Photo Gallery

[cadman]

Here ya go guys, a place to share pictures and a brief explanation of your favorite amp or latest project. For discussion or an in-depth writeup, let's post at the Discussion Thread. Hope this will suffice- Who's gonna start things off? (again)

 

[Sch3mat1c]

Looks like I can claim the first post! Hmmm what to throw on the pile....

 

[Sch3mat1c]

50C5 SE amp. First I ever built. Good for about 1W and maybe 250 to 10,000Hz - just radio parts, including the OPT. Line operated and no isolation of course, but it sounds good in its range.

Tim

 

[cadman]

Valco P-P

Guess I'll keep the ball rolling- This is my second attempt and current finished amp, based on a '40s PA design by Valco. Typical 6L6 PP. IIRC, the xformers are 30w Hammonds. Finished this one a couple years ago and still sounds pretty good, although there's some low level hum that still drives me nuts.

 

[cadman]

Shot of the back- 5 inputs, inverse fdbck switch, switched outlets. The chassis is done in black metallic, with light blue metallic sparkle that you only see when the light catches it, then a clearcoat over that.

 

[cadman]

All lit up like Christmas! The vol knob and top circle are EL panels. One step closer to high-tech, I included a delayed HV startup ckt that still works Thanks for letting me dust off the ol' amp and share! Who's next!?

 

[arnoldc]

Here is mine, a 300B based on JE Labs 300B DX but stereo.

RCA 76 - Hitachi 6SN7GTB - 300B (generic Chinese tube) - RCA 5U4G rectifier

[IMGDEAD]http://wap.misnet.com.ph/arnoldc/img_1786.jpg[/IMGDEAD]

 

[Bas Horneman]

Cool thread...This project is old by now and has been posted here before..but here it is anyway...That way I'll be subscribed to this thread as well.

Cheers,
Bas

 

[NickC]

My minimal casing structure and super messy set up


[IMGDEAD]http://www.geocities.com/nickchua81/fullviewofthe2amps.JPG[/IMGDEAD]

 

[Bas Horneman]

PSU for my phono amp.

 

[Bas Horneman]

And top....little greasy...but here it is..

I have used the colour used by Triodedick ...quite nice in real life

 

[YLS]

Here is my headamp K-501.
6Z4 retifier, 6SN7 direct couple to 6SN7s.
[IMGDEAD]http://yls.html.533.net/image/DSCN0548.JPG[/IMGDEAD]

 

[Sch3mat1c]

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

 

[billfort]

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.

 

[pedroskova]

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.

 

[pedroskova]

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.

 

[Sjef]

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.

 

[Sjef]

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.

 

[Sch3mat1c]

Update on the sweep tube amp project... I've started winding the OPT... what am I thinking...

 

[Sch3mat1c]

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