G´day
ECL 82 is a nice little tube with one input triode and one output pentode in the same "bulb". Maximum plate dissipation for the pentode is about 7 watts if i remember correctly.
Nice tube to build simple amps with, as one tube (per channel)contains "everything" needed for a single ended amp. Puts out somewhere around 3 watts in SE pentode mode.
My first tubeamp employed two PCL 82´s (same thing but different filament voltage) with the pentodes wired as triodes.
Quite sweet little bugger...😀
ECL 82 is a nice little tube with one input triode and one output pentode in the same "bulb". Maximum plate dissipation for the pentode is about 7 watts if i remember correctly.
Nice tube to build simple amps with, as one tube (per channel)contains "everything" needed for a single ended amp. Puts out somewhere around 3 watts in SE pentode mode.
My first tubeamp employed two PCL 82´s (same thing but different filament voltage) with the pentodes wired as triodes.
Quite sweet little bugger...😀
K&H
Hi,
You would need speakers in the 94 dB/Watt range at 8 Ohm at least to get some decent output on these.
What exectly would you like to know about the ECL82/6BM8?
Ciao,😉
Hi,
You would need speakers in the 94 dB/Watt range at 8 Ohm at least to get some decent output on these.
What exectly would you like to know about the ECL82/6BM8?
Ciao,😉
APPLICATION NOTES
Hi,
I came across it accidentally so why not:
ECL82/6BM8
Good news for you is that this valve is still in production and relatively cheap.
Cheers,😉
P.S.:
K&H
Hi,
I came across it accidentally so why not:
ECL82/6BM8
Good news for you is that this valve is still in production and relatively cheap.
Cheers,😉
P.S.:
K&H
Re: APPLICATION NOTES
The 6BM8 is a nice little tube -- it has quite a following, particularily in Japan. I am using an SEP 6BM8 in the lab (Calrad) and it does a not bad job of driving my little alnico BK101 hons (90 dB). I also have a couple more that came out of Roberts R-R tape decks. One of these days i'll go over one of them properly and see what i can squeeeze out of them sound-wise.
dave
The 6BM8 is a nice little tube -- it has quite a following, particularily in Japan. I am using an SEP 6BM8 in the lab (Calrad) and it does a not bad job of driving my little alnico BK101 hons (90 dB). I also have a couple more that came out of Roberts R-R tape decks. One of these days i'll go over one of them properly and see what i can squeeeze out of them sound-wise.
dave
I might try the russian variant 6F3P sometime.
I wish they had a 60v heater though; then you could make a two tube transformerless (less the OPTs) stereo amp..
some kind of little deal..
use input trannies to isolate it.
I wish they had a 60v heater though; then you could make a two tube transformerless (less the OPTs) stereo amp..
some kind of little deal..
use input trannies to isolate it.
60V HEATER?
Hi,
Why would you need that for and what has it got to do with OTL?
Are you talking heater to cathode insulation voltages?
Puzzled,
Hi,
Why would you need that for and what has it got to do with OTL?
Are you talking heater to cathode insulation voltages?
Puzzled,
Colt 45:
Try to get some UCL82´s . They have 50V filaments. A bit hard to obtain maybe, but should be possible
Try to get some UCL82´s . They have 50V filaments. A bit hard to obtain maybe, but should be possible
UCL82
Hi,
Why not just polarize the upper tube with a part of the anode supply so that you don't exceed heater to cathode insulation ratings?
I see your point but having a 50V heater supply isn't the sollution since these are current driven heaters.
Ciao,😉
Hi,
Why not just polarize the upper tube with a part of the anode supply so that you don't exceed heater to cathode insulation ratings?
I see your point but having a 50V heater supply isn't the sollution since these are current driven heaters.
Ciao,😉
UCL82
Or maybe not so hard to obtain - 50BM8: $4.00 each at http://www.vacuumtubesinc.com and
http://www.vacuumtubes.com
Or maybe not so hard to obtain - 50BM8: $4.00 each at http://www.vacuumtubesinc.com and
http://www.vacuumtubes.com
i was saying that if i had a 50 or 60v heater, i'd need no filament or HV transfomer, only output transformers.
making a very small amp 😀
edit: thanks for the link tom.
making a very small amp 😀
edit: thanks for the link tom.
