
Thanks a lot,
Rüdiger
Rüdiger,
I hadded the srpp for more gain.
I was thinking this afternoon, looking at the Srpp, how to position the 200 volts ps
to remove the 3 mF cap....
I haven't figured out yet, but searching....
the srpp is to get 20 db more gain, keeping class A
The Simplex input has only 1/2 volts sensitivity for full power.
I will ask Ari about this point,
The output of the srpp is about 100 + 0.47 Volts
and the grid of the driver is at 1.2 volts
Spraying the 200 volts supply in half should do the tric...
Regards.
Alain.
I hadded the srpp for more gain.
I was thinking this afternoon, looking at the Srpp, how to position the 200 volts ps
to remove the 3 mF cap....
I haven't figured out yet, but searching....
the srpp is to get 20 db more gain, keeping class A
The Simplex input has only 1/2 volts sensitivity for full power.
I will ask Ari about this point,
The output of the srpp is about 100 + 0.47 Volts
and the grid of the driver is at 1.2 volts
Spraying the 200 volts supply in half should do the tric...
Regards.
Alain.
Alain Dupont said:
Must be I'm missing something. If the Simplex has .5 V input sensitivity, then adding 20 dB gain will give it 5 mV sensitivity. Is that really what you want?
BTW: I think it is a really nice (looking) direct coupled design. Wish I could stop by to hear how it sounds. 🙂
-- Dave
Dave Cigna,
Excuse me, the input sensitivity is for about 2 volts for full output {1.8 if I remember},
Its on the article from AudioXpress published by Ari on the Triple 6C33C-B
He explains the global gain... about 60 times
and the gate of the 6C33C-B must get a swing greater than 85 volts for full output
but I have a phono preamp with 500 mV output and some old
tape player which is about 6/800mV output not RMS
It's why I buit the srpp in front of the Simplex, to get some more gain ;
and avoid a preamp
There is a switch to cut the preamp, and use the direct input of the simplex
for my CD player for example.
Once finished and tested, if you come to Montreal it will be a pleasure to show you.
Regards.
Alain.
Excuse me, the input sensitivity is for about 2 volts for full output {1.8 if I remember},
Its on the article from AudioXpress published by Ari on the Triple 6C33C-B
He explains the global gain... about 60 times
and the gate of the 6C33C-B must get a swing greater than 85 volts for full output
but I have a phono preamp with 500 mV output and some old
tape player which is about 6/800mV output not RMS
It's why I buit the srpp in front of the Simplex, to get some more gain ;
and avoid a preamp
There is a switch to cut the preamp, and use the direct input of the simplex
for my CD player for example.
Once finished and tested, if you come to Montreal it will be a pleasure to show you.
Regards.
Alain.
hi
Hi Alain,
I am newie. saw wat your posting here. So , how is yr baby work out? I want to build one soon but not decide wat to build yet.
regards
marco
Hi Alain,
I am newie. saw wat your posting here. So , how is yr baby work out? I want to build one soon but not decide wat to build yet.
regards
marco
Marco,
The baby is well, not yet ready for "delivery"
It remains a lot of thing to do, wiring the power supplys in the amplifier
and making the tests....
All in all about one more week of work!
I am very pleased ; the goal was to make a "Cute" version of the Simplex
But it's a lot of woodwork, drillings ... I started about a year ago
PS: I already built a Passdiy A75, a CCS-X-Bosoz and a ONO...
Projects for a pair of Aleph-X and Aleph-J in the same enclosure are pending...
As I recall, I wanted to build a tube amp years ago, but had no time!
The Simplex offered a nice SE with 18 watts ; and the 6C33C-B are gorgeous
Plus I have a pair of full range Nirvana 6" 1/2 speakers ; and 2 enclosure designs
to try...
Good luck for your projects, and depending on you abilities for electronics
and metalwork or woodwork ; don't hesitate to start something.
There are Tubes and Mosfets projects to choose, define your budget ;
and if you need help, there are gentleman's here on DIYAudio willing to help.
Regards.
Alain
The baby is well, not yet ready for "delivery"
It remains a lot of thing to do, wiring the power supplys in the amplifier
and making the tests....
