Commercial Gainclone kit- building instructions

[Peter Daniel]

It Is not encapsulated

All transformers I got from them were encapsulated.

As to amplimo, they used to be related, but I'm not sure if it's still the case.

 

[samoloko]

I think the one from pictures from post 321 Is not encapsulated

 

[Peter Daniel]

It looks like that, there's also a shield between primary and secondary:

 

[samoloko]

I thought that these transformers are Impregnated
and the encaplsulated are like this http://toroidy.pl/Obrazki/kubek.JPG

 

[Peter Daniel]

This is probably one of the options you can also choose.

 

[afunkymonk]

problem solved

I'm almost embarrassed to say that I have fixed the issue with my monoblocks. The speaker outs I was using are not isolated and they were mounted in a conductive plate. I removed them and hey presto...

Ran a 4ohm speaker at full blast from Ipod source for 1/2 an hour and the cpu heatsinks were warm but not hot. Gonna do proper casework now and will post photos in the gallery when finished. FE207E MLTLs are progressing too so am very pleased.

Thanks for all your help.

One more small question, if the amps prove way too loud, cna I reduce the gain by changing Rnfeedback? What would be a good value?

Cheers

Matt

 

[danielwritesbac]

Are you sure you didn't mixed up resistors on amp PCBs?
The values should be according to schematic here: http://www.diyaudio.com/forums/attachment.php?s=&postid=1508778&stamp=1210693738

Hi Peter!

The thought just occurred to me that you could ship a pair of 22k and a pair of 680R with the kit. Then a mixup is less likely, because it visually appears to be a pair of matching dividers. That's kind of pretty.

 

[Peter Daniel]

On a second thought, when you look at a picture, it actually very hard to mix those resistors: http://www.diyaudio.com/forums/attachment.php?s=&postid=1508773&stamp=1210693455

 

[danielwritesbac]

On a second thought, when you look at a picture, it actually very hard to mix those resistors: http://www.diyaudio.com/forums/attachment.php?s=&postid=1508773&stamp=1210693455

lol! Great photo. Yes, you're right, of course. Good ears too.

 

[soma_hero]

What would you all think about a Tap set like this?

Getting ready to construct my enclosure and I'll be tapping all of it. Want to blind tap most of it, so would I be able to do that with this set?

I know Peter uses a filed off tap to prevent drilling all the way through, and you have a three piece set for each hole right? Start, tap and finish or something like that?

These look like one tap per hole. Will these work ok?

Thanks,
mike

 

[Peter Daniel]

Only one tap per hole and I always do it with a cordless drill: http://www.diyaudio.com/forums/showthread.php?s=&postid=69413&highlight=#post69413

 

[Sparky OR]

Blind tapped holes

There are taps readily available that are bottoming taps, if you need.
But if the thickness of the panels doesn't require that...
One thing I do on aluminum, is to countersink before tapping, about the depth of one or two threads.

 

[AndrewT]

What would you all think about a Tap set like this?

useful if you do a lot of varied mechanical work.
No metric and no BA sizes, but maybe you don't need that facility in US imported products.

If you use one or two sizes regularly then invest in a 3tap set for those sizes, first, intermediate and plug. Those three taps will cost more than the whole kit.

With brass and copper you will probably find the carbon last quite well.
With aluminium you must use an extreme pressure lubricant. Steel tapping, even with the right lub, will blunt quite quickly.

 

[Dr.X]

Current?

Hi Peter,
With the pcb's I ordered from you I intend to build a pair of mono amps with the 25VAC+25VAC/225VA mains transformers in separate chassis (umbilical cable to PSU/audio boards).

My question is..... will a 5A (250VAC) rating be o.k. for the multipole plugs/sockets I will need to connect the supply?

These... Multipole Connectors

Many thanks,
Steve

 

[Peter Daniel]

Those should work fine.

I'm using 4 pin Neutrik XLR connectors which are rated 4A for receptacle and 10A for cable connector.

 

[AndrewT]

the advantage of the XLRs is the long pin/sleeve that connects before all the others.

 

[VictoriaGuy]

Hi, Peter-
My question is along the same line as Steve's- about power connectors.
I was admiring the chrome screw-on connector you used on some monoblocks (I'd hoped to attach a pic but apparently not allowed?), and was wondering if you could provide a part# and source.
The connectors Steve has referenced look good, but I'd like to avoid ordering from the UK if possible.
Thanks.
John

 

[Peter Daniel]

Those 4 pin chrome connectors are for CB radio microphone and should be available from e-sonic.ca

They were mentioned on a parts list attached to this post: http://www.diyaudio.com/forums/showthread.php?postid=136547#post136547

 

[Dr.X]

Those should work fine.

Thanks Peter!

 

[VictoriaGuy]

Peter-
Thanks for the info.
I notice that Neutrik also makes AC power connectors (Powercon), which look good- though they'd have to be well-labelled if using for DC to avoid accidental mis-connection down the years.

Cheers
John