Post your Solid State pics here

[quanghao]

Such a mess :-D What was the purpose of all that creamy stuff around the transformers? to glue them? Why not use a bolt and nut?

yes, It is a two-component adhesive, absorb vibration and keep the transformer fixed to the shell

 

[rfj5106]

"Yes, It is a two-component adhesive, absorb vibration and keep the transformer fixed to the shell "

Quangho: Using adhesive to contain transformer vibration is an intriguing idea! Does it work as well as you hoped? What exactly is the adhesive?

 

[maillard]

Hello quanghao,
What is a TL 400 ?
Is it a mono block ?
Why 2 transfos ?
Thank You

 

[jacco vermeulen]

Mr Quanghao meant a Telos 400, Goldmund.

 

[quanghao]

Hello quanghao,
What is a TL 400 ?

goldmun telos 400

Is it a mono block ?

yes mono

Why 2 transfos ?

it is good for play many speaker!

Thank !

 

[regiregi22]

"Yes, It is a two-component adhesive, absorb vibration and keep the transformer fixed to the shell "

Quangho: Using adhesive to contain transformer vibration is an intriguing idea! Does it work as well as you hoped? What exactly is the adhesive?

Regarding damping absorption of vibrations, it may be a better solution to use that kind of silicone (attached pic).

 

[maillard]

I had just finished amplifier complete copy of TL 400,
Invite me see it

Hi,
I like your building and the overall layout of the case.
Can tell us where did You get the heatsink ?
Thank You.

 

[quanghao]

Hi,
I like your building and the overall layout of the case.
Can tell us where did You get the heatsink ?
Thank You.

I can help you buy from China chasic, and can help you make the PCB, but I'm afraid the shipping costs will be very low! because it is very heavy.

you can refer to similar projects, but much cheaper!

http://www.diyaudio.com/forums/solid-state/215127-637-amplifiers-14.html#post3462603

 

[Jonny Quest]

Well it's taken about a year but I have finally "finished" my Leach Amp twins. I had the pleasure of taking Dr Leach's class about a decade ago and always had ambitions of building speakers and an amplifier to power them. Done and done.

The details:

• Leach Amp v 4.5 boards powered by 500VA 40V+40V toroids.
• ESP's Project 38 turns the amps on when a signal is detected.
• In standby a "breathing ring" glows through the front driven by 555 timer.
• Cases are custom with aluminum tops/bottoms and cherry veneer wrapped. Fortunately I had access to a waterjet to do all those vent holes.

For now I have one hooked up to the aforementioned speakers (RJB's Microbes) and the other will likely be hooked up to vintage 70 set that are currently being driven by a Pioneer SX-6000.

To do items are:

• Improving the grounding--the heatsinks make contact with the lid which is grounded to the bottom, but I want separate wires for each for redundancy/safety.
• Add proper fork terminals to the wires on the various terminal boards.
• Tie down the various wires

But for now I'm enjoying the fruits of my first amp project.

 

[hansonhols]

[/URL][/IMG]
A 6 channel preamp put together in an old BK Electronics MXF200 chassis. Uses one of those remote control ebay preamp modules using NE5532 opamps.
Has 3 channels of power amplification too (rear left and right plus centre channels) using one of the original 105w MXF200 modules plus 2 DIY ebay mosfet power amp pcbs to power rears. Sub and main front left and right got XLR connectors on the rear panel to goto crossover and main power amps.

 

[hansonhols]

[/URL][/IMG]

And the rear panel of the Preamp. Not labelled up as yet,
I will put some more pics up of some of the build in progress.

 

[hansonhols]

[/URL][/IMG]

The pre/power amps with crossover all connected up.

 

[hansonhols]

With the front panel off. The 2 Diy power amps are IRF9240 and IRF240 from memory. Actually they really deliver and are advertised as being 200w per PCB. not sure if that's true or not but they sound excellent.

 

[hansonhols]

[/URL][/IMG]

Inside one of the power amps this picture shows it before I sanded and sprayed the front panel gold.

Uses super stable Hitachi 2SK / 2SJ mosfets. 300w per channel into 8 ohms without breaking a sweat. Plenty of power with x2 500va toroids and 100volt 80000uf caps. lovely.

 

[hansonhols]

[/URL][/IMG]

Just for fun, an old system I had years ago.
Tri-amped and sounded great at louder listening levels but when listening at low levels there was a lot of fan noise and hiss through the highly processed signal.

Did sound nice and looked great all lit up!

 

[hansonhols]

[/URL][/IMG]

Sony CDP-911E
Very nice cd player with ALPS motorised volume on one set of pre-outs. nice touch.
NE5532 op amps, same as my pre-amp. I feel a good combination as I love the sharp crisp treble and tight bottem end these op-amps are renowned for.

 

[hansonhols]

An externally hosted image should be here but it was not working when we last tested it.

Top off a Sony CDP-911E cd player I just got off ebay for £60.

Not much to look at but I see the chance to upgrade caps for new fresh ones and possibly try some different op amps on it after fitting DIP sockets.



Perfect front panel and very nice sounding. Great that it has all those direct access buttons and super fast search for those long tracks that are recorded live etc.

 

[hansonhols]

Pictures look skew-wiff but when you click to enlarge they look normal again. Im new to uploading pictures in this manner but will get there in the end!

 

[hansonhols]

Inside one of the power amps this picture shows it before I sanded and sprayed the front panel gold.

Uses super stable Hitachi 2SK / 2SJ mosfets. 300w per channel into 8 ohms without breaking a sweat. Plenty of power with x2 500va toroids and 100volt 80000uf caps. lovely.

This is a DNA600 but its actually made by BK electronics. Recognise those power amp PCBs?

 

[dadod]

Line and headphones amp I designed and built. More info here: http://www.diyaudio.com/forums/analog-line-level/223835-current-conveyor-voltage-amplifier.html