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Old 27th Apr 2018, 5:50 pm   #1
k_yller
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Default 6 watt push-pull amplifier

Preamp and splitter on EF95, triode strapped. Output stage EL95, fixed bias. Case MDF with zebrano veneer.
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Old 27th Apr 2018, 5:59 pm   #2
G6Tanuki
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Default Re: 6 watt push-pull amplifier

I like the style and precision of your tagstrip-wiring: I've done a few designs that way myself.
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Old 27th Apr 2018, 6:08 pm   #3
IanBland
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Default Re: 6 watt push-pull amplifier

I agree, that's a very handsome example of construction there. Both inside and out!
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Old 27th Apr 2018, 6:34 pm   #4
Al (astral highway)
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Default Re: 6 watt push-pull amplifier

Nice workmanship indeed, bravo!
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Old 27th Apr 2018, 7:29 pm   #5
Steve_Bell
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Default Re: 6 watt push-pull amplifier

It looks really elegant. Did you use a published circuit design? I've been meaning to get round to building an EL95 push-pull amp for over a year now.
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Old 29th Apr 2018, 9:03 pm   #6
k_yller
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Default Re: 6 watt push-pull amplifier

Thanks all for appreciation

Quote:
Originally Posted by Steve_Bell View Post
/../Did you use a published circuit design? /.../
Circuit of my own design . I have to make few tweeks before I will be able to publish it.
Telefunken Magnetophone85 has very good design of EL95 PP amplifier.
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Old 29th Apr 2018, 11:39 pm   #7
Argus25
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Default Re: 6 watt push-pull amplifier

Very tidy and well thought out layout.

It is always worth the extra work and time required to plan and make a project well and have it look beautiful when it is finished, then you can be very proud of it, which you should be, well done.
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Old 19th May 2018, 7:24 pm   #8
qualityten
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Default Re: 6 watt push-pull amplifier

It would be interesting to see the circuit, with information about the transformers and their covers. Beautiful work.
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Old 19th May 2018, 9:03 pm   #9
k_yller
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Default Re: 6 watt push-pull amplifier

Hi
transformers - from tbt-trafobau, bought on german ebay
hint-ausgangubertrager.
covers -it was stainless steel kitchen containers

circuit-before 0.47uF cap is 50k potentiometer, triode strapped EF95 ,( enough for input from CD ) can be also connected as pentode but in this case you have to remember some of EF95 are very microphonic, in feedback loop is 20k resistor,
fixed bias from PSU on LM317 then potentiometers, capacitors in anode circuit (1500pF) depend on transformer build , from 1nF to 2,2 nF
Heaters are biased on +70V (Vch 90V)
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Old 20th May 2018, 8:23 am   #10
qualityten
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Default Re: 6 watt push-pull amplifier

Thank you for sharing.
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Old 20th May 2018, 11:53 am   #11
Peter.N.
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Default Re: 6 watt push-pull amplifier

Very nice, that's proper electronic equipment. Everything I repaired my first few years in the trade was built like that.

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