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Old 11th September 2003, 09:20 AM   #11
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And top....little greasy...but here it is..

I have used the colour used by Triodedick ...quite nice in real life
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Old 11th September 2003, 10:03 AM   #12
YLS is offline YLS
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Here is my headamp K-501.
6Z4 retifier, 6SN7 direct couple to 6SN7s.
Click the image to open in full size.
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Old 11th September 2003, 03:37 PM   #13
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Default Another brain fart

Looks nice, YLS!

My latest idea, an 80W amp, 31LQ6 sweep tube outputs, 6DJ8 LTP driver, 6EA8 preamp/CCS, 13GF7 (may change) screen regulator (125V 60mA max.).

If you look carefully you'll note I'm missing a chassis and two transformers

Tim
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Old 12th September 2003, 04:55 PM   #14
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Angela/Sound Practices WE91 based 300B SET with Electra-Print output transformer, ASC oil caps, Sylvania 6SL7 driver, Mullard GZ37 rectifier, WE300B, stainless/mild steel sandwich top plate on South American mahogany base.
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Old 12th September 2003, 05:57 PM   #15
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Thought I'd throw in my brother's 6sn7/300B P-P monoblock that is finally becoming a reality. It was built in partnership with an old friend of his. Chas(my brother) was responsible for the layout and construction of the chassis(machining, veneering,etc.,), while Mike designed and prototyped the circuit.

It's made of polished aluminum plate and veneered mdf, and has hundreds of hours put into the machining, etc., (for all four units). The transformer cover is fiberglass that was laminated over a mold and will have artwork applied.

Not your everyday amp.
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Old 12th September 2003, 06:01 PM   #16
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detail of aluminum panel w/ heater and B+ switches morticed into veneered bullnose.

With the exception of the back panel, all chassis attachments are blind tapped - hence, no screws to be seen.
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Old 13th September 2003, 01:09 AM   #17
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Here is a foto of the inside of my latest project. Looks much better on the outside but haven't got a picture of it.
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Old 13th September 2003, 01:33 AM   #18
Sjef is offline Sjef  Netherlands
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And another picture of one of the best sounding and also the vey cheapest PP penthode amp I have ever build. Had cost me about $75,- and beats every EL34 amp I have ever heard. It's completely build with military dump material wich cost about nothing. I really don't know wat I did but I never managed to build a better sounding penthode amp, even with the same tubes, better transformers and a lot more expensive parts. Just lucky I guess. It's build fully hardwired with ultrashort signal path a'la gainclone (didn't know at the time of building) and the whole thing is getting HOT HOT HOT, very HOT, every part of it, but it still work after 8 years.
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Old 17th September 2003, 03:08 AM   #19
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Update on the sweep tube amp project... I've started winding the OPT... what am I thinking...
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Old 17th September 2003, 03:10 AM   #20
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Default And...

A closeup of the winding so far. This layer is 110 of 450T (three layers hidden beneath this) which will be the first of four sections for the primary winding. 10mil of HDPE insulation will go over this before the secondary is wound on top, and so on.

Tim
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