^

Enhances, lubricates and protects...that stuff would sell like hotcakes in the Castro!

Edited July 27, 201114 yr by swt61

Bahaha

The little pen version of that is great for small tubes.

I'd never seen deoxit in a spray bottle though!

"I'd never seen deoxit in a spray bottle though! "

Jaycar and Element 14 (Farnell ) sell it...

Really??? My Jaycar mustn't have had it in-stock.

DEOXIT PROGOLD CONTACT CLEANER & REJUVENATOR - AEROSOL

Simple cleaners wash away dirt, grime, and dust from your expensive equipment but are often ineffective at cleaning tough oxidation and metal sulfide ... more... QTY 1+ $24.95 4+ $22.35 10+ $19.70 Enter Quantity

From Jaycar

I bought mine from parts-express I believe.

Anyone else get their shipping notifications from OnlineComponents for their RK50? I got mine last night, and I still can't believe I bought a $600 pot. My credit card has been screaming for mercy lately... =)

Edited August 3, 201114 yr by Horio

Anyone else get their shipping notifications from OnlineComponents for their RK50? I got mine last night, and I still can't believe I bought a $600 pot. My credit card has been screaming for mercy lately... =)

Nothing here. But I ordered a month after you did, fingers crossed!

Nothing here. But I ordered a month after you did, fingers crossed!

I think you ordered about the same time as I did. Just got my shipping notice last night, so it shouldn't be too long for yours to be shipped.

I'm seriously not looking forward to the custom fees on this one...

So, I bought some C3675 and A1486 from utsource, after seeing that they have it in stock in cheaper prices than bdent, and that this particular distributor seem legit from comments on diya.

I initially thought that all of these are fakes because of the uneven epoxy coating on the back side of the a1486 part; but measuring them gives me a minimum hFe of 30, a maximum of 67, while most of them have a reading about 60.

Similarly, most of the C3675 I got have a hFe reading around 58-71.

So both of these devices are within tolerance. Are there any reasons why I should not be using these devices?

You cannot really tell from that setup. You need to measure them at their rated voltages and a more realistic base current.

Edited August 5, 201114 yr by luvdunhill

arg. I guess I will have to build a KGSSHV supply for this purpose?

Yeah, I don't know what to say. I haven't had to deal with authenticating these parts, as every single part I have came from an authorized Renesas dealer with original packaging. One just has to be prepared to pay in bulk.

I would definitely buy in bulk. Leaves me with some extras anyways. Did you contact Sanyo for authorized distributors in North America?

I'm wondering how hot the PSU runs. Going to have the top panel made, right now I only have 2 vent rows at the back, on top of the transformers. Would that be adequate or should I need more venting? The bottom panel also 2 vent columns, not rows though. The panel is 5mm thick, btw.

The power supply pass FETs will give off quite a bit of heat. Also the current sources feeding the zener strings and battery will give off a bit heat. The active battery and resistors will generate a small amount of heat as well.

Basically you need to make sure there is venting above the PS especially the pass FETs. I've found that having additional venting in the top panel (not just over the hottest parts) will help as well.

As far as the bottom goes, it is a good idea to make sure there is enough venting to allow for good air flow. I'm not sure from your description above, but it sounds like you could use some more.

I don't remember which version of the amp you are building and was curious what the 4 large rectangular cut-outs are.

Thanks, Kerry. I'll add some more vent holes then. 4 vent columns should be fine, I guess.

The 4 rectangular cut-outs are just bling factor...

Very nice and simple to build

That's a slick design! Looks like you were able to pull it off nicely.

I like it!

that looks so lovely!!! really really classy

Returned from hollidays,

and today i finished the powersupply

My LM7912 also gave -15V like Gilmore ... but actually a spare TS7912 worked instead

I also had quite some trouble with the +250 rail (i gave only 90V). After some searching, it turned out that i switched the direction on the zener on the FET. Luckily i didnt fry any other parts, so now its working

Readings:

+576

+496

+246

-260

-495

-557

+11,87

-12,07

Now on, to quite a lot of wire-work ....

Edited August 9, 201114 yr by pedefede

Nice job!

The wire work aways seems bad, but it moves pretty quickly.

red mallee knob in progress

http://gilmore.chem.northwestern.edu/rmallee1.jpg

http://gilmore.chem.northwestern.edu/rmallee2.jpg

http://gilmore.chem.northwestern.edu/rmallee3.jpg

Edited August 10, 201114 yr by kevin gilmore

Damn thats purdy. How do I get myself one of those...