Audioromy 828A / FU-29 tube layout - diyAudio
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Old 27th April 2014, 07:26 AM   #1
milosz is offline milosz  United States
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Default Audioromy 828A / FU-29 tube layout

Can some tell me which sockets of the Audioromy FU-29 / 828A amp are supposed to have 6n11p and which are supposed to have 6N3p?

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I recently bought a used Audioromy 828A from eBay. I had one of the earlier ones and sold it, but ended up wanting another. The eBay unit arrived in fine condition, etc.

The amp I got has 5670 tubes in place of all the small dual triodes. In other words, two 5670 replacing the two 6N3p's and two 5670 replacing the two 6N11p's.

Now wait a minute- I know the 5670 and the 6N3p are equivalent- but the 6N11p? That's the same as a 6DJ8. Different transconductance, different max plate voltage, etc. Similar but not the same.

I have some 6DJ8's and want to put two of them into the amp, but since the amp is not labelled, which sockets were intended for 6N3p and which for 6N11p?

There's no website for the manufacturer and there was no manual etc included with the amp when I bought it.
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Old 27th April 2014, 09:54 AM   #2
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The 5670 is the pre amp. The 6DJ8 is the phase splitter and drives the 829b's or rY29's.
5670 = ECC42 or 6n3P. 6DJ8 = E88CC or 6n1P
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Old 27th April 2014, 07:53 PM   #3
milosz is offline milosz  United States
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Thanks. I can see that from the schematic. But rather than open the thing up and trace it out, I'd prefer to know which of the four 9-pin SOCKETS do the tubes go in? Please refer to the photo...

Click the image to open in full size.
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Old 28th April 2014, 04:30 AM   #4
Junm is offline Junm  Philippines
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6n3p has a different pin out than 6n1p...
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Old 28th April 2014, 07:23 AM   #5
milosz is offline milosz  United States
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Quote:
Originally Posted by Junm View Post
6n3p has a different pin out than 6n1p...

There are no 6N1p tubes in this amplifier.

There are only 6N3p, 6N11p and FU29 tubes
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Old 28th April 2014, 08:18 AM   #6
freddi is offline freddi  United States
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are these set of pictures any help? https://www.flickr.com/photos/rockho...7628460993937/
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Old 28th April 2014, 08:29 AM   #7
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heat of lamp 6N3P connected to the conclusions 1-9, 6N1P connected to the conclusions 4-5.
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Old 28th April 2014, 08:53 AM   #8
milosz is offline milosz  United States
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Thanks for all the posts.

By the way I was mistaken, there are no 6N11p tubes in here, there are indeed 6N1p's in the design. I just don't know which sockets are the 6N1's and which are supposed to be 6N3's. I guess I'll have to open it up and trace it out. I just thought someone would be able to tell me which tubes go into which sockets.
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Old 28th April 2014, 09:12 AM   #9
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The two outside tubes are 6N11s, the inside ones are 6N3s. To verify, you should see a jumper from pin 3 to pin 8 on the 6N11s.
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Old 28th April 2014, 09:52 AM   #10
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including amplifiers without lamps ,then take 6N1P shall set in the socket in the first row, if glow is, it is her place, if not paste the socket in the second row.
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