johnwmclean

Happy Birthday!

HaPpY bIRtHdAy

Better thermal conductivity due to finer surface smoothness is a well established proven fact. Whether I can prove there is a benefit is not my concern, my primary reason for employing this strategy is to have a potential that is advantageous rather than hindering. Very little work and material is required to achieve this, so why not?

Although the KGSSHV in question is one of Geoff’s beautiful builds I doubt there is any stupidity in there.

^ Here is a before and after shot from trying the above, worked a treat, I’m sure there will be some degree of thermal benefit. IMG_4947 s

Reading this article again... “I wonder how many readers have come across (especially) TO-220 transistors that look as if they had been machined with a chainsaw. A flat file, or fine wet/dry abrasive paper and water (no, it won't hurt the transistor) should be used to make sure that the surface is as flat and smooth as you can make it. In many instances, a device with poor finishing of the metal face may be indicative of a fake - counterfeit transistors are almost guaranteed if you buy at a very low price from any online auction site. Never hold the transistor in a vice and file it! Hold the file still, and gently slide the transistor on the file (or wet/dry paper on a sheet of glass) until it is smooth. There is no point having it nice and smooth if it is rounded - this will happen if you rigidly mount the transistor and hand-hold the file. When you are finished, you should be able to lay the transistor on the heatsink and see no light between the two surfaces, from any observation angle. Use a bright light behind the heatsink so you can see any surface imperfections. This little bit of extra effort may mean the difference between the success or failure of your project - at least in the long term.” I’ve got some mildly roughed up 10M90s on the mounting tab surface area, the al oxide pads I imagine aren’t as forgiving as a mica pads in terms flattening out in air pockets and filling in surface imperfections. It has me got me thinking or am on OCD overdrive.

Very nice. May I ask your current and temps?

Happy Birthday Sir!

Thanks for the link Geoff. I agree the Conrad sinks are finished very nicely, for my Carbon I’m using a Chinese supplier and the finish is not so great as it has a deep brushed finish. I’ve had the sinks machined by Cam-Expert and had cavities milled for the Cree devices, which I’ve also sanded and polished as the drag lines from the cnc were quite rough. Anyways here’s a shot of a WIP. IMG_6399

How critical are you guys with heatsink surface smoothness? As a standard I wet hand sand finishing with 1200 grit paper then buff to a shine, trying my best to be as even and flat as my tools allow.

MSB marketing is certainly weird, ultra expensive products with horrible cheap advertising.

Hang on, you bloody well forgot Australia.

That is very impressive work Kerry. Are they Conrad heatsinks? Have you got dimensions, just curious as to the total finished size.

Translation: Amplifier for true music lovers! This model is the evolution of development already well-proven design amplifier for electrostatic headphones-KGBH. Author of circuitry solutions is a great enthusiast of electrostatic sound-Kevin Gilmore. Inspired by the legendary amplifier STAX SRM-T2, he applied in its development of semiconductor amplifier similar to the balanced output stage arrangements. It is possible to obtain high output signal amplitude at low distortion and wide band audio signal.This model meets with two types of volume control. The base variant of the regulator is an attenuator relay type using signal relays Fujitsu Takamisawa touchpad Japanese version "Analog"-is a high-quality attenuator transformer type. Amp attenuators are used in the construction of the English company Sowter, and to switch findings from transformers use regulator precision rotary switch Swiss company Elma.Also in the configuration with the transformer pad appears able to use this model as a passive pre-amp.Technical characteristicsFrequency response: 5 Hz-100 kHz -0, 1dB 0Gc-180kGc-3dB 10 Hz-120kGc-3 DB (Analog)Total harmonic distortion: 0.01% <The output signal amplitude: 1600w (peak-peak)Gain: 60dBStandard bias voltage: 580V (Pro)Input connectors: XLR (two inputs), RCA (two entries)Supply voltage: AC 230 v, 50/60 HzPower consumption: 180WDimensions: 440 mm (w) 325 mm (d) 180 mm (in) excluding the height of the lamps.Weight: 16 kg Applied electronic lamps in the amplifier:4pcs. EL34 (6CA7)

The capacitors are not in contact with the heatsink therefore not going to be anywhere near those temps.

Astro did you test for over voltage? Cool, I pictured something else, I can't wait to see it finished.

Have a great birthday!

I had made a custom display cover for my 009s, very similar to yours Dave. Mine however does not have a hinged door, rather there is an ergonomic slit at the bottom on either side to run the cable through and slip your fingers under to lift off. Is a door going to be rather clunky and an annoying ritual?

Agree 100%, incredible album, absolutely amazing.

Ronnie Corbett I just have to look at his face and I burst out laughing. Genius. The world just won't be the same without you Ronnie.

Yeah, he’s new around here.

Don’t listen to these fools, I like your pillow case. Happy Birthday BTW.

$50,000 wank. Gotta come with warm hands for that price.

That shelf looks easy to make; Four theaded M25 rods 1500mm or so 20 x M25 nuts 8 x M25 domed end cap bolts 3 Marine plywood shelves 25mm thick Find a local wood shop would cut and drill the shelves if you don't have the gear.

Beautiful!