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Old 6th March 2010, 09:55 PM   #1
eeyore is offline eeyore  Australia
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Default EL152, GU50 and EL156

Hi, I am thinking of building an amp using EL152, GU50 or EL156. Anyone have experience with the tubes that can share their experiences and thoughts? Sound, operating points, etc?
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Old 6th March 2010, 10:11 PM   #2
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Wavebourn

also - look here : http://www.jogis-roehrenbude.de/
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Old 7th March 2010, 12:58 AM   #3
eeyore is offline eeyore  Australia
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My German is not so good at all. I found the page detailing history of EL34 and some Russian tubes. But nothing specific on the 152, 156 or the 50s. From what little I read on Jacmusic, the 152 and 50 are the same tube but with different bases. Both designed for Military use. The 156 seems to be the super version of the EL34. If that is the case what is the difference between the EL152/GM50 and the EL156?
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Old 7th March 2010, 05:59 AM   #4
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Yep, try to get Wavebourn to answer here or PM him. I bug him all the time!!!
I want to retube Quicksiver 8417 mono blocks with the GU-50 so maybe we can get some good erudite chatter on here!!!
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Old 7th March 2010, 08:39 AM   #5
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Default El152

EL152 is actually the LS50 in a new envelope after the war. in data its same as GU50 or FU50. The EL156 is a complete different thing to deal with
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Old 7th March 2010, 08:59 AM   #6
eeyore is offline eeyore  Australia
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Then the question is how much different is the EL152/GM50 to the EL156? I read that they are all improve on the EL34? Is that the case?
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Old 7th March 2010, 09:40 AM   #7
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thats not the case: LS50 (data same as GU50) was developped 1940 in Germany as a RF /Audio modulator purpose for the airforce, than later changed the glass housing. EL34 ( = 6CA7) was developped by Philips in the mid 1950s and the EL156 later by Telefunken.
Pls. dont mix them all up.
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Old 11th March 2010, 07:46 PM   #8
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I built a pair of SE EL156 monoblocks (Ultralinear, EF86 driver tube, Hammond iron) and they were one of my better tube amps. I used the Shuguang version which has an octal socket.

The amps were eventually converted to run 6550s as the guy I sold the amps to had a big stash of (real) Tungsols.
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Old 11th March 2010, 07:59 PM   #9
Svein_B is online now Svein_B  Norway
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I was surprised to find an EL156 amp in current production.
Sold out of Canada:

Click the image to open in full size.
MP-401 EL156 Integrated Amplifier
Musical Paradise MP-401 EL156 KT88 EL34 Tube Amplifier on eBay


15W SE (might even be true!). Nice looking, at a reasonable price.

Octal version of EL156, plug compatible with EL34/KT88.

(I have not figured out why there are 3 input/driver tubes per channel)

Svein
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Old 11th March 2010, 08:10 PM   #10
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Here you go: www.wavebourn.com • View topic - Pyramid-VII: home stereo vacuum tube amp
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