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[Diabolical Artificer]

I made a few mistakes on my last build and was thinking of gluing some screw heads into the holes before powder-coating but filling and sanding would be much better.

It's called body filler as used on car bodywork. In practice it very hard to get a perfect finish, re filling in holes. A nut & bolt is far easier.

Nice work Alex, where do you get your knobs? Finding the right knobs takes some doing.

Andy.

 

[alex mm]

Hi , Andy thanks, apreciate. Knobs are from Ali...s .

Regards,
Alex

 

[TonyTecson]

My plastic casing ccd line amp, with fresh coat of copper paint...

These line amps are good with 7dj8, 7bk7, 7bq7, 6dj8, 6n23, 6rhh8, 6rhh2, 6922, 6cg7/6fq7, 6gu7, and many more others.

 

[qiuchun63]

There is no doubt that the modeling scheme is produced by AI, and the 300B SE is completed.

 

[filenet]

Nice pictures quichun63, you are indeed very keen at chassis manufacturing, just that there are things that I personally do not do, like running signal wire from back to front, or bunching wires together just to look tidy.

 

[qiuchun63]

Next prepare to correct the signal line problem.

 

[jcalvarez]

Great looking amp @qiuchun63 !
I do not see the AI traits though

 

[qiuchun63]

This time, there is no doubt that my computer modeling is not designed by artificial intelligence.

 

[filenet]

For sure, it's a big chassis, I bet you I can make it half, same components.

 

[dch53]

...things that I personally do not do, like running signal wire from back to front, or bunching wires together just to look tidy.

Back where I used to work a very long time ago in an engineering lab, all equipment was produced with huge looms of wire running around inside chassis. Techies were actually trained in to do it.

 

[qiuchun63]

For sure, it's a big chassis, I bet you I can make it half, same components.

I can do it too!

 

[qiuchun63]

Electronic tube front stage and ear amplifier

 

[xrk971]

 

[Fuling]

808 SE with 807 CF drivers and 6SL7 input stage. Yet to be tested, need to breadboard a power supply first.

 

[astouffer]

What brand of 807 is that? Looks pretty tough.

 

[Fuling]

What brand of 807 is that? Looks pretty tough.

Philips PE06/40N. Technically not 807s, but close enough I think.

 

[oemcar]

View attachment 1295589
View attachment 1295590
View attachment 1295594

OTL?

 

[Fuling]

Finally, after collecting 808s for almost twenty years and testing them on the bench with several different OPTs and with different driver stages, I finally got to hear them play music!
With zero NFB and cheap-ish guitar amp OPTs my expectations were low but it doesn't sound half bad. A bit of NFB to get a little bit of damping factor and some more voltage to get those plates glowing dull red, then this will be fine

 

[xrk971]

OTL?

No, big trafos behind the covers here.

 

[TonyTecson]

Philips PE06/40N. Technically not 807s, but close enough I think.

you may also try 5933.... https://www.radiomuseum.org/tubes/tube_5933.html