looking for a building shematic for ECLL800

spektraldata · 27th December 2005, 06:33 PM

Hello all...

One of my "dream" is to have and build a tube amplifier...
I have already (someone give me) 3 ECLL 800...
So if someone know know where to find some shematic for a
diy around this tube...you 're welcome !

Sorry for my english...THX

Giaime · 27th December 2005, 07:03 PM

This is it, assuming that:

1) you've read the safety guide about the high voltages. Look at a thread here, in this forum, that's sticky.

2) you know how to build a 250V supply.

I personally would wire the pentodes as triodes...

spektraldata · 27th December 2005, 08:35 PM

Thanks...
Yes I've work in electronic fabrication and repair
But only in TV section so I don't know a lot of thing in tube...

Have you got shematic for the power supply ?
Is this amplifier good quality ?
Can you tell me the detail of the component ?
(watt of the resistor...value of condensator...)

I know where to find the out transfo and power...

Last question...does this schematic need a preamplifier ?

Best regard

spektraldata · 27th December 2005, 10:23 PM

Yes...i need to know ...

The type and value of the condensateur...
The power of the resistor
If i need and preamplifier wich one ?(to work with CD player)
A schematic of the power supply
The 6.3V in DC or AC ?
How many ampere for high voltage and hot circuit for one tube ?
Can I test my tube before begin to build ?(i think no but...)

If you can answer this...you 're the best....

I will put a tempo on high voltage...is it good?

sorry i need all the detail to sart my project ....and learning...

thanks a lot

Giaime · 27th December 2005, 10:48 PM

Quote:

Originally posted by spektraldata
The type and value of the condensateur...

0.47uF 400V polypropilene will do good, but in parallel of that 180ohm resistor use a 100uF electrolytic of good quality.

Quote:

Originally posted by spektraldata
The power of the resistor

1k and 1M ones will be good at 1/4W, 150k is better 1W and 180ohm will be I^2*R = 0.026*0.026*180 = so small, put 1W and your're fine.

Quote:

Originally posted by spektraldata
If i need and preamplifier wich one ?(to work with CD player)

Mmmmm I think you need one. You need a gain of 3 or 4... do a search for the various linestages you'll find on the net.

Quote:

Originally posted by spektraldata
A schematic of the power supply

That's easy.... do a search for the various power supply schematics of other amps, or try to design yourself.

Quote:

Originally posted by spektraldata
The 6.3V in DC or AC ?

Either will be good, however DC will be quieter.

Quote:

Originally posted by spektraldata
How many ampere for high voltage and hot circuit for one tube ?

You'll need about 70mA per tube (both pentodes and the triode), look for 80mA to have better regulation. The 6.3V supply has to be at least 600mA per tube.

Quote:

Originally posted by spektraldata
Can I test my tube before begin to build ?(i think no but...)

With a tube tester, yes...

Quote:

Originally posted by spektraldata
I will put a tempo on high voltage...is it good?

You mean a time delay? That's good... it will make the cathode warm before applying the high voltage. It will longer the life of the tubes.

Steven-H · 9th May 2007, 06:35 PM

I just stumbled upon this thread (thanks to Dave for the idea...). I'm going to try to toss this together el Cheapo. Here are my thoughts on the iron:
Power: Hammond 261G6 (250v 130mA, 6.3v@2A)
Choke: C354 Dynaco (1.5H @ 58ohm, 200mA)
OPT: Hammond 1609 (10k)
The total for the iron comes out to be about $110

The PSU is a SS CLCRC design, using 1N4007 diodes in full bridge. C1=120uF, C2=120uF, C3=100uF. R1 = 470 ohm, 15W

I am still undecided about the heaters, although I think DC may be the way to go...Dependant upon where I can find these tubes, I hope to get this done under $200....

Thoughts ?
-Steve

Klimon · 9th May 2007, 07:49 PM

http://www.jogis-roehrenbude.de/Verstaerker/ECLL800.htm

I think one ecc83 'll be more than enough gain.

Simon

Steven-H · 9th May 2007, 07:52 PM

Yes - I know...Which is rather unfortunate. But if you had the tubes on hand....

Klimon · 9th May 2007, 07:59 PM

Oops, overedited my last post...