UCL82
Hi,
Colt45,here's a Dutchie for ya:
And the site:
http://members.home.nl/kvdijke/projecten/schema_versterker_800%20ohm_am.htm
I see what you're trying to do,cheapskate.😉
Cheers,
Hi,
Colt45,here's a Dutchie for ya:
An externally hosted image should be here but it was not working when we last tested it.
And the site:
http://members.home.nl/kvdijke/projecten/schema_versterker_800%20ohm_am.htm
I see what you're trying to do,cheapskate.😉
Cheers,
Colt45 said:
I don't really recommend that. You really want the isolation from the wall IC. I'm taking 50EH5 and 50C5 amps that rectified the wall, and adding HV trafos (althou since i can keep it isolated i will run heaters off the wall). My 5-buck amp is one of these. It is pretty small.
An externally hosted image should be here but it was not working when we last tested it.
dave
I don't really recommend that
Hi,
And neither do I but I welcome the tubecoolers though.😉
Don't play Frugalfile(TM) from the wallsockets guys it is dangerous and may distroy your project as well.
Bye,😎
Hi,
And neither do I but I welcome the tubecoolers though.😉
Don't play Frugalfile(TM) from the wallsockets guys it is dangerous and may distroy your project as well.
Bye,😎
I have just built one for fun using the Single ended mullard circuit and a 5V4 as rectifier. It sounds pretty good, but definitely could do with a bit more grunt. Also the tubes get really hot, I am at about 8 or 9 watts dissipation tho.
Nice looking amp BTW, is it SE or Push-Pull?
In Push-Pull you could get a clean 10W or so from a pair.
The Japanese seem to love them, I guess its the whole miniturisation factor, they can be built on a very small chassis.
~h~
Nice looking amp BTW, is it SE or Push-Pull?
In Push-Pull you could get a clean 10W or so from a pair.
The Japanese seem to love them, I guess its the whole miniturisation factor, they can be built on a very small chassis.
~h~
ShiFtY said:
50EH5 stereo single ended pentode good for about 1.4 W. Follow the 5-Buck Amp link for the schematics and the story.
This is a single pentode spud amp.
dave
Heh...
I was actually referring to the origninal poster's amp...
Not that your spud amp is bad looking 😀
~h~
I was actually referring to the origninal poster's amp...
Not that your spud amp is bad looking 😀
~h~
UCL82 - The TV audio amplifier!
You might be amused by my use of an ECL82 single ended amp and 4" full range speaker as a 'typical TV audio' setup to illustrate what TV Sound should be like.
AT work I have a continue battle with people over how TV sound ,and radio too, is being reduced to very poor quality by digital compression systems. Most people say it doesn't matter 'cos the TV reproduction is so poor you can't hear the difference so I wheel out my 'typical' early sixties TV audio setup and embarrass the hell out of them.... It's not failed yet.
They do check with other technical sources and most spot that I have used an ECL82 instead of a UCL82 but they can't argue that it's an accurate characterisation...
What price progress....
regards
James
You might be amused by my use of an ECL82 single ended amp and 4" full range speaker as a 'typical TV audio' setup to illustrate what TV Sound should be like.
AT work I have a continue battle with people over how TV sound ,and radio too, is being reduced to very poor quality by digital compression systems. Most people say it doesn't matter 'cos the TV reproduction is so poor you can't hear the difference so I wheel out my 'typical' early sixties TV audio setup and embarrass the hell out of them.... It's not failed yet.
They do check with other technical sources and most spot that I have used an ECL82 instead of a UCL82 but they can't argue that it's an accurate characterisation...
What price progress....
regards
James
ShiFtY said:
oops...
It is a nice clean looking integrated... and i bet SEP with 3-3.5 W/channel...
dave
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