All in all about one more week of work!
I am very pleased ; the goal was to make a "Cute" version of the Simplex
But it's a lot of woodwork, drillings ... I started about a year ago
PS: I already built a Passdiy A75, a CCS-X-Bosoz and a ONO...
Projects for a pair of Aleph-X and Aleph-J in the same enclosure are pending...
As I recall, I wanted to build a tube amp years ago, but had no time!
The Simplex offered a nice SE with 18 watts ; and the 6C33C-B are gorgeous
Plus I have a pair of full range Nirvana 6" 1/2 speakers ; and 2 enclosure designs
to try...
Good luck for your projects, and depending on you abilities for electronics
and metalwork or woodwork ; don't hesitate to start something.
There are Tubes and Mosfets projects to choose, define your budget ;
and if you need help, there are gentleman's here on DIYAudio willing to help.
Regards.
Alain
Hi Alain
I was looking at the schematic and asked myself if the author looked for the influence of mains variation in the working of this amp. I wanted to ask you if you made some tests if the dissipation of the 6C33C was not being exceeded with changing mains, but now I read you are using regulated supplyes throughout, so you probably won't even have this problem. Will have to find someoene else to ask...
But that lead to another question, which kind of regulator are you using for the B+ and the filaments off the 6C33C? Should be quite a regulator, dissipating quite some watts!?
Erik
I was looking at the schematic and asked myself if the author looked for the influence of mains variation in the working of this amp. I wanted to ask you if you made some tests if the dissipation of the 6C33C was not being exceeded with changing mains, but now I read you are using regulated supplyes throughout, so you probably won't even have this problem. Will have to find someoene else to ask...
But that lead to another question, which kind of regulator are you using for the B+ and the filaments off the 6C33C? Should be quite a regulator, dissipating quite some watts!?
Erik
ErikdeBest,
Yes regulations everywhere.
A CCS based on Supertex DN2470 ;{removed the zener's} on all HT
or IXCP10M45s, at 4/5 mA ; John Broskie helped me on this one!!!
that gives me adjustables supplys with a slow turn on {20 sec"}
See Post#16 for details
For the 6C33C-B heater: 12.6 DC heater Regulated with Linear LT1083 and relay with resistor 0.5 Ohms for startup ; voltage adjustable too...
and an other relay will delay B+ for 120 seconds
I got the 2 Linear LT1083 for free, so why not a try... Thanks to Linear !!!
The great problem is the current at startup... >15 AMps
so the idea of starting as a shunt reg with a 0.5 Ohms limits current at <10 Amps
and 3 second later a relay shorts the 0.5 Ohms resistor...
Then with a pot the voltage is adustable ...
Dissipation ... Voltage at regul 18 volts on load
current 3.3 amps so: 18-12.6 = 5.4 v * 3.3 A == 18 watts.... Good isn't it!!
😱
I will put the schematics on my site as soon as the tests are finished...
We are putting fire this afternoon, just waiting for the "Indian" and smoke...
Regards.
Alain.
Yes regulations everywhere.
A CCS based on Supertex DN2470 ;{removed the zener's} on all HT
or IXCP10M45s, at 4/5 mA ; John Broskie helped me on this one!!!
that gives me adjustables supplys with a slow turn on {20 sec"}
See Post#16 for details
For the 6C33C-B heater: 12.6 DC heater Regulated with Linear LT1083 and relay with resistor 0.5 Ohms for startup ; voltage adjustable too...
and an other relay will delay B+ for 120 seconds
I got the 2 Linear LT1083 for free, so why not a try... Thanks to Linear !!!
The great problem is the current at startup... >15 AMps
so the idea of starting as a shunt reg with a 0.5 Ohms limits current at <10 Amps
and 3 second later a relay shorts the 0.5 Ohms resistor...
Then with a pot the voltage is adustable ...
Dissipation ... Voltage at regul 18 volts on load
current 3.3 amps so: 18-12.6 = 5.4 v * 3.3 A == 18 watts.... Good isn't it!!
😱
I will put the schematics on my site as soon as the tests are finished...
We are putting fire this afternoon, just waiting for the "Indian" and smoke...
Regards.
Alain.
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