In Europe you could try to find an old radio and pull them but in the US they'll be scarce.. I've got the parts from a radio, should be a nice little project (still adding a few grey hairs

)

Simon

Steven-H · 9th May 2007, 08:33 PM

Simon,
Thanks for the help ! I was also thinking of an ECC83/12AX7 driver. That said, that is beyond the rating of the power transformer I selected (it is rated at 130mA), so I will have to find something abit hotter - which unfortunately means larger. I was trying to make a nice small unit; any suggestions on some nice small 250v, 150mA, 6.3v@2A units

Thanks !
Steve

27th December 2005, 06:33 PM	#1
spektraldata diyAudio Member Join Date: Dec 2005 Location: paris	looking for a building shematic for ECLL800 Hello all... One of my "dream" is to have and build a tube amplifier... I have already (someone give me) 3 ECLL 800... So if someone know know where to find some shematic for a diy around this tube...you 're welcome ! Sorry for my english...THX

9th May 2007, 06:35 PM	#6
Steven-H diyAudio Member Join Date: Jan 2007 Location: The 1st State	Bringing out the dead... I just stumbled upon this thread (thanks to Dave for the idea...). I'm going to try to toss this together el Cheapo. Here are my thoughts on the iron: Power: Hammond 261G6 (250v 130mA, 6.3v@2A) Choke: C354 Dynaco (1.5H @ 58ohm, 200mA) OPT: Hammond 1609 (10k) The total for the iron comes out to be about $110 The PSU is a SS CLCRC design, using 1N4007 diodes in full bridge. C1=120uF, C2=120uF, C3=100uF. R1 = 470 ohm, 15W I am still undecided about the heaters, although I think DC may be the way to go...Dependant upon where I can find these tubes, I hope to get this done under $200.... Thoughts ? -Steve

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27th December 2005, 07:03 PM	#2
Giaime diyAudio Member Join Date: Oct 2004	This is it, assuming that: 1) you've read the safety guide about the high voltages. Look at a thread here, in this forum, that's sticky. 2) you know how to build a 250V supply. I personally would wire the pentodes as triodes...

27th December 2005, 08:35 PM	#3
spektraldata diyAudio Member Join Date: Dec 2005 Location: paris	Thanks... Yes I've work in electronic fabrication and repair But only in TV section so I don't know a lot of thing in tube... Have you got shematic for the power supply ? Is this amplifier good quality ? Can you tell me the detail of the component ? (watt of the resistor...value of condensator...) I know where to find the out transfo and power... Last question...does this schematic need a preamplifier ? Best regard

27th December 2005, 10:23 PM	#4
spektraldata diyAudio Member Join Date: Dec 2005 Location: paris	Yes...i need to know ... The type and value of the condensateur... The power of the resistor If i need and preamplifier wich one ?(to work with CD player) A schematic of the power supply The 6.3V in DC or AC ? How many ampere for high voltage and hot circuit for one tube ? Can I test my tube before begin to build ?(i think no but...) If you can answer this...you 're the best.... I will put a tempo on high voltage...is it good? sorry i need all the detail to sart my project ....and learning... thanks a lot

9th May 2007, 07:49 PM	#7
Klimon diyAudio Member Join Date: Apr 2005 Location: Leuven	http://www.jogis-roehrenbude.de/Verstaerker/ECLL800.htm I think one ecc83 'll be more than enough gain. Simon

9th May 2007, 07:52 PM	#8
Steven-H diyAudio Member Join Date: Jan 2007 Location: The 1st State	Yes - I know...Which is rather unfortunate. But if you had the tubes on hand....

9th May 2007, 07:59 PM	#9
Klimon diyAudio Member Join Date: Apr 2005 Location: Leuven	Oops, overedited my last post... In Europe you could try to find an old radio and pull them but in the US they'll be scarce.. I've got the parts from a radio, should be a nice little project (still adding a few grey hairs ) Simon

9th May 2007, 08:33 PM	#10
Steven-H diyAudio Member Join Date: Jan 2007 Location: The 1st State	Simon, Thanks for the help ! I was also thinking of an ECC83/12AX7 driver. That said, that is beyond the rating of the power transformer I selected (it is rated at 130mA), so I will have to find something abit hotter - which unfortunately means larger. I was trying to make a nice small unit; any suggestions on some nice small 250v, 150mA, 6.3v@2A units Thanks ! Steve

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