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
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 !
Regarding damping absorption of vibrations, it may be a better solution to use that kind of silicone (attached pic)."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?
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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.
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
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:
To do items are:
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.
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
Attachments
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.
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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.
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.
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?
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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
Attachments
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