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Old 17th April 2013, 12:42 AM   #4961
jervill is offline jervill  United Kingdom
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Quote:
Originally Posted by Reegal View Post
I would like to present my last effort:
new s.e. amplifier using 100TH driven by 2A3.
Three power supply tubes regulated, one for 100TH using 6C33C and two ( one per channel) using 6EM7 for 2A3 and input stage.
Cabinet made in solid wood machines with CNC with nice copper inserts.
Wow, looks like a brute! Well done! Do you have a schematic? Interesting to see what all those valves are up to.
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Old 17th April 2013, 01:07 AM   #4962
multi is offline multi  Australia
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Hi Tony;
Do you have a circuit for the 813 amp?
I built Peter Millets 813 triode amp using 12HG7's as the single driver..
thanks
Phil
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Old 17th April 2013, 02:21 AM   #4963
AJT is offline AJT  Philippines
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Quote:
Originally Posted by multi View Post
Hi Tony;
Do you have a circuit for the 813 amp?
I built Peter Millets 813 triode amp using 12HG7's as the single driver..
thanks
Phil
i use the same basic circuit as Pete's minus the computer startup...

2 6ck3's in a hybrid fwb bridge provides about 1100volts at standy..

the 11HM7's has it's own B+ supply at about 440volts dc...

the operating point will probably be at 1kv at 80mA at idle...
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Old 18th April 2013, 12:55 AM   #4964
multi is offline multi  Australia
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Thanks Tony;
My 813 amp runs at 800 volts; i made a regulator to run the 12HG7 but blew it up, so need to remake. at the moment just using resistors to drop the voltage. Would be best to have separate supply.
I don't have the computer startup...
phil
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Old 18th April 2013, 06:35 AM   #4965
AJT is offline AJT  Philippines
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in my case, i added an 0A2 gas reg tube to supply 150 volts to the pentode driver screens, being a separate B+ supply, i felt no need for a regulator to supply this stage...
to me controlling the screen and feeding it off a low impedance source is enough for low distortions, the plates can vary and not have too much effect .....
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Old 19th April 2013, 02:00 PM   #4966
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Location: Russia
Hello everyone!
Here is the latest creation. SE 6G2_EL36.
Attached Images
File Type: jpg ????? IMG_6773.jpg (173.1 KB, 832 views)
File Type: jpg ????? IMG_6778.jpg (188.2 KB, 806 views)
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Old 19th April 2013, 02:18 PM   #4967
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Very good clean build! Looks great...did you do the paintjob yourself?
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Old 19th April 2013, 02:27 PM   #4968
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Nice work!!!

Do the anodized pieces are home-made?
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Old 19th April 2013, 04:49 PM   #4969
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Originally Posted by Bas Horneman View Post
...did you do the paintjob yourself?
With the paint work is helped by friends from the body shop
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Old 19th April 2013, 04:54 PM   #4970
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ovpopov65,
is that stained plywood or hardwood ?
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